The Dangers of Choosing the Cheaper Option When it Comes to Precast Concrete

The Dangers of Choosing the Cheaper Option When it Comes to Precast Concrete

Choosing the cheaper option when buying anything is always tempting, but when it comes to precast concrete, this is a dangerous mistake. 

There are many ways that shortcutting precast concrete expenses can go wrong and lead to unexpected costs. Knowing these dangers is the best way to stay within your budget and prevent your project from becoming delayed.

Here’s what can go wrong if you choose the cheaper precast concrete option.

1. Drab appearance

One thing you’ll notice about cheaper options is that they don’t look as nice. But if appearance isn’t a major concern, these materials may be fine for your needs. 

Even so, you should consider investing in nicer-looking precast concrete to give your home or business that extra boost of curb appeal. Keep in mind that if you’re putting your precast concrete outdoors, it’s going to be exposed to the environment’s natural wear and tear, but will still need to look nice for years to come.

If appearance is a priority, why risk choosing materials that can’t live up? 

2. Less strength

When it comes to strength, cheap precast concrete will never compare. Good quality materials won’t bend or buckle under pressure and are made from high-quality ingredients that toughen up over time. 

Cheaper concrete is composed of low-grade minerals that tend to break apart after just a few years. Not only does this mean more repairs, but broken concrete is also more susceptible to mold, water damage, and rust.

3. Lacking in durability

When it comes to durability, premium precast concrete is the only way to go. If you want your new structure or installation to last for decades without any signs of wear and tear, you have two choices: cheap precast concrete that will fall apart after just a few years, or high-quality, durable concrete made from ingredients that are built to withstand the test of time.

Of course, many people are tempted to choose the cheaper option just because it’s a better deal in the short term. However, they end up spending more down the line in repairs and ongoing maintenance.

Along with being more cost-effective over time, high-quality materials are also safer because they’re less likely to fall apart and collapse.

4. Limited styles available

If you want the freedom to choose between different styles and finishes, you’ll want to look at higher-end concrete. The more you spend, the more you’ll be able to customize every aspect of the installation or structure so that it fits in seamlessly with your style preferences. This means you’ll have more control over design elements like color, texture, and finish–all while using premium ingredients that will last for decades.

Some companies even offer different textures and finishes. But of course, the trade-off is that these premium materials cost more than lower quality alternatives.

5. High maintenance costs

As mentioned previously, what you don’t pay upfront for precast concrete, you’ll likely have to make up for in repair costs later. Because premium precast concrete is strong enough to withstand extreme weather conditions, less maintenance is required over time. All you’ll have to do is keep it clean and let the high-quality materials work their magic.

If you’re investing in a precast concrete structure or installation that will be exposed to extreme weather conditions, it makes sense to choose high-quality materials for the best results. At Port Aggregates, all of our concrete products are made with the finest ingredients. It’s why we’ve been trusted for over 40 years! Contact us today to request a quote for your next precast concrete project.

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Interview: What Building Sustainably Looks Like for Concrete Structures and How to Achieve It

Interview: What Building Sustainably Looks Like for Concrete Structures and How to Achieve It

Building sustainably: there are many ways to go about it. (We’ve even discussed some ourselves right here on this blog!) But naturally, you might wonder which way is best for you.

If you’re in the concrete industry, it might feel especially critical now. After all, many professional organizations within the industry are more heavily promoting sustainable construction. And many are also establishing their own way to contribute to reaching net-zero concrete by 2050.

So, how should you contribute? And what does that even look like?

To shed some light on these questions and more, we’ve interviewed Kryton Vice President of Product Development, Kevin Yuers.

Thank you for joining us today, Kevin! Let’s start off with defining what building sustainably even looks like for concrete structures.

Building sustainable concrete structures means doing two things well. First of all, you need to build from the start with the smallest carbon footprint possible. Secondly, you need to build structures that last through their entire design without needing to be replaced or receive unnecessary repairs.

We know that concrete is a very durable building material. But we also know that its key ingredient — cement — has a very large carbon footprint.

So, it sounds like cement adds to the carbon footprint of concrete. Why is that?

You may have heard that for every ton of cement produced, a ton of CO2 is released.

Now, this is not exactly true anymore because cement manufacturers have made great improvements to their production processes and reduced this number by more than a third. But it is still a big number.

Most of the CO2 released is simply the result of the chemical reaction of turning limestone into cement, and there’s little that can be done about that.

What can be done is reducing the amount of cement you actually use in your concrete.

How can construction professionals reduce their use of cement?

Typically, the way that a concrete producer will increase the strength and durability of their concrete is to just add more cement. But there are ways to avoid that.

So, for example, many of our customers build concrete structures that are exposed to very abrasive environments, such as industrial floors, high-traffic slabs, and hydroelectric spillways. Instead of using cement-rich concrete to improve abrasion resistance, our customers add our Hard-Cem solution, an abrasion-resisting admixture.

This technology increases abrasion resistance without increasing cement content, lowering your initial carbon footprint. And because the concrete lasts more than twice as long with Hard-Cem, it can eliminate the need to replace worn-out concrete. What could be more sustainable than that?

What about countering other obstacles to a concrete’s life span like corrosion?

I can’t think of anything that contributes more to the deterioration of concrete structures than corrosion. Preventing corrosion should be a key consideration for any designer of concrete structures — especially infrastructure projects.

Again, we have to ask ourselves: what can be done to extend the life of this structure without increasing its carbon footprint right off the bat by adding more cement?

It turns out that the crystalline waterproofing admixture technology invented by Kryton in 1980 is an answer to this challenge for many structures.

Our admixture for concrete, Krystol Internal Membrane (KIM), is used today all over the world to replace membranes in water-retaining structures, basements, tunnels, and the like. But one of its lesser known advantages is its ability to delay or prevent the corrosion of reinforcing steel, which is especially a problem in places where reinforced concrete is exposed to salt like marine structures or transportation structures in cold climates.

KIM sounds like a perfect remedy for that. How does it work?

You may have heard of emerging smart technologies in building materials. These are materials that can react autonomously to events or changes in their environment by repairing themselves. Such self-healing or self-sealing is one of the ways that KIM works to protect concrete from leaks and corrosion.

If the concrete is poured with a porous area or if a crack should form, the technology from KIM reacts by growing crystals to fill the area and block the movement of water and salts from reaching the reinforcing steel. We call that Smart Concrete.

That’s great insight, Kevin! So, in short, for those looking to increase their concrete construction’s sustainability, they should strongly consider using Hard-Cem and KIM.

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Choosing a Waterproofing Strategy for Below Grade Applications: A Fourth Alternative

Choosing a Waterproofing Strategy for Below Grade Applications: A Fourth Alternative

Considering the right waterproofing strategy from the design stage is crucial for the success of below grade projects. However, there is no one right answer.

So when faced with this decision, the designer of a project will often start by selecting from several types of external membranes. These include unbonded, fully bonded, and compartmented systems. Each of which will affect the outcome of a project differently.

But no matter their choice, a designer will have many variables to consider.

That can be difficult to navigate. So to help you determine the best strategy for your project needs, let’s look at the factors that affect waterproofing decisions and outcomes and whether there’s a better alternative altogether.

The Factors That Affect the Selection and Outcomes of the Three Membrane Types

Designers typically select one of the three waterproofing membrane types based on the following factors:

Perceived risk of using the systemAccessibility for repairing system defectsQuality control tools of the selected systemOverall cost

Perceived Risk

Out of the three waterproofing membrane categories, there is one that is seen as less risky.

A bitumen waterproofing membrane rests partially unrolled on the ground.

Many View the Use of Fully Bonded Systems as the Reliable Waterproofing Strategy

The idea is that in case of failure, water cannot travel freely between the membrane and structural concrete, so any damage will be localized. That minimizes the cost and scope of the repairs needed.

Despite that big advantage, fully bonded systems also have their drawbacks. They are not flexible when bonded. They cannot bond properly to the structural concrete if not applied properly and in dusty conditions. And most importantly, these bonded systems are thin, making it easy for them to get damaged.

Still, these particular systems tend to remain less risky than others, even when it comes to application errors (see Figure 1).
On a graph that compares risk and application errors, unbonded membrane systems are the most at risk while compartmented membrane systems are at second place and fully bonded membrane systems are last.

A group of construction workers are working on pouring concrete at a worksite.

That Risk Changes, However, When Bad Concreting Practices Are Involved

Note how the dynamics change with bad concreting practices. The risk associated with application errors deviates as follows (see Figure 2).

The risk of application errors change when bad concreting practices are involved, making fully bonded membrane systems a bit riskier but still not as risky as unbonded membrane systems.

In this scenario, the bond between the membrane and structural concrete would have been compromised. Once that occurs, a fully bonded system will become riskier than a compartmented system due to the following reasons (among others):

Membranes in fully bonded systems tend to be thinner than ones in compartmented systemsThey don’t have horizontal and vertical protection as many compartmented systems doThey also do not have the same reactive system for repairs with flanges in each compartment

No matter the system, however, the risk related to application errors is shown as much steeper (as seen in Figure 2) when there are bad concreting practices involved. You need only compare the risk to a project with good concreting practices to see the significant impact (as shown in Figure 1).

ccessibility for Repairing System Defects

For stakeholders who prefer a waterproofing system that workers can access for repairs if something does go wrong, compartmented systems are perceived as the best (see Figure 3).

Why is that the case?

It’s mainly because it is possible to attempt to repair each leaking compartment of the system with injection flanges.

As for the other waterproofing systems, the unbonded one remains the riskiest, as it would be very hard to determine the source of its leakages.

Again, what adds to the complexity of just selecting the best perceived waterproofing system is a poor concreting application.

In this case, combining a poor concreting application with a compartmented system means water is more likely to migrate between compartments. That will increase the risk of the compartmented system’s waterstops not bonding adequately to the structural concrete. At the same time, isolating individual compartments in the system and repairing them with flanges will become less effective, since the water will be migrating between adjacent compartments. And that leads to a change in risk assessment (as seen in Figure 4).

The risk to application errors graph shows poor concreting practices increase the risk of compartmented membrane systems so that they are closer in terms of risk to fully bonded membrane systems.

Quality Control Tools

For stakeholders who depend on quality control tools to ensure that a membrane is installed properly, a polyvinyl chloride (PVC) compartmented system might be more appealing. Usually coming with the desired quality control tools, it has an edge over most types of fully bonded and unbonded systems.

The quality control tools that a PVC compartmented system typically comes with include a double-wedge welding of membrane overlaps. And that’s followed by pressure testing to guarantee that the overlap is properly welded.

Other quality testing measures for the overlaps in this case might include vacuum testing and spark testing.

All the above are great tools in theory. However, this quality control edge tends to be more theoretical than realistic in many instances. Such instances include (but are not limited to) vertical membrane applications. After all, it would be very unpractical to make a double-wedge welding joint and test each individual joint in vertical (or otherwise complicated) applications.

Overall Cost

Cost per system is not universal and differs in each market. But in general, an unbonded system is the cheapest, while fully bonded and compartmented systems tend to be more expensive.

However, when we consider what I call the membrane system lifetime value, cost assessment tends to be more complicated. The lifetime cost would include the initial cost of the system, the expected life of the system, and repair costs of the membrane over the service life of the structure. Once again, concreting practices play an important role with the associated costs of repair and replacement. Choosing a waterproofing system based on cost is therefore a complex decision that includes many variables, which are hard to quantify.

A group of construction workers at a worksite are helping to pour concrete for a project.

Why Concreting Adds Complexity to These Factors 

Waterproofing is an interconnected network of activities. So rationally selecting the appropriate system depends on many variables. A common variable that adds to the complexity of the selection and on the consequences associated with that selection is the quality of the concrete. That in turn is a function of the structure’s concrete mix and application. Therefore, it is impossible to assess the performance of the waterproofing membrane system in isolation without considering the concrete’s quality.

A construction worker is pouring KIM into concrete at the time of batching.

How to Simplify and Improve a Waterproofing Strategy with a Fourth Alternative

The fourth alternative is not a compromise between an unbonded, fully bonded, or compartmented system. A fourth alternative is a better waterproofing strategy. It’s a waterproofing solution that simplifies a designer’s choice while providing more predictable outcomes.

Simply put, the fourth alternative is to design and construct a waterproof structure that can sustain itself without external protection. That eliminates the concern of that external protection defecting or failing, as it transforms the concrete itself into a solid waterproof barrier. It also minimizes the need for extra labor or application time, as there is no membrane to install.

But how is this waterproofing strategy possible? What makes it work?

It all functions off the following principles.

The Structure Should Be Waterproof for Its Entire Intended Service Life

This is attained by using quality concrete, proper jointing systems, and adequate reinforcement.

The latter follows conventional construction methods, so let’s focus on those first two aspects.

To obtain quality concrete in this case, builders need to ensure that they use a suitable mix that is permanently waterproof. An easy way to do this is by applying a reactive waterproofing admixture, such as Kryton’s Krystol Internal Membrane
™
(KIM), with the established best practices for mixing, placing, and curing concrete.

Once added directly into the concrete, KIM disperses Krystol technology throughout the concrete mix, which remains dormant until water is nearby. When in the presence of water, the chemical technology reacts, forming interlocking crystals to block pathways for water in the concrete. That reduces the concrete’s permeability, shrinkage, and cracking. It also improves the concrete’s ability to self-seal for the rest of the structure’s life span.

But what about proper jointing systems?

Special consideration should be given to jointing details, including construction, expansion, and control joints. Using a combination of physical and chemical barriers is recommended for long-term performance. A good example of this is the Krystol Waterstop System. It offers three levels of protection for all jointing details. Depending on the level of protection chosen, the system might make use of two types of waterstops (one for sealing joints and one for crack control), a crystalline slurry that uses Krystol technology for concrete joints, and a crystalline grout.

For Extra Reliability, Designers Need to Determine a Suitable Repair Strategy

With a reliable waterproofing admixture and jointing protection system, a concrete structure should be quite safe.

But it’s important to include redundancies into a waterproofing system. It’s what gives a structure extra protection in case the situation does not go as planned. But to include those redundancies, designers need to consider a suitable repair strategy.

The repair strategy should be based on durable materials that are compatible with concrete. It should not be cosmetic and planned for the short term as it has to be able to fix the problem at its source. Otherwise, the problem will remain present, causing more damage in the long run.

dditional Protection Needs to Be Considered When Handling Projects That Are Considered High-Risk

These can include liveable basements, museums, and other structures where the cost of repairs is very high.

If that is the case for a project, a designer could add a membrane system to the waterproof structure. Selecting one will depend on the previously mentioned factors. But in general, as discussed earlier, the quality of concreting practices will affect how well a membrane type will perform. So it’s important to maintain good concreting practices no matter which type of waterproofing membrane system is chosen.

In short, the fourth alternative is a waterproofing strategy that fundamentally relies on a self-sustained waterproof structure free of application and additional labor concerns, a suitable repair strategy, and when necessary, the extra protection of a waterproofing membrane system.

Free e-book! Download it today to learn about the four aspects to consider when specifying crystalline waterproofing admixtures.

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Avoiding Concrete Cracks in the Winter: How to Prepare Your Concrete

Avoiding Concrete Cracks in the Winter: How to Prepare Your Concrete

One of the most dreaded things about winter is its damaging effects on concrete. This can be a costly and frustrating problem, but it doesn’t have to be! 

There are numerous easy ways to help avoid concrete cracks this winter. Follow these steps to prepare your driveway or other concrete slabs for the cold months ahead.

Seal your concrete surfaces 

In winter months when snowfall and low temperatures freeze the top of your concrete, frost damage can occur if they are not sealed. Sealing your concrete protects the surface and makes it easier to remove any ice as well. 

Remove debris

Regularly scraping away any leaves that fall onto your concrete as the seasons change is vital to protecting your driveway or other concrete fixtures. Leaves and other organic matter will prevent your concrete from getting the proper exposure to sunlight it needs in order to avoid freezing.

Repair any damaged concrete

If your concrete has become damaged or is already cracking, you need to take care of it as soon as possible. 

Cracked concrete exposed to freezing temperatures can cost thousands of dollars to replace and is likely to continue deteriorating over time if you do not repair it before temperatures continue to drop. 

Be sure to inspect all areas of your property that have concrete. It is possible that your gazebo, deck, or walkway might need replacement too.

Be careful with salt 

Using too much salt as a melting agent can actually damage your concrete, causing it to become brittle and more likely to crack. It should only be used in moderation. Fortunately, in Louisiana, this shouldn’t be too much of a concern for us. 

If you follow these steps, you can avoid the nightmare of having to replace cracked concrete this winter season. Don’t wait another day to start protecting your concrete. 

With the Louisiana weather being as unpredictable as it has been the past couple of years, there’s no telling what this winter will bring. Start taking steps to protect your driveway now and contact Port Aggregates for assistance. We look forward to helping you keep your concrete safe this winter!

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An SSA student’s perspective on working in construction and practical workshops

An SSA student’s perspective on working in construction and practical workshops

Women in South Asia have long been doing intense physical labor in building sites and brick industries for relatively low pay. And, yet it is discouraging to be a part of a heavily male-dominated construction industry. Whenever I passed by a construction site, I felt powerless and afraid of the tools that men carried effortlessly, as if to prove that gender disparity in the labor market exists for a reason. In other words, the construction world felt unattainable in all its toughness.


Image Source: Women at work © The Record Nepal

As an aspiring architect, the dichotomy between architecture and construction seems nonsensical, particularly in the ever-evolving realm of sustainable architecture, where prototyping and experimenting are at the core of design processes. There is also an assumption that architects are above construction workers – a dynamic that sustains social and class imbalance. While there are many structures to criticize about, luckily, there are also associations like Critical Concrete who facilitate three-weeks of intense, hands-on workshops to understand the material, building techniques, and teamwork as part of the post-graduation course in sustainable architecture. The workshop positively shifted my perspective of the construction industry and further expanded my own personal boundaries.

“Let’s get our hands dirty!” architect Hanno Burtscher, instructed a team of ten women who came from different professional backgrounds, race, and geographical locations. Hanno introduced himself as an earthman, with an Austrian sense of humor, quick wit, and great teaching style, he grouped students in pairs to use all four senses except for sight to identify the local materials used for raw earth construction. This is how the welcome ceremony to the workshop began and it had already set a higher bar for the rest of the workshop. The joy of sharing stories moved the conversation from endless banter about cheese and food to serious topics like what sustainable construction means and how the uncertainty during the time of pandemic has affected our lives. In short, the day exuded a sense of togetherness. 


*Sketch by Charlotte Schneider, Alumni, Post Graduation 2020-2021

WEEK 1 | RAW EARTH CONSTRUCTION | HANNO BURTSCHER

The first week of the workshop was a battle – a battle to make proper earth mix to build a heated earthen bench and flooring for the kitchen at Critical Concrete. From the start, we learned that the key components of earth mix are clay, small gravel (0-5 mm), big gravel (5-15 mm), sand (0-4 mm), and water.

Most of us were already aware of the composition elements through our Raw Earth online course, but what made the difference in the practical workshop was the experimentation and improvisation in the mixing process since the excavation materials were available in limited amounts. The question constantly surfaced during the workshop – how do we make the most use of what is available around us? And this was a revelation in itself because theoretically, we learn the ratio – 40% of excavation, 20% of small gravel, 20% of big gravel, 20% of clay, and water – to achieve the desired mix. 

In practice, however, there had to be adjustments in the ratio based on the materials that were available to us. The way we integrated the composite materials together also made a big difference in the quality of the earth mix. So, at times we had to find creative ways of using what was available to us.

“While nearing the end of the earth mix for the floor, we ran out of the large size rocks. My typical mindset is to say, “Let’s just go buy more.” However, with the mindset of Critical Concrete to use what we already have, we were not going to buy more. To finish the mix, we scrounged throughout the construction yard looking for proper sized rocks and were able to get the right volume,” Mary shared her experience. And this was the general experience during the workshop – how to find sustainable solutions when we hit a roadblock.

In our earliest days of the workshop, we dropped a fist-sized earth mix balls from 1 meter height to see whether they stuck together or crumbled. We concluded that the ball should drop in larger pieces rather than completely shattering or sticking together. If it’s too sticky, either the clay or water content is too high which will result in a mixture that won’t be suitable to create a form. The same logic applies for the dry mixture as well. After a process of trial and error, we realized that there was no concrete recipe to achieve the perfect mix. But there were a number of factors that determined the quality of the mix. One of them is the clay content, which is normally 20 percent in total but depending on the situation, it could range from 5 – 30 percent. The purpose of the clay is to bind the materials but the more surface area we have in the mix, the more clay we require, from which we can derive that the smaller the surface area of excavation, the higher clay content would be required to bind it. Simple physics!

Many construction sites are not inviting spaces for women. Women’s work is often considered too frivolous to the degree that they are rendered valueless in the number-driven capitalist economic system. During the workshop, this dynamic was challenged. A team of mostly women and Hanno prepared the foundation for raw earth flooring and built the formwork for the bench. As I was lifting heavy stones and using power tools, I occupied a space that was not ‘normalized’ for women. I quickly realized that the problem wasn’t these too feminine, delicate hands but rather it was the devaluation of women’s work that put women in confinement of patriarchal ideas.

“We either put 100 percent into this or we don’t do it at all,” Hanno remarked while we were putting earth mix into the form work. The workshop was fueled by this exact mindset but was also filled with laughter and leisure in between our hard work. Overall, during the first week with Hanno, he guided us by observing the way we were interpreting the materials. We were able to experiment with the materials and make decisions based on our judgement.

Week 2 | Esposende Building Site | Hugo Dourado, Pietro

Degli Esposti, Martina Eandi

Esposende was roughly a forty-minute drive away from the city of Porto. And when the drive is long, conversations of past, present, and future start bouncing around.

“How do you say it?” Bara from Czech Republic asked.

“Vastu Shastra,” I repeated.

“And that means harmony of energy through design? That is how I would like to design the interior of my place one day,” remarked Charly from Germany. 

The conversation moved in such a way during the Esposende trip. The practical workshop as a part of the post graduation course merged people with similar ideologies, dreams, and passion of bringing social and political change through architecture and urban planning. The workshop also meant more than fulfilling a part of the course. Some of us had flown miles away leaving their usual life to come to Portugal to venture in a new journey.


*Sketch by Charlotte Schneider, Alumni, Post Graduation 2020-2021

The building site was under construction, so there were different tasks that the students could choose from such as fixing the board and batten cladding system, wood charring station, tiling the roof, or constructing a rocket stove.

The name rocket stove in itself made me curious. On top of that, I had also done some research on rocket stoves in one of the Participatory Design courses. I started my second week with Pietro, our Raw Earth course instructor and Martina, Mycelium course instructor, to complete the stove that could be used for both cooking and heating the entire house.

The making of the rocket stove involved lots of earth mix, it didn’t involve knowing rocket science at all. First, a stone wall had to be built to lay an exhaust pipe with an inclination of 30 degrees. The purpose of this was to carry the smoke from the rocket stove out of the house. For the stone wall, we prepared Argamassa (mortar) to attach stones of many sizes together and this alone took days to finish. As soon as the wall was completed, we started to make the exterior of the rocket stove with earth mix. The earth mix was ¼ part lime, 2 ½ part excavation, and ½ part straw. Since we were working with materials that were locally available, the excavation we were using included large stones. We wanted the mix to be a combination of lime, earth, and straw, so we sieved the stones out.

At times building with raw earth felt like cooking, in a sense that there is a process to achieve the result. You cannot skip a part to make the process faster, there is a procedure that you must follow otherwise the mix will not be suitable for construction. Therefore, while making the earth mix, it is important to completely let lime and excavation combine before putting any water. Once lime and excavation are completely mixed, giving off a grey-brown color, you slowly add water and straw to make a mixture. We used the cob technique to compress and compact fist sized balls, smashing it to attach them onto the pre-existing walls.

Slap slap slap!! We were hitting the earth mix on the side with a board to pack it down together. Another important thing that Pietro shared with us was that the cob technique allows us to build 30 cm per day. Since the earth mix is massive and wet, it needs time to dry and be compacted to build another layer on top of it. To keep the layers of earth mix interconnected, we created a vertebra-like structure at the end.

​​The rocket stove workshop made me realize how earth as a material is flexible. I could mold it in any shape I wanted and working on it with hands felt therapeutic. With the rocket stove, we were trying to achieve a dome shaped exterior to give it a character of its own. We molded the earth mix into long tiny sausages to create a curve on the upper part of the stove. It was interesting to see how earth could be shaped into any form with the right formwork which is also one of the big advantages of working with this natural material.

Life on Site

The Esposende building site was located between the ocean and mountains. In the early morning, you could see the tip of the mountains covered in fog and in the late afternoon during those early hot, summer days, you could see the blue ocean in the distance. With our cup of coffee that the Critical Concrete team prepared for us every morning, the day started with division of tasks and the students always got to pick first which task they wanted to be involved in.

After our coffee we all got into the groove and the site came to life again. Some of us were carrying heavy stones, using power tools, hanging on the roof putting tiles while others were listening carefully to what Hugo, our Vernacular Architecture course instructor, with immense knowledge and a sense of perfection, had to teach about board and batten cladding systems. It was fascinating to observe how everybody worked individually and in teams and clearly I wasn’t the only one who thought this. The neighbors in Esposende would walk by observing, commenting on our work, with their hands clasped behind their backs!

“It’s called umarell in Italian,” Linda shared jokingly.

Apparently, in Italian slang, umarell is when elderly people gather to observe construction sites and comment on how to do the work, often with holding their hands behind their back.

I became a umarell when it came to food. The Critical Concrete team prepared big batches of healthy, colorful vegan food during lunch time and we would all observe in awe. The variety of food made from simple ingredients that Critical Concrete provided us inspired me to be creative with food that we eat on a day-to-day basis. How many times do we actually think about eating in a sustainable manner? How do we creatively use leftover food in our diet? These questions among many others helped me unlearn and learn new ways of looking at sustainability.

Week 3 | Furniture Workshop | Samuel Kalika

I noticed how different building materials can be. Whereas with raw earth, exactness is not so important, with wood each millimeter is important. Building beautiful furniture requires many steps, patience, and exactness,” Viviana shared. After working with flexible material like earth, wood seemed like unlocking a whole different dimension. Samuel, our Participatory Design course instructor, understood this well and he made our work easier by giving us instructions on every powerful tool we were using.

Precision was the key. While cutting wood, if it’s 1 cm off, what could we do? We could not undo a cut once it was made neither could we adjust it, so a big part of the furniture workshop was to find a solution on the spot. We used many different tools to achieve the desired finish and construction: a universal machine to obtain desired thickness, sizes, flatness, and straight surfaces; the meter saw; the sander. Gradually the counters for the kitchen in Esposende house began to take shape. “As soon as I started approaching the work, I understood the importance of being precise in all the small details. Once we developed a good flow in the process, the work became easier and faster,” commented participant Linda Tonin.


*Sketch by Charlotte Schneider, Alumni, Post Graduation 2020-2021

While trying to achieve precision, mistakes are bound to occur but this is part of the learning process and that made the experience lighter and took away the fear of judgment. 

“To assemble the pieces, in particular for the bigger elements, we set up a strategy, naming the pieces of wood and measuring the different thicknesses needed for the joining beams. Since different people worked on the cutting process, sometimes the joints’ holes had different sizes. We took these mistakes as an occasion to add different colors of wood to fill the spaces: the mistakes, at the end, added aesthetic value to the furniture pieces,” Linda reflected.

REFLECTION

During the whole workshop, each one of us were sharing our experience of working in different environments. We were trying to understand what our preferences are, what materials, tools we like to use, and which instructors’ teaching style catered to our learning approach.

“Beyond the excitement, time passing and the verge to finish, it was necessary to maintain a safe working space, making sure you and everyone around is comfortable and don’t cause any danger. Having this in mind, I learned how to remain calm and careful with all the tasks, machines and my colleagues. This atmosphere brought a lot of awareness and future-thinking into my habits,” Agnieszka described her experience.

“Starting with the fact that the workshop took me out of all my comfort zones, I can say that the first learning was that the “unknown” can be very good. And the learnings went beyond practical. Being in contact with such an international and so human team certainly awakened in me my best version, my confidence in a more correct and viable future and made me reflect and work on my limiting standards. It was definitely a great achievement to be in a healthy work environment,” shared Júlia.

I resonate with both Agnieszka and Júlia. My experience with working in a group was liberating. It taught me how everybody in a team works differently — how each individual works, thinks, coordinates and cooperates while working on a project. On top of that, our group was very diverse, so learning from each one of them and getting to interact with everybody in-person felt special during this uncertain pandemic time. We were able to transfer our expertise and learn from each other’s skills. At the same time, we were a group of women doing construction work, realizing our own potential and that was empowerment in itself.

On a personal note, the workshop also altered my relationship with the construction industry and my perception of emancipated women. Historically, women have existed within the confinement of domestic space therefore women who occupy space outside of the predictable situations are labeled ‘modern’. And if the working conditions are healthy and their work is comparable to the status of a male, they are given recognition and visibility. But are all women able to get the same visibility and prestige as the emancipated, educated women? Women from lower class and caste in South Asia have been working in extreme conditions in construction sites and brick factories out of economic necessity. They have to go through daily work toxicity in a largely male-dominated workplace. While reflecting back on the practical workshop, I realize the utter importance of an equal workplace environment in the labor industry and greater recognition of those women who have paved the way.

The post An SSA student’s perspective on working in construction and practical workshops appeared first on Critical Concrete.

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What is a Boom Pump?

What is a Boom Pump?

Have you ever come across a concrete boom pump before? Unless you work in the construction trade, you may be forgiven for not really knowing what a boom pump actually does. However, for commercial and residential construction projects alike, it’s one of the most useful concrete pumping and layering tools out there.

What Exactly is a Concrete Boom Pump?

A concrete boom pump truck is an item that will help to deliver and pour concrete to projects which might have work being undertaken high off of the ground. For example, you may be working on a high-rise building or a block of flats, and it might otherwise be tricky for you to get concrete or cement up to such a height.

A boom pump offers a hydraulic arm, which stretches up from the vehicle’s base level to pump concrete directly to the project area. A boom pump can arrive via truck, so that you have a mobile unit at your disposal, or you can also invest in static systems, too. Of course, there are no right or wrong answers as to which system works best here – it’s all a case of considering your individual needs!

You’ll likely want to invest in a concrete boom pump if you are struggling to get those trickier bits of your construction or building project layered in concrete from a standing level. In many cases, this type of pump will take away plenty of time and effort and will make sure that there is less labour involved with concrete layering.

How Else Might a Boom Pump Device be Helpful?

As mentioned, the boom pump system is great if you have high-level concrete pouring needs. It’s also a fantastic asset if there are obstacles or obstructions in your way, and normal concrete pumping or pouring systems are unable to support you.

You might also find that this type of concrete pump is ideal for pouring mix from above down onto a project. Ultimately, you’ll find that a boom pump is going to give you easier access to some of the trickier points and fixtures which traditional concrete solutions just can’t handle.

The best news is that a boom pumping system is very flexible, meaning that while you can generally expect a stretch of around 72m at basic length, you can also invest in extensions or ask for additional help from concrete suppliers.

Is a Boom Pump Right for my Project?

If you are finding laying foundations difficult due to tricky to reach spaces, then a concrete boom pump vehicle could make all the difference. Why not take a look at the pump options available and take a chance on a more flexible system and operation for your building and construction needs?

There’s no need for you to be doing more work and taking on more hassle than you need to. A fantastic boom pumping system could save you time, money, and energy. Take a look at what’s available and compare! If you would like to find out more about how we can help you, get in touch today on 07812 182778 or head over to our contact page for more details.

The post What is a Boom Pump? first appeared on Base Concrete.

What is Reinforced Concrete?

What is Reinforced Concrete?

A lot of you will be familiar with reinforced concrete as a building material, but may not be aware of the finer details. Commercial concrete is often a good solution for building work, we will be discovering a bit more about why this is the case, and the best ways to go about using the material for your building projects.

Everything You Need to Know About Reinforced Concrete

Commercial Concrete

This is concrete used as part of a building project, often used to create or enhance business facilities, industrial buildings, warehouses and retail stores. In an average building, you will find commercial concrete in plenty of spaces, such as the walls, floors and even some architectural details. A large majority of commercial buildings would have been put together with heavy use of commercial concrete. Like domestic concrete it has many benefits when used on a building site, durability being one of the most obvious.

Domestic Concrete

Domestic, or residential concrete usually has less demand placed on it in terms of structural performance and durability, but in itself, it is still considered a durable building material. Domestic concrete floors and pavements usually require a lower strength mix design and lighter reinforcement than commercial concrete.

Concrete Pumps

The purpose of a concrete pump is to have a tool that can convey liquid concrete. This works by having one piston drawing liquid concrete into a cylinder from a hopper while the other piston simultaneously pushes concrete out into discharge pipes. There will be a valve which can determine the cylinder that is open to the concrete hopper and the one which is open to the discharge pipes, which gets switched over each time the pistons reach an endpoint, with the process continuing with the first cylinder now discharging and the second drawing fresh concrete from the hopper.

Concrete Services

If you need to deal with reinforced concrete there are a couple of things that are crucial to consider. You need to make sure that if you are laying the material yourself you know what you are doing with it. You must also make sure that the concrete is of a high-quality standard. You must have the facilities to mix it correctly as well as an appropriate skill/strength level to physically handle it/the required machinery.

Alternatively, you may need to use the services of a professional concrete company, like Base Concrete, to prepare and lay the concrete and get your building project completed. Commercial concrete can be a great asset to all sorts of projects and can be purchased with some very good deals, just make sure you are only ever involved in using the services of professional and trusted companies. It is almost a guarantee that your area will have quite a lot of concrete services operating in your area where you can purchase your desired amounts of commercial concrete or have a service bring around the material and lay it on your behalf.

So, for all your concrete needs, contact Base Concrete today on 01442 389105. For more details, visit our contact page.

The post What is Reinforced Concrete? first appeared on Base Concrete.

Why Concrete is a Great Choice for Floors

Why Concrete is a Great Choice for Floors

You may just see concrete as a flooring option that is a pretty standard arrangement, one that places tend to opt for if they can’t think of a better choice. But some noteworthy reasons make concrete a great choice for flooring, it can elevate a stepping space to the next level… Let us take a look at 6 great benefits of concrete flooring and how it can transform the look of your property.

Strength 

If you know anything about the strengths of concrete, you will know that it’s a very durable mixture indeed. We’re talking about a material that can withstand very high volumes of weight, with strong pressure presenting no issues whatsoever. Heavy equipment and vehicles would not be enough to make a dent on a concrete floor. So a concrete floor can easily take all the foot traffic and moving of furniture that the average household is likely to take part in regularly without any issues!

Long-lasting

This durability means that the concrete will hold up and last for years to come. Especially if the concrete flooring is well looked after and sealed, you can expect it to last for a very long period before it becomes anywhere near being worn down. And even when the texture and colour begin to change with age, a long way down the line, that adds a bit of ‘character’ to the style of the flooring and is not a practical issue unless it actually becomes damaged in any respects.

Plenty of design options

Concrete does seem to be stereotyped as a boring flooring type, but that is quite unfair. Designers have come up with a wide range of options, with absolutely loads of different colour and textual effects to choose from. And don’t forget you can stain or paint the surface of concrete for your desired effects and also opt for other specialities such as polished concretes.

Reasonable 

If you’re cost-conscious, whether you’re looking to purchase domestic concrete or require flooring for office space, it remains one of the more economical options available. The clever aspect is that you can choose a faux floor pattern that resembles the style of a much more expensive flooring type for a fraction of the cost.

Easy to Maintain

Another big benefit of concrete is that it’s very easy to maintain. As mentioned, it will keep even better with a seal of some kind, a protective sealant that should be reapplied every 3-9 months on average. Regular sweeping and mopping will help keep the concrete looking fresh and new, but other than that, not much maintenance is required. Polishing your concrete is also a great way to keep it looking its best.

Good for Indoor and Outdoor

A final benefit of concrete flooring is it’s a reliable choice for both indoors and outdoors, so you can have it set up in your home or garden area.

You should enjoy selecting a great looking concrete flooring style, but there is also an alternative option. Consider hiring a mini concrete mixer which for a very small daily fee can produce your required amounts of concrete from the comfort of your garden! This can work out to be a very affordable way of getting the job done! So, for all your concrete needs, contact Base Concrete today on 01442 389105. For more details, visit our contact page.

The post Why Concrete is a Great Choice for Floors first appeared on Base Concrete.

The Many Uses of Concrete

The Many Uses of Concrete

Where would we be without concrete? It’s one of the most versatile and essential products for almost all construction projects across the world. It’s a substance that fills our world and can be seen in almost everything we see, but also one that is so easily overlooked.

There are so many uses for concrete. Its applications and uses are more varied and more widespread than you can imagine. There are over 20 different types of concrete that are used in a multitude of construction projects, but what are the most popular applications for it? What is it that makes concrete such an advantageous material to use, and how is it used in both domestic and commercial developments. Let’s take a look.

Origins of Concrete

Concrete, in one form or another, has been with us since 6500 BC. It can be traced back to what is now, the United Arab Emirates, where Nabataea traders created concrete floors, houses and even underground cisterns.

The Egyptians were using it to build the pyramids in 3000 BC, where they used mortars of lime and gypsum to create their version of cement. It was also used, not surprisingly perhaps, to help construct the Great Wall of China. It didn’t become concrete, at least what we recognise it as today, until the 1800s, but since then, its uses have grown more and more.

Buildings

For any of us living in a house or working in a building, it’s likely to be made from brick and mortar to some degree. In the UK, it took off after World War II as part of the rebuilding efforts. Nowadays, it’s probably the most popular application of concrete in the modern age and will be for centuries to come.

Foundation

Even if the building itself is more steel and glass, its foundations will be made from or secured in, concrete. Concrete is so popular because it won’t burn or rot, which means that the foundation is going to maintain its strength and rigidity for many years.

Roads and Bridges

As we move up in the world, the very streets you walk on and the bridges you use to cross those roads will also be made of concrete. Again, concrete wins against other materials because of its durability and safety. It might not be obvious, but another advantage of concrete in these environments is that it offers better reflectivity at night. Of course, it’s not just pedestrians it has to support, but because it can hold heavier weights, such as cars and trucks, it’s the perfect material to use.

Why Concrete has so Many Uses

The applications for concrete don’t stop there. They are only the start. Concrete is so popular in different projects simply because of its adaptability. It’s not sensitive to moisture, can be shaped and moulded into almost any design, affordable and is recyclable.

It has a very long lifespan, doesn’t release any dangerous organic compounds and is just as safe for inhabitants. It’s easy to forget the difference concrete has made to our world, but just look around and you’ll see that it’s everywhere.

Contact Us

Thank you for reading this blog post. Should you be looking for any mixes or perhaps ready mixed concrete itself, then we can deliver it straight to your door. So, if you have any upcoming tasks, then get in touch today on 01442 389105 or visit our contact page for more details.

The post The Many Uses of Concrete first appeared on Base Concrete.

The Different Types of Concrete Pumps

The Different Types of Concrete Pumps

Construction projects require a constant supply of concrete, and without it, the construction project will be impossible to complete. Construction projects are usually faced with the issue of how to efficiently handle a large quantity of concrete manually. To resolve this issue, the use of the different types of concrete pumps at construction sites was invented.

This invention made the handling and placing of large concrete easier. Concrete pumps also made the construction process of tall buildings, skyscrapers and large construction projects more organised and efficient. The market has different types of concrete pumps available according to the size of the construction projects. There are also many concrete services which allow concrete pumps to be hired.

The different types of concrete pumps used for the diverse construction project are cost-effective. During construction projects, it is very crucial to choose the right concrete pumps that are economical, efficient and one that is specifically designed for your particular construction project. Below are the different types of concrete pumps and their benefits.

Concrete Pumps can be categorised into boom pumps, concrete pumps trucks, stationary pumps and concrete line pumps.

Boom Pump

A boom pump is a type of concrete pump which is characterised by a controlled hydraulic arm where concrete is placed and dispersed accurately in the right direction where it’s needed. 

They’re usually attached to a truck. Boom pumps are normally used for huge construction projects. It can easily navigate any barrier on its way and provides the right portions and angles during the construction process.

It’s easy to manoeuvre a boom pump. And it can churn out a large amount of concrete at a fast speed. It’s highly recommended to use the boom pumps for large construction projects.

Stationary pump

The stationary pump, unlike boom pumps, is characterised by less manoeuvrability. It’s usually attached to a truck or mounted on a trailer and the concrete is pumped through rubber hoses or steel pipelines. Working with a stationary pump requires that the direction of the pipeline be directed to the particular portion where the concrete is needed.

Stationary pumps are known for pouring concrete at a slower speed than other types of pump. So it’s recommended where the demand for a smaller volume of concrete is required for a construction project.

Specialised Usage Pump

Specialised usage pumps are one of the different types of concrete pumps that are readily available. Specialised Usage Pumps are a premium option. They can be designed for special type of construction projects, such as construction projects in mines or tunnels.

Concrete Line Pumps

Concrete line pumps are usually referred to as a trailer-mounted concrete pump or truck-mounted concrete pump because of its arrangement. The arrangement features a line pump attached to the trailer or the back of the truck. They are compact and recommended for small construction projects.

When choosing the right type of concrete pumps for a particular construction project, factors like the design of concrete mix, vertical and horizontal distances, size of the aggregate being used, volume or quantity of concrete should be carefully considered. Thank you for reading this month’s blog. Should you have any queries or perhaps are looking for equipment to hire, call us on 01442 389105 or visit our contact page for more details.

The post The Different Types of Concrete Pumps first appeared on Base Concrete.