What is Foam Concrete and CLC Blocks
What exactly is Foam Concrete and CLC Blocks?
CLC blocks are made of foam concrete. In this article, we'll discover more about the different types of foam concrete, as well as where they can be used. We will also know about their density and strength. Aerated concrete blocks can be expensive and come with a few limitations. When compared to conventional concrete blocks, CLC blocks are more affordable and require less cost of capital investment. They are also more durable than conventional concrete blocks. The initial investment needed to begin one CLC plant is lower than the cost of aerated cement plants.
The foam cement is what?
Foam concrete refers to a type of concrete that is lightweight and contains at least 20 percent of foam. It is also known under the terms Low Density Cellular Concrete or the Lightweight Concrete. It is a cement-based slurry that has to contain at the least 20% foam before it can be considered as foam concrete. This kind of concrete is an excellent option for many construction projects as it will save on the cost of labor and materials.
This concrete lightweight has a compressive force of between 5-8 MPa and a density of around 1000 kg/m3. It is a great material to build houses because it is strong and provides insulation. The lightweight concrete is normally produced using a mixture of fly ash or cement, however, some vendors use pure cement and water with foaming ingredients.
Another benefit of foam concrete is that it does not require compacting. The material adheres to the shapes of the subgrade. Thus, it can be pumped for long distances using relatively little pressure. Also, it is extremely durable and is not decomposable. However, foam concrete tends to be more costly normal concrete.
Another advantage for foam concrete is that the material can reduce the weight of structures by up to 88%. Due to its air content and air bubbles, they are evenly all over the body of the concrete. The size of the air bubbles can vary between 0.1 to one millimeter. The density of foam concrete can range between 400 to 1600 kg/m3. It offers a high level of fire-resistance and is a good acoustic and thermal insulation. Another benefit associated with the foam is that the concrete requires little or no compaction.
Where are CLC blocks employed?
Cellular Lightweight Concrete (CLC) blocks have numerous advantages over regular concrete blocks. These lighter bricks have a lower density because of their low aggregate and cement content. They are also more effective in thermal and sound insulation. Additionally, they have a wider design and dimension than traditional clay bricks. In the past they used recycled plastics and glass wastes were employed as cement additives in order to increase the compressive strength. It is important to know that the size of the particles in glass should be less than 45 mm for it to be efficient as a cement substitute.
The majority of the time, CLC blocks are manufactured using a foaming ingredient that is mixed with air and water. This mixture is placed in molds. Once poured, the concrete mixture takes between 18 and 24 hours for it to cure. In some cases steam curing may be utilized in order to reduce the curing duration. This type of curing also can provide a better quality finish.
CLC blocks are made of polypropylene microfibers. The fibers offer a dependable alternative for clay bricks. They are a good choice for housing that is low-cost. Furthermore, polypropylene microscopic fibers improve the peak behaviour of masonry and bricks. The end product is characterized by the density of 2.8 N/m2 this is significantly higher than the normal brick or concrete.
CLC Blocks are ecologically friendly. Since the blocks are made out of waste materials, they are not contaminated by toxic chemicals and do not emit any pollutants to the environment. Additionally, they're great insulations and help lower the dead load of a building. They are a great way to save money on building materials and power bills for house owners.
Density and strength of foam concrete
The strength and density of foam concrete may vary based on the type of material used. Most commonly, foam concrete is made up of cement as well as an aerogel. Because of its composition foam concrete is susceptible to shrinkage in chemical form. To limit this, the mix is kept in check with 2 or 3 layers of physically reactive powder concrete and mechanical connectors. Further materials can be added to the mix in order to improve its strength and stiffness.
High temperatures can cause cracks in foam concrete. The greater your temperature rises, greater cracks can occur. A concrete sample having 1,000 kg/m3 density has roughly one-sixth the thermal conductivity of normal concrete. Accordingly, reducing its amount of density decreases the heating conductivity by 0.04 W/mK.
In addition, because foamed concrete is a brand new substance, there aren't standardized test methods for it. This is why the procedure of creating specimens and testing them was based in the same way as tests for normal concrete. For instance, the compression strength of the concrete was measured following PN-EN 12390-3, 2011 + AC:2012. Furthermore, the flexibility modulus was determined in accordance with the Instructions for the use of the Research Building Institute No. 194/98. Diet of the foam was calculated using PN EN 12390-5.
Density and strength of concrete made from foam is dependent on the proportion of foam present in the mortar. Its composition is composed of low-mass aggregates, such as expanded clay vermiculite, as well as pumice. The density of a concrete is significant because it will affect the strength, the permeability, and even its thermal performance. Amount of admixtures could dramatically alter the properties.
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