What exactly is Foam Concrete and CLC Blocks?
CLC blocks consist 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 are expensive but they have some limitations. When compared to conventional concrete blocks, CLC blocks are more affordable and have a lower costs of capital. Additionally, they are more robust than concrete blocks of the conventional variety. But, the initial investment needed to begin one CLC plant is much lower than that of aerated plants.
What is foam concrete?
Foam concrete refers to a type of lightweight concrete which has at least 20% foam. It is also known also as Low Density Cellular Concrete, or lightweight cellular concrete. It is a slurry made of cement that must have at least 20% foam in order to qualify to be considered foam concrete. This type of concrete is an ideal option for construction projects of all kinds since it saves money on labor and cost.
This lightweight concrete has a compressive strength of 5-8 MPa with a density of around 1000 Kg/m3. It can be used to build a house because it provides strength as well as insulation. The concrete that is lightweight is usually produced using a mixture of fly ash or concrete, while other vendors will use only pure cement and water with foaming substances.
Another benefit for foam concrete is the fact that it doesn’t need to be compacted. The material is able to adhere to lines of the subgrade. In turn, it can be pumped over long distances, but with a very low pressure. It’s also extremely long-lasting and will not degrade. However, it has a higher price than regular concrete.
Another advantage with foam concrete that it can reduce the weight of structures by as much as 80%. Because of the air content of the material that is evenly all over the body of the material. The size of the air bubbles can vary from 0.1 to one mm. Its foam concrete density can range between 400 to 1600 kg/m3. It is a good level in fire resistance and it is an excellent thermal and acoustic insulator. Another advantage for foam concrete is the fact that it requires minimum compaction and no vibration.
Where are CLC blocks utilized?
Cellular Lightweight Concrete (CLC) blocks are superior to solid concrete blocks that are typically used. The lightweight bricks have lower density because of their low aggregate and cement content, and are better for thermal and sound insulation. Also, these bricks have wider shape and size than traditional clay bricks. In the past recycled plastic and glass scraps were used as cement additives to improve the compressive strength. It is crucial to remember that the particle size of glass must be less than 45 millimeters to be efficient as a substitute for cement.
Typically, CLC blocks are manufactured using a foaming ingredient that is combined with air and water. The mix is then dumped into molds. Once it has been poured, concrete mixture needs between 18 and 24 hours to set. In some instances steam curing is employed in order to shorten the curing time. This curing method also gives a more polished appearance.
CLC blocks are made of polypropylene micro fibers. They provide a solid alternative to clay bricks and is an ideal option for affordable housing. In addition, the polypropylene fibers enhance the performance of brick and masonry. The product that is created has a density of approximately 2.8 N/m2 which is much higher than that of typical brick or concrete.
CLC blocks also are environment sustainable. Because the blocks are constructed out of waste materials, they are free of hazardous chemicals and do NOT pollute the environment. In addition, they’re good insulators and lower the dead load of a building. They help save money on energy and construction materials for homeowners.
Density and strength of foam concrete
The strength and densities of foam concrete vary based on the type of material employed. The most common ingredient in foam concrete is cement and an aerogel. Due to its composition, foam concrete is prone to chemical shrinkage. To reduce this, the mixture is controlled by several layers of non-reactive powder concrete and mechanical connectors. The addition of additional materials to the mix to increase its stiffness and strength.
Temperatures that are high can cause cracks in concrete foam. The higher heat, greater cracks could occur. Concrete with an average density of 1000 kg/m3 has roughly one-sixth the thermal conductivity that is found in a normal concrete. Consequently, reducing the density reduces the heating conductivity by 0.04 W/mK.
Furthermore, because foamed cement is a brand-new material, there are no tests that are standard for it. In the end, the method of preparing the specimens and testing them was based in the same way as tests for ordinary concrete. For instance, the compression strength of the concrete was determined by PN-EN-12390-3:2011 plus AC:2012, whereas the elastic modulus was determined by reference to the Instruction to the Research Building Institute No. 194/98. Density of foam also identified using PN.EN. 12390-5.2011.
Strength and densities of the foam concrete is dependent on the amount of foam present in the mortar. The composition of the mortar is composed of low-mass aggregates like expanded clay, vermiculite, as well as pumice. The density of a concrete is vital because it can impact the strength of it, its permeability as well as thermal characteristics. The amount of admixtures in the concrete can also drastically change its properties.
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