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What is Foam Concrete and CLC Blocks

What is Foam Concrete and CLC Blocks?

CLC blocks are composed of foam concrete. In this article we will understand the various forms of foam concrete as well as the places they can be used. We will also know about their density and strength. Aerated concrete blocks are expensive and come with some limitations. Contrary to conventional concrete blocks, CLC blocks are more affordable and have a lower cost of capital. They are also more robust than concrete blocks of the conventional variety. However, the initial investment required to establish the CLC plant is lower than that of aerated concrete plants.

Which is the foam-concrete?

Foam concrete is a type made of lightweight concrete, which contains a minimum of 20% foam. It is also referred to as Low Density Cellular Concrete or Light-weight Cellular Concrete. It is a slurry made of cement which must have at least 20% of foam to be considered a foam concrete. This kind of concrete is an ideal alternative for many construction projects as it helps save on labor costs and other expenses.

This lightweight concrete has compressive strength of between 5 and 8 MPa with a density of about 1000 kg/m3. It is a great material to build houses because it offers both strength and insulation. The lightweight concrete is typically constructed using a mix of cement or fly ash, unlike other brands that use pure cement , water and an ingredient that foams.

Another advantage with foam concrete is that it doesn't need to be compacted. It adheres to the surface contours and lines that the subgrade. It can be pumped over long distances with very little pressure. It's also very strong and will not degrade. However, foam concrete will cost more money than normal concrete.

Another advantage from foam concrete is that they can reduce the weight of structures by as much as 80percent. Because of the air content of the material air bubbles are evenly spread throughout the concrete. The size of these air bubbles can range between 0.1 to one mm. Its foam concrete density is between 400 and 1600 kg/m3. It offers a high level of fire resistance , and is an excellent thermal and acoustic insulator. Another advantage to foam concrete is it needs minimum compaction and no vibration.

Where are CLC blocks employed?

Cellular Lightweight Concrete (CLC) blocks are superior to regular concrete blocks. These lighter bricks have a lower density because of their aggregate and cement amount, and also are better in thermal and sound insulation. They also have a larger shape and size than traditional clay bricks. In previous studies recycled plastic and glass wastes have been used as cement additives in order to increase the compressive strength. It is imperative to realize that the particle size of glass should not exceed 45 millimeters for it to function as a cement substitute.

The majority of the time, CLC blocks are manufactured with a foaming agents that is mixed with air and water. The mixture is pouring into molds. Once it has been poured, concrete mixture requires between 18 - 24 hours to become hard. In some instances steam curing can be used to speed up the curing process. This type of curing gives a more polished look.

CLC blocks are constructed of polypropylene microfibers. The fibers offer a dependable alternative to clay bricks , and are an ideal option for affordable housing. In addition, the polypropylene fibers improve the performance of brick and masonry. The end product is characterized by an approximate density of 2.8 N/m2 that is more than the average brick or concrete.

CLC Blocks can be described as ecologically sustainable. Since they are made from waste materials they are not contaminated by hazardous chemicals and do NOT emit any pollutants to the environment. Furthermore, they are great insulators , and they help reduce the dead load on the building. They help reduce the cost of construction materials and energy bills for house owners.

the strength and density of foam concrete's strength and density

The strength and density of foam concrete could depend on the type of material employed. The most common ingredient in foam concrete is cement as well as an aerogel. Because of its composition foam concrete is susceptible to chemical shrinkage. To prevent this, the mixture is contained by two or more layers of reactive powder concrete and mechanical connectors. Other materials can be added to the mix in order to improve the stiffness and strength.

The high temperatures can cause cracks in foam concrete. The greater the temperature, the more cracks are likely to occur. A concrete slab with 1000 kg/m3 of density is about one-sixth of the thermal conductivity that is found in a normal concrete. Thus, reducing density reduces the heat conductivity to 0.04 W/mK.

In addition, because foamed concrete is a new material, there aren't tests that are standard for it. Therefore, the method of preparing the specimens and testing their properties was based off procedures to test ordinary concrete. For instance, the compression strength of the concrete was determined as per PN EN 12390-3:2011 AC:2012, while the degree of flexibility was measured as per the Instructions for the use of the Research Building Institute No. 194/98. It was measured using PN-EN 12390-5:2011.

Density and strength of concrete made from foam are dependent on the amount of foam present in the mortar. Its composition is composed of low-mass aggregates such a clay that has been expanded, vermiculite, and pumice. The density of concrete is vital because it may affect the strength and permeability, and even its thermal performance. The quantity of admixtures used can dramatically alter the properties.

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