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what is lightweight concrete

These concrete blocks are available in 3.6 N/mm² and 7.3 N/mm² strengths and weigh less than 20kg. Structural lightweight concrete is defined as having a 28 day compressive strength in excess of 2,500 psi and a unit weight ranging from 85 or 90 pcf to 115 pcf. The most common example of this type of concrete is known as autoclaved aerated concrete. Ordinary concrete is quite heavy and its density is 2300 kg/m3. with a lightweight aggregate (expanded clay, shale or slate) to reduce the overall weight of the piece. The lightweight aggregates are relatively new materials. Lightweight concrete can be defined as a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional qualities such as nailbility and lessened the dead weight. Lightweight concrete 1. Method A, … Aerated concrete is a product that is produced by adding different types of ingredients known as constituents to the overall mix that trigger a chemical reaction and lead to the formation of gas bubbles within the concrete as it cures. Due to lightweight and high strength to mass ratio their use results in lesser steel consumption. Each design encapsulates the insulation board in insulating concrete. Lightweight-concrete is defined by BS EN 206-1 as having an oven-dry density of not less than 800 kg/m 3 and not more than 2000 kg/m 3 by replacing dense natural aggregates either wholly or partially with lightweight aggregates. 1. The special characteristics of cellular lightweight concrete are obtained by controlling the density which affects properties like strength, modulus of elasticity, thermal conductivity, porosity, weight, etc. For the making of lightweight concrete, we can use industrial waste which is suitable and easily available. These have a unit weight up to 12 kN/m3. Density of this concrete is considerably low 300kg/m3 to 1850kg/m3) when compared to normal concrete. You can divide concrete into two classes, lightweight and heavyweight, based on the type of aggregate it contains. Lightweight concrete is a special concrete whose weight is lighter than conventional concrete, the density of this concrete is much lower density {300 kg / m3 to 1850 kg / m3) than normal concrete. The density of lightweight concrete in the range between 300 to 1850 Kg/cum and the average concrete density 2200 to 2500 Kg/cum. Concrete is a mixture known for its durability and compressive strength. Lightweight Concrete is particularly suitable for use where low density, good thermal insulation, or fire protection are required but not all of the available aggregate are equally suitable for any particular application. Lightweight concrete is weak in the protection of reinforcement from corrosion. Modern finishing methods have expanded the uses of concrete to include products such as kitchen countertops and finished interior flooring. As far as radiant systems go, the denser the medium the tubing is set in, the more efficient the system is.. The reduced quantity of concrete and steel reinforcement offsets the marginally higher cost of lightweight concrete floor systems. Most of the lightweight concrete mix is made with lightweight aggregates.Lightweight concretes strengths are generally in the range of 0.3 N/mm2(44 psi) to 40 N/mm2( 5800 psi) and cement content in the range of 13 lb/ft3 (200 kg/m3). High-efficiency insulation materials (such as polystyrene material, slag, rice husk, perlite, and foam insulation materials) are used as filling materials in the holes of hollow blocks. Note that though the density is the same there is a difference in design for all-lightweight vs sand-lightweight concretes. 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