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Types of concrete

Concrete can be classified according to their unit weight into ultra-lightweight concrete, lightweight concrete, normal weight concrete, and heavyweight concrete. ultra-light weight concrete can be used only to build non-structural members. Light weight concrete can be used to built structural and non-structural members. Using of lightweight aggregates helps in reducing the weight of concrete. Using of light of concrete will reduce the deadweight for a building or bridge, which in turn reduces the size of columns and foundation. Using lightweight concrete might be a potential cost reduction in construction projects. Normal weight concrete is very common, and we can find it in concrete structures everywhere around us. Normal weight concrete used almost in constructing everything, such as building, bridges, pavements, and other structures. Heavy-weight concrete used to build special structures such as laboratories, nuclear plants, and hospital examination rooms. Heavy-weight concrete will provide radioactive protection to minimize the influence of radioactive emissions on people's health. 

Figure 1

 On the other hand, concrete is classified according to compressive strength. Concrete categorized into low compressive strength, moderate compressive strength, high compressive strength, and ultra-high compressive strength. The low compressive strength has strength less than 20 Mpa, this type of concrete is used in road subgrade, partitions. Moderate compressive strength concrete has a strength range from 20-50 Mpa. This type of concrete used almost everywhere. It used to construct buildings, bridges, and similar structures. High compressive strength used to construct tall buildings, bridge towers, and shear walls. The compressive strength for this type ranges from 50-150 Mpa. Concrete with a compressive strength higher than 150 Mpa called ultra-high compressive strength concrete.

Also, Concrete can be classified according to additives added to improve concrete properties. fiber-reinforced concrete produced by adding fibers made from glass, carbon, and other materials to concrete mix. These fibers will improve concrete flexural strength, toughness, and shrinkage control. DSP is concrete that has been densified using small particles such as micro silica, fly ash, and other mineral admixtures. The using of these mineral admixtures will enhance concrete compressive strength and toughness. Also, it will reduce the permeability of concrete, which increases the durability. 


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