Use and classification of lightweight aggregate concrete

Lightweight aggregate concrete refers to concrete with light aggregate and its apparent density is less than 1900kg/m3. The so-called light aggregate is the aggregate used for the purpose of reducing the quality of concrete and improving the thermal effect, and its apparent density is lower than that of ordinary aggregate. Artificial lightweight aggregate is also known as ceramsite. Lightweight aggregate concrete has the characteristics of light weight, high strength, heat preservation and fire resistance, and good deformation performance, low elastic modulus, shrinkage and creep in general.

Lightweight aggregate concrete is used in industrial and civil buildings and other projects, which can reduce the weight of the structure, save the amount of materials, improve the transportation and lifting efficiency of components, reduce the foundation load and improve the function of buildings, etc., suitable for high-rise and long-span buildings.

Aggregate classification:

Light aggregate concrete is divided into all light concrete and sand light concrete according to different fine aggregate. The use of light sand to do fine aggregate, known as all light concrete; By ordinary sand, or part of the light sand to do fine aggregate, called sand light concrete.

Classification of uses:

Light aggregate concrete is divided into heat preservation light aggregate concrete, structure heat preservation light aggregate concrete and structure light aggregate concrete according to its different uses in construction engineering. In addition, lightweight aggregate concrete can be used as heat resistant concrete instead of furnace lining. With natural porous light aggregate or artificial ceramsite as coarse aggregate, natural sand or light sand as fine aggregate, with Portland cement, water and admixture (or without admixture) according to the proportion requirements of the dry apparent density of the concrete is not more than 1950kg/m3.