Lightweight aggregate concrete, also known as lightweight concrete, refers to structural lightweight concrete with a strength grade of LC15-LC60, made by mixing lightweight coarse aggregate (ceramic particles), ordinary sand, cement, and water. Lightweight aggregate concrete has the characteristics of light weight, high strength, thermal insulation, earthquake resistance and impermeability. Compared with ordinary concrete of the same grade, it can reduce the weight by more than 20-30%.
Lightweight aggregate concrete is widely used in industrial and civil buildings, as well as other engineering projects, which can reduce the structural weight; Improve the seismic performance of the structure; Save material usage; Improve the efficiency of component transportation and lifting; Benefits such as reducing foundation loads and improving building functions (insulation, fire resistance, etc.). Therefore, in the 1960s and 1970s, the production and application technology of lightweight aggregate concrete developed rapidly, mainly in the direction of lightweight and high strength, and was widely used in high-rise, large-span structures and enclosure structures, especially in the production of small hollow blocks for walls. China has been developing lightweight aggregate and lightweight aggregate concrete since 50 years ago, mainly used for large exterior wall panels and small hollow blocks in industrial and civil buildings, with a small amount used for load-bearing structures and thermal structures in high-rise and bridge buildings