Ordinary concrete is made of cement as admixture, sand and stone as coarse and fine aggregates, and mixed with water. Among all concrete families, ordinary concrete is the earliest and most widely used, and many kinds of concrete in the future are developed on its basis.

Its main features are as follows:

1) The compressive strength of concrete is relatively high, generally 20 ~ 50mpa, which can bear a large load.

2) Concrete has excellent plasticity before solidification, and can be made into various shapes and specifications as required.

3) It has very good service performance, and can withstand the transformation of dry and wet, cold and hot, freeze-thaw cycles in gas for a long time without being destroyed.