Concrete is one of the most commonly utilized construction materials on the planet. Cement paste and inert elements are the two basic components of concrete blocks. Portland cement, water, and some air make up the cement paste. Fine aggregates such as sand and coarse aggregates such as gravel, crushed stone, or slag are commonly used as inert materials.
Source: https://coneccconcrete.com/blog/AAC-Blocks-Vs-Concrete-Blocks
