what is meant by foam concrete?

Question

light weight and less dense.

Answer 1

Lightweight foam concrete is normally made from mixing a stable foam to slurry of cement, sand & water. This action incorporates small-enclosed air bubbles within the mortar thereby making it lighter and possessing special properties such as low thermal conductivity and high fire resistance. Its density ranges from as low as 500kg/m3 to as high as 1600kg/m3 therefore allowing it to be used in a variety of applications such as pre - cast wall blocks and panels, floor & roof screeds, trench reinstatement, road foundations and void filling.

Answer 2

just concrete that expands is all