Foam Concrete (FC) is made by mixing foam into mortar. The mortar is a cement mix with sand and water. As a result you end up with a mix that is lighter than “normal” concrete. The mass, or density as we call it here, (weight per cubic meter) depends on how much foam is added to the mortar. The more foam we add the lighter it is, but also the weaker is becomes. The “Ideal” mix would have at least 20 MPa at a density of 1000 Kg/m3, however the best results I have found in studies was 18 MPa and a density of 1200Kg/ m3. A simple FC with no additives is usually around 5-8 MPa with a density of 1000 Kg /m3. There are FC “Brands” on the market that make the claim to be better than this.

The lighter the FC is, the better the thermal insulation becomes. The combination of the strength and the insulation value makes FC an ideal building material.  For the advantages and dis-advantages of FC go to:  Why Foam Concrete is an ideal building material