lightweight foam concrete (LWFC) is an insulated construction material that can be used to construct various kinds of buildings and structures. This cellular lightweight concrete consists of a cement base with many microscopic air bubbles distributed uniformly inside the mix. The bubbles are induced by a chemical air entraining agent to form a highly porous material which is very useful as a concrete for insulation purposes. This material has low self-weight, a minimal consumption of aggregate, high flowability and good thermal insulation properties.

This study investigated the engineering properties such as density, consistency, stability, compressive and splitting tensile strengths of lightweight foamed concrete with ceramic tile waste powder (CTW) as partial cement replacement materials. The LWFC was prepared with 0%, 25%, and 50% replacement of CTW in the cement matrix. The results showed that the strength increases with increasing CTW percentage in the mixtures.

It was found that the water/cement ratio has a large influence on the final properties of the foamed concrete. The optimum w/c was determined by using a high quality super-plasticizer with a sand to cement ratio of 10:2.

Foam concrete has an oven dry density of about 75lb/cuft and is not buoyant, reducing the need for heavy equipment for pouring. It also can be pumped to elevated locations, making it possible to use the material in areas where conventional concrete would be too costly or impractical. Foam concrete is especially suitable for backfilling voids around pipes and sewer systems, and in underground construction like road trenches. It can also be used to fill voids and reinforce foundations and bridge piers.