

Concrete is the main construction material worldwide. The cement production is well known to significantly contribute to the world carbon dioxide emission, around 7% of the global green-house gas produced annually. Worldwide the replacement of cement by supplementary cementing materials has been used as a step to reduce the consumption of cement quantities in concrete mixtures. Geopolymer concrete represents a new alternative in making concrete by utilizing materials mainly composed of silica and alumina which could be alkali-activated to form a CaO-free alumino-silicate binder. Different materials were used in producing geopolymer concrete such as fly ash, metakaolin and slag. The ceramic industry produces significant amount of ceramic waste powder. The ceramic waste powder is characterized by its high percentage of silica (SiO2) and alumina (Al2O3), which is more than 70%. It represents a potential material to be utilized in making geopolymer concrete. In this study, ceramic waste powder was used in a preliminary investigation to produce geopolymer concrete. The study investigated the effect of using sodium hydroxide as alkali activation solution, the pH concentration of the alkali solution (i.e. 8M, 10M, 12M, 14M and 16M) and applying curing temperature of 60oC. Compressive strength, water absorption, electrical resistivity and microstructure of the produced geopolymer were investigated. Preliminary results showed that ceramic waste powder represents a very good potential to be used in producing cementless concrete.