Pozzolanic action of Homra with lime

Pozzolanic activity of fired clay bricks (Homra) was studied using hydrated lime as an activator. Three different mixes of Homra/hydrated lime were hy drated in a paste form for various time intervals up to 90 days. The hydrat ion characteristics of the hydrated pastes were followed by thermal analysi s (TGA and DTA) at various times of hydration. The results obtained from th ermal analysis of the formed hydrates were related as much as possible to t he pozzolanic activity as determined by chemical analysis. The results indi cated that Homra, as a waste product of clay bricks industry, can be used i n the production of low cost filled pozzolanic cements.