Utilization of ceramic wastes as pozzolanic materials

摘要

The possible applicability of ceramic waste powder as partial portland cement replacement in concrete production is studied in this paper. The cement industry is responsible for about 7% of all CO_2 generated and the cost of cement represents more than 45% of the concrete cost. Several byproducts are used as portland cement replacement. In this research, the use of two wastes ceramic and two portland cements was analyzed. The replacements in weight were of 8, 16, 24, 32, and 40%. The chemical and mineralogical compositions of raw materials, were determined using XRF and XRD analysis. For the all blended cement, the pozzolanic activity, the heat realesed rate and and the hydrated compounds identification by XRD were determined. The results showed that both ceramic wastes have pozzolanic activity with both portland cements.