Incorporation of Waste Materials into Portland Cement Clinker Synthesized from Reagent-Grade Chemicals

摘要

In this study, the feasibility of using waste materials to manufacture Portland cement was investigated. Reagent-grade chemicals were used to synthesize a Portland cement clinker with a tightly controlled composition. Then, calcium oxide-bearing waste materials, specifically fly ash and blast furnace slag, were combined with the reagent-grade chemicals. The synthetic cements were characterized using X-ray diffraction, scanning electron microscopy, and isothermal calorimetry. Results show that Portland cement can be successfully synthesized by replacing reagent-grade chemicals with up to 40% fly ash and 60% slag incorporation. These synthetic cements possess early-age hydration behavior similar to a commercial Type Ⅰ/Ⅱ Portland cement.