DEVELOPMENT OF “GREEN” CEMENT FOR SUSTAINABLE CONCRETE USING CEMENT KILN DUST AND FLY ASH

摘要

A research project was conducted to develop “green” cement for sustainable concrete using cement kiln dust (CKD) and Class F fly ash (FA). In the project, effects of mechanical, chemical and thermal activations on strength and other properties of CKD-FA binders were investigated. Different CKD-fly ash combinations, grinding equipment and methods, chemical additions, and elevated curing temperatures were considered. The set time, heat of hydration, and strength of CKD-fly ash pastes were evaluated. The hydration products and microstructure of the binder pastes were studied. The results indicate that when blend proportion and activation are properly applied, the binder made with CKD and fly ash will have satisfactory strength and performance, which provides potential applications for the new cementitious product.