Study for Improvement of Blast-Furnace Slag Cement Type A using Additional Binders to Improve Durability and Reduce Environmental Impact

Abstract

Considering global warming, reducing the carbon dioxide emissions of the cement industry is a pressing issue. One approach is to replace ordinary portland cement with blast-furnace slag cement type A (BA). However, BA offers inferior resistance to ASR and penetrating chloride ion compared with blast-furnace slag cement type B (BB). In the aim to improve the durability, environmental impact and strength of BA, this study proposes a new cement obtained by adding fly ash and limestone powder to BA to achieve the same level of ASR resistance performance as BB. Further, the mechanism of penetration and immobilization of chloride ion in cement hydrated products are studied.