FUNDAMENTAL PROPERTIES OF FLY ASH CEMENT PREPARED WITH HIGH ALITE CEMENT

Abstract

In order to develop fly ash cement（type B）with equal strength to ordinary Portland cement（OPC）, a specific base cement was made. This cement had higher alite and f.CaO content, surface area compared to OPC, and contained different limestone powders. Fly ash cement made with base cement containing 5％ limestone powder was tested over 91 days（at 5℃, 20℃ and 30℃）and developed 92％ of the strength of OPC. As well, it was observed that this strength increasing effect of limestone powder was larger at 5℃ compared 20℃ and 30℃. The fly ash cement that was made also showed a setting time between regular cement and OPC. However, this was considered to be a result of the f.CaO contents effect on the cement. Finally, compare to OPC, the fly ash cement that was made had a lower hydration heat and higher fluidity.