掺高效减水剂和粉煤灰混凝土性能试验研究

Research on proporties of concrete with superplasticizer and fly ash

对掺缓凝高效减水剂和粉煤灰的水泥水化热及混凝土的性能进行了试验,试验结果表明:掺缓凝高效减水剂可延缓水泥的早期水化热,掺加粉煤灰可显著降低水泥的水化热;掺缓凝高效减水剂、引气剂和I级粉煤灰,可显著降低混凝土的单位用水量,改善混凝土的和易性,提高混凝土的强度和耐久性。

The properties of concrete with superplasticizer and fly ash were studied.The results showed that the superplasticizer could reduce the rate of heat evolution at early age, and the fly ash could reduce the total hydration heat of cement, the use of super plasticizer, air entraining admix- ture and Class I fly ash could obviously reduce water content, improve workability of the mixture, and increase strength and durability of concrete.