粉煤灰与磷矿渣对水泥水化热及胶砂强度的影响

Influence of fly ash and phosphorus slag on hydration heat and mortar strength of cement

试验研究了单掺粉煤灰和复掺磷矿渣与粉煤灰(PF料)对水泥水化热及水泥胶砂强度的影响,结果表明:水泥水化热随粉煤灰和PF料掺量的增大而降低;与纯水泥相比,掺粉煤灰或PF料的水泥7 d水化热降低百分率均低于掺合料(粉煤灰、PF料)替代水泥的百分率;复掺PF料的胶砂抗压强度比单掺粉煤灰高,且PF料对延迟放热峰值出现时间比粉煤灰好。

The influence of fly ash and a combined admixture of fly ash and phosphorus slag on hydration heat and mortar strength of cement was studied through testing. The results show that the hydration heat decreases with increasing content of fly ash and combined admixture of fly ash and phosphorus slag. With fly ash and combined admixture of fly ash and phosphorus slag, the reduced percentage of cement hydration heat after seven days is lower than the content in mineral admixtures. Compared with fly ash only, the combined admixture of fly ash and phosphorus slag can improve the strength of cement mortar, and the effect of delaying the exothermic peak of cement is much better.