Study on the Effect of Mineral Powder and Fly Ash on Cement Hydration Heat

Abstract

In this paper, the hydration heat and hydration temperature-time curves of different proportions of cement, fly ash, mineral power, and fly ash and mineral power at different ages were studied. The results showed that compared with cement alone, fly ash and the heat of hydration of cement at different ages had been reduced, and the maximum temperature had been reduced to varying degrees. The maximum temperature time had been advanced compared to cement, and the reduction of the hydration heat of cement by pulverized coal was higher than that of pulverized coal. Ash reduced the heat of cement hydration. When cement was replaced by fly ash and mineral power in different proportions, the heat of hydration was also reduced, but the reduction was disproportionate. As the blending ratio increased, the degree of hydration of the cement decreased and the maximum temperature decreased. The reduction of hydration heat of fly ash was better than the end of the initial period, but the reduction of heat of hydration by mineral powder was not very obvious, but it can slow down the heat release rate of hydration heat significantly.