Effect of Fly Ash and Silica Fume on Hydration Rate of Cement Pastes and Strength of Mortars
Effect of Fly Ash and Silica Fume on Hydration Rate of Cement Pastes and Strength of Mortars
复制标题
粉煤灰和硅粉对水泥浆体水化速率和砂浆强度的影响
DOI：
10.1007/s11595-014-1072-7
复制
发表时间：
2014-12-01
影响因子：
1.6
通讯作者：
Zhang Bing
中科院分区：
文献类型：
--
作者：
Liu Jun;Zhang Yun;Zhang Bing
研究了粉煤灰和硅灰对水泥早期水化速率和强度的影响。采用对比试验研究了复合胶凝体系的水化速率。结合力学强度，研究了粉煤灰和硅灰对复合胶凝材料水化过程的影响。随着粉煤灰掺量的增加，水化放热速率峰值和强度峰值降低;随着硅灰掺量的增加，水化放热速率峰值和强度峰值明显增加。当粉煤灰和硅灰掺量分别为10%和5%时，水化放热速率峰值最大。7天抗折强度和抗压强度最高，分别为8.89 MPa和46.52 MPa。粉煤灰和硅灰是影响水泥水化速率和力学性能的主要因素。
The effect of fly ash and silica fume on hydration rate and strength of cement in the early stage was studied. Contrast test was applied to the complex cementitious system to investigate the hydration rate. Combined with mechanical strength, the influence of fly ash and silica fume during the hydration process of complex binder was researched. The peak of the rate of hydration heat evolution and the mechanical strength decreased as the ratio of fly ash increased, however, as the ratio of silica fume increased, the peak of the rate of hydration heat evolution and the mechanical strength increased obviously. When the ratios of fly ash and silica fume are 10% and 5%, the peak of the rate of hydration heat evolution is the highest. At the same time 7 days of flexural and compressive strength are the highest as 8.89 MPa and 46.52 MPa, respectively. Fly ash and silica fume are the main factors affecting the hydration rate and the mechanical property.