陈 杰,袁进科
陈杰,袁进科.纳米Al2O3协同硅灰对水泥基材料性能影响试验研究[J].混凝土与水泥制品,2020(7):16-20.
CHEN Jie,YUAN Jin-ke.Experimental Study on Effect of Nano-Al2O3 and Silica Fume on Properties of Cement-based Materials[J].China Concrete and Cement Products,2020(7):16-20.
纳米Al2O3协同硅灰对水泥基材料性能影响试验研究
陈 杰,袁进科
陈杰,袁进科.纳米Al2O3协同硅灰对水泥基材料性能影响试验研究[J].混凝土与水泥制品,2020(7):16-20.
CHEN Jie,YUAN Jin-ke.Experimental Study on Effect of Nano-Al2O3 and Silica Fume on Properties of Cement-based Materials[J].China Concrete and Cement Products,2020(7):16-20.
摘 要:利用超细致密体系原理,在水泥净浆中外掺硅灰和纳米Al2O3以改善普通硅酸盐水泥灌浆材料早期强度低、凝结时间长等性能。研究结果表明,单掺纳米Al2O3对强度提高不大,但加入碱性激发剂会促进纳米Al2O3的水化反应,提高早期强度,缩短凝结时间。此外,纳米Al2O3和碱性激发剂协同硅灰可以大幅提高早期强度,与净浆相比,复合浆体的1 d、3 d、7 d抗压强度最高提高了145%、132%、75%,凝结时间最高缩短了43%。
Abstract: Ordinary portland cement has the characteristics of low early strength, long setting time and low stone rate, therefore, using the principle of ultra-fine and dense system, silica ash and nano-Al2O3 were added to the cement paste to improve the mechanical properties of the cement matrix. The results show that the single-doped nano-Al2O3 has little improvement in strength. The addition of alkaline activator can promote the hydration reaction of nano-Al2O3, improve the early strength and shorten the setting time. In addition, the nano-Al2O3 and alkaline activator synergistic silica fume can greatly improve the early strength. The 1 d, 3 d and 7 d compressive strengths of the composite paste are up to 145%,132% and 75% higher than those of the compressive strength of cement paste, the maximum reduction of the setting time is 43%.
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州