王德志1,2,孟云芳1,2,李田雨
纳米SiO2和纳米CaCO3改善混凝土抗冻性能试验
王德志1,2,孟云芳1,2,李田雨
摘 要:研究了纳米SiO2和纳米CaCO3对混凝土7d、28d和78d抗压强度、劈裂抗拉强度及混凝土抗冻性能的影响。试验结果表明,纳米SiO2能显著改善混凝土力学性能和抗冻性能,试验中最优掺量为2%;纳米CaCO3能显著改善混凝土劈裂抗拉强度和抗冻性能,但对抗压强度影响不显著,试验中最优掺量为3%。
Abstract: The concrete compressive strength, splitting strength and frost resistance mixed with SiO2 and CaCO3 nanoparticles were experimentally studied. Results indicated that the added nano-SiO2 improved markedly compressive strength, splitting strength and frost resistance, and the added nano-CaCO3 had obvious impacts on splitting strength and frost resistance as well as little effect on compressive strength. The optimal replacement levels of cement by SiO2 and CaCO3 nanoparticles for producing concrete were 2.0% and 3.0% respectively.
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