纳米SiO2和玄武岩纤维增强混凝土压拉强度的试验研究

Experiment Research on Compressive and Tensile Strength of Nano-SiO_2 Concrete with Basalt Fiber

为制备高性能混凝土,对不同纳米Si O_2掺量和不同玄武岩纤维掺量的混凝土进行了28 d压拉性能试验研究;并对试验结果进行分析与机理探讨。结果表明:掺入玄武岩纤维能提高混凝土的劈裂抗拉强度,掺量为3 kg/m^3时劈裂抗拉强度较素混凝土提高8.71%。掺入纳米Si O_2能提高混凝土的抗压强度,掺量为1.2%时较素混凝土提高7.07%。纳米Si O_2和玄武岩纤维复合掺入时,当纳米Si O_2掺量为1.2%、玄武岩纤维掺量为3 kg/m^3时效果最好,劈裂抗拉强度、抗压强度相较于素混凝土分别提高17.42%和9.04%。

In order to prepare the high performance concrete,compressive and tensile experiments with different nano-Si O2 and different basalt fiber for 28 d were carried out. The results were analyzed and the mechanisms were discussed. The study results indicated that adding basalt fiber could improve the resistance to splitting strength of concrete,when the mixing content was 3 kg / m^3,the strength could increase by 8. 71%. Adding nano-Si O2 could improve the compressive strength of concrete,when mixing content was 1. 2%,the strength could increase by7. 07% compared with the plain concrete. When the nano-Si O2 value was 1. 2% and the basalt fiber value was 3kg / m^3,the effect of basalt fiber concrete would be better and the splitting tensile and compressive strength could increase by 17. 42% and 9. 04% compared with the plain concrete individually.