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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 high performance concrete, the compressive properties of concrete with different nano-Si 2 O 2 content and different basalt fiber content were tested for 28 d. The experimental results were analyzed and the mechanism was discussed. The results show that the incorporation of basalt fiber can improve the splitting tensile strength of concrete. When the dosage is 3 kg / m ~ 3, the splitting tensile strength is 8.71% higher than plain concrete. The incorporation of nano-Si 2 O 2 can improve the compressive strength of concrete. When the content of nano-Si 2 O 2 is 1.2%, the compressive strength of concrete increases 7.07%. When nano-Si 2 O 2 and basalt fiber were mixedly incorporated, the best effect was obtained when the content of nano-Si O 2 was 1.2% and the basalt fiber content was 3 kg / m 3, compared with the tensile strength and compressive strength Concrete increased by 17.42% and 9.04% respectively.