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研究了不同掺量短切玄武岩纤维对轻骨料混凝土的抗压强度、劈裂抗拉强度和抗折强度三种力学性能的影响。结果表明,掺入玄武岩纤维的轻骨料混凝土的7d抗压强度随纤维掺量的增加而增大,但对28d抗压强度没有显著影响,当纤维掺量超过0.15%时,28d抗压强度呈下降发展趋势;随玄武岩纤维掺量的增加,轻骨料混凝土的劈裂抗拉强度及抗折强度均呈先增加后降低的发展趋势,当纤维掺量为0.15%时,上述两种强度指标均取得最大值;玄武岩纤维掺入轻骨料混凝土中能够改善其脆性,增加其韧性,改善轻骨料混凝土的受压破坏形态和抗折破坏形态。
The effects of different content of chopped basalt fiber on the mechanical properties of lightweight aggregate concrete under compressive strength, splitting tensile strength and flexural strength were studied. The results show that the 7d compressive strength of lightweight aggregate concrete with basalt fiber increases with the increase of fiber content, but has no significant effect on the 28d compressive strength. When the fiber content exceeds 0.15%, the compressive strength at 28d The splitting tensile strength and the flexural strength of the lightweight aggregate concrete firstly increase and then decrease with the increase of basalt fiber content. When the fiber content is 0.15%, the above two kinds of strength The indexes all achieved the maximum value. The basalt fiber incorporates into the lightweight aggregate concrete can improve its brittleness, increase its toughness, and improve the compression damage form and the fracture resistant form of the lightweight aggregate concrete.