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通过对不同尺寸的混凝土试件进行巴西劈裂试验,研究了混凝土试件高径比对巴西劈裂试验结果的影响,确定了混凝土试件巴西劈裂试验的合理高径比。实验结果表明:混凝土试件在巴西劈裂试验过程中主要分为四种破坏模式。对于不同尺寸的混凝土试件,高径比为0.5或1.0的混凝土试件均可以通过巴西劈裂试验得到抗拉强度。然而,高径比为1.0的混凝土试件稳定性明显优于高径比为0.5的混凝土试件。在试件个数有限的情况下,建议采用高径比为1.0的试件进行混凝土巴西劈裂试验。
Through the Brazilian splitting test on concrete specimens of different sizes, the effect of concrete height-diameter ratio on Brazilian splitting test results was studied, and the reasonable aspect ratio of Brazil splitting test of concrete specimens was determined. The experimental results show that the concrete specimens are mainly divided into four kinds of failure modes during the Brazilian splitting test. For concrete specimens with different sizes, the tensile strength of concrete specimens with height-diameter ratio of 0.5 or 1.0 can be obtained by Brazilian splitting test. However, the stability of concrete specimens with height-diameter ratio of 1.0 is obviously better than that of concrete specimens with height-diameter ratio of 0.5. In the case of a limited number of specimens, it is recommended to use a specimen with a height-diameter ratio of 1.0 for the Brazilian Brazil splitting test.