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通过实验研究了活性粉末混凝土的基本力学性能(抗压强度、劈拉强度和抗折强度),分析了钢纤维掺量对活性粉末混凝土力学性能的影响,拟合得到了抗折强度与劈拉强度之间的关系表达式。在实验分析的基础上,建立了不同钢纤维体积含量活性粉末混凝土受压应力-应变全曲线的数学表达式。研究结果表明:钢纤维体积含量在1.0%~3.5%之间时,活性粉末混凝土的抗压强度、劈拉强度和抗折强度均随着钢纤维掺量的增加而增大;当钢纤维体积含量超过3.5%后,活性粉末混凝土抗压强度下降,劈拉强度略有提高,而抗折强度仍有明显的提高。
The basic mechanical properties (compressive strength, splitting tensile strength and flexural strength) of the reactive powder concrete were experimentally studied. The influence of the steel fiber content on the mechanical properties of the reactive powder concrete was analyzed. The flexural strength and splitting tensile strength The relationship between the intensity of expression. Based on the experimental analysis, the mathematical expressions of the stress-strain full curves of the activated powder concrete with different volume contents of steel fiber were established. The results show that the compressive strength, splitting tensile strength and flexural strength of reactive powder concrete increase with the increase of steel fiber content when the volume fraction of steel fiber is between 1.0% ~ 3.5%. When the steel fiber volume When the content exceeds 3.5%, the compressive strength of the reactive powder concrete decreases, the splitting tensile strength slightly increases, and the flexural strength is still significantly improved.