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通过正交试验,研究了橡胶取代率、粒径两因素对橡胶自密实混凝土基本力学性能的影响。试验结果表明:橡胶自密实混凝土立方体抗压强度、劈裂强度均随橡胶取代率的增加而下降,随橡胶粒径增大而降低;橡胶自密实混凝土的拉压比随着橡胶掺入率的增加而增加,且粒径越小塑性越好;橡胶自密实混凝土抗水渗透性随取代率增加呈先上升后下降,且与橡胶粒径关系密切。通过对试验数据的统计回归,提出了修正的橡胶自密实混凝土立方体抗压强度与劈裂强度之间的关系公式。
Through orthogonal test, the influence of rubber substitution rate and particle size on the basic mechanical properties of rubber self-compacting concrete was studied. The test results show that the compressive strength and splitting strength of rubber self-compacting concrete cube decrease with the increase of rubber substitution rate, and decrease with the increase of rubber particle size. The compression ratio of rubber self-compacting concrete increases with the rubber blending rate Increase and increase, and the smaller the particle size, the better the plasticity. The water-resistant permeability of rubber self-compacting concrete first increases and then decreases with the increase of the substitution rate, and it is closely related to the rubber particle size. Based on the statistical regression of the experimental data, the formula of the relationship between the compressive strength and the splitting strength of the modified rubber self-compacting concrete cube is proposed.