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采用20目废旧橡胶颗粒等体积取代混凝土中细集料,掺量分别为0%、5%、15%、25%,研究其对混凝土力学性能的影响。结果表明:废旧橡胶混凝土的容重、抗压强度、抗折强度以及弯曲弹性模量均随橡胶颗粒掺量的增加而降低;坍落度随掺量的增加先增大后减小,但均较基准组大;折压比随掺量的增加先减小后增大;最大挠度较基准混凝土有所提高,说明废旧橡胶颗粒的掺入提高了混凝土的韧性。
Subsequent substitution of fine aggregates in concrete with volume of 20 mesh waste rubber particles at the volume of 0%, 5%, 15% and 25% respectively, the effect of concrete on its mechanical properties was studied. The results show that the bulk density, compressive strength, flexural strength and flexural modulus of waste rubbery concrete decrease with the increase of rubber particles. The slump first increases and then decreases with the increase of the content, The pressure-deflection ratio firstly decreases and then increases with the increase of the dosage. The maximum deflection is higher than that of the reference concrete, which indicates that the incorporation of waste rubber particles improves the toughness of the concrete.