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将橡胶掺量与粒径作为变量,探讨了橡胶颗粒对环氧树脂混凝土力学性能与变形特性的影响。运用等体积代砂的方法,分别以不同砂替代比(5%,10%,15%)对比研究橡胶颗粒不同掺量与不同粒径(平均粒径分别为0.5,1.5,4 mm)对环氧树脂混凝土非标准试件的抗压强度、劈裂强度、抗折强度与变形特性的影响。结果表明:随着橡胶掺量的增加,环氧树脂混凝土各项力学性能均有不同程度的下降,并且随着掺量增加,力学性能下降程度没有呈现增大的趋势;平均粒径在1.5 mm的中粒径橡胶颗粒对力学性能降低程度最小同时变形性能较好。同时通过弯拉试件应变与挠度的测试结果发现:相对于基准对照组的环氧树脂混凝土,橡胶的加入使环氧树脂混凝土破坏时呈现明显的的塑性变形后产生延性破坏,弯曲韧性增强,同时环氧树脂混凝土的弯拉极限应变得到大幅度提高。
The influence of rubber particles on the mechanical properties and deformation characteristics of epoxy resin concrete was discussed with rubber content and particle size as variables. By means of equal volume of sand replacement, the effects of different dosages and different particle sizes of rubber particles (0.5, 1.5 and 4 mm, respectively) on the ratio of different sand substitution ratios (5%, 10%, 15% Influence of compressive strength, splitting strength, flexural strength and deformation characteristics of oxygen resin concrete nonstandard specimens. The results show that with the increase of rubber content, the mechanical properties of epoxy resin concrete all decrease to some extent, and with the increase of dosage, the decrease of mechanical properties does not show an increasing trend. The average particle size is 1.5 mm Of the medium particle size rubber particles to reduce the extent of the least mechanical properties while deformation performance is better. At the same time, the results of strain and deflection test of bending specimen show that ductility damage, ductility and toughness increase when epoxy resin concrete is damaged due to the addition of rubber to the epoxy resin concrete of the reference control group. At the same time, the ultimate bending strain of epoxy resin concrete has been greatly improved.