橡胶混凝土的抗冲击性能研究

Research on Shock Resistance of Rubber Concrete

以C30和C50强度等级的混凝土为基准,选取粒径为1～3、3～6 mm的橡胶颗粒,分别按照10%、15%(砂的体积分数)掺量等体积取代部分砂配制橡胶混凝土,对不处理、水洗处理、NaOH处理、复合处理等改性方式的橡胶混凝土抗冲击性能进行了试验,研究基准混凝土强度等级、橡胶颗粒掺量和粒径、改性方法对混凝土抗冲击性能的影响。结果表明:橡胶颗粒虽然降低了混凝土的抗压强度,但提高了其抗冲击性能;初裂冲击次数和终裂冲击次数随着基准混凝土强度等级的提高、橡胶颗粒掺量和粒径的增大而增大;各种橡胶颗粒改性方法均可提高混凝土的抗压强度和抗冲击性能,其中复合处理方法效果最好。

Based on the concrete with C30 and C50 strength grades and selecting the rubber particles with a particle size of 1-3 and 3-6 mm, the rubber concrete was prepared by replacing the partial sand with 10% and 15% （volume fraction of sand）. The anti-impact performance of rubber concrete under the conditions of without treatment, washing treatment, NaOH treatment and compound treatment was tested. It studied the influence of strength grade, particle size and content of rubber particles and the modification method to the anti-impact performance of concrete. The results show that although the rubber particles have reduced the compressive strength of concrete, but it has improved its anti-impact performance; initial cracking and ultimate cracking impact number of times increase with the increase of benchmark concrete strength grade, the particle size and content of rubber particles; the modification method of rubber particle can improve the compressive strength and anti-impact performance of concrete, of which, the compound treatment method has the best effect.