橡胶颗粒沥青混合料低温抗裂性能的研究

在普通AC-20沥青混合料基础上,掺入废旧轮胎橡胶颗粒,并采用抗弯拉强度和最大弯拉应变指标对其低温性能进行评价。试验结果表明,抗弯拉强度越高,材料抵抗破坏的能力就越强,低温时收缩应力的能力也越强,沥青混合料的低温抗裂性能越好。最大弯拉应变越大,表明沥青混合料在低温下能够承受的应变越大,沥青混合料的低温抗裂性能就越好。因此,采用低温弯曲试验来评价掺橡胶颗粒的沥青混合料的低温抗裂性能是合理的。

Study of low temperature anti-cracking performance of granulated crumb rubber asphalt mixture

On the base of general AC-20 asphalt mixture,mixed with waste tire crumb rubber particles,and evaluate its low temperature performance with the index of flexural tensile strength and the largest flexure tensile strain.Test results showed that the higher the flexural tensile strength,the better of material ability to resist damage,at the same time,the ability of the low temperature shrinkage stress get stronger,the low temperature anti-cracking performance of asphalt mixture is better.The greater the largest...