陶瓷再生集料沥青阻热面层性能的室内试验研究

The laboratory study on the performance of ceramic recycled aggregate for asphalt thermal resistance surface layer

采用导热系数相对较小的陶瓷再生集料等体积取代石灰岩集料制备陶瓷沥青阻热面层,以有效解决沥青路面高温稳定性问题。进行了陶瓷沥青混合料高温稳定性、力学性能、水稳定性、温度阻热性能研究。结果表明:当陶瓷再生集料掺量为60%时,沥青混合料的动稳定度为4893次/mm,浸水残留稳定度为90.6%,冻融劈裂强度比为90.1%,路用性能良好;相比普通沥青混合料,陶瓷再生集料掺量为60%时,试件上表面层与中面层温差从3.7℃增加到6.6℃,阻热降温效果显著。综合陶瓷沥青混合料的路用性能和阻热性能说明,陶瓷再生集料在沥青路面阻热面层中的应用具有可行性。

Use a relatively smaller thermal conductivity of ceramic recycled aggregate replace limestone aggregate in equal volume,develop ceramic asphalt thermal resistance surface layer to solve the problem of high temperature stability of asphalt pavement,the laboratory study of ceramic asphalt mixture is carried out,including mixture ratio design,high temperature stability,mechanical property,water stability and thermal insulation performance.The result indicates that:When ceramic recycled aggregate content is 60%,the dynamic stability of asphalt mixture is 4893 times/mm,the stability of the residual water is 90.6%,the ratio of freezing thawing splitting strength is 90.1%,the road performance of ceramic recycled aggregate asphalt mixture is good.When ceramic recycled aggregate content is 60%,compared with ordinary asphalt mixture,the temperature difference between the surface layer and the middle surface of the specimen increased from 3.7℃to 6.6℃,the effect of heat resistance and cooling is remarkable.The road performance and the thermal resistance performance of ceramic asphalt mixture is evaluated comprehensively,proving ceramic recycled aggregate asphalt mixture as asphalt thermal resistance surface layer is feasible.