强紫外光辐射地区的沥青混合料组成设计研究

Research on the Mix Proportion Design of Asphalt Mixture in Strong Ultraviolet Radiation Region

提出强紫外光辐射地区的沥青混合料材料设计设计方法,为该地区沥青路面的抗紫外光老化提供设计依据。采用AC-16的3种不同级配类型,通过马歇尔试验分别确定其最佳油石比。采用自制的紫外光老化实验箱,对不同级配的AC-16沥青混合料进行197 h(相当于自然光照4个月)的紫外光老化。对老化后的沥青混合料试件进行高温稳定性、低温抗裂性和回弹模量试验。得到结论是:AC-16S1高温稳定性较好,适宜于高温的强紫外光辐射地区,AC-16S0低温抗裂性好,适宜于低温的强紫外光辐射地区。

Put forward the asphalt mixture design method of material design in strong ultraviolet radiation region and provide reference to asphalt design for anti-ultraviolet aging. This paper adopts three different gradation type of AC-16,at the same level determined the optimum proportion by the Marshall test. Using self-made ultraviolet aging experiment box, make different gradation of AC- 16 197 hours（4 months natural illumination）ultraviolet aging. For aging asphalt mixture specimen, test their high temperature stability,low temperature crack resistance and resilience modulus. The result show that AC-16S1 is suitable for high temperature, strong ultraviolet radiation region for its good high temperature stability and AC- 16S0 is suitable for low temperature of the strong ultraviolet radiation region for its good low temperature crack resistance.