酸雨对沥青混合料路用性能的影响研究  

Study on Influence of Acid Rain on Pavement Performances of Asphalt Mixtures

作　　者：冯新军[1] 唐雄[1] 熊旭[1] 

机构地区：[1]长沙理工大学电力与交通安全监控及节能技术教育部工程研究中心,长沙410114

出　　处：《武汉理工大学学报》2015年第6期39-43,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51078046);湖南省自然科学基金(12JJ3050);智能电网运行与控制湖南省重点实验室项目

摘　　要：为了研究酸雨对沥青混合料路用性能的影响规律,采用两种pH值(pH=2,pH=4)的酸雨溶液和一种pH=7的自来水,对3种岩性(石灰岩,玄武岩,花岗岩)集料的沥青混合料进行周期浸泡加速腐蚀试验,然后对酸雨腐蚀后的沥青混合料分别进行车辙试验、小梁弯曲试验及冻融劈裂试验。结果表明:经不同pH值的酸雨溶液浸泡后,沥青混合料的高温稳定性、低温抗裂性及水稳定性均明显下降,且随着pH值的变小和浸泡周期的增加其下降幅度增大。但经pH=7的自来水浸泡后,沥青混合料高温稳定性、低温抗裂性和水稳定性下降幅度均很小。In order to study the influence rules of acid rain on the pavement performances of asphalt road,two kinds of solutions such as pH=2solution and pH=4solution were prepared as acid rain and a kind of tap water with pH=7was adopted.Three kinds of asphalt mixtures with crushed limestone,crushed basalt and crushed granite respectively were treated by using periodical immersion accelerated corrosion method,then the experiments of high temperature rutting,low temperature bending and freeze-thaw splitting were carried out.The experimental results showed that under the periodical immersion influence of acid rain solutions,high temperature stability,low temperature cracking resistance and water stability of the asphalt mixtures decreased with the decrease of solution pH value and the increase of immersion period.However,tap water with pH=7had little influence on high temperature stability,low temperature cracking resistance and water stability of the asphalt mixtures the asphalt mixtures,which all drop only slightly.

关 键 词：酸雨 沥青混合料 腐蚀 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]