沥青路面功能性预养护材料的养护时机研究  

Research on Maintenance Time for Functional Preventive Materials in Asphalt Pavement

作　　者：林俊涛[1,2] 吴少鹏[3] 刘全涛[3] 洪锦祥[1] 

机构地区：[1]江苏省建筑科学研究院有限公司,江苏南京210008 [2]东南大学交通学院,江苏南京210096 [3]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070

出　　处：《中国公路学报》2014年第9期19-24,共6页China Journal of Highway and Transport

基　　金：国家国际科技合作专项项目(2013DFE83100);江苏省交通科学研究计划项目(2013CD1)

摘　　要：为研究功能性预养护材料的养护时机以提高沥青路面预防性养护的效益，选择了3种道路沥青，以压力老化20，40，60，80h模拟沥青胶结料的长期老化；同时对湖北省内5条不同使用时间沥青路面中沥青胶结料进行回收，对比研究了室内模拟老化沥青及回收沥青流变开裂因子、羰基面积因子的变化规律。研究结果表明：流变开裂因子与沥青胶结料的延度具有显著的线性关系，通过流变开裂因子可预测实际路面中沥青胶结料的延度值；延度值5～8cm可作为路面老化开裂的临界值，并可据此得到相应的流变开裂因子与羰基面积因子范围，可为路面预防性养护时机选择提供参考。In order to improve the effectiveness of preventive maintenance for asphalt pavement, the optimal maintenance time of functional preventive maintenance materials in asphalt pavement was studied. Three kinds of asphalts were chosen and aged by 20, 40, 60 and 80 hours in pressure aging vessel to simulate the longterm aging of asphalt binder. Meanwhile, asphalt binders were recovered from five asphalt pavements located in Hubei province. Then, the change laws of rheology cracking index and carbonyl area index of both aged asphalt and recovered asphalt were studied. The results indicate that rheology cracking index has linear relationship with ductility of asphalt binder. The rheology cracking index can be used to predict the ductility of asphalt binder in actual pavement. The critical value of ductility related to cracking is defined as 5-8 cm, and the ranges of rheology cracking index and carbonyl area are determined. These two indexes can provide reference for the optimal preventive maintenance time for asphalt pavement.

关 键 词：道路工程 沥青路面 试验研究 长期老化 养护时机 功能性预养护材料 

分 类 号：U416.27[交通运输工程—道路与铁道工程]