大空隙率沥青混合料耐久性评价方法与指标  

Evaluation of Durability for Asphalt Mixture with Large Air Voids

作　　者：耿韩[1] 李立寒[1] 孟庆楠[2] 

机构地区：[1]同济大学道路与交通工程教育部点实验室,上海200092 [2]同济大学建筑设计研究院,上海200092

出　　处：《建筑材料学报》2011年第6期767-770,共4页Journal of Building Materials

基　　金：住房和城乡建设部科技项目(2008-R2-24)

摘　　要：设计了不同温度条件的肯塔堡飞散试验、浸水马歇尔试验和冻融劈裂试验,以探寻较为合理的、能够有效反映大空隙率沥青混合料抗松散性能、水稳定性能的评价方法和评价指标.结果表明:肯塔堡飞散试验可以用于评价大空隙率沥青混合料的抗松散性能与水稳定性能.建议以20℃飞散损失、-18℃冰冻飞散损失作为一般温度、冰冻条件下大空隙率沥青混合料的抗松散性能评价指标,以60℃浸水飞散损失作为其水稳定性能评价指标,以20℃飞散损失及60℃浸水飞散损失的变异系数不大于10%,-18℃冰冻飞散损失变异系数不大于20%作为耐久性指标的技术要求.Experiments including Cantabro loss test for specimens of different temperature,Marshall test of immersion,and freeze thaw split test were designed to obtain proper test methods for the evaluation of anti -scattering property and moisture sensibility of asphalt mixture with large air voids.Test results show that,Cantabro loss test is the proper experiment for this purpose.Furthermore,scattering loss at 20℃, frozen scattering loss at—18℃and soaking scatterrng loss at 60℃are suggested as evaluation index of anti-scatterng property in normal temperature state,anti-scattering property in frozen state and moisture sensibility respectively.The precision criterion for durability evaluation is that,the coefficient of variation of scattering loss at 20℃or soaking scattering loss at 60℃is no more than 10%,and that of frozen scattering loss at—18℃is no more than 20%.

关 键 词：道路工程 大空隙率沥青混合料 耐久性 评价方法 评价指标 

分 类 号：U414[交通运输工程—道路与铁道工程]