动水作用对沥青混合料低温抗裂性的影响  

Influence of dynamic water on the anti-cracking performance of asphalt mixture at low temperature

作　　者：谭忆秋[1] 李晓琳[1] 胡斌[2] 

机构地区：[1]哈尔滨工业大学交通科学与工程学院,哈尔滨150090 [2]华南理工大学道路工程研究所,广州510640

出　　处：《哈尔滨工业大学学报》2010年第1期119-122,共4页Journal of Harbin Institute of Technology

摘　　要：为了研究动水作用对沥青混合料低温抗裂性能的影响,将动水作用引入试验,利用自行开发的模拟实际沥青路面受动水作用的室内实验装置,提出了荷载、水、温度三者共同参与的动水作用试验方法.从沥青标号、级配类型、空隙率3种因素出发,对7种沥青混合料动水作用前后的低温抗裂性能进行研究.研究表明,动水作用对沥青混合料的低温抗裂性存在不利影响.不同因素下,影响的程度有差异.对于空隙率为10%的混合料,其低温抗裂性能受动水作用的影响程度最高;在最不利的空隙率10%下,骨架结构的沥青混合料低温性能受动水影响比悬浮结构的要小;粘度大的沥青制成的混合料其低温抗裂性能受动水作用的影响较大.In order to research the influence of dynamic water on the anti-cracking performance of asphalt mixture at low temperature,this paper introduces the dynamic water effect into the test,develops a laboratory test device for simulating the asphalt pavement affected by dynamic water,and puts forward a test method of dynamic water effect working together with load,water and temperature.Based on this method,the anti-cracking stability at low temperature of seven kinds of asphalt mixture is studied with consideration of asphalt grade,gradation type and air voids.Results show that the dynamic water can take adverse effect on the stability of asphalt mixture at low temperature.For the mixture with 10% air voids,the influence of the dynamic water effect is the most.The performance of the mixture with skeleton structure is better than that with suspended structure at the air voids less than 10%,and the mixture made of high-viscosity asphalt is largely affected by the dynamic water effect.

关 键 词：沥青混合料 动水压力 动水作用 低温抗裂性 

分 类 号：U414[交通运输工程—道路与铁道工程]