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.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2010年第1期119-122,共4页
Journal of Harbin Institute of Technology
关键词
沥青混合料
动水压力
动水作用
低温抗裂性
asphalt mixture
dynamic water pressure
dynamic water effect
low-temperature anti-cracking performance
