【摘要】 通过贝雷法选择5种不同CA比的沥青混合料级配,对其进行马歇尔试验、粗集料松装空隙率试验、车辙试验和旋转压实试验,分析了CA比对沥青混合料各项性能的影响。结果表明:CA比对沥青混合料的空隙率、矿料间隙率、粗集料骨架的形成、抗车辙性能和压实性能具有显著影响;CA比在0.4~0.6之间的沥青混合料具有较好的稳定性;CA比同沥青混合料中整个集料骨架的形成之间并无较好的规律性关系。更多还原

【Abstract】 In order to reveal the influence of CA ratio on the performance of asphalt mixture, five kinds of asphalt mixture gradations with different CA ratio are selected by Bailey method to carry out Marshall test, the test of percent voids in the dry loose coarse aggregate, rut test and gyratory compactor test. The results show that CA ratio has a significant effect on percent air voids, VMA, formation of the coarse aggregate skeleton, rutting resistance and densification characteristics of asphalt mixture; when CA ratio lies between 0.4 and 0.6, the asphalt mixture has good stability; CA ratio has no regular relation with formation of the whole aggregate skeleton in asphalt mixture.10 tabs, 6 refs.更多还原