作　　者： ; ;

机构地区： 东南大学交通学院

出　　处： 《公路》 2006年第12期151-156,共6页

摘　　要： 为评价高温和重载对沥青混合料变形特性的影响,对AC-20级配的沥青混合料进行三轴重复荷载蠕变试验研究。结果表明:沥青混合料的变形随温度或应力水平的增大而迅速增大,且高温和重载同时作用会相互促进变形的发展;指标流变次数FN和斜率b均可以较好地反映沥青混合料的高温性能,但是对于高温重载同时作用情况,斜率b或许更合适;指标截距a和永久应变pε不适于评价沥青混合料的高温性能。 Triaxial repeated load creep tests are employed to evaluate the influence of high temperature and heavy load on the deformation property of AC-20 asphalt mixture. The results indicate that the deformation of asphalt mixture ascends with the increase of temperature or stress level, and it would be accelerated in the condition of high temperature and the simultaneous high stress level. Both flow number FN and slope b could reflect the high temperature stability of asphalt mixture, and slope b seems to be more suitable inhigh temperature and heavy load. The experiments also show that intercept a and permanent strain εp are improper to estimate the high temperature characters of asphalt mixture.

关 键 词： 沥青混合料 三轴重复荷载蠕变试验 高温 重载 流变次数

领　　域： [交通运输工程]