基于加速加载的环氧沥青混凝土道面轮辙特性

Characteristics of Epoxy Asphalt Pavement Rutting Based on Accelerated Pavement Test

摘要:

对华东某军用机场试验段4种道面在60℃下展开加速加载试验，研究其轮辙变形特性.通过4种道面轮辙变形发展特性对比分析，探究环氧沥青混凝土道面的最大轮辙变形、轮辙变形速率、轮辙变形面积及其隆起比.结果表明：在高温下，环氧沥青混凝土道面具有较好抑制下卧层隆起和应力扩散能力，其抗轮辙性能明显优于SMA道面；环氧沥青混凝土道面轮辙变形发展可分为4个阶段；在加载前期，环氧沥青混凝土道面轮辙凹陷面积大于隆起面积，但加载到一定次数后隆起面积大于凹陷面积；轮辙隆起比与道面结构有关，环氧沥青混凝土道面初期的隆起比较小，加载后快速增大，但达到055时保持不变，建议环氧沥青混凝土道面隆起比为055.

Abstract:

Accelerated loading test was carried out to investigate characteristics of pavement rut deformation under the condition of 60℃ at a military airport test section in East China. Rut deformation development characteristics of four kinds of pavement structures were contrasted and analyzed to explore the rut deformation value, deformation rate, deformation area and uplift deformation ratio of epoxy asphalt pavement. Test results show that the epoxy asphalt concrete has good mechanical properties and high temperature stability. It has good inhibition layer uplift and the stress diffusion ability, and its anti rutting performance is better than SMA pavement under the condition of high temperature. The rutting development of epoxy asphalt pavement can be divided into four stages according to the maximum deformation properties of rut. In so far as epoxy asphalt pavement, sag area is greater than the uplift area in the early stage of loading, but uplift area is greater than the sag area after a certain numbers of loading; uplift ratio is related to pavement structure and uplift ratio coefficient is small in the early but rapidly grows after loading. When coefficient reaches 055 then remains unchanged, the uplift ratio coefficient of epoxy asphalt pavement is suggested to be 055.