Abstract: In order to accurately predict the combination of compaction process parameters required for cement emulsified asphalt mixture pavement to achieve the target compactness, the numerical simulation and pavement compaction test were combined to carry out the research, which was based on the time-varying rheological characteristics of the mixture compaction and the compaction Bodner-Partom (B-P) constitutive model. Firstly, B-P material model was obtained by secondary development of ANSYS. Then, the B-P model parameters with periodic changes were substituted into the compaction combination simulation analysis. Finally, the pavement compaction test was carried out and the optimization combination of compaction process parameters was furtherly obtained. Numerical simulation results show that three combinations of low-frequency, high-amplitude and high-speed are obtained from the simulation results. With effect of the three combinations, the vertical strain value of the mixture decreases greatly along the direction of the wheel width, and the attenuation amplitude values of the vertical strain value of the mixture at the road depth of 6 cm are all small. The attenuation amplitude value of combination 6 is the smallest, and the target forming thickness of the road surface can be controlled below 7 cm. The pavement compaction test shows that the effective compaction energy of combination 6 (6 times of low-frequency, high-amplitude, and high-speed compaction) is relatively high. The number of compaction times of combination 6 should be optimized to 5 times of low-frequency, high-amplitude, and high-speed compaction as well as 2 times of high-frequency, low amplitude, and high-speed compaction.

Key words: highway engineering; cement-emulsified asphalt mixture; the time-varying rheological characteristics of compaction; B-P constitutive model parameters; pavement compaction process parameter combinations

摘要： 为了精准预测水泥乳化沥青混合料路面达到目标密实度所需的压路机压实工艺参数组合，基于该混合料压实流变时变特性及压实Bodner-Partom（B-P）本构模型，采用数值仿真和路面压实试验相结合的方法开展研究。首先对ANSYS进行二次开发得到B-P材料模型，然后将阶段性变化的B-P模型参数代入压实组合仿真分析中，最后开展路面压实试验，进一步得到压实工艺参数优化组合。数值仿真研究结果表明：由仿真结果得到3个低频高幅高速组合，3个组合作用后沿轮宽方向的混合料竖向应变值减小幅度均较大，在路面深度6 cm处的混合料竖向应变衰减幅度值均较小，其中组合六的衰减幅度值为最小，路面目标成型厚度可控制在7 cm以下。路面压实试验表明，组合六（低频高幅高速压实6遍）的有效压实能量偏大，应将组合六的压实遍数优化为：低频高幅高速压实5遍+高频低幅高速压实2遍。

关键词: 道路工程；水泥乳化沥青混合料；压实流变时变特性；B-P本构模型参数；路面压实工艺参数组合