Abstract: 2 groups of specimens were molded in laboratory (with and without short-term aging procedure) and 2 groups of core samples were drilled from pavement (constructed in normal and rain condition). And then the volume parameters and split resilient modulus (5 temperature levels and 6 frequency levels) of the above 4 groups of specimens were tested by the AC-20 mixture split resilient modulus master curve generated by time-temperature equivalent principle, and the master curves of these four groups of specimens at 20℃ were compared and analyzed. The results show that it is feasible to simulate the mixing and heating process of asphalt mixture for aging of asphalt by short-term indoor accelerated aging test; the splitting resilient modulus of mixtures will be less sensitive and dependent on loading frequency with the increase of loading frequency; if the asphalt mixture encounters rain weather in construction process, the volume parameters of mixture will meet the requirements of specification, but there will be much decrease of split resilient modulus and mechanics performance; according to sigmoidal model of split resilient modulus,when the temperature is 20℃ and loading frequency is 10Hz, the mixture split resilient modulus will decrease by 42.5%. Therefore, it is suggested that the weather changes in asphalt mixture construction process should be paid close attention to and the mixing floor production status should be adjusted timely; meanwhile, it should be guaranteed to immediately stop the construction when rain condition is encountered.

Key words: highway engineering, pavement quality, construction in rain, split resilient modulus, volume parameters;

摘要： 室内成型2组试件 （经历和未经历短期老化）、路面钻取2组芯样（正常施工、遇雨施工），对4组试件的体积参数和劈裂回弹模量（5个温度水平、6个频率水平）进行检测 ，采用时-温等效原理生成AC-20混合料劈裂回弹模量主曲线，并对4组试件20 ℃主曲线进行对比分析。研究表明，采用室内短期加速老化试验模拟拌和楼 加热拌和过程对沥青的老化是可行的；随着加载频率的增大,混合料劈裂回弹模量对加载频率的敏感性和依赖性降低；沥青混合料施工过程突遇下雨天气 ，体积参数虽能够满足规范要求，但混合料劈裂回弹模量大幅降低，力学性能下降；由劈裂回弹模量西格摩德模型知，混合料劈裂回弹模量（20 ℃温度 ，10 Hz加载频率）降低42.5%。建议，对于沥青混合料施工过程应密切关注天气变化，及时调整拌和楼生产状态，突遇下雨工况保证立即停止施工。

关键词: 道路工程, 路面质量, 下雨施工, 劈裂回弹模量, 体积参数