基于SmartRock传感器测试的沥青路面振动压实试验研究

Experimental Investigation on the Compactness During Vibration Compaction of Asphalt Pavement Based on SmartRock Sensors

通过现场试验测试沥青混合料在振动压路机压实荷载作用下的动态响应规律,可以更合理地为制定压实工艺提供技术参考。文中设计现场试验方案,利用SmartRock传感器测试沥青路面在振动压实过程中的加速度响应;通过建立沥青混合料颗粒加速度峰值与碾压遍数关系开展各面层碾压过程的对比分析。结果表明,沥青混合料集料颗粒竖向加速度与压实遍数的拟合度最高;下面层混合料比中、上面层混合料吸收更多来自压路机的压实能,压实相对困难,在碾压施工中需要更多的压实遍数。

Compaction is the key process to guarantee the construction quality of asphalt pavement. Exploring the interaction mechanism and response law of aggregate particles of asphalt mixture is the basis for the optimization of vibration rolling process. Therefore, the dynamic response of asphalt mixture under the compaction load of vibratory roller is tested by field test, which can more reasonably formulate the compaction process and provide technical reference. Firstly, a field test scheme is designed to measure the acceleration response of asphalt pavement in the process of vibration compaction by using SmartRock sensor. Then, the relationship between the peak acceleration of asphalt mixture particle and the number of rolling times is established to carry out the comparative analysis of the rolling process of each surface course of pavement. The analysis shows that the fitting degree of vertical acceleration and compacting times of asphalt aggregate is the highest. The mixture of the lower layer absorbs more compaction energy from the roller than the mixture of the middle and upper layer, and the compaction is relatively difficult, so more compaction times are needed in the rolling construction.