A nondestructive evaluation method for semi-rigid base cracking condition of asphalt pavement
A nondestructive evaluation method for semi-rigid base cracking condition of asphalt pavement
复制标题
DOI：
10.1016/j.conbuildmat.2017.12.157
复制
发表时间：
2018-02
期刊：
影响因子：
--
通讯作者：
Guoshuai Zang;Lijun Sun;Zhang Chen;L. Li
中科院分区：
文献类型：
--
作者：
Guoshuai Zang;Lijun Sun;Zhang Chen;L. Li
半刚性基层开裂状况评价是工程等级路面评价的重要内容之一，多年来一直是路面工程师面临的关键挑战。这是因为半刚性基层的开裂情况只能通过目测得到，除非将沥青层铣掉，因此无损检测和评价方法是一种较好的选择。提出了一种基于FWD的半刚性基层开裂状态无损评价模型。结果表明，归一化模量（反算模量与初始模量之比）与半刚性基层开裂状态在双对数尺度上具有良好的相关性，可以作为半刚性基层开裂状态的合理评价指标。通过对高速公路路面实测数据与反算模量的对比，建立了路面模量的评价标准。
The evaluation of semi-rigid base cracking condition is one of the most important elements of project-level pavement evaluation, and has been a key challenge facing pavement engineers for many years. This is because that the semi-rigid base cracking condition cannot be obtained through visual surveys unless the asphalt course is milled off, therefore the nondestructive detection and evaluation method is a better choice. This paper develops a nondestructive FWD-based evaluation model to evaluate the semi-rigid base cracking condition. It was found that the normalized base modulus (ratio between back-calculated and initial modulus) and the semi-rigid base cracking condition had good relationship on log-log scales, therefore the normalized base modulus was considered to be a reasonable indicator for the evaluation of semi-rigid base damage (cracking) condition. Based on the comparison of measured data and back-calculated modulus in freeway pavements, the evaluation criterion is established.