期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 162, 期 -, 页码 892-897出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.12.157
关键词
Pavement evaluation; Semi-rigid base cracking; Nondestructive evaluation; Falling weight deflectometer; Modulus back-calculation
资金
- National Natural Science Foundation of China [51678443, 51508411, 71471134]
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. (C) 2017 Elsevier Ltd. All rights reserved.
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