A nondestructive evaluation method for semi-rigid base cracking condition of asphalt pavement

作者：Zang, Guoshuai; Sun, Lijun^*; Chen, Zhang; Li, Li

来源：Construction and Building Materials, 2018, 162: 892-897.

DOI：10.1016/j.conbuildmat.2017.12.157

• Pavement evaluation
• Semi-rigid base cracking
• Nondestructive evaluation
• Falling weight deflectometer
• Modulus back-calculation

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.

• 出版日期2018-2-20
• 单位同济大学