基于半圆弯曲试验的在役沥青路面抗裂性能评价方法研究

Research on Evaluation Method of Cracking Resistance of Asphalt Pavement in Service Based on Semicircle Bending Test CAI Haiquan ( 272 )

摘要:

针对在役沥青路面抗裂性能评价难题，采用半圆弯曲试验方法及临界应变能指标评价其抗裂性能，基于江苏省典型高速公路现场芯样开展了35组上面层半圆弯曲试验，并通过20%和80%分位临界应变能结果提出了在役沥青路面抗裂性能三级评价标准，不同等级临界应变能分级标准分别为0.3 kJ/m2和0.7 kJ/m2。

Abstract:

Aiming at the difficult problems of cracking resistance evaluation of asphalt pavement in service, the semicircle bending test method and the critical strain energy index are used to evaluate its cracking resistance. Based on the field core samples of a typical expressways in Jiangsu Province, 35 groups of semicircle bending tests of the upper layer are carried out, and a three-level evaluation standard for the cracking resistance of asphalt pavement in service is proposed through the results of 20% and 80% fractile critical strain energy. The classification criteria for critical strain energy of different grades are 0.3 kJ/m2 and 0.7 kJ/m2 respectively.