| Title |
Establishment of Failure Criteria of Repeated Direct Tensile Test to Evaluate Reflective Cracking Resistance of Asphalt Concrete Pavement |
| Authors |
이봉림(Lee, Bong Lim) ; 김낙석(Kim, Nakseok) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.6.1109 |
| Keywords |
반사균열;반복직접인장시험;파괴기준;포장두께 Reflective cracking;Repeated direct tensile test;Failure criteria;Pavement thickness |
| Abstract |
There are various test methods for evaluating the reflective cracking resistance of asphalt concrete pavement. Repeated direct tensile test is cheap and simple compared to the other traditional experimental methods. Determination of failure criteria is needed to apply a repeated direct tensile test. Various methods were used to determine the number of failure of repeated direct tensile test. The number of failure was defined as the time to reach 10% of the initial load, this method can be satisfied with specified tolerance of 10%. When the thickness of specimen is increased to 50 mm from 30 mm, the failure number is increased by 13.6 times. Thus, this result shows that the thickness of pavement is a big influence on the reflective cracking resistance. Reflective cracking resistance of asphalt concrete is decreased according to the increase in opening displacement. The repeated direct tensile test can be used as a reflective cracking resistance factor in pavement design, because it can evaluate the reflective cracking resistance according to the pavement thickness, opening displacement, material properties etc. |