| Title |
An Evaluation of Moisture Sensitivity of Asphalt Concrete Pavement Due to Aging |
| Authors |
김경남(Kim, Kyungnam) ; 김유석(Kim, Yooseok) ; 김낙석(Kim, Nakseok) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.4.0523 |
| Keywords |
포트홀;아스팔트 콘크리트 포장;노화;부착강도;박리저항성 Pot-hole;Asphalt concrete pavement;Aging;Adhesion performance;Anti stripping performance |
| Abstract |
Pavement distress and traffic accidents are caused by pot-hole. In addition, direct and indirect damages of road users are increasing, such as loss of life due to personal injury and damage to vehicles. Generally, the asphalt concrete pavements are continuously aging from the production process to the terminal performance period. Aging causes stripping due to cracks and moisture penetration and weakening the pavement structure to induce pot-hole. In this study, adhesion performance and moisture sensitivity were evaluated according to aging degree in order to investigate the effect of aging on asphalt pavement. As a result of the study, the viscosity of the asphalt binder was increased with aging and the bond strength of the aged was increased 2~3 times than that of the unaged. The results of accelerated aging test showed an increases in indirect tensile strength and the increase in the TSR (Tensile Strength Ratio) by 4.2~8.9 %. As a result, it is noted that the anti-stripping and adhesion performances of the aged asphalt concrete are improved compared to the unaged one under the aging conditions of asphalt binder coated on aggregates. |