• Title/Summary/Keyword: 장수명

Search Result 300, Processing Time 0.03 seconds

Performance Evaluation of perpetual Asphalt Pavements Using an Accelerated Pavement Tester (포장가속시험기를 이용한 장수명 아스팔프포장의 공용성 평가 연구)

  • Song, Seo-Gyu;Lee, Jung-Hun;Lee, Hyun-Jong;Hwang, Eui-Yoon
    • International Journal of Highway Engineering
    • /
    • v.7 no.3 s.25
    • /
    • pp.1-10
    • /
    • 2005

  • In this study, accelerated pavement tester(APT) was performed on long-life asphalt pavements that can save maintenance and user costs by increasing the design life twice longer than conventional asphalt pavements. Basic material testings are first conducted on a high modulus base(HMB) mixture developed in this study. Four different pavement sections including thin and thick conventional and thin and thick HMB courses are constructed to compare the load-carrying capacities and to investigate the fatigue and rutting performances using an accelerated pavement tester. Tensile strain values at the bottom of base courses under the various loading levels are measured. The tensile strain values of the HMB sections are lower than those of the conventional sections. It is observed from the APT performed on the thin pavement sections that no significant cracks are developed up to the 180,000 cycles of a wheel load. In terms of rutting, only 3mm of rutting is developed in the thick HMB section while 5.3mm of rutting is developed in the thick conventional section at the 90,000 cycles of the wheel load. The HMB material developed in this study can be successfully used in the long-life asphalt pavements because of its excellent fatigue and rutting performances. It is estimated from a series of structural analysis that the use of the HMB material instead of the conventional base materials may reduce the asphalt thickness at least 5cm because of its better load-carrying capacity.

  • PDF