Fatigue Performance of Bridge Deck Pavement Materials

• 作 者: 吴少鹏
• 机 构: Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education, Wuhan Univers
• 出 处: Journal of Wuhan University of Technology(Materials Science
• 发表日期: 2009年02期
• 关键词: fatigue bending pavement gradation stiffness asphalt limiting criterion AASHTO b

Three beam samples of bridge deck pavement were prepared, with gradation types of AC-13, and AC-16 and combined AC-13+AC-16. Four-point bending test was adopted to investigate the fatigue performance of these beam samples. The experimental results indicate that the initial bending stiffness is related to the type of beam sample and testing temperature. Fatigue life of these samples decreases as the increase of the controlled strain level. The AC-13 beam sample exhibits better fatigue resistance and bigger limiting bending strain at the given strain level and temperature. Compared with single beam sample, the fatigue performance of combining beam sample is relatively poor.

Three beam samples of bridge deck pavement were prepared with gradation types of AC-13, and AC-16 and combined AC-13 + AC-16. Four-point bending test was adopted to investigate the fatigue performance of these beam samples. experimental results indicate that the initial bending stiffness is related to the type of beam sample and testing temperature. Fatigue life of these samples decreases as the increase of the controlled strain level. The AC-13 beam sample exhibits better fatigue resistance and greater limiting bending strain Compared with single beam sample, the fatigue performance of combining beam sample is relatively poor.