1. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha Hunan 410114, China;
2. Guangzhou Expressway Co., Ltd., Guangzhou Guangdong 510228, China
Inversion Effect of Asphalt Pavement with Two Courses of Semi-Rigid Base
TIAN Xiao-ge1, HAN Hai-feng2, LI Xin-wei2, WU Dong1, WEI Dong1
1. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha Hunan 410114, China;
2. Guangzhou Expressway Co., Ltd., Guangzhou Guangdong 510228, China
摘要To study the combination principles of structural design and material design in asphalt pavement with semi-rigid bases, the software BISAR3.0 was used to analyze the load responses in asphalt pavement with two layers of semi-rigid base courses, and its inversed structure. Then composite beam specimens composed of two kinds of cement-treated macadam with different cement contents were then fabricated, and four-point bending strength and fatigue tests were conducted. Results indicated that the lower semi-rigid base layer (lower base) undertakes greater tensile stress than the upper semi-rigid base layer (upper base), and the fatigue life of the pavement structure is dependent on the lower base. Therefore, using inferior materials for the lower base and superior materials for the upper base is unreasonable. The inversed structure can fully utilize each material, and its bearing capacity and fatigue resistance were considerably improved. Thus, pavement structural design should be combined with material design according to the tensile stress state in pavement layers.
Abstract：To study the combination principles of structural design and material design in asphalt pavement with semi-rigid bases, the software BISAR3.0 was used to analyze the load responses in asphalt pavement with two layers of semi-rigid base courses, and its inversed structure. Then composite beam specimens composed of two kinds of cement-treated macadam with different cement contents were then fabricated, and four-point bending strength and fatigue tests were conducted. Results indicated that the lower semi-rigid base layer (lower base) undertakes greater tensile stress than the upper semi-rigid base layer (upper base), and the fatigue life of the pavement structure is dependent on the lower base. Therefore, using inferior materials for the lower base and superior materials for the upper base is unreasonable. The inversed structure can fully utilize each material, and its bearing capacity and fatigue resistance were considerably improved. Thus, pavement structural design should be combined with material design according to the tensile stress state in pavement layers.
基金资助:Supported by National Natural Science Foundation of China (No.50878032)
通讯作者:
TIAN Xiao-ge
E-mail: tianxiaoge@126.com
引用本文:
田小革, 韩海峰, 李新伟, 吴栋, 魏东. 半刚性路面中双层半刚性基层的倒装效应[J]. Journal of Highway and Transportation Research and Development, 2018, 12(3): 22-27.
TIAN Xiao-ge, HAN Hai-feng, LI Xin-wei, WU Dong, WEI Dong. Inversion Effect of Asphalt Pavement with Two Courses of Semi-Rigid Base. Journal of Highway and Transportation Research and Development, 2018, 12(3): 22-27.
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2018, Vol. 12 
