•  
  •  
 

Abstract

To study the influence of different subgrade types on the low-temperature shrinkage performance of asphalt pavement, this paper designed two kinds of asphalt pavement combination structures for the semi-rigid subgrade and flexible subgrade: AC-16+cement-stabilized gravel and AC-16+asphalt-stabilized gravel. Strain gauges were attached at the center of the sides of the two materials and at the characteristic positions of the interfaces between the layers, and the resistance strain gauge measurement method was employed to carry out the temperature shrinkage test of the combined structure and thus obtain the strain changes at each position during the cooling process, with the influence of the subgrade type on the low-temperature shrinkage performance of the surface layer analyzed. Specifically, the test temperatures were -30–20℃, with every 10℃ as a temperature range. The results show that at the same temperature, the strain value of the flexible subgrade at each characteristic position is very close to the asphalt surface layer, with the absolute difference between the two being 3.1%. The temperature shrinkage of the asphalt surface layer corresponding to the flexible subgrade is closer to the free state of the monolithic deformation. In each temperature range, the constraint strain of the flexible subgrade on the asphalt surface layer is reduced by an average of 76.7% compared with the semi-rigid subgrade structure. With the decreasing temperature, the average interlayer strain difference increases, with the interlayer strain difference of the flexible subgrade structure much smaller than that of the semi-rigid subgrade structure. The results well explain the difference in the low-temperature shrinkage capacity of asphalt pavement layers under different subgrade types, which can provide better theoretical support for asphalt pavement structures in cold regions.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.012

First Page

75

Last Page

79

Submission Date

March 2025

Reference

[1] 叶向前, 邹晓翎, 何虹霖, 等. 半刚性基层沥青路面低温开裂成因研究综述[J]. 中外公路, 2020, 40(4): 62-67. YE Xiangqian, ZOU Xiaoling, HE Honglin, et al. Review on cause of low temperature cracking for semi-rigid base asphalt pavement[J]. Journal of China & Foreign Highway, 2020, 40(4): 62-67. [2] ZHANG W G, KHAN A R, SHEN S H, et al. Laboratory validation of surface-initiated transverse cracking of asphalt pavement[J]. Applied Sciences, 2020, 10(3): 1002. [3] 马士宾, 徐文斌, 刘昊杨, 等. 半刚性基层沥青路面结构可靠性分析[J]. 中外公路, 2017, 37(6): 77-80. MA Shibin, XU Wenbin, LIU Haoyang, et al. Reliability analysis of semi-rigid base asphalt pavement structure[J]. Journal of China & Foreign Highway, 2017, 37(6): 77-80. [4] 朱磊, 李强. 基于不同基层沥青路面长期性能观测与分析[J]. 中外公路, 2016, 36(6): 60-63. ZHU Lei, LI Qiang. Observation and analysis of long-term performance of asphalt pavement based on different bases[J]. Journal of China & Foreign Highway, 2016, 36(6): 60-63. [5] 张怀志, 杨帆, 杨野. 不同类型水泥稳定碎石温缩系数对比试验[J]. 沈阳建筑大学学报(自然科学版), 2020, 36(2): 323-329. ZHANG Huaizhi, YANG Fan, YANG Ye. Temperature shrinkage coefficient comparative test of cement stabilized macadam with different types[J]. Journal of Shenyang Jianzhu University (Natural Science), 2020, 36(2): 323-329. [6] PAN R, LI Y M. Effect of warm mix rubber modified asphalt mixture as stress absorbing layer on anti-crack performance in cold region[J]. Construction and Building Materials, 2020, 251: 118985. [7] HONG R B, WU J R, CAI H B. Low-temperature crack resistance of coal gangue powder and polyester fibre asphalt mixture[J]. Construction and Building Materials, 2020, 238: 117678. [8] 冉武平, 凌建明, 谷志峰. 环氧沥青混合料低温性能及评价指标[J]. 西南交通大学学报, 2017, 52(5): 935-942. RAN Wuping, LING Jianming, GU Zhifeng. Low temperature performance and evaluation index of epoxy asphalt mixture[J]. Journal of Southwest Jiaotong University, 2017, 52(5): 935-942. [9] 宋健民, 曾力, 白鹏飞. 基于数值分析法对沥青路面低温缩裂纹的研究[J]. 公路工程, 2016, 41(2): 37-43+52. SONG Jianmin, ZENG Li, BAI Pengfei. Study on low temperature shrinkage cracking of asphalt pavement based on numerical analysis[J]. Highway Engineering, 2016, 41(2): 37-43+52. [10] 李明, 李昶, 刘继华, 等. 粗集料及界面特性对水泥稳定碎石温缩抗裂性能影响性分析[J]. 公路, 2019, 64(10): 1-7. LI Ming, LI Chang, LIU Jihua, et al. Effect of coarse aggregate and interfacial characteristics on crack resistance in temperature shrinkage of cement-stabilized macadam[J]. Highway, 2019, 64(10): 1-7. [11] 刘鹏飞, 杨刚, 梁乃兴. 柔性基层和半刚性基层沥青路面有限元对比分析[J]. 公路交通技术, 2013, 29(4): 28-31. LIU Pengfei, YANG Gang, LIANG Naixing. Finite element comparative analysis for asphalt pavement with flexible base course and semi-rigid base course[J]. Technology of Highway and Transport, 2013, 29(4): 28-31. [12] 尹传军, 程培峰, 周西棚. 柔性基层结构在寒区公路的适用性分析[J]. 低温建筑技术, 2013, 35(9): 124-126. YIN Chuanjun, CHENG Peifeng, ZHOU Xipeng. Applicability analysis of flexible base structure in highway in cold area[J]. Low Temperature Architecture Technology, 2013, 35(9): 124-126. [13] 刘凯, 徐晓美, 张磊, 等. 动态荷载作用下半刚性沥青路面动力响应研究[J]. 森林工程, 2019, 35(2): 82-86+92. LIU Kai, XU Xiaomei, ZHANG Lei, et al. Research on dynamic response of semi-rigid asphalt pavement under dynamic load[J]. Forest Engineering, 2019, 35(2): 82-86+92. [14] 白琦峰, 钱振东, 吴春颖. 基于实测验证的沥青路面力学模型研究[J]. 公路交通科技, 2011, 28(5): 39-43. BAI Qifeng, QIAN Zhendong, WU Chunying. Study on asphalt pavement mechanical model based on calibration of measurement[J]. Journal of Highway and Transportation Research and Development, 2011, 28(5): 39-43.

Download

Share

COinS