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作者:

Jiao, Yubo (Jiao, Yubo.) (学者:焦峪波) | Zhang, Yao (Zhang, Yao.) | Zhang, Mengsu (Zhang, Mengsu.) | Fu, Liuxu (Fu, Liuxu.) | Zhang, Lidong (Zhang, Lidong.)

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摘要:

Fracture behavior of asphalt mixture due to load and environment conditions is associated with the service life of asphalt pavement. Characterization of fracture modes in asphalt mixture is a challenging topic, especially for pervious asphalt (PA) with non-uniform gradation and large air void (VV). The purpose of this study was to demonstrate the fracture modes of PA under compression and splitting based on acoustic emission (AE) monitoring. Uniaxial compression testing, splitting testing and AE monitoring were carried out simultaneously on cylinder PA specimens. AE parameters including average frequency (AF) and rise angle (RA) were obtained and used to characterize the variations of fracture modes with load levels. Fracture modes were classified and interpreted through correlation analysis between RA and AF combined with k-medoids clustering analysis. Temperature effects on fracture modes of PA were also considered and demonstrated. The results revealed that shear and tensile cracks coexisted and presented similar propagation trends during compression and splitting testing. RA exhibited upward trend and AF presented downward trend at the final failure stage of compression test, while an opposite phenomenon was observed for splitting test. k-medoids clustering realized the identification of cluster centers of shear and tensile cracks, which was beneficial for fracture mode characterization. As testing temperature rises, RA and AF for PA specimen under compression and splitting testing all decreased. In splitting test, the decrease of RA is greater than that of AF. In compression test, the decrease of AF was larger. The findings obtained in this study can provide references for understanding fracture mechanism and real-time fracture monitoring of PA pavement under complicated conditions.

关键词:

Temperature effect Pervious asphalt Fracture mode Acoustic emission Clustering analysis

作者机构:

  • [ 1 ] [Jiao, Yubo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Zhang, Yao]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Zhang, Lidong]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Zhang, Mengsu]Jilin Univ, Sch Transportat, Changchun, Jilin, Peoples R China
  • [ 5 ] [Fu, Liuxu]Southeast Univ, Sch Transportat, Nanjing, Jiangsu, Peoples R China

通讯作者信息:

  • 焦峪波

    [Jiao, Yubo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China

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来源 :

ENGINEERING FRACTURE MECHANICS

ISSN: 0013-7944

年份: 2019

卷: 211

页码: 209-220

5 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:136

JCR分区:1

被引次数:

WoS核心集被引频次: 43

SCOPUS被引频次: 44

ESI高被引论文在榜: 0 展开所有

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