A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement
Homogenized micro-crack crushing is a new method of concrete pavement rehabilitation that makes full use of the bearing capacity of the original concrete pavement, whereby the treated pavement can be directly overlaid with hot mixed asphalt concrete. In order to solve the problem of longitudinal cra...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/14/7114 |
| _version_ | 1797407602602147840 |
|---|---|
| author | Wenjie Li Ying Guo Bin Liang Jinchao Yue |
| author_facet | Wenjie Li Ying Guo Bin Liang Jinchao Yue |
| author_sort | Wenjie Li |
| collection | DOAJ |
| description | Homogenized micro-crack crushing is a new method of concrete pavement rehabilitation that makes full use of the bearing capacity of the original concrete pavement, whereby the treated pavement can be directly overlaid with hot mixed asphalt concrete. In order to solve the problem of longitudinal crack extension of a cracked core in the weak position of local pavement, the crack propagation mode of concrete slabs under low-velocity impact from different numbers and distributions of impact heads was studied using numerical simulation. Moreover, field tests were also carried out to determine the optimal layout of drop hammer impact heads, and the numerical simulation results were compared with the experimental data. The results show that, when a concrete slab is impacted by a single impact head, the bottom of the slab first cracks and then the crack develops upward until the main crack runs through the concrete slab. However, when the concrete slab is impacted by multiple-impact heads, including three or four impact heads, the concrete slab forms a triangular or quadrilateral fracture core, respectively. The numerical simulation results are in good agreement with the laboratory experiments. Through the optimized arrangement of the hammer’s impact heads, the problem of longitudinal crack extension of a cracked core can be effectively solved, and the probability of reflection cracks can be reduced. |
| first_indexed | 2024-03-09T03:44:54Z |
| format | Article |
| id | doaj.art-edbcb7b4a618406ca3c10b6271b4efca |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T03:44:54Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-edbcb7b4a618406ca3c10b6271b4efca2023-12-03T14:36:23ZengMDPI AGApplied Sciences2076-34172022-07-011214711410.3390/app12147114A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete PavementWenjie Li0Ying Guo1Bin Liang2Jinchao Yue3School of Civil Engineering, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Civil Engineering, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Civil Engineering, Henan University of Science and Technology, Luoyang 471023, ChinaSchool of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, ChinaHomogenized micro-crack crushing is a new method of concrete pavement rehabilitation that makes full use of the bearing capacity of the original concrete pavement, whereby the treated pavement can be directly overlaid with hot mixed asphalt concrete. In order to solve the problem of longitudinal crack extension of a cracked core in the weak position of local pavement, the crack propagation mode of concrete slabs under low-velocity impact from different numbers and distributions of impact heads was studied using numerical simulation. Moreover, field tests were also carried out to determine the optimal layout of drop hammer impact heads, and the numerical simulation results were compared with the experimental data. The results show that, when a concrete slab is impacted by a single impact head, the bottom of the slab first cracks and then the crack develops upward until the main crack runs through the concrete slab. However, when the concrete slab is impacted by multiple-impact heads, including three or four impact heads, the concrete slab forms a triangular or quadrilateral fracture core, respectively. The numerical simulation results are in good agreement with the laboratory experiments. Through the optimized arrangement of the hammer’s impact heads, the problem of longitudinal crack extension of a cracked core can be effectively solved, and the probability of reflection cracks can be reduced.https://www.mdpi.com/2076-3417/12/14/7114PCC pavementhomogenized micro-crack impact crushingnumerical simulationfracture mechanismhammer optimization |
| spellingShingle | Wenjie Li Ying Guo Bin Liang Jinchao Yue A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement Applied Sciences PCC pavement homogenized micro-crack impact crushing numerical simulation fracture mechanism hammer optimization |
| title | A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement |
| title_full | A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement |
| title_fullStr | A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement |
| title_full_unstemmed | A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement |
| title_short | A Numerical Study on the Crack Propagation of Homogenized Micro-Crack Crushing for Concrete Pavement |
| title_sort | numerical study on the crack propagation of homogenized micro crack crushing for concrete pavement |
| topic | PCC pavement homogenized micro-crack impact crushing numerical simulation fracture mechanism hammer optimization |
| url | https://www.mdpi.com/2076-3417/12/14/7114 |
| work_keys_str_mv | AT wenjieli anumericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT yingguo anumericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT binliang anumericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT jinchaoyue anumericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT wenjieli numericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT yingguo numericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT binliang numericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement AT jinchaoyue numericalstudyonthecrackpropagationofhomogenizedmicrocrackcrushingforconcretepavement |