Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement
A detection and evaluation system containing a two-level index of structural integrity and bearing capacity was constructed based on ground-penetrating radar (GPR) and a falling weight deflector (FWD). This system was constructed to solve problems with the detection, evaluation, and structural and m...
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MDPI AG
2024-08-01
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| author | Jianping Gao Zhixiong Qiu Chunlong Xiong |
| author_facet | Jianping Gao Zhixiong Qiu Chunlong Xiong |
| author_sort | Jianping Gao |
| collection | DOAJ |
| description | A detection and evaluation system containing a two-level index of structural integrity and bearing capacity was constructed based on ground-penetrating radar (GPR) and a falling weight deflector (FWD). This system was constructed to solve problems with the detection, evaluation, and structural and material design of asphalt rehabilitation for the prevention and control of asphalt reflection cracks in asphalt overlaying composite Portland cement pavement. Based on the detected data from the GPR and FWD, the reasonable and recommended thickness range of the stress-absorbing layer was determined by the finite element method, and the optimization design of an anti-reflective crack structure is proposed. Furthermore, a material design and engineering application of the stress-absorbing layer was carried out. The results show that an additional 10 cm layer of repaved asphalt can reduce temperature stress by 64.1%, reduce fatigue stress by 29.3% at the cement slab bottom, and extend the service life by 23.1 years. The reasonable thickness of the stress-absorbing layer ranges from 1.6 cm to 2.0 cm, and the recommended structural combination design is a 4 cm SMA-13 upper layer, a 4 cm AC-16 lower layer, and a 2 cm stress-absorbing layer overlaying existing asphalt overlay. The impact toughness of the designed stress-absorbing layer is 1.05 times and 1.44 times that of the other stress-absorbing layer and the AC-16 asphalt mixture, respectively, which have been successfully used for more than 5 years. The recommended design rehabilitation has good engineering application. The uniformity of the stress-absorbing layer can reach 63%, and an anti-reflective crack effect is expected. The results of this study provide design methodology and experience for composite pavement repaving. |
| format | Article |
| id | doaj-art-076848da51fa4d1197f24c1b2b03060f |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-08-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-076848da51fa4d1197f24c1b2b03060f2025-08-20T01:56:01ZengMDPI AGBuildings2075-53092024-08-01149270210.3390/buildings14092702Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement PavementJianping Gao0Zhixiong Qiu1Chunlong Xiong2Guangdong Provincial Freeway Co., Ltd., Guangzhou 510100, ChinaGuangdong Provincial Freeway Co., Ltd., Guangzhou 510100, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, ChinaA detection and evaluation system containing a two-level index of structural integrity and bearing capacity was constructed based on ground-penetrating radar (GPR) and a falling weight deflector (FWD). This system was constructed to solve problems with the detection, evaluation, and structural and material design of asphalt rehabilitation for the prevention and control of asphalt reflection cracks in asphalt overlaying composite Portland cement pavement. Based on the detected data from the GPR and FWD, the reasonable and recommended thickness range of the stress-absorbing layer was determined by the finite element method, and the optimization design of an anti-reflective crack structure is proposed. Furthermore, a material design and engineering application of the stress-absorbing layer was carried out. The results show that an additional 10 cm layer of repaved asphalt can reduce temperature stress by 64.1%, reduce fatigue stress by 29.3% at the cement slab bottom, and extend the service life by 23.1 years. The reasonable thickness of the stress-absorbing layer ranges from 1.6 cm to 2.0 cm, and the recommended structural combination design is a 4 cm SMA-13 upper layer, a 4 cm AC-16 lower layer, and a 2 cm stress-absorbing layer overlaying existing asphalt overlay. The impact toughness of the designed stress-absorbing layer is 1.05 times and 1.44 times that of the other stress-absorbing layer and the AC-16 asphalt mixture, respectively, which have been successfully used for more than 5 years. The recommended design rehabilitation has good engineering application. The uniformity of the stress-absorbing layer can reach 63%, and an anti-reflective crack effect is expected. The results of this study provide design methodology and experience for composite pavement repaving.https://www.mdpi.com/2075-5309/14/9/2702composited Portland cement pavement with asphalt overlaydetection and evaluationstructure and material designanti-reflective crackstress-absorbing layerimpact toughness |
| spellingShingle | Jianping Gao Zhixiong Qiu Chunlong Xiong Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement Buildings composited Portland cement pavement with asphalt overlay detection and evaluation structure and material design anti-reflective crack stress-absorbing layer impact toughness |
| title | Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement |
| title_full | Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement |
| title_fullStr | Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement |
| title_full_unstemmed | Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement |
| title_short | Mechanical Response and Anti-Reflective Crack Design in New Asphalt Overlays on Existing Asphalt Overlaying Composite Portland Cement Pavement |
| title_sort | mechanical response and anti reflective crack design in new asphalt overlays on existing asphalt overlaying composite portland cement pavement |
| topic | composited Portland cement pavement with asphalt overlay detection and evaluation structure and material design anti-reflective crack stress-absorbing layer impact toughness |
| url | https://www.mdpi.com/2075-5309/14/9/2702 |
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