Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test
This paper aims to clarify the shear deformation behavior of double-layer asphalt mixtures using the virtual uniaxial penetration test (UPT) with a discrete element method. For this purpose, asphalt mixtures with two different nominal maximum aggregate sizes were designed for the preparation of doub...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/17/3700 |
| _version_ | 1797556439264264192 |
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| author | Changjiang Kou Xiaohui Pan Peng Xiao Aihong Kang Zhengguang Wu |
| author_facet | Changjiang Kou Xiaohui Pan Peng Xiao Aihong Kang Zhengguang Wu |
| author_sort | Changjiang Kou |
| collection | DOAJ |
| description | This paper aims to clarify the shear deformation behavior of double-layer asphalt mixtures using the virtual uniaxial penetration test (UPT) with a discrete element method. For this purpose, asphalt mixtures with two different nominal maximum aggregate sizes were designed for the preparation of double-layer wheel tracking test specimens. Then, the cylindrical cores were prepared from the specimens and were cut for capturing the longitudinal profile images. These images were used to reconstruct a two-dimensional discrete element model (DEM) of the uniaxial penetration test specimen. The results indicate that the shear deformation behavior of the asphalt mixtures showed corresponding changes under the virtual loading. The tensile and compressive stress were distributed unevenly within the upper layer after the test, and both coarse aggregates and asphalt mortars bore a greater shear stress. Therefore, cracks were more likely to occur in the upper layer, leading to the failure of the specimens. This process enhanced the bonding between the asphalt mortars and the mineral aggregates. The aggregate particles in the upper layer moved more vertically, while those in the lower layer generally moved more laterally under the virtual loading. This behavior reveals the rutting mechanism of asphalt pavement. |
| first_indexed | 2024-03-10T17:01:54Z |
| format | Article |
| id | doaj.art-720197634c5c4cf6a074940fd7125176 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T17:01:54Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-720197634c5c4cf6a074940fd71251762023-11-20T10:55:53ZengMDPI AGMaterials1996-19442020-08-011317370010.3390/ma13173700Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration TestChangjiang Kou0Xiaohui Pan1Peng Xiao2Aihong Kang3Zhengguang Wu4College of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, ChinaCollege of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, ChinaThis paper aims to clarify the shear deformation behavior of double-layer asphalt mixtures using the virtual uniaxial penetration test (UPT) with a discrete element method. For this purpose, asphalt mixtures with two different nominal maximum aggregate sizes were designed for the preparation of double-layer wheel tracking test specimens. Then, the cylindrical cores were prepared from the specimens and were cut for capturing the longitudinal profile images. These images were used to reconstruct a two-dimensional discrete element model (DEM) of the uniaxial penetration test specimen. The results indicate that the shear deformation behavior of the asphalt mixtures showed corresponding changes under the virtual loading. The tensile and compressive stress were distributed unevenly within the upper layer after the test, and both coarse aggregates and asphalt mortars bore a greater shear stress. Therefore, cracks were more likely to occur in the upper layer, leading to the failure of the specimens. This process enhanced the bonding between the asphalt mortars and the mineral aggregates. The aggregate particles in the upper layer moved more vertically, while those in the lower layer generally moved more laterally under the virtual loading. This behavior reveals the rutting mechanism of asphalt pavement.https://www.mdpi.com/1996-1944/13/17/3700double-layer asphalt mixtureshear deformation behaviorvirtual uniaxial penetration testdiscrete element model |
| spellingShingle | Changjiang Kou Xiaohui Pan Peng Xiao Aihong Kang Zhengguang Wu Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test Materials double-layer asphalt mixture shear deformation behavior virtual uniaxial penetration test discrete element model |
| title | Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test |
| title_full | Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test |
| title_fullStr | Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test |
| title_full_unstemmed | Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test |
| title_short | Shear Deformation Behavior of a Double-Layer Asphalt Mixture Based on the Virtual Simulation of a Uniaxial Penetration Test |
| title_sort | shear deformation behavior of a double layer asphalt mixture based on the virtual simulation of a uniaxial penetration test |
| topic | double-layer asphalt mixture shear deformation behavior virtual uniaxial penetration test discrete element model |
| url | https://www.mdpi.com/1996-1944/13/17/3700 |
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