The influence of compaction frequency on the skeleton characteristics of asphalt mixtures
In order to understand the influence of compaction energy on the skeletal structure of dense-graded asphalt mixtures, it is essential to establish a stable skeletal framework. This study addresses the limitations of existing research regarding the effects of compaction energy on asphalt mixtures by...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2024-09-01
|
| Series: | Journal of Highway and Transportation Research and Development |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/HTRD.2024.9480027 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850037670525272064 |
|---|---|
| author | Yichong Chen Xianglin Lu Junlin Zhou Leizhou Cai Cansheng Wang Cheng Lu |
| author_facet | Yichong Chen Xianglin Lu Junlin Zhou Leizhou Cai Cansheng Wang Cheng Lu |
| author_sort | Yichong Chen |
| collection | DOAJ |
| description | In order to understand the influence of compaction energy on the skeletal structure of dense-graded asphalt mixtures, it is essential to establish a stable skeletal framework. This study addresses the limitations of existing research regarding the effects of compaction energy on asphalt mixtures by analyzing the volumetric parameters of specimens subjected to varying compaction stages, specifically ranging from 25 to 1,000 gyrations. Digital image processing techniques are employed to investigate the microstructural characteristics of asphalt mixtures under different compaction energies. The results indicate: (1) For both Granite Asphalt Concrete (GAC) and Stone Matrix Asphalt (SMA) mixtures, the density initially increases rapidly, then slows down after 250 gyrations, without exhibiting a consistent trend. (2) Throughout the compaction process, the contact points and average coordination numbers of 4.75 mm aggregates in SMA mixtures surpass those observed in GAC mixtures. As compaction frequency increases, the contact points and average coordination numbers of coarse aggregates initially rise before subsequently declining, with some coarse aggregates becoming suspended within the fine aggregates. (3) By excluding the aggregates that do not make contact, the effective Voids in Coarse Aggregates (VCAeffect) are calculated to assess the skeletal changes within of the mixture. The SMA mixture demonstrates a more robust skeletal structure compared to GAC, with VCAeffect initially decreasing before increasing. As increase in the compaction frequency correlates with a rise in the number of no-contact coarse aggregates, ultimately leading to the degradation of the destruction of the skeletal structure of the asphalt mixture . |
| format | Article |
| id | doaj-art-a9fa23df217b4b48bacec54cd2c5263d |
| institution | DOAJ |
| issn | 2095-6215 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Highway and Transportation Research and Development |
| spelling | doaj-art-a9fa23df217b4b48bacec54cd2c5263d2025-08-20T02:56:47ZengTsinghua University PressJournal of Highway and Transportation Research and Development2095-62152024-09-011839510310.26599/HTRD.2024.9480027The influence of compaction frequency on the skeleton characteristics of asphalt mixturesYichong Chen0Xianglin Lu1Junlin Zhou2Leizhou Cai3Cansheng Wang4Cheng Lu5Guangxi Liubin Highway Construction and Development Co., Ltd, Nanning, Guangxi 530004, ChinaGuangxi Liubin Highway Construction and Development Co., Ltd, Nanning, Guangxi 530004, ChinaGuangxi Liubin Highway Construction and Development Co., Ltd, Nanning, Guangxi 530004, ChinaChina Highway(Beijing) Engineering Materials Technology Co., Ltd., Beijing 100076, ChinaChina Highway(Beijing) Engineering Materials Technology Co., Ltd., Beijing 100076, ChinaChina Highway(Beijing) Engineering Materials Technology Co., Ltd., Beijing 100076, ChinaIn order to understand the influence of compaction energy on the skeletal structure of dense-graded asphalt mixtures, it is essential to establish a stable skeletal framework. This study addresses the limitations of existing research regarding the effects of compaction energy on asphalt mixtures by analyzing the volumetric parameters of specimens subjected to varying compaction stages, specifically ranging from 25 to 1,000 gyrations. Digital image processing techniques are employed to investigate the microstructural characteristics of asphalt mixtures under different compaction energies. The results indicate: (1) For both Granite Asphalt Concrete (GAC) and Stone Matrix Asphalt (SMA) mixtures, the density initially increases rapidly, then slows down after 250 gyrations, without exhibiting a consistent trend. (2) Throughout the compaction process, the contact points and average coordination numbers of 4.75 mm aggregates in SMA mixtures surpass those observed in GAC mixtures. As compaction frequency increases, the contact points and average coordination numbers of coarse aggregates initially rise before subsequently declining, with some coarse aggregates becoming suspended within the fine aggregates. (3) By excluding the aggregates that do not make contact, the effective Voids in Coarse Aggregates (VCAeffect) are calculated to assess the skeletal changes within of the mixture. The SMA mixture demonstrates a more robust skeletal structure compared to GAC, with VCAeffect initially decreasing before increasing. As increase in the compaction frequency correlates with a rise in the number of no-contact coarse aggregates, ultimately leading to the degradation of the destruction of the skeletal structure of the asphalt mixture .https://www.sciopen.com/article/10.26599/HTRD.2024.9480027road engineeringdigital image processing techniquesskeleton characteristicscompaction energyeffective vca |
| spellingShingle | Yichong Chen Xianglin Lu Junlin Zhou Leizhou Cai Cansheng Wang Cheng Lu The influence of compaction frequency on the skeleton characteristics of asphalt mixtures Journal of Highway and Transportation Research and Development road engineering digital image processing techniques skeleton characteristics compaction energy effective vca |
| title | The influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| title_full | The influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| title_fullStr | The influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| title_full_unstemmed | The influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| title_short | The influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| title_sort | influence of compaction frequency on the skeleton characteristics of asphalt mixtures |
| topic | road engineering digital image processing techniques skeleton characteristics compaction energy effective vca |
| url | https://www.sciopen.com/article/10.26599/HTRD.2024.9480027 |
| work_keys_str_mv | AT yichongchen theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT xianglinlu theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT junlinzhou theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT leizhoucai theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT canshengwang theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT chenglu theinfluenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT yichongchen influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT xianglinlu influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT junlinzhou influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT leizhoucai influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT canshengwang influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures AT chenglu influenceofcompactionfrequencyontheskeletoncharacteristicsofasphaltmixtures |