Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods
The disposal of agricultural straw has been a severe environmental concern in China and many other countries. In this study, the complex modulus of using biochar converted from straw as an alternative mineral filler in asphalt mastic was investigated through both laboratory tests and modeling. The e...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/2317420 |
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| author | Yushuai Wu Peng Cao Feiting Shi Ketong Liu Xuhao Wang Zhen Leng Zhifei Tan Changjun Zhou |
| author_facet | Yushuai Wu Peng Cao Feiting Shi Ketong Liu Xuhao Wang Zhen Leng Zhifei Tan Changjun Zhou |
| author_sort | Yushuai Wu |
| collection | DOAJ |
| description | The disposal of agricultural straw has been a severe environmental concern in China and many other countries. In this study, the complex modulus of using biochar converted from straw as an alternative mineral filler in asphalt mastic was investigated through both laboratory tests and modeling. The experimental results indicated that the biochar can provide asphalt mastic higher stiffness than the conventional granite mineral filler. It was believed that the special porous structure of biochar providing a thicker coating layer of mineral filler increases the stiffness modulus of asphalt mastic. To consider this factor into the micromechanical model, a modified generalized self-consistent model (MGSCM) with a coating layer was proposed. Besides, the finite element (FE) microstructural model with a coating layer generated by random aggregate distribution method was used to numerically evaluate the effect of the coating layer on the complex modulus of asphalt mastics. The predicted results indicated that the generalized self-consistent model (MGSCM) with a coating layer is an efficient and accurate model for predicting the complex modulus of asphalt mastics. Moreover, the FE modeling proved that the coating layer can significantly improve the complex modulus of asphalt mastics. Therefore, the experiments and modeling carried out in this study provided insight for biochar applications to improve the performance of asphalt mixtures. |
| format | Article |
| id | doaj-art-48752e3047ac4ed39074131a8df67a73 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-48752e3047ac4ed39074131a8df67a732025-02-03T01:30:31ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/23174202317420Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution MethodsYushuai Wu0Peng Cao1Feiting Shi2Ketong Liu3Xuhao Wang4Zhen Leng5Zhifei Tan6Changjun Zhou7School of Water Resources and Electric Power, Qinghai University, Xining 810016, ChinaCollege of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 10086, ChinaCollege of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaQinghai University-Tsinghua University Sanjiangyuan University Sanjiangyuan Research Institute, Qinghai University, Xinning 810016, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hong, Kowloon, Hong KongDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hong, Kowloon, Hong KongSchool of Transportation and Logistics, Dalian University of Technology, Dalian 116024, ChinaThe disposal of agricultural straw has been a severe environmental concern in China and many other countries. In this study, the complex modulus of using biochar converted from straw as an alternative mineral filler in asphalt mastic was investigated through both laboratory tests and modeling. The experimental results indicated that the biochar can provide asphalt mastic higher stiffness than the conventional granite mineral filler. It was believed that the special porous structure of biochar providing a thicker coating layer of mineral filler increases the stiffness modulus of asphalt mastic. To consider this factor into the micromechanical model, a modified generalized self-consistent model (MGSCM) with a coating layer was proposed. Besides, the finite element (FE) microstructural model with a coating layer generated by random aggregate distribution method was used to numerically evaluate the effect of the coating layer on the complex modulus of asphalt mastics. The predicted results indicated that the generalized self-consistent model (MGSCM) with a coating layer is an efficient and accurate model for predicting the complex modulus of asphalt mastics. Moreover, the FE modeling proved that the coating layer can significantly improve the complex modulus of asphalt mastics. Therefore, the experiments and modeling carried out in this study provided insight for biochar applications to improve the performance of asphalt mixtures.http://dx.doi.org/10.1155/2020/2317420 |
| spellingShingle | Yushuai Wu Peng Cao Feiting Shi Ketong Liu Xuhao Wang Zhen Leng Zhifei Tan Changjun Zhou Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods Advances in Materials Science and Engineering |
| title | Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods |
| title_full | Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods |
| title_fullStr | Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods |
| title_full_unstemmed | Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods |
| title_short | Modeling of the Complex Modulus of Asphalt Mastic with Biochar Filler Based on the Homogenization and Random Aggregate Distribution Methods |
| title_sort | modeling of the complex modulus of asphalt mastic with biochar filler based on the homogenization and random aggregate distribution methods |
| url | http://dx.doi.org/10.1155/2020/2317420 |
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