Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic
In order to analyze the thixotropy of mastic asphalt concrete during the mixing process, the factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are studied, and the measures to shorten the mixing time of mastic asphalt mixture are given. The dynamic viscosity of mastic asph...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/13/9/2380 |
| _version_ | 1797580997192056832 |
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| author | Shunxian Zhang Chuanxi Luo Zhiyong Huang Jian Li |
| author_facet | Shunxian Zhang Chuanxi Luo Zhiyong Huang Jian Li |
| author_sort | Shunxian Zhang |
| collection | DOAJ |
| description | In order to analyze the thixotropy of mastic asphalt concrete during the mixing process, the factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are studied, and the measures to shorten the mixing time of mastic asphalt mixture are given. The dynamic viscosity of mastic asphalt binder and asphalt mastic with time and shear rate is obtained via the step frequency method, and the thixotropic constitutive models of mastic asphalt binder and asphalt mastic are constructed by structural dynamics model, exponential equation, and extended exponential equation respectvely. The improved time thixotropy index is used to analyze the effects of asphalt type, asphalt–aggregate ratio, filler type, heating temperature, and shear rate, and the laws of various factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are obtained. The research shows that the extended exponential model can better characterize the thixotropy of mastic asphalt binder and asphalt mastic under different shear rates. When the amount of lake asphalt or cement is increased, the viscosity of the system and the mixing time to reach a steady viscosity increases; that is, the mixing time needs to be increased. Increasing shear temperature does not change the time parameter to reach steady viscosity; that is, it cannot shorten mixing time. When the shear rate is increased, the time for the system to reach the steady viscosity will be shortened; that is, the time for mixing the mixture can be shortened. |
| first_indexed | 2024-03-10T22:57:47Z |
| format | Article |
| id | doaj.art-eb7981233cfa4e1ea3183a87308f9517 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T22:57:47Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-eb7981233cfa4e1ea3183a87308f95172023-11-19T09:53:14ZengMDPI AGBuildings2075-53092023-09-01139238010.3390/buildings13092380Study on Thixotropy of Mastic Asphalt Binder and Asphalt MasticShunxian Zhang0Chuanxi Luo1Zhiyong Huang2Jian Li3Changda Municipal Engineering (Guangdong) Co., Ltd., Zhongshan 528400, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510000, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510000, ChinaXiaoning Institute of Roadway Engineering, Guangzhou 510000, ChinaIn order to analyze the thixotropy of mastic asphalt concrete during the mixing process, the factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are studied, and the measures to shorten the mixing time of mastic asphalt mixture are given. The dynamic viscosity of mastic asphalt binder and asphalt mastic with time and shear rate is obtained via the step frequency method, and the thixotropic constitutive models of mastic asphalt binder and asphalt mastic are constructed by structural dynamics model, exponential equation, and extended exponential equation respectvely. The improved time thixotropy index is used to analyze the effects of asphalt type, asphalt–aggregate ratio, filler type, heating temperature, and shear rate, and the laws of various factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are obtained. The research shows that the extended exponential model can better characterize the thixotropy of mastic asphalt binder and asphalt mastic under different shear rates. When the amount of lake asphalt or cement is increased, the viscosity of the system and the mixing time to reach a steady viscosity increases; that is, the mixing time needs to be increased. Increasing shear temperature does not change the time parameter to reach steady viscosity; that is, it cannot shorten mixing time. When the shear rate is increased, the time for the system to reach the steady viscosity will be shortened; that is, the time for mixing the mixture can be shortened.https://www.mdpi.com/2075-5309/13/9/2380mastic asphalt binderthixotropyconstitutive modelviscosity |
| spellingShingle | Shunxian Zhang Chuanxi Luo Zhiyong Huang Jian Li Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic Buildings mastic asphalt binder thixotropy constitutive model viscosity |
| title | Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic |
| title_full | Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic |
| title_fullStr | Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic |
| title_full_unstemmed | Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic |
| title_short | Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic |
| title_sort | study on thixotropy of mastic asphalt binder and asphalt mastic |
| topic | mastic asphalt binder thixotropy constitutive model viscosity |
| url | https://www.mdpi.com/2075-5309/13/9/2380 |
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