Materials Reports  2020, Vol. 34 Issue (Z2): 283-287 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| GTM-based Experimental Study on the Asphalt Mixtures Design |
| CHAI Jinling1,2, LI Wei2,3,4
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1 Henan Vocational and Technical College of Communications, Zhengzhou 451400, China
2 State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China
3 Henan Transportation Research Institute Co.,Ltd, Zhengzhou 450006, China
4 Henan Future Transportation Technologies Co.,Ltd, Zhengzhou 450000, China |
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Abstract In ordert to study the asphalt mixture GTM (Gyratory testing machine) mixture ratio design method in the road engineering practicability effectively, through comparison and analysis of volumetric property with GTM design and Marshall design. Finally, the pavement performance of on grouted composite materials was validated. The results show that: The limit equilibrium methods adopted in GTM design methods, the optimum proportion can be determined by stability factor GIS and shear safety factor GSF. Compared with the Marshall mix design, the optimum proportion has declined markedly, volume relative density and VFA asphalt saturation index increased, voids of mineral aggregate and ratio of void have generally on the low side; Marshall design method control is not considered to fit for asphalt mixture. Under the optimum conditions. Just as a reference index volume compressibility parameters, the road performance requires corresponding verification. The performance of GTM design asphalt mixture is better than the Marshall mix design. High temperature stable performance and low temperature freeze resistance loss ability were improved significantly. Low temperature anti-cracking performance advantage is not obvious. With the increase of temperature, the higher-temperature deformation resistance of asphalt mixture was more, high temperature has a lower sensitivity. In the case of AC-16 test data, Asphalt content was reduced by 6.1%, volume relative density increased by 1.9%, VV fell by 37.6%,VMA reduced by 18.5% and stability increased by 27%. Among them, 60 ℃ dynamic stability increased by 26.9%,65 ℃ dynamic stability increased by 99.2%, low temperature bending failure strain increased by 4.7%, and the residual stability increased by 4.9%, freeze-thaw splitting strength ratio increased by 8.7%.
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Published: 08 January 2021
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| Fund:This work was supported by the State Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology (kfj140103), Henan Province Science and Technology Research Project (192102310470), Henan Province Transportation Hall of Science and Technology Project (2018J3), Youth Science Fund Project of National Natural Science Fund (51708048). |
| About author:: Jinling Chai, born in Tianjin City in November 1976, July 2001 graduated from North China University of Water Resources and Electric Power. Major in construction engineering, Bachelor's degree in engineering. After college graduation, she took up her post in Henan Vocational an Technical College of Communications, Engaged in teaching in traffic civil engineering, at the same time also responsible for the school construction of the project. The current title is associate professor, the main research domain is civil engineering constructiaon and constructiaon management. She has won the second prize for teaching achievements in Henan Province, the first prize for scientific and technological achievements in the provincial education department, the provincial transportation science and technology achievements award and more than 10 awards. She is a member of Henan university capital construction association.Wei Li, graduated in July 2013 in Changsha University of Science and Technology Road and Railway Enginee-ring.Mainly engaged in the urban construction waste renewable resources use, waste asphalt cold regeneration applications, rubber compound modified asphalt application, green highway construction, etc. |
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