Full
WANG Jingyuan (1997-), male, Master candidate. E-mail: 904124089@qq.com
Outline
It is essential for the adhesion mechanism of the cement-asphalt interface to evaluate the performance of cement-asphalt composite material in a micro-scale. The interface molding experiment was designed in laboratory according to the actual formation process. The influences of environmental temperature, grouting type and asphalt type on the cement-asphalt interfacial bonding characteristics were investigated. The microstructures and features of the cement-asphalt interfacial transition zone were analyzed by scanning electronic microscopy, energy dispersive spectroscopy, and Fourier transformed infrared spectroscopy. The hydrophilia of grouting and asphalt was evaluated by contact angle analysis. The adhesion mechanism of the cement-asphalt interface was investigated. The results show that the bonding strength of the cement-asphalt interface decreases with increasing the temperature. The interfacial bonding strength of sulphoaluminate cement-asphalt is 1.03-1.98 N/mm2 at 25-35 ℃, which is more than 10% greater than that of the Portland cement-asphalt. The interfacial bonding strength of sulphoaluminate cement-asphalt is 0.32-0.38 N/mm2 at 60 ℃, which is increased by >80%, compared with that of Portland cement-asphalt. Grouting has a slight emulsification effect on the asphalt interface region, reflecting that the more free asphalt changes to structural asphalt and increases the bond strength. The cement-asphalt interfacial adhesion is due to the physical force. The adhesion failure is the damage between the structural asphalt and free asphalts. Based on the adhesion mechanism, the asphalt-cement composite material can be improved to reduce the crack risk of cement grouting asphalt composite pavement.
60
7
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
