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Open AccessArticle

Characterization of Bonding between Asphalt Concrete Layer under Water and Salt Erosion

1
School of Civil Engineering &Architecture, Xinjiang University, Urumqi 830047, China
2
Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Shunhe Road No. 45, Zhengzhou 450003, China
*
Author to whom correspondence should be addressed.
Materials 2019, 12(19), 3055; https://doi.org/10.3390/ma12193055
Received: 1 September 2019 / Revised: 13 September 2019 / Accepted: 13 September 2019 / Published: 20 September 2019
The contact state between layers of asphalt pavement not only has a significant effect on the mechanical response of road structure but is also the bottleneck of research on the mechanical behavior of pavement structure at present. In this paper, the effects and laws of different water–salt entry modes, salt solution concentrations, and temperatures coupling on the contact state between base and surface layers are studied by a 45° inclined shear test. The simulation and verification of each working condition are carried out by ABAQUS (Dassault, Paris, France) the friction coefficient between layers is reversed, and the actual contact state between layers is characterized in order to realize comprehensive evaluation and reasonable expression. The results show that different modes have different effects on contact characteristics. At the same temperature and concentration of the salt solution, bonding of water and salt erosion is the best, followed by direct erosion, with the worst being from bottom to top, and the interlayer bonding condition is weakened with increase in temperature. The relative accuracy of the software simulation and test analysis was as high as 92% and the friction coefficient of the water-free salt erosion test piece was found to be about 0.85 at 25 °C, while after the bottom-up erosion of the 14% salt solution the friction coefficient was found to be about 0.43, which indicates that the corrosion of the water–salt will have a great effect on the bonding condition between the structural layers of the road. View Full-Text
Keywords: road engineering; bonding condition; shear test; numerical simulation; shear modulus; friction coefficient road engineering; bonding condition; shear test; numerical simulation; shear modulus; friction coefficient
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MDPI and ACS Style

Ran, W.; Zhang, Y.; Li, L.; Shen, X.; Zhu, H.; Zhang, Y. Characterization of Bonding between Asphalt Concrete Layer under Water and Salt Erosion. Materials 2019, 12, 3055.

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