Abstract
There are high mountains and steep roads in Guizhou Province. Affected by the relatively closed environment, high humidity and other factors, the skid resistance and durability of the highway in tunnels were obviously reduced, which affects the normal operation of the asphalt pavement. Based on the pavement maintenance project of the highway in the Yilaga Tunnel in Guizhou Province, a new kind of epoxy surface treatment maintenance technology for asphalt pavement has been introduced in this paper. Through the comparative analysis of friction coefficient, structural depth and other anti-sliding performance before and after construction, the results has shown that the technology can effectively solve the early diseases and significantly improve the anti-sliding performance of the pavement, and assist to reduce the occurrence of traffic accidents.
Highlights
Guizhou Province is located in the south of China, with a lot of mountains and high rainfall environment
Based on Guizhou Province Science and technology project ‘Research on Anti-sliding Treatment Technology of Epoxy Surface of Expressway Asphalt Pavement’(Project number: 2020-123-012), the asphalt pavement epoxy surface treatment maintenance technology is used in the Guizhou Yilaga Tunnel to repair the early diseases of the tunnel pavement, and the friction coefficient, structural depth, bonding strength and other indicators of different time periods before and after construction were compared and analyzed
According to the relevant requirements in the current specification ‘Field Test Specification for Highway Subgrade and Pavement’ (JTG 3450-2019), indexes including the appearance quality, tilting friction coefficient, structural depth, water permeability coefficient and bonding strength of the Yilaga Tunnel were observed before and after the construction of the epoxy surface treatment, to verify the application effect of the technology. 4.1 Appearance quality The appearance quality has been observed, pictures are shown in Figure. 2 and Figure 3
Summary
Guizhou Province is located in the south of China, with a lot of mountains and high rainfall environment. The highway tunnel is in a relatively closed special environment, and the high humidity of the pavement has a bad impact on its skid resistance and durability. Under the long-term effect of vehicle load and natural factors, asphalt pavement is prone to early disease, which affects the comfort and safety of road driving. Based on Guizhou Province Science and technology project ‘Research on Anti-sliding Treatment Technology of Epoxy Surface of Expressway Asphalt Pavement’(Project number: 2020-123-012), the asphalt pavement epoxy surface treatment maintenance technology is used in the Guizhou Yilaga Tunnel to repair the early diseases of the tunnel pavement, and the friction coefficient, structural depth, bonding strength and other indicators of different time periods before and after construction were compared and analyzed
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