ZHAO Fang-ran, QIU Tuan-jie, ZHANG Hao
China Journal of Highway and Transport. 2016, 29(7): 15-21.
In order to obtain the effect laws of pavement surface texture parameters on its anti-sliding performance so as to scientifically guide the anti-sliding design and construction of the pavement, the deformed friction component to tire caused by pavement macro-texture and the mechanical behavior of micro-cutting friction caused by the tip of pavement surface micro-texture to tire were discussed based on the analyses of the influence factors of the macro-texture, coarse-texture and micro-texture of the cement concrete pavement on the anti-sliding friction mechanism. The friction coefficient analysis model concerning pavement texture spacing, texture convex edge angle, texture depth, and texture groove width and other parameters was presented. Based on the elastic envelope theory, the influence laws of parameters including texture spacing, convex edge angle, texture depth, groove width on the deformed friction and micro-cutting friction were analyzed, and laboratory test was carried out for the specimens with different texture spacings, texture convex edge angles and texture depths. The results show that the anti-sliding performance is significantly increased as texture depth increases within the range of 2-6 mm; however, when the texture depth is deeper than 4 mm, the convex edge angle has little impact on anti-sliding performance when the texture spacing is less than 20 mm; but when the texture spacing is larger than 25 mm, the convex edge angle has significant influence on anti-sliding performance, and the friction increases with the increase of texture depth. Therefore texture depth needs to be increased for the loose texture pavement, while the increment of the texture depth has no effect when the texture spacing is close. The decrement of texture convex edge angle has significant influence on the anti-sliding performance. Nonetheless, when the texture convex edge angle is abraded to less than 45°, there is almost no effect of texture spacing on the anti-sliding performance. So for the pavement which is easy to be worn out, the friction can hardly be enhanced by decreasing the texture spacing, when the texture spacing is less than 20 mm.
