路面人造纹理定向设计及其抗滑性能研究

Directional design of pavement artificial textures and their skid resistance performance

【目的】研究路面表面人造纹理与抗滑性能之间的关系。【方法】利用3D打印技术定向设计并制备不同形状的人造纹理试件(包含三角形纹理、矩形纹理和半圆形纹理3种形状和纹理高度为1、2、3、4、5 mm的5种纹理),并以4 mm高的三角形纹理设置了一组磨耗纹理试件,采用摆式摩擦试验、构造深度试验以及提取纹理顶部接触区域对各个试件的抗滑性能进行评价。【结果】2 mm高的三角形纹理和3 mm高的矩形纹理的抗滑性能最好,摆值均可达到107。在构造深度和摆值两个方面,三角形纹理和矩形纹理的抗滑性能相近,且均明显大于半圆形纹理的抗滑性能。随着磨损率的增大,摩擦接触面积增大,但纹理表面粗糙程度降低,导致抗滑性能逐渐衰减。【结论】纹理的抗滑性能主要取决于纹理的粗糙程度,而接触面积的影响相对较小。本文提供了一种定向纹理设计方法,为深入理解路面表面纹理与抗滑性能之间的关系提供借鉴与指导。

[Purposes]The paper aims to investigate the effect of artificial surface texture on the skid resistance of pavements.[Methods]Different-shaped artificial texture specimens were designed and prepared using 3D printing technology,including three shapes(triangle,rectangle,and semicircle)and five texture heights(1,2,3,4,5 mm).A set of abrasion texture specimens with 4 mm high triangles was also prepared.The skid resistance of each specimen was evaluated using a pendulum friction test,construction depth test,and extraction of the contact area on the top of the texture.[Findings]The triangular texture with a height of 2 mm and the rectangular texture with a height of 3 mm can provide the best skid resistance for the pavement,and their pendulum values can reach 107.The skid resistance performance of the triangular texture and the rectangular texture is similar and significantly larger than that of the semicircular texture.As the wear rate increases,the friction contact area increases,but the roughness of the texture surface decreases,leading to a gradual decline in skid resistance.[Conclusions]The skid resistance of the texture mainly depends on the roughness of the texture.This study proposed an method to directionaly design texture,which can provide guidance to better understand the relationship between pavement surface texture and skid resistance.