Pavement Friction and Skid Resistance Measurement Methods: A Literature Review

Driving safety is of significance in the automobile industry and transportation systems. Pavement skid resistance has long been recognized as the most important parameter in reducing traffic accidents especially in wet conditions. The knowledge of the friction coefficient and skid resistance is very valuable information for safety enhancement of roads. Thus, it is important to find proper methods for measuring skid resistance and frictional properties of the pavement surface. There is a wide range of measurement methods and devices for measuring skid resistance. This paper presents a review on the research studies that have been done on characterization of the frictional properties of the pavement surface and discussed methods used for measurement and evaluation of texture characteristics and the strengths and weaknesses of these methods. Finally, some ideas have been suggested to develop new methods for better and proper measurement of skid resistance.

太阳能路面能量转化与路表性能研究

为了研究和评估太阳能路面作为可持续能源生产提供电能的可行性,研究团队构建了"太阳能电池板"(将太阳能电池嵌入橡胶和"树脂玻璃"之间)和"太阳能路面"(将太阳能电池嵌入两个多孔橡胶层之间)两种新型路面结构模型,两者均能吸收太阳能并将其转化为电能贮存在光伏电池中。在构建路面结构组成的基础上,从能量供给、路表性能两方面对两种新型太阳能路面的使用性能进行了评价。采用摆式摩擦系数仪(BPT)和万能试验机(UTM)测定了太阳能路面的路表抗滑性能和动态特性,并对两种新型太阳能路面进行了排水性能试验;同时,为了测试太阳能路面通过太阳能电池获取电能的可行性,进行了电压(电流)测量,确定了能量转换率(PCE)。结果表明:在潮湿的环境下,"太阳能电池板"和"太阳能路面"的BPN摆值分别为42和47.8;通过排水性能试验测定的"太阳能电池板"和"太阳能路面"的平均体积流量分别为0.018L/s和0.042L/s,而传统沥青路面的排水性能试验测定值为0.0224L/s。研究结果表明:由太阳能电池和橡胶层组成的新型太阳能路面不仅可满足道路运输的安全参数,还具备发电能力,可作为一种新型路面进行研究和发展。