ABSTRACT

The paper presents a comparison of friction coefficients and MPD (Mean Profile Depth) parameters of EAC (Exposed Aggregate Concrete) pavements with a maximum aggregate size of 8, 11 and 14 mm. In order to obtain for all tested EAC pavements the same conditions that simulate the phenomenon of polishing, tests were performed using a FAP (Friction After Polishing) machine in laboratory conditions. Macrotexture measurements were made on the surface of each sample using an Elatexure laser profile. In addition, three types of coarse aggregates were selected based on their resistance to polishing, which was determined on the basis of PSV (Polished Stone Value). Based on ANOVA, a significant influence of maximum aggregate size on both the friction coefficient and the MPD parameter was demonstrated. Along with the increase in the aggregate maximum grain size in EAC, the increase in MPD value was recorded. Despite of this fact, no effect of resistance to the polishing of aggregates with PSV from 48 to 52 on skid resistance was demonstrated. However, the decision to apply individual solutions should take into account road classification in the road network system, traffic volume and speed limits.

摘要

本文比较了最大骨料尺寸为 8、11 和 14 毫米的 EAC（外露骨料混凝土）路面的摩擦系数和 MPD（平均剖面深度）参数。为了对所有测试的 EAC 路面获得模拟抛光现象的相同条件，在实验室条件下使用 FAP（抛光后摩擦）机器进行测试。使用 Elatexure 激光轮廓对每个样品的表面进行宏观纹理测量。此外，根据PSV（抛光石值）确定的耐抛光性选择了三种粗骨料。基于方差分析，证明了最大骨料尺寸对摩擦系数和 MPD 参数的显着影响。随着 EAC 中总最大晶粒尺寸的增加，记录了 MPD 值的增加。尽管如此，PSV 为 48 至 52 的集料抛光阻力对防滑性没有影响。然而，应用个别解决方案的决定应考虑道路网络系统中的道路分类、交通量和速度限制。