不同宏观结构混凝土路面抗滑性、平均结构深度和耐磨性关系的研究

Reza Jalalkamali, Mohammad Mahdi Dibaee, M. Kamali, A. Hassani
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引用次数: 1

摘要

道路交通事故是世界上十大死亡原因之一。路面缺乏足够的摩擦力和抗滑性是造成交通事故的重要因素。在本研究中,为了评估路面表面宏观纹理与防滑性能的关系,采用了五种方法在混凝土路面上形成宏观纹理。采用砂斑试验、英制摆试验和宽轮磨耗试验分别获得表面平均织构深度、防滑性和耐磨性。结果表明,在新拌混凝土表面(与交通方向平行或垂直)涂刷可显著改善路面的摩擦性能。该方法使英国钟摆数(BPN)和摩擦系数(平均)分别提高32%和38%。平行刷法的摩擦系数与垂直刷法相当(相差0.2%),而其耐磨性提高4%。因此,作为一项发现,就摩擦而言,平行刷是最推荐的纹理技术。一般来说,混凝土路面纹理会降低表面的耐磨性,但粗麻布的拖拽使该指标提高了2.5%。然而,由于对初始设置条件的高灵敏度,麻袋拖拽结果可能具有欺骗性。换句话说,所研究的测试方法的测量尺度相对于粗麻布拖曳法引起的凸起的尺度较小。
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An Investigation of the Relationship among Skid Resistance, Mean Texture Depth and Abrasion Resistance for Different Macrotextures of Concrete Pavements
Road accidents are one of the ten major causes of death in the world. Lack of enough friction and skid resistance of the pavement surface are known as important factors in traffic accidents. In this study, to evaluate the relationship between skid resistance and pavement surface macrotexture, five methods of creating macrotexture on concrete pavements were used. Sand Patch test, British Pendulum and Wide Wheel Abrasion tests were employed to obtain mean texture depth, skid resistance and abrasion resistance of the surface, respectively. Results showed that brushing on fresh concrete surface (parallel or perpendicular to the traffic direction) can improve frictional properties of pavement surface, drastically. This method increased British Pendulum Number (BPN) and friction coefficient by 32% and 38% (in average), respectively. Friction coefficient of parallel brushing was quite similar to perpendicular (0.2% discrepancy), while its abrasion resistance was 4% higher. Hence, as a finding, parallel brushing is the most recommended texturing technique in respect to friction. Generally, concrete pavement texturing decreases surface abrasion resistance, but burlap dragging improved this index by 2.5%. Nevertheless, burlap dragging results could be deceptive due to the high sensitivity to initial setup conditions. In other words, measurement scale of the studied testing procedures are small in respect to the scale of protuberances caused by burlap dragging method.
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来源期刊
CiteScore
1.30
自引率
60.00%
发文量
0
审稿时长
47 weeks
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