露石混凝土长期抗滑性能研究

Research on Long-term Anti-Sliding Performance of Exposed Aggregate Cement Concrete

为探究露石混凝土的长期抗滑性能,基于室内加速磨耗试验,针对不同的集料类型、集料级配、集料粒径,测试磨耗前后以及不同磨耗时间的构造深度、抗滑值,研究了露石混凝土长期的抗滑性能及抗滑性能的衰减规律.试验表明:酸性集料(如花岗岩)较碱性集料(如石灰岩)具有更优异的长期抗滑性能;单一粒径的集料的长期抗滑性能优于级配集料;粒径越大,长期抗滑性能越优良;露石混凝土的抗滑性能优于SMA等沥青混合料,特别是酸性集料的露石混凝土;构造深度0.8~1.2 mm时,抗滑性能最优.

In order to explore the long-term anti-sliding performance of exposed aggregate cement concrete,based on the indoor accelerated wear test,the texture depth and BPN of exposed aggregate cement concrete before being worn and after being worn were tested for different aggregate types,aggregate gradations and aggregate sizes.The long-term anti-sliding performance and anti-sliding performance degradation of exposed aggregate cement concrete were studied.The result showed that the acidic aggregate(such as granite)has more excellent long-term anti-sliding performance than alkaline aggregate(such as limestone);the bigger particle size is,the more excellent long-term anti-sliding performance is;the long-term anti-sliding performance of exposed aggregate cement concrete was better than that of asphalt mixtures(such as SMA);when the texture depth of exposed aggregate cement concrete is 0.8~1.2 mm,the anti-sliding performance was best.