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Evaluation of the polishing resistance characteristics of fine and coarse aggregate for asphalt pavement using Wehner/Schulze test

机译：使用Wehner / Schulze试验评估沥青路面的细骨料和粗骨料的耐抛光性

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Traffic safety is influenced strongly by the skid resistance of pavements. Moreover, the long-term skid resistance of pavements depends mainly on the polishing resistance of the specific aggregate present on the surface. The polishing resistance is a measure which describes the roughness of aggregate after a polishing load has been induced by traffic loads. Specifications for the polishing resistance of aggregate are given only for coarse aggregate. However, given the various mixture types it is questionable if the fraction of fine aggregate (up to 55 M.-%) ought to be neglected, particularly since the polishing resistance of fine aggregate is higher than that of coarse aggregate. This paper aims to quantify the polishing resistance of various aggregate size fractions with particular focus on the properties of fine aggregate, and to demonstrate the suitability of the Wehner/Schulze test (W/S) in this regard. The results show that the initial skid resistance and the polishing resistance of fine aggregate are generally greater than that of coarse aggregate. It is notable that the initial skid resistance decrease is far more pronounced for fine aggregate. The polishing resistance does not exhibit a uniform development across all aggregate sizes. It is to be expected that fine aggregate may play a significant role for the skid resistance of asphalt pavements; however only coarse aggregate is considered in the design process. Further research is needed to precisely determine the effect of fine aggregate to allow for more economically feasible pavement designs. (C) 2017 Elsevier Ltd. All rights reserved.
机译：人行道的防滑性极大地影响了交通安全。而且，人行道的长期防滑性主要取决于表面上存在的特定骨料的耐抛光性。耐抛光性是描述在交通负荷引起抛光负荷后骨料的粗糙度的量度。仅针对粗骨料给出骨料的耐抛光性规格。然而，考虑到各种混合物类型，是否应该忽略细骨料的比例（高达55M .-％）是有问题的，特别是因为细骨料的抛光阻力高于粗骨料的抛光阻力。本文旨在量化各种骨料粒度级分的耐抛光性，特别关注细骨料的性能，并论证Wehner / Schulze试验（W / S）在这方面的适用性。结果表明，细骨料的初始抗滑性和抗磨性通常大于粗骨料。值得注意的是，细集料的初始抗滑性降低更为明显。耐抛光性在所有骨料尺寸上均未显示出均匀的发展。可以预料，细骨料可能对沥青路面的防滑性起重要作用。但是在设计过程中只考虑粗骨料。需要进行进一步的研究以精确确定细骨料的效果，以实现更经济可行的路面设计。 （C）2017 Elsevier Ltd.保留所有权利。

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