Long-Term Skid Resistance of Asphalt Surfacing and Aggregates' Mineralogical Composition: Generalisation to Pavements Made of Different Aggregate Types

Kane, Malal and Edmondson, Vikki (2020) Long-Term Skid Resistance of Asphalt Surfacing and Aggregates' Mineralogical Composition: Generalisation to Pavements Made of Different Aggregate Types. Wear, 454-55. p. 203339. ISSN 0043-1648

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Abstract

The work presented in this paper aims to find the relationship between the types of coarse aggregates used in asphaltmixes and the long-term skid resistance capacity of the resulting pavements. In builds on previous work whichproposed a relationship between the mineralogical composition of aggregates and the skid resistance of asphaltsurfacings in the long-term. Here, the focus of the inquiry is shifted from an asphalt surface of one type of aggregate toa mix of several types of aggregates. Polishing test and friction measurements were performed in the laboratory ondifferent pavement samples, followed by a mineralogical analysis of the coarse aggregates of these samples to definea new parameter termed “Averaged Aggregate Hardness Parameter”. The results found that this parameter correlateswell with the long-term skid resistance. Finally for practical use, the paper proposes analytical formulas to link the newpavement hardness parameter with the long-term skid resistance of pavements.

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