Analysis of the Frictional Performance Development of Recycled Stone Matrix Asphalt (Sma) Mixtures

Abstract

Pavement skid resistance is crucial for road safety, particularly under wet conditions, as it improves tire-road surface interaction and reduces accident risk. For sustainability development, this study investigated the impact of incorporating recycled components, especially reclaimed asphalt pavement (RAP) and engineering crumb rubber (ECR), into asphalt mixtures on their frictional performance. Such a goal was achieved by assessing the morphological properties of RAP compared to raw aggregates using the aggregate imaging measurement system (AIMS) technique at various Micro-Deval abrasion cycles. Furthermore, the friction properties of recycled asphalt mixtures were quantified by employing the dynamic friction tester (DFT) and circular track meter (CTMeter) in conjunction with a three-wheel polishing device (TWPD) to simulate traffic-induced polishing action. The aggregates testing results revealed that the RAP aggregates had morphological properties and abrasion resistance comparable or superior to limestone sources, indicating the potential for replacing raw limestone with RAP material. Regarding the frictional assessment of asphalt mixtures, dense-graded (DG) mixtures exhibited superior microtexture properties, as indicated by the DFT values at 20 km/hr (DFT20), compared to stone matrix asphalt (SMA) mixtures. Nonetheless, SMA mixtures, with their superior macrotexture, could provide satisfactory long-term frictional performance at high speeds, a finding supported by statistical analysis. The analysis revealed that traffic-induced polishing significantly affected surface microtexture but had minimal impact on macrotexture. Additionally, incorporating recycled components into asphalt mixtures increased friction performance by up to 15%. Finally, this study recommends the development of a detailed RAP processing protocol tailored to the sources and characteristics of RAP materials to optimize the use of recycled materials and enhance the sustainability of asphalt pavements.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

Missouri Department of Transportation, Grant TR202020-MST

Keywords and Phrases

Asphalt mix design and material selection; Frictional performance; Morphological properties; Recycled asphalt mixtures; Recycled components

International Standard Serial Number (ISSN)

2364-4184; 2364-4176

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Springer, All rights reserved.

Publication Date

01 Oct 2024

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