Methods to Evaluate the Aging Grades of Reclaimed Asphalt Binder

Changjiang Kou; Peng Xiao; Aihong Kang; Peter Mikhailenko; Hassan Baaj; Zhengguang Wu

doi:10.3390/app7121209

Applied Sciences (Nov 2017)

Methods to Evaluate the Aging Grades of Reclaimed Asphalt Binder

Changjiang Kou,
Peng Xiao,
Aihong Kang,
Peter Mikhailenko,
Hassan Baaj,
Zhengguang Wu

Affiliations

Changjiang Kou: Department of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
Peng Xiao: Department of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
Aihong Kang: Department of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China
Peter Mikhailenko: Department of Civil and Environmental Engineering, University of Waterloo, Waterloo N2L 3G1, ON, Canada
Hassan Baaj: Department of Civil and Environmental Engineering, University of Waterloo, Waterloo N2L 3G1, ON, Canada
Zhengguang Wu: Department of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China

DOI: https://doi.org/10.3390/app7121209
Journal volume & issue: Vol. 7, no. 12
p. 1209

Abstract

Read online

The use of reclaimed asphalt pavement (RAP) is of great significance for alleviating the problem of resource waste and land space occupation in the context of asphalt pavement. However, the use rate of RAP is still low in many countries because of limited understanding and no unified recycling guidelines, especially in terms of materials classification and aging grades. In this study, reclaimed asphalt pavements from sixteen different sections in southern China were collected, including with base and polymer modified asphalt (PMA). The performance of the reclaimed asphalt binder (RAB) at low, average and high temperatures was tested, using various methods, to find suitable indexes for categorizing aging grades. The viscosity (135 °C) and penetration (25 °C) were found to distinguish the aging degree of RAB the most consistently, and served as the indices to classify the RAB into different grades. To simplify the evaluation of aging grades, a comprehensive service life was determined using the Analytic Hierarchy Process, taking service years and surface levels into account. As a result, a good correlation was found between comprehensive service life and the aging grades.

Published in Applied Sciences

ISSN: 2076-3417 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General); Science: Biology (General); Science: Physics; Science: Chemistry
Website: http://www.mdpi.com/journal/applsci

About the journal

Abstract

Keywords