Comprehensive evaluation of low-temperature properties of PPA/CR/SBS composite modified asphalt binder and its mixtures

Fucheng Guo; Ning Li; Songbai Lin; Bo Li; Zhenzheng Liu; Yongning Wang; Sheng Guo; Jing Zhao; Wenzhou Li

doi:10.1016/j.rineng.2025.106329

Results in Engineering (Sep 2025)

Comprehensive evaluation of low-temperature properties of PPA/CR/SBS composite modified asphalt binder and its mixtures

Fucheng Guo,
Ning Li,
Songbai Lin,
Bo Li,
Zhenzheng Liu,
Yongning Wang,
Sheng Guo,
Jing Zhao,
Wenzhou Li

Affiliations

Fucheng Guo: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Ning Li: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China; Gansu Highway Traffic Construction Group Co., Ltd, Lanzhou 730030, China
Songbai Lin: The Highway Development Center of Gansu Province, Lanzhou Gansu 730030, China; Corresponding authors.
Bo Li: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Zhenzheng Liu: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Yongning Wang: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Sheng Guo: Gansu Industry Technology Center of Transportation Construction Materials Research and Application, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Jing Zhao: Jilin China Railway Expressway Co., Ltd, Changchun Jilian 130052, China
Wenzhou Li: Gansu Highway Traffic Construction Group Co., Ltd, Lanzhou 730030, China; Corresponding authors.

DOI: https://doi.org/10.1016/j.rineng.2025.106329
Journal volume & issue: Vol. 27
p. 106329

Abstract

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Asphalt pavement in cold regions often suffer from serious cracking issues, which will greatly shorten its service life. Composite modification employing polyphosphoric acid (PPA), crumb rubber (CR), and styrene-butadiene-styrene block copolymer (SBS) offers an eco-friendly approach to enhancing low-temperature performance of asphalt binders. This study evaluated the low-temperature properties of various PPA/CR/SBS composite asphalt binder using bending beam rheometer (BBR) testing for binder and semi-circular bending (SCB) test for mixture. Moreover, the comprehensive evaluation was carried out using entropy weight-TOPSIS method. Results indicate that all composite-modified binders outperform SBS-modified asphalt binder in low-temperature rheological properties. Activated crumb rubber (ACR) markedly decreases the risk of low-temperature cracking, whereas PPA addition enhances performance but slightly increases the cracking risk. Fracture energy Gf exhibits stability and strong correlation (r > 0.83) with rheological indices. Notably, ACR/SBS-P demonstrates the best low-temperature performance among five types of composite binders evaluated.

Published in Results in Engineering

ISSN: 2590-1230 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology
Website: https://www.journals.elsevier.com/results-in-engineering

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