Proposal for a New Method for Evaluating Polymer-Modified Bitumen Fatigue and Self-Restoration Performances Considering the Whole Damage Characteristic Curve

Songtao Lv; Dongdong Ge; Shihao Cao; Dingyuan Liu; Wenhui Zhang; Cheng-Hui Li; Milkos Borges Cabrera

doi:10.3390/polym16192782

Polymers (Sep 2024)

Proposal for a New Method for Evaluating Polymer-Modified Bitumen Fatigue and Self-Restoration Performances Considering the Whole Damage Characteristic Curve

Songtao Lv,
Dongdong Ge,
Shihao Cao,
Dingyuan Liu,
Wenhui Zhang,
Cheng-Hui Li,
Milkos Borges Cabrera

Affiliations

Songtao Lv: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
Dongdong Ge: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
Shihao Cao: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
Dingyuan Liu: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
Wenhui Zhang: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China
Cheng-Hui Li: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Milkos Borges Cabrera: School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China

DOI: https://doi.org/10.3390/polym16192782
Journal volume & issue: Vol. 16, no. 19
p. 2782

Abstract

Read online

Fatigue performance and self-repairing activity of asphalt binders are two properties that highly influence the fatigue cracking response of asphalt pavement. There are still numerous gaps in knowledge to fill linked with these two characteristics. For instance, current parameters fail to accommodate these two bitumen phenomena fully. This study aims to propose a new procedure to address this issue utilizing the linear amplitude sweep (LAS) test, LAS with rest period (RP) (LASH) test, and simplified viscoelastic continuum damage (S-VECD) model. This research work used four different types of asphalt binders: neat asphalt (NA), self-healing thermoplastic polyurethane (STPU)-modified bitumen (STPB), self-healing poly (dimethyl siloxane) crosslinked with urea bond (IPA1w)-modified bitumen (IPAB), and styrene–butadiene–styrene (SBS)-modified bitumen (SBSB). Before the testing process, all the materials were subjected to short-term and long-term aging. The new procedure showed a superior capacity to analyze and accommodate all bitumen fatigue performances and self-repairing activities compared to the current method. Another finding proved that asphalt binders with a higher self-restoration behavior failed to show a better fatigue performance. Moreover, the higher fatigue performance increments produced by STPU and IPA1w in NA concerning the control bitumen were 123.7% and 143.7%, respectively. Those values were obtained with 1.0% STPU and 0.5% IPA1w in NA. A breakthrough finding demonstrated that asphalt binder fatigue response is augmented when the RP was applied at a higher damage intensity (S) value. STPB and IPAB reached their highest increments of fatigue response, containing 1.0% of STPU and 0.5% of IPA1w, respectively. Those augmentations were 207.54% and 232.64%, respectively.

Published in Polymers

ISSN: 2073-4360 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/polymers/

About the journal

Abstract

Keywords