Polyether- and Polystyrene-Modified Polymeric Cationic Asphalt Emulsifiers: Synthesis and Performance
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 7
Abstract
Two novel polymeric cationic asphalt emulsifiers modified respectively by polyoxyethylene ether [named as polyether-type cationic asphalt emulsifier (PEAE)] and polystyrene [named as polystyrene-type cationic asphalt emulsifier (PSAE)] via free radical polymerization were synthesized by using cumene hydrogen peroxide as the initiator and 3-mercaptopropionic acid as the chain transfer agent. The investigation was conducted on the effects of polyoxyethylene ether dosage, initiator dosage, monomer molar ratio, acid/amine ratio, emulsifier dosage, and pH value on the high- and low-temperature performance of emulsified asphalt and storage stability at room temperature. The molecular structures of emulsifiers were characterized using Fourier transform infrared spectroscopy (FT-IR), and their surface activity and emulsifying performance were evaluated. The results demonstrate that the indexes of PEAE and PSAE satisfied the Chinese national standard regulations, and displayed excellent emulsifying capacity, low-temperature performance, and storage stability at room temperature. Both emulsifiers belong to slow cracking cationic asphalt emulsifiers. PEAE and PSAE can reduce the side effect of traditional small molecular cationic asphalt emulsifier on the low-temperature ductility of emulsified asphalt and improve the low-temperature performance of emulsified asphalt. PSAE was found to serve as an asphalt modifier and could improve the high-temperature performance of emulsified asphalt. The emulsified asphalt prepared using PEAE and PSAE shows promising applications in slurry seal coat construction and microsurface treatment. It is conducive to solving the problem that the traditional small molecular cationic asphalt emulsifier has large negative effect on the low-temperature performance of emulsified asphalt, which can open the window of the subsequent synthesis of polymeric cationic asphalt emulsifiers.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors thank the financial support by Shandong Provincial Key Research and Development Plan (No. 2017GGX20128) of China.
Author contributions: Xiao Lu: Investigation, writing original draft. Xinde Tang: Conceptualization, supervision, writing original draft. Xiaodong Chen: Writing review and editing. Cuizhen Zhang: Writing review and editing. Xuefan Li: Investigation. Haichao Guo: Investigation. Laixue Pang: Investigation. Fuying Dong: Conceptualization, methodology.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 7 • July 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jul 6, 2022
Accepted: Nov 9, 2022
Published online: Apr 24, 2023
Published in print: Jul 1, 2023
Discussion open until: Sep 24, 2023
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