Sulfur modification with dipentene and ethylhexyl acrylate to enhance asphalt mixture performance
This study aimed to mitigate the insufficient moisture resistance and low-temperature crack resistance of sulfur modified asphalt mixture, the sulfur was modified using the dipentene (DIP) and ethylhexyl acrylate (EHA). The micro-morphologies and chemical compositions of the modified sulfur were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectrum (FTIR), Raman Spectroscopy, X-Ray Diffraction (XRD), and X-Ray Photoelectron Spectrum (XPS), and the modification mechanism of sulfur modified with DIP and EHA was revealed and illustrated. Based on the surface free energy (SFE) theory, the SFE parameters of the modified sulfur asphalt-binder and the mechanism of adhesion promotion for the DIP and EHA combination to sulfur were quantified. The high-temperature rheological and fatigue properties of the modified sulfur were analyzed using the Dynamic Shear Rheometer (DSR). Likewise, the Dynamic Uniaxial Test, Freeze-Thaw Splitting Test, Semi-Circular Bending Test (SCB), and Repeated Semi-Circular Bending Test (R-SCB) were used to study the effect of DIP and EHA on sulfur-modified asphalt mixture. The results showed that the DIP and EHA can effectively improve the connection between the sulfur molecules. When the DIP and EHA modified sulfur was used in asphalt mixture, its moisture resistance and low temperature crack resistance were substantially improved. In the meantime, the low-temperature performance of the modified asphalt-binder was improved, whilst the high-temperature performance and fatigue performance were still good. From the study results and findings, 1% DIP and 0.5% EHA were the optimal dosages for the sulfur modification, which significantly improved the moisture resistance and low-temperature crack resistance of the sulfur-modified asphalt mixture.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
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Supplemental Notes:
- © 2022 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
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Authors:
- Bai, Tao
- Wu, Fan
- Zhang, Yunfei
- Mao, Chunguang
- Wang, Gang
- Wu, Yanguang
- Bai, Hua
- Li, Yuanyuan
- Publication Date: 2022-8-8
Language
- English
Media Info
- Media Type: Web
- Features: Figures; Photos; References; Tables;
- Pagination: 128086
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Serial:
- Construction and Building Materials
- Volume: 343
- Issue Number: 0
- Publisher: Elsevier
- ISSN: 0950-0618
- Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1
Subject/Index Terms
- TRT Terms: Asphalt additives; Asphalt mixtures; Sulfur asphalt; Tests; Warm mix paving mixtures
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01856348
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 29 2022 9:27AM