1. Improving the compatibility of cold-mixed epoxy asphalt based on the epoxidized soybean oil.
- Author
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Si, Jingjing, Li, Yang, Wang, Junyan, Niyigena, Arsene Rodrigue, Yu, Xin, and Jiang, Ruiling
- Subjects
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ASPHALT , *EPOXY resins , *GLASS transition temperature , *DYNAMIC mechanical analysis , *ASPHALT modifiers , *SOY oil , *IRON & steel bridges - Abstract
• Epoxidized soybean oil (ESO) is introduced to prepare ESO modified cold-mixed epoxy asphalt (CEA-ESO) • Increasing ESO content will increase the compatibility of epoxy resin and asphalt. • Increasing ESO content will increase the elongation at break of cured CEA-ESO. Cold-mixed epoxy asphalt (CEA) has been used for paving steel bridges and high-grade roads because of its properties superiority and environmental protection. In order to obtain CEA with excellent performance, it is a significant mean to improve the compatibility between asphalt and epoxy resin (ER) by introducing epoxidized soybean oil (ESO). The viscosity and glass transition temperature (T g) decrease, and the asphalt dispersed more uniformly in the ER with increasing ESO concentration. Based on the dynamic mechanical analysis, the CEA-ESO30 shows only one T g and excellent compatibility between asphalt and ER. The elongation at break and storage modulus of CEA-ESO was higher than CEA, indicating that the flexible ESO molecular chain in the curing networks might improve the stiffness of CEA-ESO. The FTIR spectra exhibited that the ESO reacted with the curing agent to form 3D networks with ER, which may result in good compatibility between asphalt and ER. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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