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Abstract
Epoxy asphalt curing system was prepared by sebacic acid compound with methyl-tetrahydrophthalic anhydride (MeTHPA) or Tung oil anhydride (TOA). Tensile strength, penetration, differential scanning calorimetry, dynamic mechanical thermal analysis, torn section microscopy photographs and scanning electron microscope analysis were utilised to investigate the mechanical properties, thermodynamic behaviour and micro-structure of epoxy asphalt curing systems under different curing agents. The results showed that in the presence of compound curing agent, the tensile strength and surface hardness of the epoxy asphalt curing system effectively improved, the induction period of the curing reaction decreased, the curing reaction mechanism turned to one-step reaction from two-step reaction, the Tg of asphalt phase and epoxy phase could simultaneously increase, and high-temperature damping performance also improved, but the particle size of asphalt dispersed in epoxy resin becomes uneven, while the curing system becomes semi-brittle from toughness. Compared to TOA, the effects of MeTHPA on such performance were more obvious.
Acknowledgements
The authors would like to express their appreciation to Education Key Laboratory for the Green Preparation and Application of Functional Materials for SEM and DSC analysis and thank for the financial support from the Young Talent Fund Project of Hubei Provincial Department of Education (No. Q201505) and the Applied Basic Research Project of Wuhan Science and Technology Bureau (Wuhan Intellectual Property Bureau) (No. 2014010101010015, 2015010202010096).
Disclosure statement
No potential conflict of interest was reported by the authors.