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Curing behavior and mechanical properties of an eco-friendly cold-mixed epoxy asphalt

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Abstract

Cold-mixed epoxy asphalt (CEA) is an eco-friendly material for steel bridge deck pavements. The effects of the asphalt on the curing behavior and mechanical properties of the CEA were studied. The pot life, curing characteristics, and curing kinetics of CEA blends were investigated by rotational viscosity testing, dynamic shear rheological analysis, and fluorescence microscopy. The results showed that the CEA pot life increased with asphalt content, and the curing apparent activation energy \( E_{k} \) of CEA-0.4 was more than two times higher than that of the epoxy resin. The curing reaction between the epoxy resin and curing agent was hindered by the asphalt. According to the FTIR and DSC results, the curing degree of the CEAs decreased with asphalt content. The elongation at break of the CEAs increased, while the tensile and adhesion strength decreased with asphalt content.

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Acknowledgements

The authors acknowledge the financial support from the Natural Science Foundation of Jiangsu Province (Grant No. BK20170885), the Fundamental Research Funds for the Central Universities (Grant No. 2017B00614), the Postdoctoral Research Foundation of China (Grant No. 2018M630504). Your financial support contributed in the success of this project, that is why we would like to take this special time to express our special thanks of gratitude.

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Correspondence to Xin Yu.

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Si, J., Li, Y. & Yu, X. Curing behavior and mechanical properties of an eco-friendly cold-mixed epoxy asphalt. Mater Struct 52, 81 (2019). https://doi.org/10.1617/s11527-019-1382-5

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Keywords

  • Cold-mixed epoxy asphalt
  • Curing behavior
  • Mechanical property
  • Micromorphology