Materials and Structures

, Volume 49, Issue 1–2, pp 241–247 | Cite as

Molecular simulations and experimental evaluation on the curing of epoxy bitumen

Original Article

Abstract

To more fundamentally understand the curing process of the epoxy modified bitumen (EMB), this study used the molecular dynamics simulation and the first principles to investigate the molecular movement and the structural change during the curing. The Fourier transform infrared spectroscopy, fluoroscopes microscopy and dynamic shear rheometer were used to characterize the chemical, structural and rheological properties. The simulation and experimental results indicated that: the diffusion speeds decreased in order of aromatics, saturates, epoxy and asphaltenes in the EMB at a typical curing temperature of 120 °C; during the curing process, epoxy can easily move to aromatics and saturates; according to first principle, the covalent binding between epoxy and bitumen formed during the curing process, and calculated bond-length was very close to the experimental value; the curing efficiency decreased with the increase of the epoxy resin content; a clear network structure at a high content of 20 wt% epoxy resin can be clearly observed; the epoxy modification can improve the high-temperature deformation resistance.

Keywords

Epoxy Bitumen Curing Molecular dynamics simulation First principle 

Notes

Acknowledgments

The authors are grateful for the financial supports from the National Key Scientific Apparatus Development Program (No. 2013YQ160501) and National Project of Scientific and Technical Supporting Program (No. 2011BAE28B03) of the Ministry of Science and Technology of China, and National Basic Research Program of China (973 Program No. 2014CB932104).

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Copyright information

© RILEM 2014

Authors and Affiliations

  1. 1.State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhanChina

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