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Abstract

In order to improve the pavement performance at micro-surface, waterborne epoxy resin was used to modify the emulsified asphalt, and the compatibility, microstructure, mechanical properties, rheological properties, and pavement performance of mixtures of the modified emulsified asphalt were studied. The storage stability test shows that the epoxy emulsion has good compatibility with emulsified asphalt. With the increase in waterborne epoxy resin content, the modified emulsified asphalt tends to form an epoxy resin-dominated skeleton structure. At the same time, with the increase in waterborne epoxy resin content, the adhesion and mechanical properties of emulsified asphalt and aggregate are significantly improved. At 20% content, the bonding strength is increased by more than two times, and the shear strength is increased by more than one time. Rheological tests show that the waterborne epoxy resin can improve the rutting resistance and elastic recovery rate of emulsified asphalt, and the high temperature performance is significantly improved. The research on the performance of the mixture at the micro-surface shows that the waterborne epoxy resin can significantly improve the water stability and rutting resistance of the emulsified asphalt, and the water stability and rutting resistance of the mixture tend to be stable when the content reaches 20%. In summary, for the modified emulsified asphalt system in this paper, it is recommended that the content of waterborne epoxy resin should be 10%–20%.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.038

First Page

215

Last Page

220

Submission Date

March 2025

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