https://orcid.org/0000-0002-0851-3746
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ABSTRACT
To improve the mechanical, anti-ageing and shape memory properties of emulsified asphalt, a new shape memory hydrogenated epoxy resin (SMHE) modified emulsified asphalt (SHEA) was developed and its modification mechanism was revealed. Effects of SMHE on microstructures and chemical compositions of evaporated residues (ER) were studied, as well as rheological and shape memory properties of ER were evaluated. The results show that SHEA is successfully prepared by first emulsification and then modification method and the basic pavement properties of SHEA meet current technical specification requirements. Also, SMHE is well dispersed in ER and an interpenetrated structure is formed. When the SMHE dosage is 6%, the thermal stability and microthermal toughness of SHEA are well improved, and the shape recovery ability of molecular chain segments in SMHE is also increased so that deformation resistance and anti-crack of SHEA are improved. Finally, the chemical reactions occur in the curing process of SMHE system in SHEA, and then the SMHE system is physically cross-linked with ER. The strength, toughness and shape memory properties of ER are enhanced by a suitable SMHE dosage of 6%. This study improves various properties of emulsified asphalt, and understands strengthening and toughening mechanisms of SMHE on emulsified asphalt.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Data availability statement
No data was used for the research described in the article.