文献类型：期刊文献

英文题名：Preparation, microstructures and properties of shape memory hydrogenated epoxy resin-modified emulsified asphalt

作者：Li, Zhibin Xu, Tao Liu, Song Zhang, Wenli Gan, Xinli

第一作者：Li, Zhibin

通信作者：Xu, T[1]

机构：[1]Nanjing Forestry Univ, Coll Civil Engn, Nanjing, Jiangsu, Peoples R China;[2]Guizhou Inst Technol, Sch Transportat Engn, Guiyang, Guizhou, Peoples R China

第一机构：Nanjing Forestry Univ, Coll Civil Engn, Nanjing, Jiangsu, Peoples R China

通信机构：corresponding author), Nanjing Forestry Univ, Coll Civil Engn, Nanjing, Jiangsu, Peoples R China.

年份：2024

卷号：25

期号：1

外文期刊名：INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING

收录：;EI(收录号：20240815616597);Scopus(收录号：2-s2.0-85185491853);WOS:【SCI-EXPANDED(收录号:WOS:001169723900001)】；

基金：The authors would like to thank the financial support from the National Natural Science Foundation of China, China [grant number 52278452], and the Jiangsu Provincial Department of Education for the Qing Lan Project, China.

语种：英文

外文关键词：Hydrogenated epoxy resin; emulsified asphalt; strengthening mechanism; toughening mechanism; microstructure changes; shape memory property

摘要：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.