{"title":"Rheological and microstructural properties of foamed epoxy asphalt","authors":"Xin Yu , Fuqiang Dong , Gongying Ding , Shengjie Liu , Shihui Shen","doi":"10.1016/j.conbuildmat.2016.03.179","DOIUrl":null,"url":null,"abstract":"<div><p>Epoxy asphalt has been extensively used in the bridge deck pavement. The main concerns during the construction process of epoxy asphalt are including high construction temperature, high viscosity to deal with and limited construction time which finally affects the service performance of the pavement. In this study, foamed epoxy asphalt is proposed to solve these construction challenges. The foamed epoxy asphalt samples were prepared by foaming machine at different foaming water content in the laboratory. The viscosity-temperature performance, failure temperature, ZSV@60<!--> <!-->°C, temperature sensitivity and storage stability were evaluated by rotational viscometer, temperature sweep, frequency sweep and storage tests. Fluorescence microscope and Infrared spectroscopy were utilized to characterize the morphology and chemical reaction change of non-foamed and foamed epoxy asphalt with different foaming water content. The results show that the addition of foaming water could improve the workability of foamed epoxy asphalt binder mixtures and prolong the allowable reserved time of construction process. Compared to non-foamed epoxy asphalt, foamed epoxy asphalt compromise failure temperature and viscosity@60<!--> <!-->°C and improve the temperature sensitivity and storage stability. With the increase of foaming water content, the failure temperature, viscosity@60<!--> <!-->°C and storage stability of foamed epoxy asphalt decrease at some extent, while the temperature sensitivity of foamed epoxy asphalt increases. According to the change of microstructure, the foaming water is beneficial to enhance the epoxy resin dispersion in the asphalt and promote the chemical reaction between epoxy resins and curing agent, which could improve the pavement performance of epoxy asphalt.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.conbuildmat.2016.03.179","citationCount":"42","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061816304834","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 42
Abstract
Epoxy asphalt has been extensively used in the bridge deck pavement. The main concerns during the construction process of epoxy asphalt are including high construction temperature, high viscosity to deal with and limited construction time which finally affects the service performance of the pavement. In this study, foamed epoxy asphalt is proposed to solve these construction challenges. The foamed epoxy asphalt samples were prepared by foaming machine at different foaming water content in the laboratory. The viscosity-temperature performance, failure temperature, ZSV@60 °C, temperature sensitivity and storage stability were evaluated by rotational viscometer, temperature sweep, frequency sweep and storage tests. Fluorescence microscope and Infrared spectroscopy were utilized to characterize the morphology and chemical reaction change of non-foamed and foamed epoxy asphalt with different foaming water content. The results show that the addition of foaming water could improve the workability of foamed epoxy asphalt binder mixtures and prolong the allowable reserved time of construction process. Compared to non-foamed epoxy asphalt, foamed epoxy asphalt compromise failure temperature and viscosity@60 °C and improve the temperature sensitivity and storage stability. With the increase of foaming water content, the failure temperature, viscosity@60 °C and storage stability of foamed epoxy asphalt decrease at some extent, while the temperature sensitivity of foamed epoxy asphalt increases. According to the change of microstructure, the foaming water is beneficial to enhance the epoxy resin dispersion in the asphalt and promote the chemical reaction between epoxy resins and curing agent, which could improve the pavement performance of epoxy asphalt.
期刊介绍：
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.
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