Jie Gong , Ya Liu , Qingjun Wang , Zhonghua Xi , Jun Cai , Guowei Ding , Hongfeng Xie
{"title":"温拌沥青添加剂改性环氧沥青橡胶的性能评价","authors":"Jie Gong , Ya Liu , Qingjun Wang , Zhonghua Xi , Jun Cai , Guowei Ding , Hongfeng Xie","doi":"10.1016/j.conbuildmat.2019.01.197","DOIUrl":null,"url":null,"abstract":"<div><p>The utilization of crumb rubber to produce asphalt rubber (AR) for asphalt mixture pavement has been proven to be an economical and environmental way for the disposal of waste tires. As one of the most significant thermosetting polymer modified asphalt with prominent performances, epoxy asphalt (EA) has been widely used on the pavement of steel bridge decks. In present study, the mixture of epoxy oligomer and curing agent was incorporated into AR to prepare epoxy asphalt rubber (EAR). To lower the viscosity of AR, a WMA additive, Sasobit was introduced into AR to prepare Sasobit modified EARs. The effects of Sasobit on the rotational viscosity, glass transition temperature (<em>T</em><sub>g</sub>), damping performance, mechanical properties and phase-separated morphology of the neat EAR were investigated. The inclusion of Sasobit significantly decreased the viscosity of the neat EAR during the whole curing process and prolonged the operational lifetime for asphalt mixture pavement. The addition of Sasobit slightly decreased the <em>T</em><sub>g</sub> of the neat EAR. The <em>T</em><sub>g</sub> of Sasobit modified EARs decreased with WMA additive content increasing. Meanwhile, the presence of Sasobit improved the damping properties of the neat EAR. The existence of Sasobit enhanced the mechanical properties of the neat EAR at lower WMA additive concentration. The mechanical properties of Sasobit modified EARs decreased with increasing WMA additive content. Morphological observations revealed that the phase-separated microstructures of the neat EAR consisted of the dispersed spherical and co-continuous AR particles and the continuous epoxy phase. The existence of Sasobit decreased the number of co-continuous AR particles in the epoxy matrix. In addition, the number of co-continuous AR particles decreased with increasing WMA additive content. The presence of Sasobit decreased the average diameter of the dispersed AR particles and area fraction of AR domains in the neat EAR.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2019-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.conbuildmat.2019.01.197","citationCount":"70","resultStr":"{\"title\":\"Performance evaluation of warm mix asphalt additive modified epoxy asphalt rubbers\",\"authors\":\"Jie Gong , Ya Liu , Qingjun Wang , Zhonghua Xi , Jun Cai , Guowei Ding , Hongfeng Xie\",\"doi\":\"10.1016/j.conbuildmat.2019.01.197\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The utilization of crumb rubber to produce asphalt rubber (AR) for asphalt mixture pavement has been proven to be an economical and environmental way for the disposal of waste tires. As one of the most significant thermosetting polymer modified asphalt with prominent performances, epoxy asphalt (EA) has been widely used on the pavement of steel bridge decks. In present study, the mixture of epoxy oligomer and curing agent was incorporated into AR to prepare epoxy asphalt rubber (EAR). To lower the viscosity of AR, a WMA additive, Sasobit was introduced into AR to prepare Sasobit modified EARs. The effects of Sasobit on the rotational viscosity, glass transition temperature (<em>T</em><sub>g</sub>), damping performance, mechanical properties and phase-separated morphology of the neat EAR were investigated. The inclusion of Sasobit significantly decreased the viscosity of the neat EAR during the whole curing process and prolonged the operational lifetime for asphalt mixture pavement. The addition of Sasobit slightly decreased the <em>T</em><sub>g</sub> of the neat EAR. The <em>T</em><sub>g</sub> of Sasobit modified EARs decreased with WMA additive content increasing. Meanwhile, the presence of Sasobit improved the damping properties of the neat EAR. The existence of Sasobit enhanced the mechanical properties of the neat EAR at lower WMA additive concentration. The mechanical properties of Sasobit modified EARs decreased with increasing WMA additive content. Morphological observations revealed that the phase-separated microstructures of the neat EAR consisted of the dispersed spherical and co-continuous AR particles and the continuous epoxy phase. The existence of Sasobit decreased the number of co-continuous AR particles in the epoxy matrix. In addition, the number of co-continuous AR particles decreased with increasing WMA additive content. The presence of Sasobit decreased the average diameter of the dispersed AR particles and area fraction of AR domains in the neat EAR.</p></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2019-04-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.conbuildmat.2019.01.197\",\"citationCount\":\"70\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061819302284\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061819302284","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}
The utilization of crumb rubber to produce asphalt rubber (AR) for asphalt mixture pavement has been proven to be an economical and environmental way for the disposal of waste tires. As one of the most significant thermosetting polymer modified asphalt with prominent performances, epoxy asphalt (EA) has been widely used on the pavement of steel bridge decks. In present study, the mixture of epoxy oligomer and curing agent was incorporated into AR to prepare epoxy asphalt rubber (EAR). To lower the viscosity of AR, a WMA additive, Sasobit was introduced into AR to prepare Sasobit modified EARs. The effects of Sasobit on the rotational viscosity, glass transition temperature (Tg), damping performance, mechanical properties and phase-separated morphology of the neat EAR were investigated. The inclusion of Sasobit significantly decreased the viscosity of the neat EAR during the whole curing process and prolonged the operational lifetime for asphalt mixture pavement. The addition of Sasobit slightly decreased the Tg of the neat EAR. The Tg of Sasobit modified EARs decreased with WMA additive content increasing. Meanwhile, the presence of Sasobit improved the damping properties of the neat EAR. The existence of Sasobit enhanced the mechanical properties of the neat EAR at lower WMA additive concentration. The mechanical properties of Sasobit modified EARs decreased with increasing WMA additive content. Morphological observations revealed that the phase-separated microstructures of the neat EAR consisted of the dispersed spherical and co-continuous AR particles and the continuous epoxy phase. The existence of Sasobit decreased the number of co-continuous AR particles in the epoxy matrix. In addition, the number of co-continuous AR particles decreased with increasing WMA additive content. The presence of Sasobit decreased the average diameter of the dispersed AR particles and area fraction of AR domains in the neat EAR.
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.