Jie Ji , Qingwen Shi , Ran Zhang , Zhi Suo , Jiani Wang
{"title":"水性环氧沥青的粘度、力学性能和相分离形态","authors":"Jie Ji , Qingwen Shi , Ran Zhang , Zhi Suo , Jiani Wang","doi":"10.1016/j.conbuildmat.2022.127074","DOIUrl":null,"url":null,"abstract":"<div><p>This study aimed to investigate the viscosity, mechanical properties, and phase-separated morphology of waterborne epoxy asphalt (WEA). Adopting waterborne epoxy resin as the modifier, the rigid and flexible WEA with admixture amounts of 10 wt%, 20 wt% and 30 wt% were prepared by first emulsifying and then modifying. The Brookfield viscosity test and the tensile test were conducted to evaluate the viscosity, tensile strength, and ductility of WEAs. The phase-separated morphology of WEA were analyzed using the laser scanning confocal microscopy (LSCM) and image analysis software Image-Pro Plus. It was found that the viscosity of most WEAs increased with time. The best compaction time for WEA is 4–5 h after curing. With the addition of waterborne epoxy resin, WEA gradually changed from a continuous asphalt phase and a dispersed phase of cured epoxy resin to a three-dimensional network structure with the two-phase structure of asphalt and cured epoxy. This promoted a substantial increase in the viscosity and tensile strength of rigid WEA and a decrease in ductility. However, due to the rigidity of the cured products of flexible epoxy resin, the ductility of flexible WEA was significantly improved. Nevertheless, the increase in viscosity and tensile strength of flexible WEA was lower than that of rigid WEA. Different types of emulsifiers also had different effects on the viscosity, mechanical properties, and phase-separated morphology of WEA. The area ratio and average diameter of epoxy resin particles can be used as microscopic indicators to evaluate the influence of epoxy resin dosage on the viscosity, tensile strength, and ductility of WEA. Based on the macro and micro performance of WEA, the findings recommend A3T1 rigid WEA with 10–30 wt% waterborne epoxy resin and LBP1 rigid WEA with 30 wt% waterborne epoxy resin.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"Viscosity, mechanical properties and phase-separated morphology of waterborne epoxy asphalt\",\"authors\":\"Jie Ji , Qingwen Shi , Ran Zhang , Zhi Suo , Jiani Wang\",\"doi\":\"10.1016/j.conbuildmat.2022.127074\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study aimed to investigate the viscosity, mechanical properties, and phase-separated morphology of waterborne epoxy asphalt (WEA). Adopting waterborne epoxy resin as the modifier, the rigid and flexible WEA with admixture amounts of 10 wt%, 20 wt% and 30 wt% were prepared by first emulsifying and then modifying. The Brookfield viscosity test and the tensile test were conducted to evaluate the viscosity, tensile strength, and ductility of WEAs. The phase-separated morphology of WEA were analyzed using the laser scanning confocal microscopy (LSCM) and image analysis software Image-Pro Plus. It was found that the viscosity of most WEAs increased with time. The best compaction time for WEA is 4–5 h after curing. With the addition of waterborne epoxy resin, WEA gradually changed from a continuous asphalt phase and a dispersed phase of cured epoxy resin to a three-dimensional network structure with the two-phase structure of asphalt and cured epoxy. This promoted a substantial increase in the viscosity and tensile strength of rigid WEA and a decrease in ductility. However, due to the rigidity of the cured products of flexible epoxy resin, the ductility of flexible WEA was significantly improved. Nevertheless, the increase in viscosity and tensile strength of flexible WEA was lower than that of rigid WEA. Different types of emulsifiers also had different effects on the viscosity, mechanical properties, and phase-separated morphology of WEA. The area ratio and average diameter of epoxy resin particles can be used as microscopic indicators to evaluate the influence of epoxy resin dosage on the viscosity, tensile strength, and ductility of WEA. Based on the macro and micro performance of WEA, the findings recommend A3T1 rigid WEA with 10–30 wt% waterborne epoxy resin and LBP1 rigid WEA with 30 wt% waterborne epoxy resin.</p></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2022-06-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061822007577\",\"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/S0950061822007577","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}
Viscosity, mechanical properties and phase-separated morphology of waterborne epoxy asphalt
This study aimed to investigate the viscosity, mechanical properties, and phase-separated morphology of waterborne epoxy asphalt (WEA). Adopting waterborne epoxy resin as the modifier, the rigid and flexible WEA with admixture amounts of 10 wt%, 20 wt% and 30 wt% were prepared by first emulsifying and then modifying. The Brookfield viscosity test and the tensile test were conducted to evaluate the viscosity, tensile strength, and ductility of WEAs. The phase-separated morphology of WEA were analyzed using the laser scanning confocal microscopy (LSCM) and image analysis software Image-Pro Plus. It was found that the viscosity of most WEAs increased with time. The best compaction time for WEA is 4–5 h after curing. With the addition of waterborne epoxy resin, WEA gradually changed from a continuous asphalt phase and a dispersed phase of cured epoxy resin to a three-dimensional network structure with the two-phase structure of asphalt and cured epoxy. This promoted a substantial increase in the viscosity and tensile strength of rigid WEA and a decrease in ductility. However, due to the rigidity of the cured products of flexible epoxy resin, the ductility of flexible WEA was significantly improved. Nevertheless, the increase in viscosity and tensile strength of flexible WEA was lower than that of rigid WEA. Different types of emulsifiers also had different effects on the viscosity, mechanical properties, and phase-separated morphology of WEA. The area ratio and average diameter of epoxy resin particles can be used as microscopic indicators to evaluate the influence of epoxy resin dosage on the viscosity, tensile strength, and ductility of WEA. Based on the macro and micro performance of WEA, the findings recommend A3T1 rigid WEA with 10–30 wt% waterborne epoxy resin and LBP1 rigid WEA with 30 wt% waterborne epoxy resin.
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.