{"title":"A porous IPN-structured polyurethane/epoxy grouting material with low viscosity, high strength and low volume shrinkage","authors":"","doi":"10.1016/j.conbuildmat.2024.138312","DOIUrl":null,"url":null,"abstract":"<div><p>Epoxy based grouting materials should concern with low viscosity, high strength, rapid curing, and low shrinkage. A polyurethane/epoxy grouting material was prepared. Through formula design, its initial viscosity was reduced to below 200 mPa·s. The morphology observation confirmed its porous and IPN structure. Compared with pure EP, its tensile strength, compressive strength, and impact strength were increased by 87 %, 20 %, and 50 %, respectively, as well as the volume shrinkage was significantly reduced. The inherent strength of PU/epoxy resin grouting materials was significantly higher than that of concrete, even in humid environments, their bond strength was 3.26 MPa. The theoretical grout flow rate and diffusion radius at different stages of the grouting process were also determined, which achieved an excellent on-site grouting effect.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061824034548","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}
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Abstract
Epoxy based grouting materials should concern with low viscosity, high strength, rapid curing, and low shrinkage. A polyurethane/epoxy grouting material was prepared. Through formula design, its initial viscosity was reduced to below 200 mPa·s. The morphology observation confirmed its porous and IPN structure. Compared with pure EP, its tensile strength, compressive strength, and impact strength were increased by 87 %, 20 %, and 50 %, respectively, as well as the volume shrinkage was significantly reduced. The inherent strength of PU/epoxy resin grouting materials was significantly higher than that of concrete, even in humid environments, their bond strength was 3.26 MPa. The theoretical grout flow rate and diffusion radius at different stages of the grouting process were also determined, which achieved an excellent on-site grouting effect.
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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