{"title":"Effect of boric acid and triethanolamine compound on early hydration properties of magnesium potassium phosphate cement","authors":"","doi":"10.1016/j.conbuildmat.2024.138364","DOIUrl":null,"url":null,"abstract":"<div><p>To enhance the early performance of magnesium potassium phosphate cement (MKPC) and compensate for loose of compressive strength caused by the addition of boric acid (BA), triethanolamine (TEA) was incorporated in this work. This research was demonstrated that TEA hindered the dissolution of MgO and formed a complex with potassium ions, as evidenced by tests including compressive strength, hydration heat analysis, microstructure analysis, conductivity, and ion concentration. Furthermore, the study demonstrated that the addition of 2 wt% BA and 2 wt% TEA to MKPC resulted in a significant improvement in its characteristics, while only minimally affecting its early compressive strength. The compound was found to extend the setting time and enhance fluidity by 200 % and 32 % respectively, while also inhibiting the formation of K-type struvite. The hydration product type of MKPC did not change, and MKPC can reach an early compressive strength of 42.52 MPa at 24 h, only experiencing a slight reduction of 1.78 %.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2024-09-19","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/S0950061824035062","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: 0
Abstract
To enhance the early performance of magnesium potassium phosphate cement (MKPC) and compensate for loose of compressive strength caused by the addition of boric acid (BA), triethanolamine (TEA) was incorporated in this work. This research was demonstrated that TEA hindered the dissolution of MgO and formed a complex with potassium ions, as evidenced by tests including compressive strength, hydration heat analysis, microstructure analysis, conductivity, and ion concentration. Furthermore, the study demonstrated that the addition of 2 wt% BA and 2 wt% TEA to MKPC resulted in a significant improvement in its characteristics, while only minimally affecting its early compressive strength. The compound was found to extend the setting time and enhance fluidity by 200 % and 32 % respectively, while also inhibiting the formation of K-type struvite. The hydration product type of MKPC did not change, and MKPC can reach an early compressive strength of 42.52 MPa at 24 h, only experiencing a slight reduction of 1.78 %.
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.