Preparation and properties of magnesium silicate cement with magnesium slag extracted lithium from salt lake

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-03-10 DOI:10.1016/j.conbuildmat.2025.140750

Zhichao Zhang , Ying Hua , Jing Wen , Zhen Li , Jueshi Qian

{"title":"Preparation and properties of magnesium silicate cement with magnesium slag extracted lithium from salt lake","authors":"Zhichao Zhang , Ying Hua , Jing Wen , Zhen Li , Jueshi Qian","doi":"10.1016/j.conbuildmat.2025.140750","DOIUrl":null,"url":null,"abstract":"<div><div>Using a lithium-extracted magnesium slag (LeMS) as magnesium source in magnesium silicate cement (MSC) preparation has the potential to reduce manufacturing costs and alleviate the environmental impact of LeMS. This study explored the possibility of completely replacing the frequently used light-burned magnesium oxide with LeMS containing magnesium hydroxide. The primary properties of MSC prepared from LeMS were tested and then the hydration products and microstructure were investigated using methods XRD, TG-DTG, FTIR, and SEM. A magnesia-bearing material from calcining LeMS and a brucite-bearing material from hydrated light-burned MgO were used as the magnesia component of MSC compared with LeMS. It is shown that LeMS can be used directly to prepare MSC together with silica fume. The strengths at 3d and 28d of MSC from LeMS were 11.1 MPa and 39.3 MPa respectively, higher than those of MSC from magnesia-bearing and brucite-bearing materials. MSC prepared from LeMS had relatively low apparent density and pH. The main hydration products of MSC prepared from LeMS were M-S-H gels, consistent with the previous research results, and formed much more at earlier age compared to MSC prepared from the other two materials. The relatively homogeneous, less pore microstructure and the higher hydrated degree of MSC prepared from LeMS resulted in higher strength. It is illustrated that LeMS can be used completely as the magnesian component of MSC. It is suggested that the utilization of LeMS in manufacturing MSC is one of the potential ways.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"471 ","pages":"Article 140750"},"PeriodicalIF":7.4000,"publicationDate":"2025-03-10","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/S0950061825008980","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

Using a lithium-extracted magnesium slag (LeMS) as magnesium source in magnesium silicate cement (MSC) preparation has the potential to reduce manufacturing costs and alleviate the environmental impact of LeMS. This study explored the possibility of completely replacing the frequently used light-burned magnesium oxide with LeMS containing magnesium hydroxide. The primary properties of MSC prepared from LeMS were tested and then the hydration products and microstructure were investigated using methods XRD, TG-DTG, FTIR, and SEM. A magnesia-bearing material from calcining LeMS and a brucite-bearing material from hydrated light-burned MgO were used as the magnesia component of MSC compared with LeMS. It is shown that LeMS can be used directly to prepare MSC together with silica fume. The strengths at 3d and 28d of MSC from LeMS were 11.1 MPa and 39.3 MPa respectively, higher than those of MSC from magnesia-bearing and brucite-bearing materials. MSC prepared from LeMS had relatively low apparent density and pH. The main hydration products of MSC prepared from LeMS were M-S-H gels, consistent with the previous research results, and formed much more at earlier age compared to MSC prepared from the other two materials. The relatively homogeneous, less pore microstructure and the higher hydrated degree of MSC prepared from LeMS resulted in higher strength. It is illustrated that LeMS can be used completely as the magnesian component of MSC. It is suggested that the utilization of LeMS in manufacturing MSC is one of the potential ways.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

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.