{"title":"Preparation and properties of clinker-free cement based on lithium slag and quicklime","authors":"Yu Zhu, Songzhe Zhou, Zhaocai Zhang","doi":"10.1617/s11527-025-02720-y","DOIUrl":null,"url":null,"abstract":"<div><p>In order to reduce the environmental harm caused by the production of traditional cement, the feasibility of preparation for clinker-free cement based on lithium slag and quicklime was investigated in this paper. Meanwhile, the effect of Na<sub>2</sub>SO<sub>4</sub> on the reactivity of lithium slag was studied. The hydration degree, hydration products and microstructure of clinker-free cement paste were analyzed by FTIR, XRD, TG-DTG, NMR, and SEM, respectively. The results indicate that lithium slag itself does not have the ability to hydrate. However, the clinker-free cement paste prepared with lithium slag can harden after adding quicklime, due to the formation of hydration products C–(A)–S–H gel and AFt. Adding Na<sub>2</sub>SO<sub>4</sub> can enhance the reactivity of lithium slag, and further increase the amount of hydration products. Moreover, the compressive strength of clinker-free cement paste with lithium slag and quicklime is improved (25.6 MPa at 28 d). This paper not only verifies that lithium slag and quicklime can be used to prepare the clinker-free cement, but also provides a theoretical basis for the addition of Na<sub>2</sub>SO<sub>4</sub> to enhance the reactivity of lithium slag.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 6","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-025-02720-y","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
In order to reduce the environmental harm caused by the production of traditional cement, the feasibility of preparation for clinker-free cement based on lithium slag and quicklime was investigated in this paper. Meanwhile, the effect of Na2SO4 on the reactivity of lithium slag was studied. The hydration degree, hydration products and microstructure of clinker-free cement paste were analyzed by FTIR, XRD, TG-DTG, NMR, and SEM, respectively. The results indicate that lithium slag itself does not have the ability to hydrate. However, the clinker-free cement paste prepared with lithium slag can harden after adding quicklime, due to the formation of hydration products C–(A)–S–H gel and AFt. Adding Na2SO4 can enhance the reactivity of lithium slag, and further increase the amount of hydration products. Moreover, the compressive strength of clinker-free cement paste with lithium slag and quicklime is improved (25.6 MPa at 28 d). This paper not only verifies that lithium slag and quicklime can be used to prepare the clinker-free cement, but also provides a theoretical basis for the addition of Na2SO4 to enhance the reactivity of lithium slag.
期刊介绍:
Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.