Enhancing the rheology, reaction kinetics and early-age strength of limestone calcined clay cement (LC3) with sodium silicate addition

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-07-16 DOI:10.1016/j.cemconres.2025.107997

Xiaodi Dai , Marcus Yio , Haoming Wu , Susan Bernal Lopez , Chris Cheeseman , Hong S. Wong

{"title":"Enhancing the rheology, reaction kinetics and early-age strength of limestone calcined clay cement (LC3) with sodium silicate addition","authors":"Xiaodi Dai , Marcus Yio , Haoming Wu , Susan Bernal Lopez , Chris Cheeseman , Hong S. Wong","doi":"10.1016/j.cemconres.2025.107997","DOIUrl":null,"url":null,"abstract":"<div><div>The effect of small-dose sodium silicate (SS) solutions with varying compositions on the rheology and early-age strength of limestone calcined clay cement (LC<sup>3</sup>) was evaluated. SS addition reduced colloidal interactions in LC<sup>3</sup>, leading to significant reductions in initial yield stress and viscosity, depending on composition. All SS-added systems met the initial setting time requirements of EN 197–1. A solution containing 1 % Na<sub>2</sub>O and a silicate modulus of 0.4 notably accelerated silicate and aluminate reactions in cement clinker, as well as synergistic reactions between calcined clay and limestone. This resulted in 1-day strength gains of 120 % and 13 % compared to LC<sup>3</sup> and CEM I, respectively. Microstructural analysis revealed a denser matrix and refined pore structure at 1 day, consistent with accelerated phase evolution. These results demonstrate that well-formulated SS solutions can significantly enhance both rheology and early-age performance of LC<sup>3</sup>, supporting their use as effective accelerators in sustainable cement systems.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"198 ","pages":"Article 107997"},"PeriodicalIF":10.9000,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884625002169","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

The effect of small-dose sodium silicate (SS) solutions with varying compositions on the rheology and early-age strength of limestone calcined clay cement (LC³) was evaluated. SS addition reduced colloidal interactions in LC³, leading to significant reductions in initial yield stress and viscosity, depending on composition. All SS-added systems met the initial setting time requirements of EN 197–1. A solution containing 1 % Na₂O and a silicate modulus of 0.4 notably accelerated silicate and aluminate reactions in cement clinker, as well as synergistic reactions between calcined clay and limestone. This resulted in 1-day strength gains of 120 % and 13 % compared to LC³ and CEM I, respectively. Microstructural analysis revealed a denser matrix and refined pore structure at 1 day, consistent with accelerated phase evolution. These results demonstrate that well-formulated SS solutions can significantly enhance both rheology and early-age performance of LC³, supporting their use as effective accelerators in sustainable cement systems.

查看原文本刊更多论文

水玻璃对石灰石煅烧粘土水泥（LC3）流变学、反应动力学和早期强度的影响

研究了不同组成的小剂量水玻璃溶液对石灰石煅烧粘土水泥（LC3）流变学和早期强度的影响。SS的加入减少了LC3中的胶体相互作用，导致初始屈服应力和粘度的显著降低，这取决于成分。所有添加ss的系统都符合EN 197-1的初始设置时间要求。当Na2O含量为1%，硅酸盐模量为0.4时，可显著加速水泥熟料中硅酸盐与铝酸盐的反应，以及煅烧粘土与石灰石之间的协同反应。与LC3和CEM I相比，这导致1天的强度分别增加了120%和13%。显微结构分析显示，第1天基质致密，孔隙结构精细，与相演化加速一致。这些结果表明，配方良好的SS溶液可以显著提高LC3的流变学和早期性能，支持它们在可持续水泥体系中作为有效的促进剂使用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.