Dedolomitization of dolostone filler: Modifying the course of Mg with SCM

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

Cement and Concrete Research Pub Date : 2025-03-31 DOI:10.1016/j.cemconres.2025.107883

Antonela Di Salvo Barsi, Mónica A. Trezza, Edgardo F. Irassar

引用次数: 0

Abstract

This study examines the stability of dolomitic filler (DF), both in isolation and in interaction with supplementary cementitious materials (SCMs), when immersed in water media at different pH at 40 °C. Additionally, the interaction of DF with Portland cement (PC) is analyzed. In the presence of SCMs or PC, results reveal that DF undergoes dedolomitization in alkaline environments, which confirms the absence of brucite in this process. As corroboration, the volumetric stability of mortar bars containing 20 wt% DF is demonstrated and the compressive strength remained after immersion in pore water at 40 °C for 5 years.

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白云石填料的脱白云化：用SCM改性镁的过程

本研究考察了白云岩填料（DF）在不同pH值和40°C的水介质中单独和与补充胶凝材料（SCMs）相互作用时的稳定性。此外，还分析了DF与硅酸盐水泥（PC）的相互作用。结果表明，在SCMs或PC存在的情况下，DF在碱性环境中发生脱白云石化，证实了水镁石不存在。作为佐证，含20 wt% DF的砂浆棒的体积稳定性得到证实，并且在孔隙水中40°C浸泡5年后抗压强度保持不变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.