用氧化镁水泥稳定土质

IF 10.9 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Cement and Concrete Research Pub Date : 2024-09-05 DOI:10.1016/j.cemconres.2024.107655
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引用次数: 0

摘要

本研究首次比较了氧化镁水泥(MB)和硅酸盐水泥(PB)在稳定土砂浆方面的应用。虽然 MB 和 PB 土砂浆的强度相近,但 MB 水泥稳定土砂浆的早期龄期性能更优。热重分析、X 射线衍射、Si 和 P NMR 光谱显示,水泥在这两种体系中都发生了反应,并能建立相组合。稳定土浆含有较少的氢氧化物相,这表明两种情况下都发生了混合反应。
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Earth stabilisation with MgO-based cement

This study compares, for the first time, MgO-based (MB) cement and Portland-based (PB) cement for stabilizing earth mortars. While MB and PB earth mortars reach similar strength, MB cement stabilization demonstrates superior early-age performance. Thermogravimetric analysis, X-ray diffraction, 29Si and 31P NMR spectroscopies show that the cement reacts in both systems and allow to establish the phase assemblages. The stabilized earth pastes contain less hydroxide phases, indicating a pozzolanic reaction in both cases.

MB-stabilized clay mortars retain about 1/3 of the compressive strength of pure MB mortar, while with PB this proportion is only 1/5. This difference demonstrates that MB is more compatible with clay minerals and more suitable for stabilizing earth mortars. If MB cement could be produced with renewable energy from CO2-free sources (instead of from magnesite), stabilization of earth mortars with MB would be substantially more CO2 efficient than with PB.

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来源期刊
Cement and Concrete Research
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.
期刊最新文献
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