Insight into Designing Low-Carbon Limestone-Metakaolin Cements with >65% Clinker Substitution Using Chemical Indicators
化学指標を用いたクリンカ置換率65%超の低炭素石灰石-メタカオリンセメント設計に関する洞察 (AI 翻訳)
Amani Alsheikh, Yassine El Mendili, Othman Omikrine Metalssi, Céline Florence, Othmane Bouchenafa, Fouad Boukhelf
🤖 gxceed AI 要約
日本語
本研究は、メタカオリンと石灰石を用いてクリンカを65%以上置換した低炭素セメントを開発。35%クリンカ、32%メタカオリン、33%石灰石の三元配合が28日強度59MPaを達成。化学指標（CSQ、PZh、HDh）により反応性と機械的性能のバランスを最適化した。
English
This study develops low-carbon cement using metakaolin and limestone to replace over 65% of clinker. A ternary mixture with 35% clinker, 32% metakaolin, and 33% limestone achieved 59 MPa compressive strength at 28 days. Chemical indicators (CSQ, PZh, HDh) effectively guided the formulation design for balanced reactivity and mechanical performance.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本のセメント業界はCO2排出削減が急務であり、本手法はクリンカ置換率65%超を達成する実用的な設計指針を提供する。サプライチェーン全体での脱炭素化に貢献しうる。
In the global GX context
Global cement production emits ~8% of anthropogenic CO2. This study demonstrates a robust chemical-indicator framework for designing low-carbon binders with >65% clinker substitution, using widely available metakaolin and limestone, offering a scalable path for the construction sector's decarbonization.
👥 読者別の含意
🔬研究者:Provides a chemical-indicator framework (CSQ, PZh, HDh) for designing low-carbon cements with high clinker substitution; useful for materials scientists developing sustainable binders.
🏢実務担当者:Offers a concrete formulation (35% clinker, 32% MK, 33% LS) achieving 59 MPa strength, directly applicable for cement manufacturers seeking low-carbon products.
🏛政策担当者:Supports policy for low-carbon construction materials by demonstrating a viable alternative to high-clinker cement, which can be considered in green procurement standards.
📄 Abstract（原文）
Reducing clinker content in cement is a key pathway toward decarbonizing the construction industry. This study proposes a sustainable approach for developing low-carbon cement by combining metakaolin (MK) and limestone (LS) to achieve high clinker substitution levels exceeding 65%. Formulations were chosen based on three chemical indicators: The Calcium–Silica Quotient (CSQ) corresponding to the calcium-to-silica ratio, Pozzolanic Reactivity Index (PZh), and Hydraulic Reactivity Index (HDh) to ensure balanced hydration reactivity and mechanical performance. Experimental results demonstrated that the ternary formulation containing 35% clinker, 32% MK, and 33% LS achieved the most favorable performance, with a compressive strength of 59 MPa at 28 days. Thermogravimetric, XRD, and FTIR analyses showed that excessive MK leads to premature portlandite depletion and limits the progressive development of poorly crystalline hydration products, whereas the balanced 35C–33LS–32MK formulation sustains pozzolanic reactivity through gradual CH consumption. The results demonstrate that the application of chemical indicators offers a robust framework for designing low-carbon binders capable of achieving significant clinker reductions while maintaining high mechanical performance, thus providing a scientifically grounded route for sustainable cement development using widely available raw materials.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.rineng.2026.111891first seen 2026-07-13 05:49:26
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