Transforming cement chemistry for net-zero: role of metakaolin in low-carbon composites
ネットゼロを目指すセメント化学の変革：低炭素複合材料におけるメタカオリンの役割 (AI 翻訳)
Nejib Ghazouani, Khaled Mohamed Elhadi, Zeeshan Ahmadd
🤖 gxceed AI 要約
日本語
本レビューは、メタカオリン(MK)を補助セメント材料として用いることで、コンクリートの炭素フットプリントを低減する可能性を検討した。MKベースのジオポリマーは最大70MPaの圧縮強度と20%の強度向上を示し、エポキシ系よりも1.5倍高い接着強度、最大63%の耐衝撃性向上を達成。水和メカニズムと他のSCMとの相互作用を解明し、ネットゼロセメントの開発を支援する。
English
This review examines metakaolin (MK) as a supplementary cementitious material to reduce the carbon footprint of concrete. MK-based geopolymers achieve compressive strengths up to 70 MPa and 20% strength improvement, with bond strength 1.5 times higher than epoxy and impact resistance increase up to 63%. The paper discusses hydration mechanisms and interactions with other SCMs, supporting the development of net-zero cement alternatives.
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
日本では建設業の脱炭素化が急務であり、セメント産業はCO2排出の主要源です。本レビューはメタカオリンを用いた低炭素コンクリートの性能を示しており、日本の建設会社やゼネコンが持続可能な素材を採用する際の参考になります。特に、SSBJやTCFD開示で求められるサプライチェーン排出量削減に貢献できます。
In the global GX context
Globally, cement production accounts for ~8% of CO2 emissions. This review provides evidence that metakaolin can substantially improve the mechanical properties of low-carbon concretes, supporting the transition to net-zero construction materials. It is relevant for ISSB/TCFD-aligned disclosure of Scope 3 emissions from construction and for green building certifications.
👥 読者別の含意
🔬研究者:This review synthesizes data on metakaolin's effects on geopolymer concrete, offering a benchmark for future experimental studies on low-carbon cement alternatives.
🏢実務担当者:Construction firms can use the reported strength and durability improvements to evaluate metakaolin-based concretes for structural applications and green building projects.
📄 Abstract（原文）
The global demand for sustainable construction materials has accelerated interest in alternative binders to ordinary Portland cement due to the significant environmental and energy impacts of conventional cement production. Metakaolin (MK) and other supplementary cementitious materials (SCMs) have emerged as promising candidates for enhancing the mechanical performance, durability, and environmental sustainability of geopolymer and alkali-activated concretes. This review comprehensively examines the influence of MK on alkali-activated and conventional concrete systems, focusing on fresh and hardened properties, curing conditions, hydration mechanisms, and interactions with SCMs such as fly ash, ground granulated blast furnace slag, silica fume, rice husk ash, and calcium hydroxide. The synergistic effects of MK with these SCMs show notable improvements, including compressive strengths up to 70 MPa and strength increases of about 20% compared to conventional mixes. In repair applications, MK-based geopolymers demonstrate bond strength up to 1.5 times higher than epoxy systems, while impact resistance improves significantly, with increases up to 63% and impact values reaching 658/712 under drop-weight testing. These materials also exhibit enhanced structural compatibility and durability. Advanced characterisation methods, including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and nuclear magnetic resonance, are discussed to elucidate the structural evolution and geopolymerisation processes influenced by MK and MgO additions.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1680/jensu.26.00040first seen 2026-07-03 05:01:28
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