Low-carbon composite binders with high contents of Icelandic volcanic pozzolan and silicomanganese slag: Hydration kinetics, microstructure and strength development
高含有量のアイスランド産火山性ポゾランとシリコマンガンスラグを用いた低炭素複合バインダー：水和反応速度、ミクロ構造、強度発現 (AI 翻訳)
DS Hettiarachchi, S.M.Samindi M.K. Samarakoon, Kidane F. Gebremariam, Kjell Tore Fosså
🤖 gxceed AI 要約
日本語
本論文は、アイスランド産火山性ポゾラン（VPI）とシリコマンガンスラグ（SiMn）を高含有量でセメント代替した低炭素バインダーの長期水和特性と強度を検討。50～90%の置換率で、50%置換ではOPC同等強度を達成し、70%でも約80%の強度を維持。20%のSiMn混入がVPI系の長期性能に寄与することを明らかにした。
English
This paper investigates low-carbon binders with high replacements (50-90%) of Icelandic volcanic pozzolan and silicomanganese slag. At 50% replacement, 28-day strength matches ordinary Portland cement (75-85 MPa). Even at 70% replacement, strength reaches 78-84% of OPC. Adding 20% SiMn slag benefits long-term performance in VPI-rich systems despite low intrinsic reactivity.
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
日本はセメント産業からのCO2排出削減が急務であり、本研究成果は国内の自然ポゾランや産業副産物を活用した低炭素セメント開発に応用可能。特に、高置換率での強度保持メカニズムは、日本建築学会の規格改訂やグリーン購入法への反映が期待される。
In the global GX context
Globally, cement production accounts for ~8% of CO2 emissions. This study demonstrates that high-volume replacement with volcanic pozzolan and slag can produce competitive mechanical performance, supporting the ISSB's transition plan requirements and net-zero targets for hard-to-abate sectors.
👥 読者別の含意
🔬研究者:Provides long-term hydration and strength data for novel binder systems, useful for modeling and material design.
🏢実務担当者:Shows viable pathways for reducing clinker factor in cement production by up to 90% without catastrophic strength loss, applicable to product development.
🏛政策担当者:Supports industrial decarbonization policy by quantifying achievable emission reductions with alternative materials.
📄 Abstract（原文）
Reducing clinker factor is essential for lowering the environmental impact of cement-based materials, but maintaining mechanical performance at high replacement levels remains challenging. This study presents a systematic long-term comparison of low-carbon binary binders containing Icelandic volcanic pozzolan (VPI) and ternary binders containing VPI and silicomanganese slag (SiMn) at total cement replacement levels of 50–90%. Paste mixtures prepared at a water-to-binder ratio of 0.35 with 1% superplasticiser were investigated by compressive strength, isothermal calorimetry, and compositional phase and microstructural characterisations up to 365 days. Increasing cement replacement level delayed hydration and reduced early-age strength. At 28 days, binders with 50% total replacement achieved strengths comparable to or even exceeding control with ordinary Portland cement (OPC) reaching 75–85 MPa. Mixtures with 70% and 90% replacement attained 78–84% and 46–58% of the OPC strength, respectively, and continued to gain strength with curing. Binary binders showed greater portlandite consumption and more sustained formation of secondary reaction products than the corresponding ternary binders. Nevertheless, incorporation of 20% SiMn slag contributed to the long-term performance of VPI-rich systems despite its low intrinsic reactivity, and strengths remained, on average, within ±5% of the corresponding binary binders up to 70% replacement. The most favourable ternary response was obtained at 50% replacement. These results clarify stand alone and combined effect of VPI with SiMn slag in high-volume cement replacement binders and establish long-term relationships between hydration, microstructure, and strength that support the design of low-carbon binders with competitive mechanical performance.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.conbuildmat.2026.146759first seen 2026-05-24 04:51:59 · last seen 2026-05-27 04:48:39
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