Using Supplementary Cementitious Materials for Sustainable Concrete
持続可能なコンクリートのための補助セメント材料の利用 (AI 翻訳)
Gunturu Sai Pragna, L. Prasanna, Nayab Mahaboob Subhani
🤖 gxceed AI 要約
日本語
本論文は、コンクリート製造におけるセメントの一部をシリカフューム、メタカオリン、フライアッシュなどの補助セメント材料（SCM）で置き換えることによる環境負荷低減と性能向上を検討した。最適化された3成分SCM配合により、圧縮強度が約16%向上し、塩化物イオン浸透性や硫酸塩膨張が最大40%低減することを示した。低炭素で耐久性に優れた次世代コンクリートの実現可能性を提示している。
English
This paper investigates the use of supplementary cementitious materials (SCMs) such as silica fume, metakaolin, and fly ash as partial replacements for cement in concrete to reduce environmental impact and improve performance. The optimized ternary SCM blend achieved about 16% higher 28-day compressive strength and up to 40% reduction in chloride permeability and sulfate expansion compared to the control. The study demonstrates a pathway to low-carbon, durable concrete for next-generation construction.
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、国土交通省が低炭素コンクリートの普及を推進しており、本研究成果は国内の建設業界におけるCO2削減目標達成に貢献する可能性がある。また、SCMの調達には国内資源の活用も検討すべき課題である。
In the global GX context
Globally, concrete production accounts for about 8% of CO2 emissions, and SCMs offer a practical decarbonization pathway. This paper provides a specific mix design that could be adopted in building codes and green construction standards worldwide.
👥 読者別の含意
🔬研究者:Provides a benchmark mix design for ternary SCM concrete, useful for further optimization in materials science.
🏢実務担当者:Concrete producers can adopt the proposed mix to meet sustainability requirements while maintaining or improving performance.
🏛政策担当者:Highlights the potential of SCMs in construction sector decarbonization, supporting regulatory push for low-carbon building materials.
📄 Abstract（原文）
The need for infrastructure expansion and the need to preserve the environment, driven by the use of concrete as a building material, are growing daily. Concrete is the second-most-consumed material after water. It is necessary to use alternative, sustainable materials, particularly recycled ones. The construction industry must urgently utilise SCMs (Supplementary Cementitious Materials) or industrial waste as alternatives to cement in concrete manufacturing, as this exacerbates environmental problems and increases cement costs. The development of sustainable, high-performance concrete involves the use of silica fume (SF), metakaolin (MK), and fly ash (FA). The mixture with SF (5–10%), MK (5–15%), and FA (10–30%) maintains workability through optimised water-to-binder ratios and admixtures. Durability assessments, including chloride penetration, sulfate resistance, and water absorption, as well as compressive, flexural, and split tensile strengths at multiple curing ages, are evaluated in this analysis. This research demonstrates how to produce low-carbon, durable, and sustainable concrete suitable for next-generation construction applications. Silica fume (5–10%), metakaolin (5–15%), and fly ash (10–30%) are integrated as partial replacements for cement in a single optimised mix design for a ternary SCM concrete system. The complementary reactivity and particle-packing characteristics of the three SCMs are used simultaneously in this proposed mix to improve the targets' strength, durability, and sustainability. The chloride penetration, sulfate resistance and water absorption for compressive, flexural and split tensile strengths were evaluated at multiple curing ages. The compressive strength and up to 40% reduction in chloride permeability, sulfate-induced expansion compared with the control mix, and the optimised ternary blend achieved about 16% higher 28-day strength, demonstrating low-carbon, durable, and sustainable concrete.
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