環境影響最小化のための規格外メタカオリンを含むセメントペーストの特性
Properties of Cement Paste Containing Sustainable Non-Conforming Metakaolin for Minimising Environmental Impact (原題)
Nurul Fazliyani Amran, S. Shakrani, Shamilah Anudai@Anuar
🤖 gxceed AI 要約
日本語
規格に適合しないメタカオリンを普通ポルトランドセメントの代替材として用い、セメントペーストの物性を実験的に評価した研究。10%置換で28日養生後に圧縮強度66.34MPaと最大となり、それ以上では低下した。規格外メタカオリンがCO2排出削減に資する代替材となり得ることを示す。
English
This study tests non-conforming metakaolin as a partial replacement for ordinary Portland cement in paste samples at 0-20% levels. Compressive strength and density peaked at 10% replacement (66.34 MPa at 28 days) before declining, while water absorption and pulse velocity rose with metakaolin content. Non-conforming metakaolin is shown to be a viable lower-carbon cement alternative.
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
建設業のScope 3排出量（購入した製品・サービス）や建材由来のembodied carbonはSSBJ・有報開示で重要性が増しており、低炭素セメント代替材の実証データはサプライチェーン排出削減の根拠として参考になる。ただし本論文は材料物性評価に留まり、CO2削減量の定量やLCAは示していない点に留意。
In the global GX context
Cement accounts for roughly 7-8% of global CO2 emissions, and embodied-carbon reduction in construction materials is increasingly scrutinized under CSRD/ESRS and Scope 3 disclosure regimes. This paper offers empirical evidence that non-conforming SCMs can substitute clinker, though it stops short of quantifying the carbon benefit needed for disclosure-grade claims.
👥 読者別の含意
🔬研究者:規格外SCMの物性データは、低炭素セメントの最適配合やLCA研究の基礎資料となる。
🏢実務担当者:建材調達における低炭素代替材の選択肢として、規格外メタカオリンの活用可能性を検討する材料になる。
🏛政策担当者:建設資材の資源循環・規格外品活用を促す調達基準や廃棄物規制の設計に示唆を与える。
📄 Abstract（原文）
In the building and construction industry, the use of ordinary Portland cement is often associated with a high carbon footprint, significantly contributing to climate change. Consequently, extensive research has explored the benefit of supplementary cementitious materials (SCMs) to reduce CO₂ emissions. One such material is metakaolin, which is widely available and has gained popularity. However, not all metakaolin properties meet the requirements set by standard specifications for SCMs. This study explores the use of non-conforming metakaolin as a partial replacement in cement paste to minimise environmental impact. Cement paste samples incorporating 0%, 5%, 10%, 15%, and 20% metakaolin were prepared using a 0.6 water-to-cement ratio and tested for properties such as compressive strength, water absorption, ultrasonic pulse velocity, and density at curing periods of 7, 14, and 28 days. Results showed that water absorption and pulse velocity increased with higher metakaolin content, while density and compressive strength improved up to a 10% replacement level before declining. The highest compressive strength of 66.34 MPa was achieved at a 10% replacement level after curing at 28 days. These findings suggest that non-conforming metakaolin has the potential to be used as a partial replacement for ordinary Portland cement, offering a viable alternative with a lower environmental impact and reduced carbon footprint.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://mjsat.com.my/index.php/mjsat/article/download/662/364first seen 2026-10-22 05:42:05 · last seen 2026-11-06 05:38:37
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