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コンクリート廃棄物とCDW粉末は,モルタルにおけるポートランドセメントの代替品: 予備的な研究
Daniel Suarez-Riera1, Giuseppe Ferrara2, Luca Lavagna2
1Department of Structural, Building and Geotechnical Engineering, Politecnico di Torino, C.so Duca Degli Abruzzi 24, 10129 Torino, Italy.
Materials (Basel, Switzerland)
|February 13, 2026
まとめ
持続可能な建設材料は,通常のポートランドセメント (OPC) をリサイクルされた建設廃棄物 (CDW) とコンクリート (CON) 粉末に置き換えることで可能になります. この研究は,最大10%の置換が機械的な強さを維持し,環境に優しい結合物質を生成することを示しています.
科学分野:
- 材料科学 材料科学とは
- 土木工学 土木工学とは
- 持続可能な建設 持続可能な建設
背景:
- 普通のポートランドセメント (OPC) の生産は,世界のCO2排出の主要な源である.
- 建設業界は,環境への影響を減らすために持続可能な代替案を探しています.
- 建設・破壊廃棄物 (CDW) とコンクリート廃棄物 (CON) は,豊富な潜在的な資源です.
研究 の 目的:
- モルタルでOPCを部分的にCDWおよびCON粉末で置き換えることの実現可能性を調査する.
- 交換レベルが異なるモルターの機械性能を評価する.
- 持続可能なセメント粘着剤の作成の可能性を評価する.
主な方法:
- モルターの混合物は,5%,10%,15%,20%のOPCをCDWおよびCON粉末で代用して作られました.
- 機械性能はEN 196-1規格に従って評価されました.
- 材料の特徴付けは,X線 difraktion (XRD),X線 fluorescence (XRF),および熱重力測定分析を用いて行われました.
主要な成果:
- CDWとCONの粉末は主にクォーツとカルシットで構成されており,セメント系と互換性があります.
- 圧縮力は,10%までの置換レベルで維持またはわずかに改善されました.
- より高い置換率 (10%以上) は,希釈効果による適度な強度低下をもたらした.
結論:
- OPCをCDWおよびCON粉末で部分的に置き換えることは,持続可能な結合剤を開発するための実行可能な戦略です.
- これらの廃棄物の使用は,セメントの性質を変化させることができます,例えば,タイプIからタイプIIに相当します.
- このアプローチは,建設業界の環境足跡を減らすための有望な経路を提供します.
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