クローズド・ループ・リサイクル:デンマークは廃コンクリートからクリンカーを大規模に生産できるのか?
Arvind Chauhan1, Teklit Ambaye2, Wolfgang Kunther2
1Sustainability and LCA discipline, Cowi, Parallelvej 2, 2800, Kongens Lyngby, Denmark; Department of Environmental and Resource Engineering, Technical University of Denmark, 2800, Lyngby, Denmark.
Chemosphere
|February 14, 2026
まとめ
超精細コンクリート廃棄物粒子 (UFCWP) の閉環リサイクリングは,セメント産業の持続可能性を高めることができます. しかし,化学的制限により,UFCWPの代替はデンマークのセメント生産で11.76%に制限されています.
科学分野:
- マテリアルサイエンス 材料科学
- 化学工学は化学工学というものです.
- 環境科学 環境科学
背景:
- 循環経済 (CE) と閉ループリサイクルが,セメント産業の持続可能性の鍵です.
- 生粉の化学組成は,特にコンクリートのリサイクルのために,セメント製造を制限します.
- 超精細コンクリート廃棄物粒子 (UFCWP) は,クリンカー生粉を潜在的に置き換えることができます.
研究 の 目的:
- デンマークのセメントクリンカー生産において,従来の生粉をUFCWPで置き換えることの化学的限界を評価する.
- シメント産業のためのEOLコンクリートの閉ループリサイクルの可能性を評価する.
主な方法:
- 概念的なステキオメトリー質量バランスモデルと物質流動分析を組み合わせたものです.
- 分析はデンマークのクリンカー生産状況に焦点を当てた.
- 最大置換率と環境への影響を定量化しました.
主要な成果:
- UFCWPの最大11.76%は,デンマークのセメントクリンカー生産における従来の生粉を代替することができます.
- この置換により,地球温暖化の可能性が10%減少する可能性があります.
- デンマークにおける現在のEOL CEM Iコンクリート生産量 (約. 1.2 Mton) は不十分であり,この置換には3倍以上の量が必要である.
結論:
- 化学的制限は,セメント生産におけるUFCWPの置換の範囲を制限しています.
- デンマークでは,EOLコンクリートの需要と供給の相違が大きく,効率的なクローズド・ループのリサイクルに欠かせない.
- シメント産業におけるCEの潜在力を実現するためには,リサイクル技術とEOLコンクリートの管理におけるさらなる進歩が必要である.
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