プロセスとハイブリッドライフサイクルの評価を通じて,建設廃棄物の複数の資源リサイクルルートでの炭素排出のギャップを特定する
Rui Chen1, Haiyuan Wu1, Junjie Li1
1Engineering Research Center of Clean and Low-carbon Technology for Intelligent Transportation, Ministry of Education, School of Environment, Beijing Jiaotong University, Beijing 100044, China.
Waste management (New York, N.Y.)
|September 3, 2025
まとめ
建設廃棄物の資源リサイクルは 炭素削減の大きな可能性を秘めています リサイクルされたアグリゲート,セメント安定化アグリゲート,リサイクルされたコンクリートレンガは,最も低炭素リサイクル方法であることを示しています.
科学分野:
- 環境科学
- 材料科学
- 持続可能な工学
背景:
- 建築廃棄物のリサイクルは環境への影響と 炭素排出量の削減に不可欠です
- 既存の研究は,さまざまなリサイクルプロセスの炭素削減の可能性を包括的に比較していない.
- 持続可能な建設の実践を導くには 炭素の正確な計算が必要です
研究 の 目的:
- 様々な建築廃棄物のリサイクルプロセスの炭素削減の可能性を総合的に比較する.
- 建築廃棄物のリサイクルにおける炭素会計のためのプロセスライフサイクル評価 (LCA) とハイブリッドLCAモデルの正確性と適用性を評価する.
- 最適なリサイクル経路と炭素会計方法の選択のためのデータ主導の洞察を提供すること.
主な方法:
- 炭素排出量を計算するために,プロセスライフサイクル評価 (LCA) とハイブリッドLCAモデルを使用した.
- 炭素排出量は,原材料のリサイクル (リサイクルされた堆積物),二次資源のリサイクル (セメントで安定したリサイクルされた堆積物,砕石) およびリサイクルされたコンクリートの固体レンガによるものです.
- モデルの精度とデータの信頼性を検証するために,感度と不確実性分析を行いました.
主要な成果:
- リサイクルアグレガット (2169 kg CO2eq/t),セメント安定化リサイクルアグレガット粉砕石 (37.019 kg CO2eq/t),リサイクルコンクリート固体レンガ (77.144 kg CO2eq/t) を最も低い炭素リサイクル経路として特定しました.
- プロセスのLCAモデルの結果は,ハイブリッドのLCAモデルより著しく低い (0.07-0.15%) で,計算範囲の違いを強調した.
- 感度と不確実性の分析は,両方のLCAモデルのデータの妥当性と正確性を確認しました.
結論:
- この研究では,異なる建築廃棄物リサイクル方法の炭素排出量を明確に比較し,最も効果的な低炭素オプションを特定しています.
- 建築廃棄物管理のためのLCAモデルを選択し改善する指針を提供し,企業のための炭素削減戦略を参考にします.
- この研究は,炭素の計算方法に関する科学的データと洞察を提供することで,建設廃棄物の低炭素リサイクルを支援します.
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