Sustainability evaluation of concrete and mortar with plastic aggregates and supplementary cementitious materials: An integrated LCA–LCCA framework
プラスチック骨材と補足セメント材料を用いたコンクリートとモルタルの持続可能性評価：統合LCA-LCCAフレームワーク (AI 翻訳)
D. Sau, T. Hazra, Amit Shiuly, Sudipta De
🤖 gxceed AI 要約
日本語
本研究は、廃プラスチック骨材（RPWA）と廃プラスチック骨材を天然骨材の一部代替として用いたコンクリートの環境・経済性能を、LCA（質量配分の有無）とLCCAを用いて評価した。結果、質量配分は環境影響を過大評価する可能性があり、アルカリ活性化コンクリート（AAC）が最も低い地球温暖化ポテンシャルとコスト削減を示した。感度分析では、輸送距離、セメント削減、骨材選定がCO2排出削減の鍵であることが示された。
English
This study evaluates the environmental and economic performance of recycled plastic waste aggregate (RPWA) as partial replacement for natural aggregates in concrete using LCA (with and without mass allocation) and LCCA. Results show that mass allocation can overestimate environmental burden; alkali-activated concrete (AAC) with bauxite and GGBS has the lowest global warming potential and cost savings of US$29.52–29.59/m3. Sensitivity analysis identifies transport distance, cement reduction, and aggregate selection as key drivers for CO2 reduction.
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
日本はコンクリート構造物が多く、廃プラスチック問題と低炭素コンクリートへの関心が高い。本フレームワークは日本の建設産業における材料選定や環境評価に応用可能であり、特にLCAにおける質量配分の影響を考慮する点は実務上有用である。
In the global GX context
Concrete production is a major global CO2 source; this integrated LCA-LCCA framework provides a systematic method to evaluate trade-offs between environmental impact and cost when using plastic waste and alternative binders. It offers practical insights for sustainable construction and circular economy initiatives worldwide.
👥 読者別の含意
🔬研究者:This paper provides a comprehensive framework combining LCA and LCCA for sustainable concrete, including sensitivity analysis on key parameters.
🏢実務担当者:Quantified cost savings and environmental benefits can guide material selection in construction projects.
🏛政策担当者:Insights on how mass allocation affects LCA outcomes and key drivers for CO2 reduction can inform green building regulations.
📄 Abstract（原文）
The use of plastic waste as a sustainable substitute for natural aggregates in construction is gaining attention, alongside efforts made to develop alternative cementitious materials to reduce the environmental and economic impacts of conventional cement. This study evaluates the environmental and economic performance of recycled plastic waste aggregate (RPWA) and waste plastic aggregate as partial replacements for natural aggregates in concrete using Life Cycle Assessment, with and without mass allocation, and Life Cycle Cost Analysis (LCCA). The environmental and economic impacts were assessed for both conventional and alkali‐activated concrete (AAC) incorporating alternative cementitious materials. The results show that mass allocation significantly influences impact results and can overestimate the environmental burden of plastic aggregates. AAC mixes containing bauxite and GGBS exhibited the lowest global warming potential and human toxicity, as well as the lowest carbon emissions per unit compressive strength, while RPWA concrete with epoxy resin showed the highest emissions. LCCA indicated cost savings of US$ 29.52–29.59/m3 for alternative binders and US$ 10.82–24.56/m3 for plastic aggregate concrete. Sensitivity and uncertainty analyses identified transport distance, cement reduction, and aggregate selection as key drivers for minimizing CO2 emissions and improving sustainability in concrete production.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/ep.70359first seen 2026-06-29 06:57:51
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