Converting Environmental Liabilities in the Construction Sector through Accelerated In Situ Carbonation with Supercritical CO₂ during Mixing: Global Systematic Review and Roadmap for Peru
建設部門における環境負債の転換：混合時の超臨界CO₂による加速原位置炭酸塩化に関する世界的体系レビューとペルー向けロードマップ (AI 翻訳)
GALVEZ PRP
🤖 gxceed AI 要約
日本語
本論文は、建設廃棄物や副産物を超臨界CO₂で処理するCCUS技術の体系レビュー。CO₂固定量15-50kg/m³、圧縮強度12-30%向上、炭素フットプリント15-45%削減を報告。ペルーでは年間60万トンのCO₂削減ポテンシャルと投資回収期間4年のロードマップを提案。
English
This systematic review covers CCUS technology of accelerated carbonation with supercritical CO₂ during concrete mixing. It reports CO₂ uptakes of 15-50 kg/m³, compressive strength increases of 12-30%, and carbon footprint reductions of 15-45%. For Peru, 600,000 tCO₂/year sequestration potential is identified with a 4-year ROI roadmap.
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
日本でも建設廃棄物や副産物の炭酸塩化技術は注目されており、本レビューの知見は日本のCCUS政策やカーボンフットプリント削減に応用可能。特に超臨界CO₂の効率性は日本のコンクリート産業に示唆を与える。
In the global GX context
This paper provides a comprehensive review and roadmap for CCUS in construction, applicable globally. The quantitative results on CO₂ uptake and strength improvement are valuable for carbon accounting and transition finance in the building sector.
👥 読者別の含意
🔬研究者:Researchers in CCUS and construction materials should note the quantitative performance metrics and comparison of supercritical vs gaseous CO₂ efficiency.
🏢実務担当者:Corporate sustainability teams in construction can use the roadmap and ROI data to evaluate CCUS investments and carbon credit opportunities.
🏛政策担当者:Policymakers can consider the regulatory framework (Law No. 30754) and job creation potential for integrating CCUS in national climate strategies.
📄 Abstract（原文）
<title>Abstract</title> <p>The construction industry generates between 5% and 8% of global CO₂ emissions and accumulates environmental liabilities in the form of construction and demolition waste (CDW), steel slag, fly ash, and cement kiln dust (CKD). Accelerated in situ carbonation with supercritical CO₂ (sc-CO₂) during the concrete mixing phase is a Carbon Capture, Utilization and Storage (CCUS) technology that transforms these liabilities into assets: it permanently mineralises CO₂ within the cementitious matrix as nano-CaCO₃, improves mechanical properties, and reduces the material's carbon footprint. This systematic review (PRISMA 2020, 68 primary studies; Scopus/WoS, 2010–2025) analyses experiences from the United States, France, Spain, Japan, China, Israel, Australia, the European Union, and South Korea, synthesising physicochemical mechanisms, operational parameters, and verified quantitative results. Key findings include: (i) CO₂ uptakes of 15–50 kg/m³ of concrete; (ii) compressive strength increases of 12–30% at early ages; (iii) water absorption reduction of recycled aggregates of up to 19.1%; (iv) sc-CO₂ modification efficiency up to 50 times higher than gaseous CO₂; and (v) carbon footprint reductions of 15–45% in industrial projects. For Peru, 1.5 Mt/year of carbonatable environmental liabilities (steel slag, fly ash, CKD) and more than 4,000 t/day of CDW in Lima are identified, with a sequestration potential of 600,000 t CO₂/year by 2030. A three-phase roadmap (pilot, scale-up, institutional) is proposed, involving investments of USD 1.2 M/plant, a 4-year ROI, and the creation of 2,000 direct jobs, aligned with Law No. 30754 on Climate Change and Peru's NDCs.</p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-9976401/v1first seen 2026-06-12 04:29:46
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