Valorisation of construction and demolition waste through recycling of fine aggregates towards reduced carbon dioxide footprint
建設解体廃棄物の微細骨材リサイクルによる二酸化炭素フットプリント削減 (AI 翻訳)
Subhadip Pramanik, Debabrata Mazumder
🤖 gxceed AI 要約
日本語
本研究は、実際の建設解体廃棄物（CDW）から得た再生微細骨材（RFA）をモルタルに利用し、CO2排出削減とコスト削減を両立する可能性を検証した。RFA置換率50%までは強度や耐久性への悪影響が小さく、コスト12.8%減、CO2排出量10.55kg/m3減を達成した。実廃棄物を用いた点が実務的価値を高めている。
English
This study uses real-world construction and demolition waste (CDW) to produce recycled fine aggregate (RFA) for mortar, demonstrating that up to 50% replacement minimally impacts strength and durability while reducing cost by 12.8% and CO2 footprint by 10.55 kg/m3. The use of heterogeneous field-collected waste enhances practical relevance for sustainable construction.
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
日本では建設廃棄物のリサイクルが進むが、再生骨材の品質ばらつきが課題。本研究成果は、実廃棄物を用いた配合最適化の枠組みを提供し、建設業の脱炭素と資源循環に寄与する。また、SSBJ開示におけるスコープ3排出量削減の具体的施策としても参考になる。
In the global GX context
Globally, construction accounts for a significant share of carbon emissions, and CDW recycling is a key circular economy strategy. This study provides a practical framework for optimizing RFA use in mortar, offering a replicable approach for reducing embodied carbon in construction materials, relevant to ISSB and CSRD disclosure requirements.
👥 読者別の含意
🔬研究者:Provides a novel methodology for using real-world CDW in RFA optimization, with quantitative CO2 and cost data.
🏢実務担当者:Offers actionable insights for construction firms to reduce material costs and carbon footprint through RFA use.
🏛政策担当者:Supports policies promoting CDW recycling and low-carbon construction materials.
📄 Abstract（原文）
A novel approach was adopted in this study – the use of real-world construction and demolition waste (CDW) as a source of recycled fine aggregate (RFA) for mortar production. Unlike in many previous studies, where laboratory waste was generated by casting and subsequently crushing concrete cubes, this research was based on heterogeneous, field-collected CDW, thereby reflecting the actual challenges of variability and contamination encountered in practice. The aim of this work was to optimise the percentage replacement of natural fine aggregate with RFA derived from real-world CDW rather than the more uniform laboratory-scale waste. Mortar mixes were prepared with 0–100% RFA replacement and their properties, including flow, bulk density, compressive strength, drying shrinkage, porosity, water absorption, sorptivity and resistance to acid and sulfate attack, were evaluated. The results showed that an increase in RFA content reduced workability, density and strength, and increased porosity, absorption and mass loss. However, for up to 50% replacement, the negative impact on strength and durability was minimal, while the cost was reduced by 12.8% and the carbon dioxide footprint was reduced by 10.55 kgCO2/m3. The findings of this work establish a novel and sustainable framework for optimising RFA use in mortar, based on real-world CDW streams.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1680/jmacr.26.00140first seen 2026-08-16 05:05:00
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