Sustainable Enhancement of Recycled Aggregate Concrete Using Supplementary Cementitious Materials: Mechanical Performance and Environmental Assessment
補助セメント材料を用いた再生骨材コンクリートの持続可能な向上：力学性能と環境評価 (AI 翻訳)
Marwah Al tekreeti, Zeeshan Tariq
🤖 gxceed AI 要約
日本語
本研究は、再生骨材コンクリート（RAC）にシリカフューム、メタカオリン、高炉スラグを混入し、力学特性と環境影響を評価した。その結果、スラグ混入RACは圧縮強度が最も高く、普通コンクリートに近い性能を示した。また、混和材を用いたRACは体積炭素排出量が最大14.4%削減され、建設分野の脱炭素化に貢献する。
English
This study evaluates the mechanical and environmental performance of recycled aggregate concrete (RAC) with supplementary cementitious materials (SCMs). RAC with GGBS achieved compressive strength close to natural aggregate concrete, and SCM mixes reduced embodied carbon by up to 14.4%, supporting 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
日本の建設業界では、コンクリートのCO2排出削減が急務であり、再生骨材の利用は循環経済の観点からも重要。本研究の成果は、日本の建設会社やゼネコンが環境配慮型コンクリートを採用する際の技術的根拠となる。
In the global GX context
Globally, the construction sector faces pressure to reduce embodied carbon. This study provides empirical evidence on the use of SCMs in RAC to lower carbon footprint while maintaining strength, relevant for green building standards and low-carbon concrete initiatives.
👥 読者別の含意
🔬研究者:Provides comparative data on SCM types in RAC, useful for further optimization of mix designs.
🏢実務担当者:Offers actionable insights for concrete producers to adopt SCMs in recycled aggregate mixes for lower carbon footprint.
🏛政策担当者:Supports policies promoting recycled materials and supplementary cementitious materials in construction to meet climate targets.
📄 Abstract（原文）
The construction industry requires a substantial quantity of natural resources and has a considerable environmental impact. The utilization of recycled aggregate concrete (RAC) and supplementary cementitious materials (SCMs) has shown great promise in mitigating environmental issues like waste generation and greenhouse gas emissions. This study evaluates the mechanical properties and environmental effects of RAC incorporating silica fume (SF), metakaolin (MK), and ground granulated blast furnace slag (GGBS) into the mix. Five mixes were prepared for the study: natural aggregate concrete (NAC), RAC, and RAC with 15% cement replaced by SF, MK, and GGBS. The results showed that RAC has lower compressive strength compared to NAC due to increased porosity and a weaker interfacial transition zone between the particles. The addition of SCMs greatly improved the mechanical strength of RAC. RAC containing GGBS showed the best results among all RAC mixes. RAC containing GGBS showed a compressive strength of 50.03 MPa at 28 days and 54.34 MPa at 90 days, which was closer to that of NAC. The environmental analysis showed that RAC mixes containing SCMs have a lower percentage of embodied carbon compared to normal concrete mixes. RAC mixes containing SF showed the least percentage of embodied carbon. The percentage reduction in embodied carbon was up to 14.4% compared to normal concrete mixes.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://uwlpress.uwl.ac.uk/efs/article/id/329/download/pdf/first seen 2026-07-05 05:47:57 · last seen 2026-08-02 06:27:39
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