再生廃棄物から製造する軽量低炭素エコレンガの機械的・機能的性能
Mechanical and functional performance of lightweight low-carbon eco-bricks manufactured from recycled waste materials (原題)
Shengnan Ma, C. Y. Kwok
🤖 gxceed AI 要約
日本語
浚渫海成堆積物と廃タイヤゴム、石灰活性化GGBSバインダーを用いた骨材フリーのエコレンガを開発。ゴム粒子径が力学・機能特性を支配し、0.1mm・10%配合で圧縮強度19.5MPa、重量16%減、熱伝導率0.73W/mKを達成。焼成不要とGGBSにより実質炭素排出を74〜80%削減し、重金属も安全に固定化できると示した。
English
A novel aggregate-free eco-brick made from dredged marine deposits, recycled tire rubber, and a cement-free lime-activated GGBS binder was tested across 13 formulations. Rubber particle size governs performance: 0.1 mm at 10% content yields 19.5 MPa compressive strength, 16% weight reduction, and 0.73 W/mK thermal conductivity. The GGBS route and firing-free process cut embodied carbon by an estimated 74–80% with safe heavy-metal immobilization.
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
建設分野のScope 3排出削減や低炭素建材の調達・グリーン調達基準を検討する日本企業にとって、廃棄物アップサイクルによる炭素削減ポテンシャルの定量的な参考事例となる。SSBJ開示における建材由来排出の評価にも示唆を与える。
In the global GX context
Adds empirical evidence on embodied-carbon reduction in construction materials, relevant to Scope 3 accounting and green procurement under CSRD/ISSB building-sector disclosures. Demonstrates waste upcycling as a measurable decarbonization lever for the built environment.
👥 読者別の含意
🔬研究者:廃棄物複合材料の界面設計と炭素削減ポテンシャルの定量評価手法の参考になる。
🏢実務担当者:低炭素建材の調達や建設Scope 3削減策の選択肢として廃棄物アップサイクル材を検討できる。
🏛政策担当者:建設廃棄物の再資源化促進と低炭素建材基準の設計に資するエビデンスを提供する。
📄 Abstract（原文）
Driven by circular economy goals, upcycling dredged marine deposits and waste tire rubber remains a critical challenge. Conventional eco-bricks rely on natural or recycled aggregates to form a rigid skeleton, introducing heterogeneous interfaces and micro-mechanical defects while increasing energy consumption. This study introduces a novel matrix-dominated, aggregate-free eco-brick fabricated from fine-grained dredged marine deposits, recycled granular tire rubber, and a cement-free, lime-activated ground granulated blast furnace slag (GGBS) binder. A comprehensive experimental program evaluated thirteen formulations, varying rubber content from 0% to 20% and particle size from 0.1 to 1.0 mm, to determine how rubber inclusion characteristics affect the composite’s macroscopic performance and microstructural evolution. Results show that rubber particle size fundamentally governs mechanical and functional behavior. While rubber incorporation reduces structural stiffness and increases porosity, optimizing the inclusion size (e.g., 0.1 mm at 10% content) effectively controls interfacial defect formation. This selected formulation ensures a sufficient compressive capacity of 19.5 MPa, alongside a 16% weight reduction and a superior thermal conductivity of 0.73 W/mK. Microstructural analyses reveal that fine rubber grains enhance spatial entrapment and uniform dispersion. This size-dependent spatial restriction limits the widening of the interfacial transition zone (ITZ), thereby mitigating the impact of localized modulus mismatches. Furthermore, utilizing the GGBS binder and eliminating high-temperature firing yields an estimated 74–80% reduction in embodied carbon emissions while ensuring safe heavy metal immobilization. This research establishes a fundamental paradigm for matrix-dominated eco-bricks, demonstrating that tailoring the physical size of waste inclusions and their interfacial compatibility can convert problematic wastes into low-carbon, high-performance building materials.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.conbuildmat.2026.148796first seen 2026-11-10 04:56:58 · last seen 2026-11-14 05:02:05
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