Development of Lightweight Alkali-Activated Foams from Roof Tile and Marble Wastes: Pore Structure Evolution and Thermal Performance Optimization
屋根瓦廃棄物と大理石廃棄物からの軽量アルカリ活性発泡体の開発：細孔構造の進化と熱性能の最適化 (AI 翻訳)
K. Barış
🤖 gxceed AI 要約
日本語
本研究は、屋根瓦廃棄物と大理石廃棄物を用いて軽量アルカリ活性発泡体（AAF）を開発し、アルミニウム粉末による発泡挙動と断熱性能を系統的に評価した。最適組成では、単位重量0.56 g/cm3、熱伝導率0.15 W/m·K、圧縮強度3.12 MPaを達成し、セメント比で65.9%のEmbodied Carbon削減を示した。非耐力壁用途に有望な材料である。
English
This study develops lightweight alkali-activated foams (AAFs) using roof tile and marble wastes, evaluating aluminum powder foaming and thermal performance. The optimal mix achieved a unit weight of 0.56 g/cm3, thermal conductivity of 0.15 W/m·K, compressive strength of 3.12 MPa, and 65.9% lower embodied carbon than OPC binder. It is suitable for lightweight non-loadbearing wall applications.
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、廃棄物削減とCO2排出削減が課題であり、本材料は循環型社会と低炭素建築に貢献する。SSBJやグリーンビルディング認証（CASBEE等）の普及にも関連する。
In the global GX context
Globally, the paper contributes to the circular economy and embodied carbon reduction in construction. It aligns with ISSB and other disclosure frameworks that require reporting on waste and carbon performance, and supports sustainable building certifications like LEED.
👥 読者別の含意
🔬研究者:Materials scientists can use the optimization framework for waste-based geopolymer foams.
🏢実務担当者:Construction material manufacturers can adopt this formulation for low-embodied carbon products.
🏛政策担当者:Regulators could reference this for setting embodied carbon benchmarks in building codes.
📄 Abstract（原文）
The growing demand for sustainable construction materials has encouraged the development of waste-based alkali-activated foams (AAFs) with enhanced thermal performance. This study investigates the use of roof tile waste (RTW) and marble waste (MW) for producing lightweight AAFs and evaluates the influence of aluminum (Al) powder on material performance. The novelty of this study lies in combining binder optimization, systematic evaluation of Al-induced pore evolution, and quantitative sustainability assessment within a single experimental framework. RTW was partially replaced with MW to optimize the binder, followed by the incorporation of Al powder (0–0.20 wt%) as a foaming agent. In an alkaline medium, metallic Al released H2 gas, generating the porous structure of the AAFs. Physical, mechanical, thermal, microstructural, and material-based environmental properties were evaluated. In the binder optimization stage, 30% MW increased the compressive strength from 5.57 to 15.50 MPa. During AAF production, increasing Al content reduced dry-state thermal conductivity from 0.99 to 0.09 W/m·K, although excessive Al promoted pore coalescence and strength loss. The optimum 70RTW:30MW:0.15Al mixture exhibited a unit weight of 0.56 g/cm3, a dry-state thermal conductivity of 0.15 W/m·K, a compressive strength of 3.12 MPa, 79.9% waste incorporation, and 65.9% lower material-based embodied carbon than an ordinary Portland cement (OPC)-based reference binder, demonstrating its suitability for lightweight non-loadbearing wall applications.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/su18147458first seen 2026-07-25 05:41:01
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