持続可能建築用途に向けた低炭素パーライト–シリカフュームモルタルの開発と性能評価
Development and performance assessment of low-carbon perlite–silica fume mortar for sustainable buildings applications (原題)
Umar Ashraf, Omar Basha, Tariq Khattab, Azzam Abu-Rayash
🤖 gxceed AI 要約
日本語
膨張パーライトとシリカフュームを用いた軽量モルタルについて、パーライトの含水状態・粒径配合・養生条件が物性に与える影響を実験的に検討した研究。粗い粒度は吸水率と空隙率を増加させ、炉乾燥養生は密度と熱伝導率を低下させた。熱伝導率は0.46程度から0.21程度まで低減し、2.0/4.0mm配合で圧縮強度17.4MPa・密度1116kg/m3を達成した。断熱性と強度を両立する建築外壁材の設計指針を示す。
English
This study experimentally assesses silica-fume-modified expanded-perlite mortars, varying perlite moisture condition, binary aggregate gradation, and curing regime. Oven curing lowered density and thermal conductivity (down to ~0.21 W/mK), while coarser gradations raised absorption and porosity. The 2.0/4.0 mm dry-perlite oven-cured mix reached 17.4 MPa at 1116 kg/m3, indicating a viable lightweight insulating building-envelope material.
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
建材由来のCO2削減はScope 3カテゴリ1・3の主要因であり、断熱性能の向上は建築物の省エネ性能表示やZEB対応にも直結する。ただし本論文は材料物性の評価に留まり、炭素削減量やLCA、制度対応への言及はないため、日本の開示実務への直接的示唆は限定的。
In the global GX context
Embodied-carbon reduction in cementitious materials feeds directly into Scope 3 Category 1 accounting and building-level decarbonization pathways under frameworks like CRREM and EU EPBD. The paper offers material-level performance data but no LCA or carbon quantification, so its link to ISSB/CSRD disclosure is indirect.
👥 読者別の含意
🔬研究者:軽量骨材の含水状態・粒度・養生が断熱性と強度のトレードオフに与える影響を定量化した実験データとして参照できる。
🏢実務担当者:建材調達や建物の省エネ設計において、断熱性能と構造強度を両立する配合の選択肢として活用しうる。
📄 Abstract（原文）
The development of lightweight cementitious composites incorporating supplementary cementitious materials is essential for reducing the environmental impact of construction while improving thermal efficiency in urban building envelopes. This study investigates silica-fume-modified expanded-perlite (EP) mortars as lightweight cementitious composites by examining the combined effects of perlite moisture condition, binary aggregate particle-size gradation, and curing regime. Dry perlite (DP) and saturated surface-dry (SSD) perlite were used in six binary combinations of 0.8, 2.0, 3.15, and 4.0 mm particles and subjected either to 28 days of air curing or to 7 days at 100 °C followed by 21 days of air curing. Density, compressive strength, displacement, water absorption, porosity, and thermal conductivity were measured, while elastic modulus was calculated using an empirical lightweight-concrete relationship. XRD, TGA, and SEM were used to interpret hydration-related phase and microstructural changes. Coarser expanded-perlite aggregate gradations increased water absorption and porosity, whereas oven curing generally reduced density and thermal conductivity. Thermal conductivity decreased from 0.323–0.432 to 0.206–0.241 W/m K in SSD mixtures and from 0.351–0.460 to 0.213–0.290 W/m K in DP mixtures. Under the dry perlite oven-curing condition, the 2.0/4.0 mm gradation achieved the highest compressive strength of 17.4 MPa at 1116 kg/m 3 . These findings demonstrate that optimized expanded-perlite grading, silica-fume refinement, moisture conditioning, and controlled curing can produce lightweight cementitious mortars with balanced compressive strength, density, and thermal-insulation performance for sustainable building-envelope and easy-wall applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s43621-026-05023-6first seen 2026-10-28 04:53:39 · last seen 2026-11-06 04:50:41
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