北東ナイジェリアの低炭素住宅向けに地元調達した壁材のライフサイクル評価と熱性能
LIFE-CYCLE ASSESSMENT AND THERMAL PERFORMANCE OF LOCALLY SOURCED WALLING MATERIALS FOR LOW-CARBON RESIDENTIAL BUILDINGS IN NORTH-EAST NIGERIA (原題)
ALI KOLO MUKTAR, MUHAMMAD TIJJANI, MOHAMMED KABIR, CHARLES ADAMU BALAMI
🤖 gxceed AI 要約
日本語
北東ナイジェリアで一般的な4種の壁材（サンドクレートブロック、CSEB、焼成レンガ、アドベ）を、埋め込み炭素・熱貫流率・室内温度・冷房エネルギー・単価の5基準で統合評価した。ISO 14040に基づく埋め込み炭素はアドベ10.7、焼成レンガ118.4 kg CO₂e/m²と大きく開き、窯焼成が主因だった。EnergyPlusシミュレーションではCSEBが冷房需要を12.2%削減。総合評価はアドベが最高だが圧縮強度基準を満たさず、CSEBを推奨とした。
English
This study evaluates four locally sourced walling materials in North-East Nigeria—sandcrete block, CSEB, burnt clay brick and adobe—across embodied carbon, thermal transmittance, indoor temperature, cooling demand and unit cost in one framework. Cradle-to-gate embodied carbon ranged from 10.7 kg CO2e/m2 (adobe) to 118.4 (burnt clay brick), driven by clamp-kiln firing, while CSEB cut annual cooling demand by 12.2% in EnergyPlus simulation. Adobe scored highest overall but failed the compressive strength standard, leaving CSEB as the recommended specification.
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GX文脈への直接の接続は薄いが、建材の埋め込み炭素と熱性能を同一フレームで評価する手法は、住宅・建設セクターのScope 3算定や省エネ基準の議論に示唆を与える。
In the global GX context
Adds empirical evidence from a low-income, hot-climate context to the global embodied-carbon and building-performance literature, where most datasets come from temperate, high-income countries; useful for CSRD/Scope 3 building-material accounting debates.
👥 読者別の含意
🔬研究者:建材選択における埋め込み炭素と動的热特性を統合評価するAHPフレームの実例として参考になる。
🏢実務担当者:暑熱地域の建設・調達において、炭素と冷房負荷を同時に下げる壁材選定の判断材料になる。
🏛政策担当者:建築基準と低炭素建材普及策を、熱性能・炭素・コストの複数基準で設計する際の参照事例となる。
📄 Abstract（原文）
Walling specification in North-East Nigeria proceeds largely on grounds of cost and familiarity rather than measured environmental or thermal evidence, and the embodied and operational burdens of the choice are conventionally assessed in separate literatures. This study evaluated four locally sourced walling materials, namely sandcrete block as the conventional control, compressed stabilised earth block (CSEB), burnt clay brick and adobe or laterite block, against five criteria within a single framework: cradle-to-gate embodied carbon, thermal transmittance, indoor operative temperature, annual cooling energy demand and unit cost. Thermophysical properties were measured on twelve specimens to ASTM C518, embodied carbon was computed to ISO 14040 on a functional unit of one square metre of finished wall using locally adjusted inventory coefficients, and four otherwise identical cases of a three-bedroom prototype were simulated in EnergyPlus over 8,760 hours under the Maiduguri weather file, with unit cost established from a structured vendor survey in Biu and Maiduguri. Criteria were min-max normalised and aggregated using analytic hierarchy process weights, with robustness tested across six weighting scenarios. Transmittance discriminated poorly, the four U-values spanning only thirteen per cent, whereas the dynamic characteristics separated the materials sharply: the hollow sandcrete section returned a time lag of 5.9 hours and a decrement factor of 0.592 against 8.9 hours and 0.331 for CSEB. Embodied carbon ranged from 10.7 kg CO₂e m⁻² for adobe to 118.4 for burnt clay brick, driven almost entirely by clamp-kiln firing. CSEB reduced annual cooling demand by 12.2 per cent and discomfort intensity by 23.1 per cent relative to the control. Adobe returned the highest composite index but failed the NIS 87:2007 compressive strength minimum and was therefore excluded, leaving CSEB as the recommended specification.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.70382/tijbees.v13i4.0113first seen 2026-11-08 04:57:21 · last seen 2026-11-14 05:03:51
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