独立フーチングの形状と結合材が内包炭素とコストに与える影響
The Effects of Geometry and Binder on Embodied Carbon and the Cost of Isolated Pad Footings (原題)
Arjun Singh, A. Jain, G. Sancheti
🤖 gxceed AI 要約
日本語
本論文は、インドの中低層建築で一般的な4種類の独立フーチング（フラット・傾斜・段状・台座）について、A1-A3の内包炭素と材料コストを定量化した。フライアッシュとGGBSを混和したM40配合を5種類設計し、形状と結合材組成がそれぞれ独立に炭素を削減することを示す。傾斜フーチングと50%混和材の組合せが最も低影響で、従来のOPCフラットフーチング比で内包炭素を約45%、コストを約35%削減した。炭素とコストは強く相関し、低炭素基礎設計が必ずしもコスト増を招かないことを確認した。
English
This paper quantifies cradle-to-gate (A1-A3) embodied carbon and material cost for four common isolated pad-footing geometries (flat, sloped, stepped, pedestal) in Indian low- and mid-rise construction. Using five M40 mixes with fly ash and GGBS, it shows geometry and binder composition independently cut embodied carbon. A sloped footing with 50% SCM mix achieved the lowest impact, reducing embodied carbon ~45% and cost ~35% versus conventional flat OPC footings, with strong carbon-cost correlation.
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
日本ではSSBJ・有報でのScope 3開示が進み、建設業でも資材由来の内包炭素（カテゴリ1・2）の把握が求められている。本論文は基礎構造という見落とされがちな部位で炭素とコストの両立可能性を示し、日本企業の低炭素調達・設計判断の参考になる。ただし係数はインド基準であり、日本での適用には国交省・JIS等の係数への置換が必要。
In the global GX context
Globally, embodied carbon in construction is increasingly covered under CSRD, ISSB and green building standards, yet foundations remain understudied relative to superstructures. This study provides empirical evidence from a rapidly developing economy that low-carbon foundation design can be cost-neutral or cost-saving, supporting transition finance and procurement decisions in emerging markets. It adds a non-OECD dataset to the predominantly European embodied-carbon literature.
👥 読者別の含意
🔬研究者:基礎構造の内包炭素とコストのトレードオフに関する非欧米圏の実証データを提供し、LCA研究の地理的偏りを補完する。
🏢実務担当者:低炭素混和材と形状最適化により、基礎工事で炭素とコストを同時に削減できる可能性を示す。
🏛政策担当者:建設分野の内包炭素規制やグリーン公共調達基準を設計する際、基礎部位の削減ポテンシャルを考慮すべき根拠となる。
📄 Abstract（原文）
The construction sector is among the largest contributors to global carbon emissions, with rapidly developing economies such as India playing a significant role. However, foundations have received far less attention than superstructures in embodied carbon research. This paper quantifies the cradle-to-gate (A1-A3) embodied carbon and material cost of the four most widely used isolated pad-footing geometries in Indian low- and mid-rise building construction, namely flat, sloped, stepped, and pedestal. The footings were designed in accordance with Indian standards across five M40 mixes incorporating fly ash and Ground Granulated Blast-Furnace Slag (GGBS), and their embodied carbon was assessed using coefficients representative of the Indian region. Footing geometry and binder composition independently reduce embodied carbon through lower concrete volume and lower carbon intensity, respectively. The sloped footing with a 50% supplementary cementitious mix achieved the lowest impact, reducing embodied carbon by about 45% and material cost by about 35% relative to a conventional flat Ordinary Portland Cement (OPC) footing. Cost and carbon were strongly correlated, confirming that low-carbon foundation design does not necessarily increase cost.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://www.etasr.com/index.php/ETASR/article/download/20630/7114first seen 2026-10-06 05:37:13
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