浮体式洋上風力下部構造向け低炭素コンクリートの開発と検証
Development and Validation of Low-Carbon Concrete for Floating Offshore Wind Substructures (原題)
Pablo Tamayo, J. A. Sainz-Aja, C. Thomas, D. Ferreño, J. Moreu, A. Pombo, R. Guanche
🤖 gxceed AI 要約
日本語
浮体式洋上風力の下部構造に適した低炭素自己充填コンクリートの開発・最適化・パイロットスケール評価を行った研究。普通ポルトランドセメント（CEM I）と高炉スラグ系CEM III/Bを比較し、両者とも圧縮強度75〜85MPa、弾性率45〜52GPaを達成。CEM III/Bは塩化物浸透係数が大幅に低く、材料コスト10〜15%減、A1〜A3素材段階の炭素排出約50%減、強度当たり炭素効率は約2倍となった。
English
This study develops and validates low-carbon self-compacting concrete for floating offshore wind substructures, comparing Portland cement (CEM I) with slag-based CEM III/B. Both binders achieved 75–85 MPa compressive strength and 45–52 GPa modulus, but CEM III/B showed far lower chloride migration, 10–15% lower material cost, and ~50% lower A1–A3 embodied carbon, nearly doubling carbon efficiency per unit strength. Pilot-scale trials confirmed lab-to-plant consistency.
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
洋上風力の国内導入拡大とサプライチェーン脱炭素が政策課題となる中、素材段階の炭素削減とコスト低減を両立する実証データは、建設業のScope 3削減やグリーン調達基準の策定に資する。SSBJのScope 3開示や有報での気候関連情報開示を進める事業者にとって、低炭素資材の定量根拠として有用。
In the global GX context
As offshore wind scales globally, embodied-carbon reduction in foundations is increasingly scrutinized under CSRD/ISSB Scope 3 and green procurement rules. This paper provides rare pilot-scale evidence that slag-based binders can cut material-stage carbon ~50% without compromising fatigue or durability, supporting transition finance for low-carbon construction supply chains.
👥 読者別の含意
🔬研究者:低炭素コンクリートの疲労特性・耐久性・炭素効率を実証的に比較した貴重なデータを提供する。
🏢実務担当者:洋上風力基礎の調達・設計において、CEM III/B採用によるコスト・炭素削減の定量的根拠として活用できる。
🏛政策担当者:洋上風力の国内調達基準や公共調達における低炭素資材の要件設計に示唆を与える。
📄 Abstract（原文）
Abstract This study investigates the development, optimisation and preliminary scale-up assessment of low-carbon self-compacting concrete mixes tailored for floating offshore wind substructures, comparing traditional Portland cement (CEM I) with slag-based CEM III/B binder systems. A comprehensive experimental programme was conducted, encompassing multiple laboratory-scale mix designs, fatigue behaviour assessment using the Locati method, and pilot-scale production trials involving one 1.5 m 3 batch of each selected mix. Fresh properties confirmed self-compacting performance at laboratory scale. Mechanical performance at 28 days demonstrated high compressive strength (≈ 75–85 MPa) and elastic modulus (≈ 45–52 GPa) for both binder families, while durability indicators showed significantly lower chloride migration coefficients for CEM III/B concrete mixes (≈ 1.5–2.6 × 10⁻ 12 m 2 /s vs. ≈ 1 × 10⁻ 11 m 2 /s). Preliminary fatigue tests indicated comparable responses for both binder systems, with slag-based concrete mixes mobilising a slightly higher proportion of static strength. The pilot-scale trials showed generally consistent mechanical and durability-related properties between laboratory and plant production. Slag-based concrete mixes also exhibited substantial reductions in material cost (≈ 10–15%) and A1–A3 material-level embodied carbon (≈ 50%), with carbon efficiency nearly doubled when normalised by strength. Overall, the results demonstrate the strong potential of CEM III/B concrete as a technically competitive and lower-carbon alternative to CEM I for offshore structural applications.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1186/s40069-026-00971-9first seen 2026-10-21 04:39:40
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