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Dynamic carbon footprint trade-off between carbonation curing, mineral carbonation and natural carbon uptake in concrete blocks

コンクリートブロックにおける炭酸化養生、鉱物炭酸化、自然炭素吸収の動的カーボンフットプリントトレードオフ (AI 翻訳)

Maziar Javadpour, Sean McCoy, Sylvia Sleep

Environmental Research Letters📚 査読済 / ジャーナル2026-08-13#炭素会計Origin: Global経営インパクト: コスト削減対象セクター: construction
DOI: 10.1088/1748-9326/ae9968
原典: https://doi.org/10.1088/1748-9326/ae9968

🤖 gxceed AI 要約

日本語

コンクリートブロックの6シナリオを動的LCAで評価。自然炭酸化は焼成排出の11-37%を相殺し、炭酸化養生で25-55%に上昇。静的会計は過大評価。CCSで52-59%削減、炭酸化養生と鉱物炭酸化はCO2貯蔵依存を36-48%低減。

English

Dynamic LCA of six concrete block scenarios shows natural carbonation offsets 11-37% of calcination emissions (25-55% with carbonation curing), static accounting overestimates by 4-10%. CCS reduces emissions 52-59%; carbonation curing and mineral carbonation cut geological storage reliance by 36-48%.

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コンクリートの脱炭素が急務。カーボンフットプリントの動的評価は、LCAガイドラインやサプライチェーン排出量算定に示唆を与え、将来の規制対応に有用。

In the global GX context

Contributes to global LCA methodology for concrete decarbonization, relevant to ISSB/CSRD disclosure and transition finance for construction materials. Highlights dynamic vs static accounting gaps.

👥 読者別の含意

🔬研究者:Provides dynamic LCA framework for concrete carbonation, useful for refining carbon footprint methodologies.

🏢実務担当者:Informs concrete producers on emission reduction options and accurate carbon accounting for disclosure.

🏛政策担当者:Highlights need for dynamic accounting in building material regulations and carbon credit schemes.

📄 Abstract（原文）

Abstract Concrete accounts for approximately 7% of global anthropogenic CO 2 emissions, nearly two-thirds of which are hard-to-abate limestone calcination emissions that are partially offset through natural carbonation. This study presents a dynamic cradle-to-grave carbon footprint assessment of six scenarios for hollow concrete blocks, evaluating carbon capture, carbonation curing and mineral carbonation alongside their impact on natural CO 2 uptake. Natural carbonation offsets 11-37% of calcination emissions, rising to 25-55%, depending on modelling assumptions, with carbonation curing. Static accounting overestimates this benefit by 4-10%. Compared with conventional concrete, carbon capture, utilization, and storage scenarios can reduce emissions by 52-59%, with carbon capture responsible for 32-43% and the elimination of steam curing for 16-21%. Subsequent carbonation curing and mineral carbonation components themselves yield only marginal emission savings of 1-6%, but reduce the reliance on geological CO 2 storage by 36-48% relative to a capture-only scenario. These findings show that carbon capture and eliminating steam curing drive the emission reductions, while carbonation curing and mineral carbonation offer alternatives to CO 2 storage.

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