CO2 mineralization fixation and performance enhancement of silicate cement paste
ケイ酸塩セメントペーストのCO2鉱物固定化と性能向上 (AI 翻訳)
Dongfang Li, Zengyang Huang, Lichun Zhou, Ruijie Jian, Zhaobin Gong, Wentao Fu, Haibin Lin, Fangzan Luo, Xuyang Chen, Wenjun Zhou, Limin Ye, Zhang Zheng
🤖 gxceed AI 要約
日本語
この研究は、ケイ酸塩セメントの炭酸塩化によるCO2固定化と強度向上を検討。気体CO2と固体CO2（ドライアイス）を用いた混練方法を設計し、水セメント比0.2で最終炭酸固定率8.1wt%を達成。従来の混練法に比べ、CO2吸収効率が大幅に向上した。グリーンな建築材料の実現に貢献する技術。
English
This study explores CO2 mineralization in silicate cement paste to enhance carbon sequestration and mechanical performance. A novel mixing method using gaseous and solid CO2 achieved a final carbon sequestration rate of 8.1 wt% at a water-cement ratio of 0.2, significantly outperforming conventional mixing (0.68 wt%). The approach provides a practical path for low-carbon construction materials.
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
日本はセメント産業のCO2排出削減が急務であり、本技術は日本国内のセメント製造プロセスに応用可能。CCUS技術の一つとして、グリーンイノベーション基金などの政策とも親和性が高い。
In the global GX context
The cement industry accounts for ~8% of global CO2 emissions, making this mineralization technique highly relevant for worldwide decarbonization. It aligns with global CCUS initiatives and low-carbon construction material standards.
👥 読者別の含意
🔬研究者:Provides experimental data on a novel CO2 mineralization mixing method that significantly improves carbon sequestration in cement paste.
🏢実務担当者:Offers a practical technical pathway for cement manufacturers to reduce carbon footprint while maintaining product performance.
🏛政策担当者:Supports policy efforts to promote CCUS in construction materials and could inform carbon credit schemes for cement decarbonization.
📄 Abstract（原文）
Silicate cement has a huge market demand because it is widely used in construction, transportation and other infrastructures. It has become a current research hotspot how to ensure its performance while meeting the requirements of environmental protection. To this end, the study used PO42.5 silicate cement as the base material, and adopted the solid-carbon enhanced mixing method by introducing gaseous CO2 and solid CO2 (dry ice) as the mineralization medium. The effects of CO2 mineralization on the hydration behavior and mechanical properties of cement paste were systematically evaluated. The experimental results showed that the mineralization rate and carbon sequestration capacity of the ready-mixed concrete samples were optimal when the water-cement ratio was 0.2, and the final carbon sequestration rate was 8.1 wt%. Under 10% silica doping, the optimal water-solid ratio was 0.22, the reaction rate constant was 0.163 min−1, and the delay time was shortened to 1.1 min. In addition, the ready-mixed concrete samples showed limited CO2 uptake when conventional mixing methods were used. The overall carbon sequestration reaction rate was low, and the final carbon sequestration rate was 0.68 wt% of the cement mass. In contrast, the CO2 uptake capacity was significantly enhanced when using the sequestration-enhanced mixing method, and the final carbon sequestration rate reached 3.18 wt%. In conclusion, the carbon sequestration mixing method designed by the study can significantly improve the CO2 absorption efficiency and mineralization rate of cement paste. Moreover, it can also provide a practical technical path to realize the development of green and low-carbon building materials.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1088/2631-8695/ae3453first seen 2026-06-29 06:59:19
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