低炭素建設材料に向けた鉄鋼スラグの体積安定化：メカニズム、処理技術、エンジニアリング応用経路
Volume Stabilization of Steel Slag for Low-Carbon Construction Materials: Mechanisms, Treatment Technologies, and Engineering Application Pathways (原題)
Jiarui Gu, Zinuo Tian, Yujie Shao, Xiaoming Liu, Zengqi Zhang, Yinming Sun
🤖 gxceed AI 要約
日本語
鉄鋼スラグ中の遊離CaO・MgOによる膨張が利用拡大の障壁であることを整理し、表面改質・高温改質・酸処理・炭酸化の4技術を機構と実用性の観点で比較したレビュー。炭酸化は膨張相の低減とCO2鉱物固定を同時に実現しうるが、効率はスラグ性状や反応条件に強く依存する。複合技術と標準化された評価指標の整備が今後の鍵と結論づける。
English
This review examines how free CaO/MgO cause expansion in steel slag and compares four stabilization routes: surface modification, high-temperature modification, acid treatment, and carbonation. Carbonation is highlighted for simultaneously reducing expansive phases and mineralizing CO2, though efficiency depends on slag properties and reaction depth. The authors call for synergistic composite technologies and standardized multi-indicator evaluation frameworks.
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
日本は鉄鋼業の脱炭素と建設資材の資源循環が政策課題であり、スラグ炭酸化はCO2固定と廃棄物有効利用を両立する選択肢として、GX推進やカーボンニュートラル素材調達に関心を持つ企業・自治体に示唆を与える。
In the global GX context
Globally, steel slag carbonation sits at the intersection of industrial decarbonization, CCUS, and circular-economy construction materials. It speaks to transition pathways for hard-to-abate heavy industry, though it does not directly engage TCFD/ISSB disclosure frameworks.
👥 読者別の含意
🔬研究者:鉄鋼スラグ安定化技術の比較と炭酸化の課題を整理した基礎資料として有用。
🏢実務担当者:建設資材・鉄鋼メーカーがスラグ利用拡大とCO2固定を検討する際の技術選定に参考となる。
🏛政策担当者:スラグ体積安定性の統一基準や炭酸化技術の実証支援の必要性を示唆する。
📄 Abstract（原文）
Steel slag (SS), a major industrial solid waste generated during steelmaking, has considerable cementitious potential and high hardness for use in low-carbon construction materials. However, its widespread utilization is limited by poor volume stability arising from the delayed hydration and expansion of free CaO (f-CaO) and free MgO (f-MgO). This review systematically examines the formation mechanisms of these expansive phases and evaluates four stabilization technologies, including surface modification, high-temperature modification, acid treatment, and carbonation, with respect to their reaction mechanisms, technical advantages, limitations, and engineering applicability. The performance of stabilized SS in cementitious matrices and as construction aggregates is also assessed, together with the corresponding application scenarios. Carbonation is a promising route because it can simultaneously reduce reactive expansive phases and mineralize CO2. However, its stabilization efficiency depends strongly on slag characteristics, reaction conditions, and achievable carbonation depth. Major barriers to industrial application include reliance on single-modification strategies, limited engineering-scale validation, and the lack of unified standards for evaluating volume stability. Future research should focus on synergistic composite technologies, particularly flue-gas carbonation coupled with microbial mineralization, and standardized multi-indicator evaluation frameworks to promote the large-scale, high-value, and low-carbon utilization of SS.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/ma19194181first seen 2026-10-02 04:50:31
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