Limestone–Calcined Clay: An Alternative Binder for 3D Concrete Printing
石灰石–焼成粘土：3Dコンクリートプリンティングのための代替バインダー (AI 翻訳)
Nada Oulad Moussa, Mohamed El Haim, Loubaba Rida
🤖 gxceed AI 要約
日本語
本レビューは、3Dコンクリートプリンティング向けの低炭素バインダーとしての石灰石–焼成粘土セメント（LC3）の可能性を文献調査したものである。LC3は従来の普通ポルトランドセメントと比較してCO2排出量を30～50%削減でき、23層の印刷が可能な降伏応力とチキソトロピーを示す。繊維補強により圧縮および曲げ強度も向上し、気候ポジティブな建設手法として期待される。
English
This review examines limestone-calcined clay cement (LC3) as a low-carbon binder for 3D concrete printing. LC3 reduces CO2 emissions by 30-50% compared to ordinary Portland cement while achieving high yield stress, thixotropy, and printability up to 23 layers. Fiber reinforcement further improves mechanical properties, offering a sustainable alternative for additive construction.
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
日本ではセメント産業が二酸化炭素排出源の一つであり、LC3の導入は建設部門の脱炭素化に寄与する可能性がある。ただし、3Dプリンティング技術と組み合わせた具体的な国内適用事例は限られており、今後の研究開発が期待される。
In the global GX context
Globally, cement production accounts for 7-8% of CO2 emissions, and LC3 offers a scalable low-carbon alternative. This review consolidates rheological and mechanical insights that are critical for the adoption of sustainable 3D printing in construction, supporting climate targets such as those in the ISSB and TCFD frameworks.
👥 読者別の含意
🔬研究者:Provides a comprehensive overview of LC3 for 3D printing, highlighting research gaps and optimization strategies.
🏢実務担当者:Offers guidance on mixture design for low-carbon printable concrete, potentially reducing embodied carbon in construction projects.
🏛政策担当者:Supports evidence for promoting low-carbon binders in building codes and green procurement policies.
📄 Abstract（原文）
Additive manufacturing in construction has emerged as a promising alternative to conventional form-work-based building processes. However, most printable mixtures are rich in ordinary Portland cement OPC, which is associated with high embodied carbon and energy consumption. Active 3D concrete printing researchers are exploring limestone-based binders, specifically Limestone–Calcined Clay Cement LC3, as substitutes to OPC for a low carbon footprint. This literature review summarises recent research on LC3 as a low-carbon binder for 3D printing. Primary sources show calcined clay improves static and dynamic yield stress and buildability but reduces flowability, while limestone filler acts as a fine filler, improving particle packing and early-age hydration. Optimised LC3 mixtures achieve high yield stress and thixotropy that enable the printing of up to 23 layers while keeping good pumpability and extrudability. Fibre reinforcement increases 28-day compressive and flexural strength without clogging the nozzle. Studies report that LC3-based concretes can attain 28-day compressive strengths of 30–50 MPa while achieving up to 30–50 % reductions in CO 2 emissions relative to OPC. This review discusses rheological behaviour, mechanical properties, sustainability benefits, and mixture-optimization strategies of LC3, also pointing out research gaps and future directions for climate-positive 3D printing.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1051/bioconf/202621201022first seen 2026-06-29 07:10:36
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