人工サンゴ向け3Dプリントコンクリートへの廃材統合：低炭素でスマートな沿岸都市への道筋
Integrating waste materials in 3D-printed concrete for artificial coral: a pathway to low-carbon and smart coastal cities (原題)
Loan Thi Pham, Jieyi Huang
🤖 gxceed AI 要約
日本語
石炭灰と鉱山廃石砂を25%・50%置換した3Dプリントコンクリートで人工サンゴ礁ユニットを試作。力学試験で異方性を評価し、取扱い・設置に十分な強度を確認した。クレードル・トゥ・サイトLCAでは300kgブロック当たり93.38kg CO₂eで、従来のプレキャスト品比22%削減。廃材置換と型枠撤去が主因で、低炭素な沿岸インフラの実現可能性を示す。
English
A printable concrete with 25% fly ash and 50% crushed mining-waste sand was used to 3D-print a biomimetic artificial coral unit. Mechanical tests confirmed sufficient strength for handling and deployment despite anisotropy. Cradle-to-site LCA shows 93.38 kg CO2e per 300-kg block, a 22% reduction versus conventional precast, driven by waste substitution and formwork elimination.
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
建設分野のScope 3・ embodied carbon 削減はSSBJや有報のサステナビリティ開示で重要性が増す論点。廃棄物由来材料と3Dプリントによる型枠削減の定量効果は、建設業の脱炭素投資判断やグリーンインフラ調達の参考になる。
In the global GX context
Embodied-carbon accounting in construction is increasingly material to ISSB/CSRD disclosure and green procurement. This paper offers a replicable LCA method for waste-based 3D printing, though its niche reef application limits direct transfer to mainstream building decarbonization.
👥 読者別の含意
🔬研究者:廃材置換と型枠撤去を分離したLCA手法は、建設資材のembodied carbon研究の比較基準として有用。
🏢実務担当者:建設・沿岸インフラ企業は、廃材活用3Dプリントによる型枠削減と炭素削減効果を調達・設計の参考にできる。
🏛政策担当者:廃棄物由来材料の建設利用を促す規制・公共調達の設計に、定量炭素削減根拠として参照可能。
📄 Abstract（原文）
Abstract This study investigates a low-carbon, waste-integrated concrete mixture for fabricating artificial coral units using three-dimensional concrete printing (3DCP). Fly ash from coal combustion and crushed sand from non-hazardous mining waste rock were incorporated at 25% and 50% replacement levels, respectively, to develop a printable, structurally stable mixture. A biomimetic coral geometry was designed and successfully fabricated using an extrusion-based 3DCP system. Mechanical testing was conducted on six flexural and twelve compressive specimens per printing orientation to evaluate anisotropic behavior. The results confirmed adequate mechanical capacity for handling and deployment of the hollow printed modules. A cradle-to-site life cycle assessment revealed that the 3D-printed unit has an embodied carbon footprint of 93.38 kg CO₂e per 300-kg block, representing a consistent 22% reduction compared to a conventional prefabricated counterpart, with formwork-related emissions, material waste, and transport distances standardized. This carbon advantage derives primarily from waste-material substitution and the elimination of temporary formwork. The findings demonstrate that waste-based 3DCP offers a technically feasible and environmentally advantageous solution for artificial reef production, contributing to sustainable, low-carbon, and ecologically responsive coastal infrastructure.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s44242-026-00123-yfirst seen 2026-10-21 04:40:14
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