Impact of incorporating graphene nanoplatelet dispersions on strength development of low-carbon cementitious matrices
低炭素セメント系マトリックスにおけるグラフェンナノプレートレット分散の強度発現への影響 (AI 翻訳)
Ernests Ozolins, Artūrs Mačanovskis, Nikola Sinica, Maris Tupesis
🤖 gxceed AI 要約
日本語
本研究では、低炭素セメント（CEM III等）の初期強度不足を解決するため、グラフェンナノプレートレット（GNP）分散液の添加効果を検討した。実験の結果、GNPの効果はバインダー化学と投与量に強く依存し、スラグ含有系では強度低下が見られたが、CEM II/B-Mでは微少量投与で24時間で5%の強度向上が確認された。この知見は、低炭素セメントの実用化におけるナノ材料の可能性を示す。
English
This study investigates graphene nanoplatelet (GNP) dispersions to accelerate early strength in low-carbon cement (CEM III). Results show binder-chemistry-dependent effects: slag-containing systems often reduced strength, but microdosing in CEM II/B-M achieved 5% strength gain at 24 hours, persisting to 28 days. GNP can be beneficial in compatible binders, but replication is needed.
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、セメントの脱炭素化は急務であり、本研究成果は低炭素セメントの早期強度向上に資する可能性がある。特に、カーボンニュートラルポートやインフラ更新におけるGX推進に貢献し得る。
In the global GX context
Globally, the cement industry accounts for ~7% of CO2 emissions. This paper addresses a key technical barrier to using low-carbon cements (CEM III) in precast applications, supporting decarbonization without sacrificing production speed. The findings inform material innovation for construction sector's net-zero targets.
👥 読者別の含意
🔬研究者:Reveals binder chemistry as dominant factor in GNP dispersion effect, suggesting future work on tailored nanomaterials for different cement types.
🏢実務担当者:Provides initial data for precast manufacturers considering GNP to accelerate low-carbon cement curing; however, benefits are binder-specific and require validation.
🏛政策担当者:Supports innovation in low-carbon materials; could inform R&D funding priorities for industrial decarbonization.
📄 Abstract（原文）
The precast concrete industry faces the dual challenge of decarbonisation and the requirement for rapid early-age strength development. While CEM III binders significantly reduce global warming potential, they suffer from slow hydration kinetics, typically delivering insufficient 24-hour demoulding strength. This research investigates the curing-accelerating potential of graphene nanoplatelet (GNP) dispersions acting as heterogeneous nucleation seeds in cementitious matrices with varying slag content. Experimental mortar samples were produced according to EN 196-1 across two test series. In the conventional dosage series, three binder systems (CEM I 52.5N, CEM III/B 32.5N, CEM II/B-M 52.5N) were investigated at pure graphene dosages of 0.02-0.10% by binder mass at w/c 0.50; hardened specimen density was determined according to EN 12390-7. In the microdosing series, pure graphene contents of 0.0002-0.0014% by binder mass were applied to CEM II/B-M, CEM III/B, and a hybrid CEM III/B + CEM I blend. Compressive strength was assessed at 24 hours, 7 days, and 28 days and flexural strength at 7 and 28 days. Results indicate a strongly binder-dependent and dosage-dependent response. In the conventional series, slag-containing systems showed strength reductions and systematic density decreases consistent with surfactant-induced air entrainment, whilst CEM I exhibited slight densification, consistent with a binder-chemistry-driven mechanism while still reducing strength. In the microdosing series, CEM II/B-M was the only system to show consistent indicative positive strength gains, reaching 5% at 24 hours, with gains persisting to 28 days. CEM III/B and the hybrid blend showed reductions at all ages. These findings indicate that binder chemistry governs the graphene dispersion effect even at concentrations far below those previously reported, and that beneficial effects in compatible systems appear to persist to 28 days; confirmation through replicated testing is recommended.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.22616/erdev.2026.25.tf069first seen 2026-06-20 05:30:24
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