Silica Fume as a Physical Dispersing Agent for Carbon Nanotubes in Cementitious Mortars: Microstructural Mechanisms, Mechanical Performance and Carbon Reduction Efficiency
セメントモルタルにおけるカーボンナノチューブの物理的分散剤としてのシリカフューム：微細構造メカニズム、機械的性能、炭素削減効率 (AI 翻訳)
Alaíde Marta dos Santos, Viviany Geraldo, Rovadávia Aline de Jesus Ribas, Wanna Carvalho Fontes, Cláudio Ernani Martins Oliveira
🤖 gxceed AI 要約
日本語
本研究では、セメントモルタルにおいてシリカフュームをカーボンナノチューブ（CNT）の物理的分散剤として利用し、機械的性能向上とセメント使用効率の改善を検討。ハイブリッドシステム（SILCNT）は、曲げ引張強度6.2%、軸圧縮強度13.7%、角柱圧縮強度16.0%の向上を示し、CO2排出指標を約20%低減した。CNTの分散におけるシリカフュームの役割が示唆された。
English
This study investigates silica fume as a physical dispersing agent for carbon nanotubes (CNTs) in cementitious mortars to enhance mechanical performance and cement-use efficiency. The hybrid system (SILCNT) achieved 6.2%, 13.7%, and 16.0% improvements in flexural tensile, axial compressive, and prismatic compressive strengths, respectively, while reducing the CO2 emission indicator by about 20%. The role of silica fume in facilitating CNT distribution is proposed.
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
ブラジルの研究だが、セメント産業のCO2削減手法として日本の建設業界にも応用可能性がある。特に、日本のカーボンニュートラル目標達成に向けた建材の低炭素化に貢献し得る。
In the global GX context
This study contributes to low-carbon construction materials, relevant for global efforts to decarbonize the cement industry. While not directly linked to disclosure frameworks like ISSB or CSRD, its findings support corporate carbon reduction strategies in the construction sector.
👥 読者別の含意
🔬研究者:The hybrid silica fume-CNT system offers a promising approach to improve mechanical and carbon efficiency in cementitious composites, warranting further microstructural studies.
🏢実務担当者:Corporations in the construction industry can consider using silica fume and CNTs to reduce cement usage and CO2 emissions while enhancing material strength.
🏛政策担当者:The results support policies promoting low-carbon construction materials and innovation in cement production to meet climate targets.
📄 Abstract（原文）
This study investigates the use of silica fume as a potential physical medium for carbon nanotube (CNT) incorporation in cementitious mortars, aiming to enhance mechanical performance and improve cement-use efficiency. Four mixtures were produced with a constant water-to-binder ratio of 0.50: a reference mortar (REF), a mortar incorporating 0.2 wt.% CNTs (REFCNT), a mortar with 10 wt.% cement replacement by silica fume (REFSIL), and a hybrid system containing both CNTs and silica fume (SILCNT). CNTs were introduced using a dry pre-mixing approach with silica fume, avoiding the use of surfactants, chemical functionalization, or ultrasonication. The incorporation of CNTs alone resulted in limited mechanical efficiency, leading to a reduction in flexural tensile strength at 7 days and marginal improvements at 28 days. In contrast, the hybrid SILCNT system exhibited the best overall performance, with increases of 6.2% in flexural tensile strength, 13.7% in axial compressive strength, and 16.0% in prismatic compressive strength at 28 days, indicating improved mechanical efficiency of the composite system. Regarding the environmental indicator (EPI), REFSIL and SILCNT showed a reduced value (0.68 kgCO2/MPa, respectively) compared to REF and REFCNT (~0.86 kgCO2/MPa). The results suggest that the combined use of silica fume and CNTs improves the mechanical efficiency of cementitious composites, leading to lower cement-based CO2 emission indicators. The role of silica fume in potentially facilitating CNT distribution is proposed as a plausible hypothesis based on indirect evidence, including mechanical performance trends and microstructural observations.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/nano16140885first seen 2026-07-22 05:15:14
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