ポリプロピレンとベースアルト繊維による高性能自己圧縮コンクリートの機械性能と性に関する比較研究
Piotr Smarzewski1, Anna Jancy1
1Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. Sylwestra Kaliskiego, 00908 Warsaw, Poland.
Materials (Basel, Switzerland)
|August 28, 2025
まとめ
この研究は,ポリプロピレン (PP) とベースアルト (BF) 繊維が自己圧縮コンクリート (SCC) の機械的性質を高めることを示しています. PP繊維は早期の強度とタフさで優れていますが,BF繊維はクラッキング後の抵抗とエネルギー吸収を高めています.
科学分野:
- 材料科学
- 土木工学
- コンクリート技術
背景:
- 自己圧縮コンクリート (SCC) は,配置と整合の利点を提供します.
- 特に高性能コンクリート (HPC) の機械的性質の向上は,構造用途において極めて重要です.
- 繊維強化はコンクリートの性能を改善するための共通の戦略です.
研究 の 目的:
- ポリプロピレン (PP) とベースアルト (BF) 繊維で強化されたSCCの屈折性能,引力分裂強度,および破裂の振る舞いを調査する.
- 異なる用量 (0.025-0.25%) でPPとBF繊維のSCC特性に対する有効性を比較する.
- 繊維強化HPCにおける機械的強化と可動性の間のトレードオフを理解する.
主な方法:
- PPとBFの繊維の種類と体積分によって異なる11のSCC混合物が製造された.
- 7日と28日に,屈折性能,引力分裂強度,および骨折の振る舞いを含む機械的性質を試験した.
- 統計分析 (ANOVAとTukeyのテスト) を用い,結果の有意性を検証した.
主要な成果:
- PPとBFの両方の繊維は,SCCの伸縮性能を向上させました.
- PP繊維は,特に幼年期に,0. 125%の投与で,割れ引きの強さを最大45%と,屈折の強さを300%以上高めました.
- BF繊維は28日間の耐久性 (最大15. 7J) と破裂後の耐久性を有意に高め,0. 125- 0. 25%の投与で最適な性能を示した.
- 繊維の添加,特に高い含有量では,加工能力が低下し,BF繊維はより顕著な効果を持っています.
結論:
- PPとBFの繊維はSCCに明確な利点をもたらし,PPは早期の柔らかさで,BFはピーク後のエネルギー吸収で優れています.
- 最適な繊維用量は,PPで0.05-0.125%で,BFでは0.125-0.25%でした.
- この研究は,持続可能なSCC構造アプリケーションのための適切な繊維タイプと用量を選択するための貴重な洞察を提供します.
- ハイブリッドファイバーシステムと長期的な耐久性に関するさらなる研究が推奨されています.
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