Polymer Emulsion Modified Aramid Fibers Reinforced Cementitious Composites
Polymer Emulsion Modified Aramid Fibers Reinforced Cementitious Composites
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DOI：
10.4028/www.scientific.net/amr.821-822.1244
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
Ying Wu;Qianyao Sun;H. Fang;Lian Kong;C. Xu
中科院分区：
文献类型：
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作者：
Ying Wu;Qianyao Sun;H. Fang;Lian Kong;C. Xu
研究了两种聚合物乳液对纤维增强水泥基复合材料抗折强度的影响。用扫描电子显微镜（SEM）观察了改性复合材料的断裂界面形貌.实验结果表明，与未改性的复合材料相比，环氧乳液和伊娃乳液改性的芳纶纤维增强水泥基复合材料的早期抗折强度得到了显着提高，与静置28 d的原始样品相比，分别增加了34.21%和133%。纤维、水泥和骨料界面的微观分析揭示了一种新的破裂剥离机理。伊娃乳液改性样品的防静电效果高于环氧树脂改性样品。
The influence of two kinds of polymer emulsions on the flexure strength of armid fibers reinforced cementitious composites has been investigated. The morphology of fractural interface of modified composites is conducted by scanning electron microscopy (SEM). Our experiment results indicated that the early flexural strengths of the epoxy emulsion and EVA emulsion modified aramid fiber reinforced cementitious composites have been improved significantly in comparison with that of unmodified composites, that is, an increase of 34.21%, 133% observed versus pristine samples curried for 28 d, respectively. The microscopic analysis on the interface between fibers, cement and aggregates revealed a novel rupturing and stripping mechanism. The efficacy of EVA emulsion modified samples is higher than that of epoxy modified ones.