Direct Shear Study of Strengthening Layer Made of Continuous Carbon Fiber Fabric-Magnesium Oxychloride Cement Paste
Direct Shear Study of Strengthening Layer Made of Continuous Carbon Fiber Fabric-Magnesium Oxychloride Cement Paste
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发表时间：
2011
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通讯作者：
Wei Lin;Wei Sun;Zongjin Li
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作者：
Wei Lin;Wei Sun;Zongjin Li
采用直剪法对连续碳纤维织物-氯氧镁水泥（MOC）浆体的增强层进行了试验研究。通过延长固化时间、增加含水量、添加硅灰和添加有机粘结剂（环氧树脂）等方法，探讨了MOC浆料粘结性能的改善。分析了改进的机理。结果表明，延长固化时间、添加硅灰和添加有机粘结剂代替水可以提高MOC浆料的粘结性能。硅灰是一种超细粉末，当其使用水平为10%（质量）时，可以很好地分散在MOC浆料中，填充在碳纤维之间的空隙中。因此，MOC浆料可以更好地包裹碳纤维，提高浆料的粘接性能。有机粘结剂也能很好地分散，充分发挥作用，提高MOC浆料的粘结性能。由于MOC浆料对连续碳纤维织物的渗透性能较低，因此MOC浆料作为粘结剂的性能不如有机粘结剂。
Strengthening layer made of continuous carbon fiber fabric-magnesium oxychloride cement (MOC) paste was tested by direct shear.Improvement of bonding performance of MOC paste was explored by extending curing time,increasing water content,adding silica fume and adding organic binder(epoxy resin). The mechanism of the improvement was analyzed.The results indicate that the bonding performance of MOC paste can be improved by extending curing time,adding silica fume and adding organic binder instead of adding water.Silica fume is a kind of superfine powder,when its use level is 10%(by mass),it can be well dispersed in MOC paste and filled in the gaps between carbon fibers.Thus,the carbon fiber can be wrapped better by MOC paste to increase the bonding performance of the paste.And the organic binder can also be well dispersed to play the full role to improve the bonding performance of MOC paste.Because of the lower infiltrating property of MOC paste to the continuous carbon fiber fabric,MOC paste as the binder is not as good as organic binder.