Microscopic reinforcement for cement based composite materials

Mingli Cao; Cong Zhang; Jianqiang Wei

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Microscopic reinforcement for cement based composite materials

机译：水泥基复合材料的微观增强

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摘要

Restriction of propagation and coalescence of cracks at microscopic level is one of the most effective means to achieve high properties of cement based composite. In order to improve the properties of cement based composite microcosmically, calcium carbonate whisker was introduced as a kind of micro-reinforcer. The effects of whisker on macro and micromechanical properties, fracture morphology, micro-structures, and crack resistance of the composite with different water to binder ratios, as well as the reinforcing mechanisms were studied. The results indicated that whiskers are effective in delaying the formation and propagation of microcracks. The micromechanical mechanism is relative to the bond properties between whiskers and cement matrix. An appropriate interfacial bond strength is advantageous to optimize the reinforcing effect of whisker in cement based composite.

机译：在微观水平上限制裂纹的扩展和合并是实现水泥基复合材料高性能的最有效手段之一。为了从微观上改善水泥基复合材料的性能，引入了碳酸钙晶须作为一种微增强剂。研究了晶须对不同水胶比的复合材料的宏观和微观力学性能，断裂形态，微观结构和抗裂性的影响，以及增强机理。结果表明，晶须有效地延迟了微裂纹的形成和传播。微观力学机制与晶须和水泥基体之间的粘结性能有关。适当的界面粘结强度有利于优化水泥基复合材料中晶须的增强效果。

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来源
《Construction and Building Materials》 |2013年第3期|14-25|共12页
作者
Mingli Cao; Cong Zhang; Jianqiang Wei;
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作者单位

School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;

School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;

Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
calcium carbonate whisker; cement based composite; reinforcement; microstructure; mechanical property;

机译：碳酸钙晶须;水泥基复合材料加强;微观结构机械性能;

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Microscopic reinforcement for cement based composite materials

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