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《材料导报》期刊社  2017, Vol. 31 Issue (24): 6-9    https://doi.org/10.11896/j.issn.1005-023X.2017.024.002
  第一届先进胶凝材料研究与应用学术会议 |
玻璃纤维对磷酸镁水泥砂浆力学性能的增强作用及机理
方 圆,陈 兵
上海交通大学土木系,上海 200240
The Enhancement and Mechanism of Glass Fiber on Mechanical Properties of Magnesium Phosphate Cement Mortar
FANG Yuan, CHEN Bing
College of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240
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摘要 添加不同体积比的玻璃纤维,按照一定比例配制玻璃纤维增强磷酸镁水泥。研究了玻璃纤维增强磷酸镁水泥的抗压强度、抗折强度以及耐水性,并采用电镜扫描的方法对其微观结构进行了观察。研究结果表明,玻璃纤维对磷酸镁水泥的抗压强度和抗折强度都有一定贡献,其中纤维的最佳体积掺量约为2.5%,但超过最佳掺量后,抗压和抗折强度都有所降低。另外,实验结果还表明,稍过量的玻璃纤维能够暂时“包裹”未反应基材,可能在浸水环境中发生又一轮反应,从而抵消因浸水造成的强度损失,这可能是一种改善磷酸镁水泥耐水性的新方法。此外,本工作提供了与实验结果一致的纤维增强机理的可能解释。
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方 圆
陈 兵
关键词:  玻璃纤维  磷酸镁水泥  抗压强度  抗折强度  耐水性    
Abstract: An experimental investigation into the compressive strength, the flexural strength and the water resistance of magnesium phosphate cement (MPC) mortar reinforced by glass fiber was conducted. Four fiber volume fractions of 1.5%, 2.5%, 3%, 3.5% were designed for the experiments. The microstructure, mechanical and water resistance properties of fiber-reinforced MPCs were evaluated with respect to the variance in the fiber volume fraction. The results showed that the glass fibers had more pronounced effects on the flexural strength compared to compressive strength. The optimum volume fraction of glass fiber was reported at 2.5%. Furthermore, the effect of glass fiber on the water resistance of MPC was discussed, and a “reserving” method to resist the strength loss by water was provided. In addition, a possible explanation of the fiber reinforcement mechanism which is in agreement with the experimental results was proposed.
Key words:  glass fiber    magnesium phosphate cement    compressive strength    flexural strength    water resistance
               出版日期:  2017-12-25      发布日期:  2018-05-08
ZTFLH:  TU528.2  
基金资助: 国家自然科学基金(51778363)
作者简介:  方圆:女,1993年生,硕士研究生,研究方向为新型建筑材料 陈兵:男,1973年生,博士,研究员,博士研究生导师,主要从事新型建筑材料的研发与性能表征 E-mail:hntchen@sjtu.edu.cn
引用本文:    
方 圆,陈 兵. 玻璃纤维对磷酸镁水泥砂浆力学性能的增强作用及机理[J]. 《材料导报》期刊社, 2017, 31(24): 6-9.
FANG Yuan, CHEN Bing. The Enhancement and Mechanism of Glass Fiber on Mechanical Properties of Magnesium Phosphate Cement Mortar. Materials Reports, 2017, 31(24): 6-9.
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http://www.mater-rep.com/CN/10.11896/j.issn.1005-023X.2017.024.002  或          http://www.mater-rep.com/CN/Y2017/V31/I24/6
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