纤维改性磷酸镁水泥性能的研究  

The research of fiber modified magnesium-phosphate cements

作　　者：李悦[1,2,3] 孙佳[1,2,3] 施同飞 

机构地区：[1]北京工业大学,北京100124 [2]城市与工程安全减灾教育部重点实验室,北京100124 [3]工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《河北工业大学学报》2014年第6期1-4,共4页Journal of Hebei University of Technology

基　　金：国家科技支撑项目(2011BAE27B04-7);教育部"新世纪优秀人才支持计划"(NCET-12-0605);北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD20150310)

摘　　要：为了探求纤维对MPC性能的影响,制备了不同掺量的聚丙烯纤维和聚丙烯腈纤维复合MPC,测试纤维增强MPC的流动性、抗压强度和微观结构.结果分析发现,在一定条件范围内,随着纤维的掺量的增加,MPC浆体的流动性逐渐降低,聚丙烯腈纤维对MPC浆体的流动性影响要大于聚丙烯纤维对其流动性的影响.在一定掺量范围内,掺加聚丙烯纤维和聚丙烯腈纤维对MPC试件的抗压强度都没有明显影响,而抗折强度先增加后稳定;掺加聚丙烯腈纤维对MPC试件的抗折强度影响更大;微观分析发现,对于MPC试件,掺加聚丙烯纤维的的分散性好于聚丙烯腈纤维,并且MPC中的化学反应对纤维不产生损伤.In order to investigate the effects of fibers on MPC composite, MPC specimens incorporating polypropylene fibers and polyacrylonitrile fibers with different dosages were prepared. Fluidity, compressive strength and microstructure of MPC composite were tested. Within a certain range of conditions, the fluidity of MPC paste decreases with the increase of fiber addition, and the effect ofpolyacrylonitrile fiber on MPC paste is larger than that ofpolypropylene fiber. Within a certain dosage, both the addition of polypropylene fibers and polyacrylonitrile fibers have no significant effect on compressive strength of MPC specimen, while flexural strength increases and then becomes stable. The addition ofpolyacrylonitrile fibers has a larger effect on the flexural strength of MPC specimen. Microscopic analysis shows that the dispersibility ofpolypropylene fiber in MPC specimens is better than that ofpolyacrylonitrile fiber. In addition, the chemical reaction of MPC does no harm to fibers.

关 键 词：磷酸镁水泥 纤维复合 性能 微观结构 

分 类 号：TU528.58[建筑科学—建筑技术科学]