酸化碳纳米管增强水泥基复合材料的力学性能及碳纳米管在水泥基复合材料中的微观研究

中原工学院硕士学位论文Abstract挠曲强度最大为9.3MP,较素水泥砂浆提高了47.6%。实验结果证明，酸化之后的碳纳米管掺量在0.05%时，其试块的抗压强度、抗折强度、挠曲强度达到最大，随后随着摻量的增加其强度逐渐降低：(4)利用纳米压痕仪测试掺加碳纳米管的水泥浆的弹性模量和硬度，试验发现碳纳米管摻量在从0.0%到0.08%的过程中，水泥浆的弹性模量均值从26.1GPa提高到28.8GP,硬度均值没有太大影响。随着碳纳米管摻量的增加，低密度硅酸钙凝胶的体积分数逐渐降低，高密度硅酸钙凝胶的体积分数逐渐增加。关键词：碳纳米管：抗压强度：挠曲强度；硬度：弹性模量；水泥基材料；力学性能：纳米压痕仪The mechanical properties of the cement-based compositesreinforced by the acidified carbon nanotubesMajor:Architectural And Civil EngineeringStudent Name:Chen Xing YuSupervisor:Wang Jing YanAbstractDue to carbon nanotubes or winding in cement slurry are prone to get together,sothe influence of carbon nanotubes reinforced cement base composite materialsmechanics performance is one of the indicators of carbon nanotubes can gooddispersed in the slurry.Polyvinyl pyrrolidone (PVP)dispersants have been found bysome researchers in recent years to be able to disperse carbon nanotubes incement-based materials.But even then,the van der Waals attraction between carbonnanotubes still affects the dispersion of carbon nanotubes in the water mud.In thispaper,carbon nanotubes are treated with dichloromethane and interchlorinatedperoxybenzoic acid to study the effect of carbon nanotubes on the mechanicalproperties of cement-based composites.Because carbon nanotubes have been widelyused in recent years,theory and practice have proved that they have excellentmechanical and photoelectric properties.In this paper,the variation of elastic modulusand hardness is studied by using nanometer indentation instrument.The main research