碳纳米管砂浆力学性能和压阻性能研究

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中图分类号：TU525.9 文献标志码：A 文章编号：1003-5168（2025）22-0094-06

DOI： 10.19968/j.cnki.hnkj.1003-5168.2025.22.016

Study on Mechanical Properties and Piezoresistive Properties of Carbon Nanotube Mortar

XUE Ganghong ZHU Yongzhen （Bureau of Public Works of Shenzhen Municipality，Shenzhen 518ooo， China）

Abstract：[Purposes] To explore the influence of carbon nanotubes on the mechanical properties and piezoresistive propertiesof cement mortar.[Methods] Cement mortar samples reinforced with different dosages （0， 0.05 wt%， 0.10wt% ， 0.15wt% ） of carbon nanotubes were prepared， and their compressive strength and flexural strength were tested. Meanwhile，the resistivity of the carbon nanotubereinforced cement mortar samples during loading was measured using a piezoresistive tester.[Findings] Compared with the ordinary cement mortar sample，the compressive strength of the mortar was increased by 29.29% at the dosage of 0.10wt% carbon nanotubes，while the flexural strength of the mortar was increased by 33.6% at the dosage of 0.15wt% carbon nanotubes; In addition，under uniaxial compressive load，the addition of carbon nanotubes could effectively improve the piezoresistive properties of the cement mortar，among which the 0.10wt% carbon nanotube dosage had the most significant effect on enhancing the piezoresistive properties of the cement mortar.[Conclusions]A reasonable content of carbon nanotubes can improve the mechanical and piezoresistive properties of cement mortar.

Keywords： cement mortar; carbon nanotubes;compressive strength； flexural strength； piezoresistive properties

0 引言

碳纳米管是通过单层或者多层石墨片卷曲闭合而成的纳米级纤维材料[1-2]。（剩余7189字）