掺纳米碳纤维导电水泥基材料的制备

通过调节减水剂掺量改变水泥净浆或砂浆的流变性能,并研究了固定纳米碳纤维条件下试件的电阻率平均值与变异系数。结果表明:适当提高水泥净浆或砂浆的流动性或降低屈服剪切应力、塑性粘度,有利于降低掺纳米碳纤维水泥基材料的电阻率,提高导电稳定性;过高或过低的流变参数均不利于稳定的导电水泥基材料制备。

PREPARATION OF CONDUCTIVE CEMENT BASED MATERIAL WITH CARBON NANOFIBER

In this paper,the rheological properties of cement paste or mortar were changed by adding different dosages of superplasticizer,and the average resistivity and the variation coefficient of specimens were studied at the same content of carbon nanofibers.The results show that the resistivity of cement-based materials containing carbon nanofibers is reduced but the conductivity stability is improved when the fluidity of cement paste or mortar has a proper increase or the shear yield stress and the plastic viscosity are reduced to a certain extent.Too high or too low rheological parameters are disadvantageous for preparing cement based materials with a stable conductivity.