The I-V characteristics and compressive strengths of multi-walled carbon nanotube reinforced cement composite(NFRC)

Four suspended solutions with multi-walled carbon nanotube(NMWT) dispersion were processed by surfactant ultrasonic dispersion approach.Hereby,those correspondent solutions were incorporated into cement matrix,mix cast NMWT reinforced cement composite(NFRC),respectively.The ampere-volt characteristics with four-electrode testing technique and compressive strengths of four groups NFRCs were investigated,in contrast with those of the plain specimens.Results show that,due to the steric and electrostatic repulsion effect resulted from the hydrophilic and hydrophobic group characteristic,PAA has some improvement on the dispersivity of NMWT,yet only to a limited extent.The I-V characteristic and mechanical property of the correspondent NFRC could have some enhancement with the increment of NMWT loading:the resistivity(ρ) of NFRC has the trend of firstly falling down,hereafter climbing up,then falling down again;the compressive strength(σc) has the trend of being firstly improved,hereafter steadily weakened.