Mechanical and Strain-Sensing Properties of Cement-Matrix Composite Containing Nano-Sized Carbon Black

Abstract

An experimental researches was performed for carbon black-reinforced cement-matrix composites. The carbon black used was in the form of particles with a nano-size. Results show that when content of the carbon black is between 0.25% and 0.75% by weight of cement, both flexural and compressive strengths of the composite can be enhanced. Flexural strength increases up to 9.69%, and compressive strength increases up to 6.92%, respectively. Moreover, the carbon black-reinforced composite is of high strain-sensing ability. The fractional change in resistance () increases monotonically upon compressive loading, and decreases monotonically upon unloading. These properties indicate that the carbon black-reinforced composite can be used for structural function, while at the same time act as a strain sensor itself. Compared with carbon fiber-reinforced composites, the carbon black-reinforced composite has a low price and is easy for mixing.

[Retracted] Experimental Analysis of Mechanical Properties and Durability of Cement‐Based Composite with Carbon Nanotube

“…e carbon nanotubes used in the experiment include common multiwall carbon nanotubes (IMC6) and common carboxyl MWCNTs (IMC6-CH), which are produced by Beijing Boyu Hi-Tech New Material Technology Co., Ltd. [11]. IMC6-CH is a modified carboxylated derivative of IMC6 treated by chemical oxidation in liquid phase.…”

Effect of Environmental Exposure on the Pore Structure and Transport Properties of Carbon Nanotube-Modified Mortars

“…The imperative need to improve the performance of conventional cementitious materials and to impart multi-functionality and smartness in structures has stimulated great scientific interest towards the use of carbon-based nano-inclusions in cementitious materials [ 13 , 14 , 15 , 16 , 17 ]. Many studies, based on microstructural analysis, suggest that carbon nanotubes (CNTs) contribute to the refinement of the pore network as well as bridging of micro-cracks [ 18 , 19 , 20 , 21 , 22 , 23 ].…”