Electrical Resistivity of Concrete

Title :
Effect of compressive strain on electrical resistivity of carbon black-filled cement-based composites

Authors :
Hui Li, Hui-gang Xiao, Jin-ping Ou

Abstract :

This paper investigates the strain sensing properties of carbon black (CB)-filled cement-based composites which were prepared with 120 nm CB. A linear relationship between the fractional change in resistivity and compressive strain was observed for cement-based composites containing a large amount of CB, suggesting that this kind of composite was a promising candidate for strain sensors used in concrete structures. Tunneling effect theory and percolation theory are employed to interpret the conductivity and electromechanical properties of CB-filled cement-based composites.

Keywords :
Electrical properties, Smart materials

Source :
http://www.sciencedirect.com/science/article/pii/S0958946506000874