Title: Tailoring The Piezoresistive Sensing of CNT Reinforced Mortar Sensors
Author(s): Maria S. Konsta-Gdoutos, Panagiotis A. Danoglidis, and Surendra P. Shah
Publication: Symposium Paper
Appears on pages(s): 12-26
Keywords: Carbon nanotubes, mortars, Self-sensing ability, piezoresistivity, multifunctionallity, Young`s modulus, fracture toughness
The piezoresistive response and self-sensing ability of carbon nanotube reinforced mortar sensors have been investigated. The study aims on optimizing the development of a self-sensing nanoreinforced cement-based sensor for monitoring and evaluating the condition of concrete elements, in real time applications. It has been shown that the piezoresistive response of the nanomodified mortars was substantially enhanced just by adding a low amount of carbon nanotubes (CNTs), 0.1 wt%. Resistance measurements, using direct current (DC) and alternating current (AC), were conducted under the application of cyclic or monotonic compressive loading. The results show the sensor’s great ability to detect crack propagation and damage accumulation at all stages of deformation up to failure.