Concrete with triphasic conductive materials for self-monitoring of cracking development subjected to flexure

• Autor(a) principal: Yining Ding
• Data de Publicação: 2016
• Outros Autores: Zhibo Han, Zhang, Yulin, Aguiar, J. L. Barroso de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Texto Completo: https://hdl.handle.net/1822/39919
• topic: Conductive concrete; Self-monitoring of concrete cracking; Crack opening displacement; Fractional change in resistance; Nano carbon black; Fibers; Hybrid effect; Ciências Naturais::Matemáticas; Engenharia e Tecnologia::Engenharia dos Materiais; Science & Technology

In this study, the macro steel fiber (SF), carbon fiber (CF) and nano carbon black (NCB) as triphasic conductive materials were added into concrete, in order to improve the conductivity and ductility of concrete. The influence of NCB, SF and CF on the post crack behavior and conductivity of concrete was explored. The effect of the triphasic conductive materials on the self-diagnosing ability to the load–deflection property and crack widening of conductive concrete member subjected to bending were investigated. The relationship between the fractional change in surface impedance (FCR) and the crack opening displacement (COD) of concrete beams with conductive materials has been established. The results illustrated that there is a linear relationship between COD and FCR.