Title: Flexural Behavior of Carbon Fiber Textile-Reinforced Concrete I-Section Beams

Author(s): Kissila Botelho Goliath, Daniel C. T. Cardoso, and Flavio de A. Silva

Publication: Symposium Paper

Volume: 345

Issue:

Appears on pages(s): 196-206

Keywords: Textile Reinforced Concrete (TRC), I-section beam, Carbon textile, flexural behavior

DOI: 10.14359/51731581

Date: 2/1/2021

Abstract:
Textile-reinforced concrete (TRC) is a composite material resulting from the combination of finegrained concrete and textile reinforcement, widely used to strengthen existing structures. In addition, TRC is an alternative to obtain lighter and thinner structures. However, the behavior of these structures depends on the properties of the matrix and fiber used, as well as on the interface between these two phases. In this work, the interface properties of SBR-based carbon textile-reinforced concrete as supplied and after sand-coating treatment are evaluated through pullout tests. Then, to assess the bending behavior of structural members, four-point bending tests were performed on I-section beams using textiles with and without surface treatment. To analyse the evolution of cracking, digital image correlation (DIC) technique was used. The effectiveness of epoxy-sand treatment surface in textile reinforcement improve the bond between textile as well matrix as the failure mode of TRC beams and was confirmed by improved interface properties, i.e. a stiffer and stronger interface was obtained. In addition to the improved crack pattern, it was observed smaller and less spaced cracks.