Fundamental study on waterproof performance and evaluation of repair agent filling level of self-repairing system for cracked concrete

Author(s): Hiroto Tanaka, Keiichi Imamoto, Chizuru Kiyohara
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 78-85
Total Pages: 813
Language: English

Abstract: This study aims at prevention of reinforcement corrosion due to water leakage through concrete cracks. The authors propose a self-repairing system for cracked concrete. A glass tube containing a repair agent is embedded near a steel bar. When concrete cracks occur and rupture the glass tube, the repair agent enters the cracks and repairs them. This research presents an investigation of the capability of such a system using several kinds of concrete specimens. Water permeability testing was carried out to investigate the waterproofing performance of the system. Additionally, ultrasonic testing was conducted to confirm that the repair agent filled the cracks in the concrete specimens. It was found that the performance of the repair agents depended on their viscosities, wherein specimens with ultralow-viscosity repair agent exhibited best performance to prevent water penetration. Furthermore, analysis of the specimens using such a system showed that the repair agent filled the concrete cracks as well as the area around the reinforcing bars. The experimental results suggested that the system successfully prevents corrosion of reinforcement due to water leakage through cracks in concrete.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00