Advanced monitoring sensor and self-repairing system for cracks in concrete structures

Title: Advanced monitoring sensor and self-repairing system for cracks in concrete structures
Author(s): H. Mihashi, T. Nishiwaki, K. Miura, Y. Okuhara
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 401 - 409
Total Pages: 9
Nb references: 8
Language: English

Abstract: Cracking in concrete structures is one of the main sources to cause deterioration of the structures. Crack detection at an early stage of damage in the structure is important for effective repairing and retaining the structure. Usually visible observation and/or monitoring by various types of sensors are adopted to assess existing structures but repairing is afterwards separately carried out. If the repairing is too late to be executed, it becomes less effective and even causes a lot of difficulties to be repaired. Furthermore, for very special structures to which workers cannot approach for repairing, it is essential to apply a self-repairing system to the structure.
In this study, a self-repairing system for concrete structures has been developed, which is composed of self-diagnosis composite bars and of pipes made with heat-plasticity film. The self-diagnosis composite is a kind of crack monitoring sensor that has a function of heating device. Once crack occurs crossing the sensor, electric resistance locally increases and it can selectively heat around the generated crack by electrification. Then the pipe is melted to release the repair agent for filling the crack.
In this paper, an advanced crack monitoring sensor is proposed and the outline of the selfrepairing system is presented.

Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00