Application of the self diagnosis composite into concrete structure

H. Matsubara, S. G. Shin, Y. Okuhara, H. Nomura, H. Yanagida

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

The function and performance of the self-diagnosis composites embedded in mortar / concrete blocks and concrete piles were investigated by bending tests and electrical resistance measurements. Carbon powder (CP) and carbon fiber (CF) were introduced in glass fiber reinforced plastics composites to obtain electrical conductivity. The CP composite has commonly good performances in various bending tests of block and pile specimens, comparing to the CF composite. The electrical resistance of the CP composite increases in a small strain to response remarkably micro-crack formation at about 200 μ strain and to detect well to smaller deformations before the crack formation. The CP composite possesses a continuous resistance change up to a large strain level near the final fracture of concrete structures reinforced by steel bars. The cyclic bending tests showed that the micro crack closed at unloading state was able to be evaluated from the measurement of residual resistance. It has been concluded that the self-diagnosis composite is fairly useful for the measurement of damage and fracture in concrete blocks and piles.

Original languageEnglish
Pages (from-to)36-43
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4234
DOIs
Publication statusPublished - 2001 Jan 1
EventSmart Materials - Melbourne, VIC, Australia
Duration: 2000 Dec 132000 Dec 15

Keywords

  • Carbon
  • Composites
  • Concrete
  • Electrical resistance
  • FRP
  • Fracture
  • Intelligent materials
  • Pile
  • Self-diagnosis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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