Damage detection monitoring applications in self-healing concrete structures using embedded piezoelectric transducers and recovery

The ageing, operational and ambient loadings have a great impact in the operational and maintenance cost of concrete structures. Their service life prolongation is of utmost importance and this can be efficiently achieved by using reliable and low-cost monitoring and self-healing techniques. In the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2015-07, Vol.628 (1), p.12110
Main Authors: Karaiskos, G, Tsangouri, E, Aggelis, D G, Deraemaeker, A, Van Hemelrijck, D
Format: Article
Language:English
Subjects:
Concrete
Concrete structures
Crack initiation
Curing agents
Damage detection
Fracture mechanics
Lead zirconate titanates
Low cost
Maintenance costs
Monitoring
Physics
Piezoelectric transducers
Prolongation
Recovery
Self healing materials
Service life
Setting (hardening)
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Summary:The ageing, operational and ambient loadings have a great impact in the operational and maintenance cost of concrete structures. Their service life prolongation is of utmost importance and this can be efficiently achieved by using reliable and low-cost monitoring and self-healing techniques. In the present study, the ultrasonic pulse velocity (UPV) method using embedded small-size and low-cost piezoelectric PZT (lead zirconate titanate) ceramic transducers in concrete with self-healing properties is implemented for monitoring not only the setting and hardening phases of concrete since casting time, but also for the detection of damage initiation, propagation and recovery of integrity after healing. A couple of small-scale notched unreinforced concrete beams are subjected to mode-I fracture through three-point bending tests. After a 24-hour healing agent curing period, the beams are reloaded using the same loading scenario. The results demonstrate the excellent performance of the proposed monitoring technique during the hydration, damage generation and recovery periods.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/628/1/012110