Conference proceeding
Material property assessment and crack identification of recycled concrete with embedded smart cement modules
Proceedings of SPIE, Vol.7981(1), pp.79814V-79814V-13
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
04/21/2011
Handle:
https://hdl.handle.net/2376/109165
Abstract
In this paper, the material property assessment and crack identification of concrete using embedded smart cement
modules are presented. Both the concrete samples with recycled aggregates (RA) and natural aggregates (NA) were
prepared. The smart cement modules were fabricated and embedded in concrete beams to serve as either the actuators or
sensors, and the elastic wave propagation-based technique was developed to detect the damage (crack) in the recycled
aggregate concrete (RAC) beams and monitor the material degradation of RAC beams due to the freeze/thaw (F/T)
conditioning cycles. The damage detection results and elastic modulus reduction monitoring data demonstrate that the
proposed smart cement modules and associated damage detection and monitoring techniques are capable of identifying
crack-type damage and monitoring material degradation of the RAC beams. Both the RAC and natural aggregate
concrete (NAC) beams degrade with the increased F/T conditioning cycles. Though the RAC shows a lower reduction
percentage of the modulus of elasticity from both the dynamic modulus and wave propagation tests at the given maximum F/T conditioning cycle (i.e., 300 in this study), the RAC tends to degrade faster after the 180 F/T cycles. As observed in this study, the material properties and degradation rate of RAC are comparable to those of NAC, thus making the RAC suitable for transportation construction. The findings in development of damage detection and health monitoring techniques using embedded smart cement modules resulted from this study promote the widespread application of recycled concrete in transportation construction and provide viable and effective health monitoring techniques for concrete structures in general.
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Details
- Title
- Material property assessment and crack identification of recycled concrete with embedded smart cement modules
- Creators
- Pizhong Qiao - Washington State Univ. (United States)Wei Fan - Washington State Univ. (United States)Fangliang Chen - Washington State Univ. (United States)
- Publication Details
- Proceedings of SPIE, Vol.7981(1), pp.79814V-79814V-13
- Conference
- Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900547041201842
- Language
- English
- Resource Type
- Conference proceeding