Conference proceeding
Highly nonlinear solitary waves-based sensor for monitoring concrete
Proceedings of SPIE, Vol.7981(1), pp.79812L-79812L-9
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
04/21/2011
Handle:
https://hdl.handle.net/2376/112958
Abstract
This paper describes the application of a novel actuator/sensor technology for monitoring concrete at early age. A
device is designed to generate and detect highly nonlinear solitary waves (HNSWs) in a chain of steel beads. Two
experiments were conducted. In the first experiment, the propagation of the HNSWs in the chain was recorded. In
particular, the reflections at the interface between the chain and a composite layer consisting of a thin aluminum
plate and the concrete were observed. It was found that the travelling time of HNSWs of the reflected pulses depend
on the boundary conditions of the chain, so it changes as the stiffness and strength of concrete develop during the
hydration process. In the second experiment, a similar actuator was used to transmit mechanical waves inside
concrete. These waves were then detected by an embedded commercial transducer. The change of frequency
components of the stress waves in the fresh concrete was monitored and used to interpret the initial set of the
concrete.
The results of these two experiments were compared to outcomes of the penetration resistance test (ASTM C403)
conventionally used to determine the time of setting. We found that the proposed nondestructive evaluation method
can be used in fresh concrete although more tests are needed to prove repeatability under various concrete mixtures.
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Details
- Title
- Highly nonlinear solitary waves-based sensor for monitoring concrete
- Creators
- Xianglei Ni - Univ. of Pittsburgh (United States)Somayeh Nassiri - Univ. of Pittsburgh (United States)Piervincenzo Rizzo - Univ. of Pittsburgh (United States)Julie Vandenbossche - Univ. of Pittsburgh (United States)
- Publication Details
- Proceedings of SPIE, Vol.7981(1), pp.79812L-79812L-9
- Conference
- Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900548329601842
- Language
- English
- Resource Type
- Conference proceeding