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Vol. 109, Issue 10, October 2009, pp. 96-104

 

Bullet

 

Low-Cost Wireless Nanotube Composite Sensor for Damage Detection of Civil Infrastructure

 

1Mohamed SAAFI, 2Lanouar KAABI

1Department of Construction Engineering and Management

North Dakota State University, Fargo, ND 58108, USA

2Laboratoire Matériaux, Measures et Applications, Institut National des Sciences Appliquées

et de Technologies, BP 676 Cédex 1080, Tunis Cedex, Tunisia

Tel.: 1-703-231-9505

E-mail: Mohamed.saafi@ndsu.edu

 

 

Received: 10 August 2009   /Accepted:  24 November 2009   /Published:  30 November 2009

 

Abstract: This paper presents a new low-cost wireless nanotube composite sensor for structural damage detection. A cement matrix with networked carbon nanotubes was used to develop an in situ, wireless and embedded sensor for crack detection in concrete structures. By wirelessly measuring the change in the electrical resistance of the carbon nanotube networks, the progress of damage can be detected and monitored wirelessly. As a proof of concept, the wireless cement-carbon nanotube sensors were embedded into concrete beams and subjected to monotonic loading to evaluate the effect of damage on their response. Results indicated that the wireless response of the embedded nanotube sensors were able to detect the initiation of damage at an early stage of loading.

 

Keywords: Nanotube sensor, Wireless monitoring, Damage detection, Civil infrastructure

 

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