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Materials and Structures

, 51:170 | Cite as

Electrical characterization of smart sensory system using carbon based textile reinforced concrete for leakage detection

  • Yiska Goldfeld
  • Gali Perry
Original Article
  • 36 Downloads

Abstract

The study investigates the electrical mechanism of hybrid carbon-based textile-reinforced concrete (TRC) elements with self-sensing capabilities to detect infiltration of water within cracked zones. The concept is based on carbon rovings that simultaneously serve as the reinforcement system as well as the sensory agent. The main goal of the study is to characterize the mechanism of the electrical signal obtained by exposure carbon rovings to wetting events. To meet this goal, the study uses alternating current circuits, which yield, additionally to the resistance or voltage changes, the characterization of the capacitance and inductance of the system. Two sensing concepts are investigated. Both concepts take advantage of the continuous configuration of the carbon rovings, which enables direct connection of the roving ends to the data acquisition system. The first sensing concept assumes that the electrical properties of a single carbon roving is affected by wetting, while the second assumes that wetting the interface between two adjacent carbon rovings links them electrically. The experimental investigation is performed on bare carbon rovings, and on a cracked carbon based TRC beam. Test results characterize the electrical mechanism of the wetting events and reveal its potential use as a basis for smart textile-reinforced systems with integrated monitoring functions.

Keywords

Textile-reinforced concrete (TRC) Carbon rovings Sensing Wetting and infiltration detection AC circuit 

Notes

Acknowledgements

The authors acknowledge the support provided to this study by the American Technion Society within the framework of the Interdisciplinary Eco-Engineering Research Center: Philip and Harriet Klein Contribution. The authors also acknowledge the support provided to this study by the BMBF—MOST Joint German-Israeli Water Technology Research Program, Grant No. WT1602/02WIL1452. The paper conducted at the Technion with the assistance of Eng. Barak Ofir, Mr. Elhanan Yitzhak, and the staff of the National Building Research Institute. We gratefully acknowledge our partners at the Institute for Textile Technology (ITA) at RWTH Aachen University, Germany, under the leadership of Prof. Thomas Gries, for supporting us with the textile production.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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Copyright information

© RILEM 2018

Authors and Affiliations

  1. 1.Faculty of Civil and Environmental EngineeringTechnion – Israel Institute of TechnologyHaifaIsrael

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