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Title:

Development of Electrical Conductivity-Based Sensors for Health Monitoring of Concrete Materials
Cover of Development of Electrical Conductivity-Based Sensors for Health Monitoring of Concrete Materials

Accession Number:

01045576

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

While several structural health monitoring methods are available for assessing the applied loads, displacements, stresses, and strains in a concrete structure, very few techniques are available to enable condition assessment from a material durability viewpoint. In order to evaluate the durability performance of concrete, insitu measurements must provide information on the microstructure and internal chemistry of the material. This paper describes the development of a material sensing and health monitoring system that is designed to measure several material properties that are necessary for evaluation of the durability performance of concrete. This sensing system is composed of three electrical conductivity-based sensors and a temperature sensor. The electrical sensors include a concrete conductivity (ót) sensor (that monitors setting and hardening of concrete and measures microstructural and transport properties of the material), a pore solution conductivity (óo) sensor (that monitors changes in the internal chemistry of the system due to ion penetration or carbonation), and a conductivity-based relative humidity (RH) sensor (to monitor moisture transport and shrinkage of the material). The temperature (T) sensor enables determination of the rate of hydration and strength development of concrete while it provides information needed for temperature calibration of the electrical sensors. This paper presents an introduction to this sensing system and discusses the role of each sensor in material health monitoring of concrete. Specifically, the measurements of the concrete conductivity (ót) sensor are analyzed in detail.

Monograph Accession #:

01042056

Report/Paper Numbers:

07-1765

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Rajabipour, Farshad
Sant, Gaurav
Weiss, William Jason

Pagination:

16p

Publication Date:

2007

Conference:

Transportation Research Board 86th Annual Meeting

Location: Washington DC, United States
Date: 2007-1-21 to 2007-1-25
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures; Photos; References (28)

Uncontrolled Terms:

Relative humidity

Subject Areas:

Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2007 Paper #07-1765

Files:

PRP, TRIS, TRB

Created Date:

Feb 8 2007 6:26PM