In situ measurement of conductivity and temperature during concrete curing using passive wireless sensors

Andringa, Matthew M.; Puryear, John M.; Neikirk, Dean P.; Wood, Sharon L.

doi:10.1117/12.715182

Cited by 10 publications

(8 citation statements)

References 10 publications

(10 reference statements)

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“…It s necessary to take into consideration the processing and presentation of the data together with the durability of the sensor itself. Nowadays, embedded sensors are used to measure the following parameters: chloride content [75,78,86,95], pH [106,107], moisture [108,109], i corr [46,73,80,81,88], temperature [93,108,110], potential [89,91], ρ [43,[111][112][113], oxygen transport [72,78] and i gal [82,90].…”

Section: Corrosion Assessment With Electrochemical Sensorsmentioning

confidence: 99%

Electrochemical Sensors for Monitoring the Corrosion Conditions of Reinforced Concrete Structures: A Review

Figueira¹

2017

Applied Sciences

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Several methods for corrosion monitoring of reinforced concrete structures (RCS) have been proposed in the last few decades. These systems may be used either in new, existing or repaired structures. The corrosion monitoring can be performed by different methodologies. These may or may not be destructive, use different degrees of complexity and cost, and provide information on the progression and kinetics of the corrosion phenomena. The destructive methods are limited to sampling. Therefore, these may not be representative of the whole structure, which is extremely important in RCS with large heterogeneities both in terms of materials used and in terms of the exposure environment. Within this context, non-destructive methods have been widely developed, which are intended to provide quick information about the entire structure. Ideally, these systems should be able to detect the corrosion state of the steel inside the concrete, the main causes of corrosion and the evolution of corrosion phenomena over time. This manuscript reviews and summarizes the actual state of the art and the main achievements in the field of electrochemical sensors based on non-destructive methods for corrosion monitoring of RCS in the last few years. The challenges and perspectives in this field will also be discussed.

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Section: Corrosion Assessment With Electrochemical Sensorsmentioning

confidence: 99%

Electrochemical Sensors for Monitoring the Corrosion Conditions of Reinforced Concrete Structures: A Review

Figueira¹

2017

Applied Sciences

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“…The resonant frequency is identified by a minimum in the phase angle and the phase depth is defined as the difference between the phase angle at and away from the resonant frequency. Because the depth of the phase dip strongly depends on the coupling factor between the reader and the sensor, which is a function of the clear separation distance (Figure 1), a non-dimensional term, pseudo quality factor, is used to define the sensor performance [4][5][6][7]. The pseudo quality factor is independent of the coupling factor and is calculated as f 0 / Δf, where f 0 is the resonant frequency and Δf is the width of the phase response.…”

Section: Conductivity Sensorsmentioning

confidence: 99%

“…The first generation conductivity sensor [4,5] has two, parallel electrodes that are physically wired to the resonant circuit within the sensor. The electrodes are exposed to the environmental conditions within the surrounding medium ( Figure 4).…”

Section: Conductivity Sensors With the Exposed Electrodesmentioning

confidence: 99%

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Enhanced resolution of passive wireless conductivity sensors

et al. 2012

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A passive, wireless sensor has been developed at the University of Texas at Austin to monitor the insitu conductivity of concrete within civil infrastructure systems. Electrical conductivity is one possible indicator of corrosion of embedded reinforcement and thereby provides information on structural performance. The sensors would be attached to the reinforcement cages before placement of the concrete and interrogated as part of a routine inspection over the service life. A new sensor design, a non-contact conductivity sensor, is being developed to minimize the likelihood of damage to the sensor during placement of the concrete; a metal element is positioned above the sensor body but is not connected to the resonant circuit within the sensor. In order to verify the response of the non-contact conductivity sensors, they were submerged in liquids of increasing conductivity. Analysis of the measured data demonstrated that the noncontact conductivity sensors successfully detected conductivity variations in liquids.

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“…Technological advances in recent decades have also influenced the development of corrosion sensors. Among the most important proposals are fiber optic sensors [ 21 , 22 ], which stand out for their versatility and miniaturization capability; and sensors based on inductively coupled magnetic fields [ 23 , 24 ], which allow wireless monitoring. In addition, emerging damage identification techniques based on acoustic emission [ 25 ] and guided ultrasonic waves [ 26 ] have proved effective in damage identification in reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

An Embedded-Sensor Approach for Concrete Resistivity Measurement in On-Site Corrosion Monitoring: Cell Constants Determination

Ramón

Martínez

Gandía-Romero

et al. 2021

Sensors

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The concrete electrical resistivity is a prominent parameter in structural health monitoring, since, along with corrosion potential, it provides relevant qualitative diagnosis of the reinforcement corrosion. This study proposes a simple expression to reliable determine resistivity from the concrete electrical resistance (RE) provided by the corrosion sensor of the Integrated Network of Sensors for Smart Corrosion Monitoring (INESSCOM) we have developed. The novelty here is that distinct from common resistivity sensors, the cell constants obtained by the proposed expression are intended to be valid for any sensor implementation scenario. This was ensured by studying most significant geometrical features of the sensor in a wide set of calibration solutions. This embedded-sensor approach is intended to be applicable for RE measurements obtained both using potential step voltammetry (PSV, used in the INESSCOM sensor for corrosion rate measurement) and alternating current methods. In this regard, we present a simple protocol to reliably determine RE, and therefore resistivity, from PSV measurements. It consists in adding a very short potentiostatic pulse to the original technique. In this way, we are able to easy monitor resistivity along with corrosion rate through a single sensor, an advantage which is not usual in structural health monitoring.

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In situ measurement of conductivity and temperature during concrete curing using passive wireless sensors

Cited by 10 publications

References 10 publications

Electrochemical Sensors for Monitoring the Corrosion Conditions of Reinforced Concrete Structures: A Review

Electrochemical Sensors for Monitoring the Corrosion Conditions of Reinforced Concrete Structures: A Review

Enhanced resolution of passive wireless conductivity sensors

An Embedded-Sensor Approach for Concrete Resistivity Measurement in On-Site Corrosion Monitoring: Cell Constants Determination

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