Use of Ground Penetrating Radar measurement combined to resistivity measurement for characterization of the concrete moisture

Wutke, Małgorzata

doi:10.1109/icgpr.2018.8441577

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…1-4), tilt of 1.3mm towards the W-Z Route exit over a period of 8 years, • from -1.7 mm to + 2.2 mm in the upper retaining wall (benchmark no. [39][40][41][42][43][44][45][46], uplifts occur in the upper part of the slope and in the lower corner, • from -3.0 mm to + 2.6 mm in the lower retaining wall (benchmark no. 55, 56), monitored from 2010r.…”

Section: Discussionmentioning

confidence: 99%

“…Microwaves can propagate through the dielectric material and interact with the material to produce information about this material. Martínez-Garrido et al [33] published a comprehensive study for moisture control in cultural heritage using several non-destructive techniques, which included an Electrical Conductivity meter (EC) [34], Infrared Thermography (IRT) [35][36][37], Electrical Resistivity Tomography (ERT) [38][39][40][41] and Ground-Penetrating Radar (GPR) [42,43].…”

Section: Evaluation Of the State Of Preservation Of Wall Painting -St...mentioning

confidence: 99%

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The Example of using long-term monitoring and non-invasive measurements for Structural Health Monitoring. Cause study of St. Anna's Church in Warsaw

Górecka

Łapiński

Markiewicz

2022

Journal of Modern Technologies for Cultural Heritage Preservati

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Heritage objects are affected by many factors that affect degradation over time and damage to historical sites. For this reason, it is necessary to carry out continuous monitoring using non-invasive techniques for Structural Health Monitoring and plan the conservation works. This article aims to present the results of a project that involved long-term monitoring using surveying techniques such as precise tacheometric measurements, precise levelling, inclinometric measurements and crack measurements using crack gauges. This paper presents the results of multisensor monitoring of displacements and cracks in the building, which contributed to the conservation efforts and prevent works. A research object is St. Anne's Church in Warsaw. It is one of the few in Warsaw that wasn't destroyed during World War II.

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Section: Discussionmentioning

confidence: 99%

Section: Evaluation Of the State Of Preservation Of Wall Painting -St...mentioning

confidence: 99%

The Example of using long-term monitoring and non-invasive measurements for Structural Health Monitoring. Cause study of St. Anna's Church in Warsaw

Górecka

Łapiński

Markiewicz

2022

Journal of Modern Technologies for Cultural Heritage Preservati

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“…129 As a result, self-magnetic flux leakage (SMFL) signals can be generated around the corrosion regions of the rebar by the excitation of the earth’s magnetic field and mechanical loads. 130 For corrosion monitoring, the magnetometer is moved along the tested RC specimen at different lift-heights, and the tangential magnetic field curves corresponding to different lift-heights are measured. These curves intersect at the same points, and the distance between the intersecting points indicates the length of the corrosion region, which is used to locate the corrosion of steel rebar.…”

Section: Corrosion Sensing Based On Electromagnetic Methodsmentioning

confidence: 99%

Techniques of corrosion monitoring of steel rebar in reinforced concrete structures: A review

Fan

Shi

2021

Structural Health Monitoring

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Reinforcement corrosion is a major culprit that undermines the service life of reinforced concrete (RC) structures. It costs billions of dollars each year in the US alone and negatively impacts safety, reliability, resilience, and environmental performance of RC infrastructure. Corrosion monitoring of steel rebar is critical to provide early warning of deficiency, enable timely and effective maintenance strategies, and prevent catastrophes associated with premature failure of RC structures. To improve corrosion monitoring in the engineering practice, this work comprehensively reviews the state of the art of five major types of techniques, that is, electrochemical sensors, optical fiber sensors, sensors based on elastic wave methods, sensing based on electromagnetic methods, and untouched sensors. Each type of technique is systematically divided into sub-categories based on the sensing principle and key characteristics. For each sensor type, its maturity, application range, and the problems that hinder its application are discussed, aimed to provide guidance in selecting the appropriate sensors for specific engineering applications. This work concludes with an overview of opportunities and challenges, including the following six aspects for future research: spatial resolution, sensitivity, and measurement range; reliability and interpretation of the measurement; sensor selection based on three corrosion stages of steel rebar; long-term stability and service life; cost-efficiency of the sensing system; and monitoring of existing structure.

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“…Then an electromagnetic wave penetrates the medium where it may undergo transmission, reflection and/or refraction (resulting from a change in electrical parameter). In recorded images (radargrams), the electromagnetic waves that were reflected from the boundaries between deposits characterized by different values of their dielectric constant εr are analyzed [8][9][10][11][12][13]. The 'quality' (reflection strength, amplitude) recorded on radargrams and the depth range depends on the contrast of the electrical properties between the two media [14][15][16].…”

Section: Ground Penetrating Radar Methodsmentioning

confidence: 99%

Archives of Civil Engineering

Lejzerowicz,

Wutke

2020

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From the construction made in the "white box" technology, first of all tightness is required -on the structural elements there should not be any cracks or scratches, through which water could penetrate, which in consequence may lead to deformation of structural elements and even loosing of their load-bearing capacity.Among the methods enabling the location of weakened places in watertight concrete, the ground penetrating radar (GPR) method is effective because the local occurrence of water in the structure evokes a clear and unambiguous anomaly on the radargram. In addition, the GPR method allows you to indicate places where water flows without the necessity of excluding the object from use and interference in the construction layers. The designation of such locations will make it possible to undertake technical activities that can facilitate the takeover of water and thus ensure the desired load-bearing capacity and usability of the object. Using the GPR method, you can also designate places that have already been deformed -discontinuities or breaking. The article presents a case study of investigations that determine the causes of leakage of tunnels made in the "white box" technology in: twice within the bottom slab of the tunnel (1 GHz air-coupled and 400 MHz ground-coupled antenna) and once in the case of tunnel walls (1.6 GHz ground-coupled antenna).

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Use of Ground Penetrating Radar measurement combined to resistivity measurement for characterization of the concrete moisture

Cited by 7 publications

References 3 publications

The Example of using long-term monitoring and non-invasive measurements for Structural Health Monitoring. Cause study of St. Anna's Church in Warsaw

The Example of using long-term monitoring and non-invasive measurements for Structural Health Monitoring. Cause study of St. Anna's Church in Warsaw

Techniques of corrosion monitoring of steel rebar in reinforced concrete structures: A review

Archives of Civil Engineering

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