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Quantification of Humidity and Salt Detection in Historical Building Materials via Broadband Radar Measurement
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<p>For the investigation of moisture and salt content in historic masonry, destructive drilling samples followed by a gravimetric investigation is still the preferred method. In order to prevent the destructive intrusion into the building substance and to enable a large-area measurement, a nondestructive and easy-to-use measuring principle is needed. Previous systems for moisture measurement usually fail due to a strong dependence on contained salts. In this work, a ground penetrating radar (GPR) system was used to determine the frequency-dependent complex permittivity in the range between 1 and 3 GHz on salt-loaded samples of historical building materials. By choosing this frequency range, it was possible to determine the moisture in the samples independently of the salt content. In addition, it was possible to make a quantitative statement about the salt level. The applied method demonstrates that with ground penetrating radar measurements in the frequency range selected here, a salt-independent moisture determination can be carried out.</p>
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Blaschke, Oliver; Brand, Felix; Drese, Klaus Stefan (2023): Quantification of Humidity and Salt Detection in Historical Building Materials via Broadband Radar Measurement. Sensors 23 (10), S. 4616. DOI: 10.3390/s23104616
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The website of Coburg University of Applied Sciences was translated using translation software provided by a third-party provider such as DeepL. The official text is the German version of the website. No liability is assumed, either explicitly or implicitly, for the accuracy, reliability, or correctness of the translations into another language.

Quantification of Humidity and Salt Detection in Historical Building Materials via Broadband Radar Measurement

For the investigation of moisture and salt content in historic masonry, destructive drilling samples followed by a gravimetric investigation is still the preferred method. In order to prevent the destructive intrusion into the building substance and to enable a large-area measurement, a nondestructive and easy-to-use measuring principle is needed. Previous systems for moisture measurement usually fail due to a strong dependence on contained salts. In this work, a ground penetrating radar (GPR) system was used to determine the frequency-dependent complex permittivity in the range between 1 and 3 GHz on salt-loaded samples of historical building materials. By choosing this frequency range, it was possible to determine the moisture in the samples independently of the salt content. In addition, it was possible to make a quantitative statement about the salt level. The applied method demonstrates that with ground penetrating radar measurements in the frequency range selected here, a salt-independent moisture determination can be carried out.

Titel:

Quantification of Humidity and Salt Detection in Historical Building Materials via Broadband Radar Measurement

Veröffentlichungsdatum:

10.05.2023

Publikationsart:

Zeitschriftenbeiträge

Forschungsschwerpunkt:

HRK Schwerpunkt Sensorik und Analytik

Medien:

Sensors

DOI:

https://doi.org/10.3390/s23104616

Weblink:

Heft:

10

Band:

23

Artikelnummer:

ISBN:

Autoren:

Oliver Blaschke, Felix Brand, Klaus Stefan Drese

Medien:

Sensors

Herausgeber:

MDPI

Seiten:

4616

Open Access:

Peer reviewed:

Ja

Zitierung:

Blaschke, Oliver; Brand, Felix; Drese, Klaus Stefan (2023): Quantification of Humidity and Salt Detection in Historical Building Materials via Broadband Radar Measurement. Sensors 23 (10), S. 4616. DOI: 10.3390/s23104616

Autoren:

Oliver Blaschke, Felix Brand, Klaus Stefan Drese