Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength
The determination of the load bearing capacity of masonry in existing structures is not an easy task, even for experienced surveyors. For its assessment, it is necessary to know the compressive strength of the masonry units and mortar. Relatively good destructive and non-destructive methods were dev...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/13/2/273 |
| _version_ | 1797621997696450560 |
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| author | Jiří Žalský Miroslav Vokáč Milan Hrabánek Karel Hurtig |
| author_facet | Jiří Žalský Miroslav Vokáč Milan Hrabánek Karel Hurtig |
| author_sort | Jiří Žalský |
| collection | DOAJ |
| description | The determination of the load bearing capacity of masonry in existing structures is not an easy task, even for experienced surveyors. For its assessment, it is necessary to know the compressive strength of the masonry units and mortar. Relatively good destructive and non-destructive methods were developed for the determination of the compressive strength of masonry units. However, mortar compressive strength determination is currently closer to a rough estimation rather than a deterministic approach. All of the currently used methods are either complicated, have a limited application, or are based on the surveyor’s experience only. Influence of the human factor on the results of testing is significant. The paper introduces the development of a new non-destructive method, which eliminates the influence of the human factor. The method is supposed to work as quickly and as easily as the Schmidt hammer used for concrete structure surveys. The new instrument was created where the compressive strength of mortar is assessed by hammering a steel bar into a joint with constant energy, while the depth of penetration is measured. The impact energy is provided by a steel spring with a prescribed stiffness, and the loading is provided by an automatic system similar to those used in air-soft guns. |
| first_indexed | 2024-03-11T09:04:07Z |
| format | Article |
| id | doaj.art-73a3950234b14850a5d98125de62da55 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-11T09:04:07Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-73a3950234b14850a5d98125de62da552023-11-16T19:30:13ZengMDPI AGBuildings2075-53092023-01-0113227310.3390/buildings13020273Development of a New Nondestructive Method for the In-Situ Determination of Mortar StrengthJiří Žalský0Miroslav Vokáč1Milan Hrabánek2Karel Hurtig3Klokner’s Institute, Czech Technical University, 160 00 Prague, Czech RepublicKlokner’s Institute, Czech Technical University, 160 00 Prague, Czech RepublicKlokner’s Institute, Czech Technical University, 160 00 Prague, Czech RepublicKlokner’s Institute, Czech Technical University, 160 00 Prague, Czech RepublicThe determination of the load bearing capacity of masonry in existing structures is not an easy task, even for experienced surveyors. For its assessment, it is necessary to know the compressive strength of the masonry units and mortar. Relatively good destructive and non-destructive methods were developed for the determination of the compressive strength of masonry units. However, mortar compressive strength determination is currently closer to a rough estimation rather than a deterministic approach. All of the currently used methods are either complicated, have a limited application, or are based on the surveyor’s experience only. Influence of the human factor on the results of testing is significant. The paper introduces the development of a new non-destructive method, which eliminates the influence of the human factor. The method is supposed to work as quickly and as easily as the Schmidt hammer used for concrete structure surveys. The new instrument was created where the compressive strength of mortar is assessed by hammering a steel bar into a joint with constant energy, while the depth of penetration is measured. The impact energy is provided by a steel spring with a prescribed stiffness, and the loading is provided by an automatic system similar to those used in air-soft guns.https://www.mdpi.com/2075-5309/13/2/273mortarnon-destructive testing (NDT)indenterin-situmasonrycompressive strength |
| spellingShingle | Jiří Žalský Miroslav Vokáč Milan Hrabánek Karel Hurtig Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength Buildings mortar non-destructive testing (NDT) indenter in-situ masonry compressive strength |
| title | Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength |
| title_full | Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength |
| title_fullStr | Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength |
| title_full_unstemmed | Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength |
| title_short | Development of a New Nondestructive Method for the In-Situ Determination of Mortar Strength |
| title_sort | development of a new nondestructive method for the in situ determination of mortar strength |
| topic | mortar non-destructive testing (NDT) indenter in-situ masonry compressive strength |
| url | https://www.mdpi.com/2075-5309/13/2/273 |
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