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Stress state laboratory verification in masonry structures according to the flat jack method

Łątka D.

Technical Transactions

2017

Vol. 2(114)

119--128

In the article, the value of compressive stress defined according to the flat jack method with a theoretical value of the stress was compared. The test was performed in a laboratory using part of the 38 cm thick masonry wall according to the procedure described in the A STM C1196 – 14a Standard. Significant correspondence between the obtained results confirms that this diagnostic method is useful in Polish conditions as well as it allows one to estimate approximately how accurate it is.

W artykule dokonano porównania wartości naprężenia ściskającego określonego według metody flat jack z wartością teoretyczną tego naprężenia. Test wykonano w laboratorium na fragmencie ściany murowej o grubości 38 cm według procedury opisanej w normie ASTM C1196 – 14a. Uzyskana duża zgodność wyników potwierdza przydatność metody diagnostycznej w warunkach polskich, jak również pozwala na orientacyjne oszacowanie jej dokładności.

Non-destructive and semi-destructive diagnostics of concrete structures in assessment of their durability

Hoła J., Bień J., Sadowski Ł., Schabowicz K.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2015

Vol. 63, nr 1

87--96

This paper proposes a comprehensive classification of test methods for the diagnosis of concrete structures. The main focus is on the ranges of suitability of the particular methods and techniques for assessing the durability of structures, depending on the principal degradation mechanisms and their effects on this durability. The survey covers non-destructive testing (NDT) methods, which do not in any way breach the integrity of the tested structures, and semi-destructive testing (SDT) methods requiring material samples to be taken or any other minor breach of structural integrity. An original taxonomy of physical, chemical and biological diagnostic methods, useful in assessment of concrete structures durability, is proposed. Equipment specific for selected advanced testing methods is presented as well as exemplary test results.