Abstract
The paper presents the test results of lime mortar compressive strength in the joints of brick walls. The tests were carried out with the Double Punch Test (DPT) method and with the use of an impact penetrometer (penetrometric test PT) on original samples taken from the structure of a building erected in the 1880s. The obtained results have shown that the predictions of the mortar compressive strength using both methods were very consistent (the difference 6%). The penetrometric method also made it possible to assess the homogeneity of the mortar in the direction of the wall thickness.
Highlights
The most reliable methods of assessing the masonry compressive strength are destructive tests carried out on masonry samples cut out from the existing structure
The penetrometric method presented in this article is used for mortars of low strength, whereas Double Punch Test (DPT) method is used for mortars of cohesion, which allows samples to be cut out of the masonry joint
The advantage of minor destructive methods is the ability to perform a large number of in-situ tests, which is crucial in statistical evaluation
Summary
The most reliable methods of assessing the masonry compressive strength are destructive tests carried out on masonry samples cut out from the existing structure. A number of minor destructive methods (MDT) have been developed to assess the mortar strength in masonry joints [2,3,4,5,6,7]. These methods are developed for medium and high strength mortars. Verification of minor destructive methods of testing mortar strength in the joints of masonry walls has been carried out mainly on samples made in the laboratory using modern materials. In order to increase the reliability of the test results, the authors of this article suggested to carry out research using 2 minor destructive methods
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