Modern construction relies on the precise alignment of material properties with rigorous protocols that collectively ensure mechanical resistance, structural stability, and energy efficiency. Masonry structures are formed by bonding agent, such as mortar. The interaction between these two materials is crucial for the load-bearing capacity and mechanical resistance of the masonry. The primary objective of this thesis is to examine the influence of mortar and masonry units on the initial shear strength of masonry. The thesis presents tests on initial shear strength conducted on three types of masonry, combining two different mortars (generalpurpose lime-cement mortat and thin-layer mortar) and two different types of hollow clay units. Standardized test to determine the initial shear strength of the masonry were performd in accordance with the SIST EN 1052-3 standard. The analysis of the obtained results is presented using tables and graphs.
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