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The paper describes the results of testing autoclaved aerated concert walls on a natural scale.Walls were made of 18 cm wide blocks and thin layer joints. Tests on confined and unconfined walls with filled and unfilled perpend joints were made. The load-bearing capacity and deformability of walls were analyzed. K E Y W O R D S AAC masonry, compression tests, confined masonry, tests on a natural scale 1 GENERAL According to Eurocode 6 [1], confined masonry is masonry provided with reinforced concrete or reinforced masonry confining elements in the vertical and horizontal direction. Many papers [2-6] emphasize differences between confined masonry and masonry used for infill of the framed structure, and present numerous advantages of confined masonry. These papers focus mainly on the impact of confinement during periodic loading. However, Eurocode [6] only refers to masonry under static loading, and a new draft of this standard also includes

This paper presents the test results of reinforced precast lintels made of autoclaved aerated concrete (AAC) used to cover window openings in walls made of AAC masonry units. Walls were confined with reinforced lightweight concrete. The two variants of wall confinement with different way of lintel support and the static diagram of a simply supported beam and a constrained beam were tested. Cracks and deformations of test models around window openings were recorded with the Aramis software for non-contact measurements of displacements. Failure of lintels caused the loss of load capacity of test models. Lintels were cracked in the same way, but the sequence of crack formation and their location were different. The test results were compared with the test made for similar walls confined with ordinary concrete. Additional tie-columns did not significantly affected the load capacity of the test models contrary to the walls confined with ordinary concrete.

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