ABSTRACT
This chapter presents the results of tests and analysis of the behaviour of small masonry wallettes made of autoclaved aerated concrete (AAC) blocks with thin joints and unfilled head joints, subjected to diagonal compression. In many countries the AAC has become one of the most popular materials used in construction of small dwelling houses as well as multi-apartment residential buildings. It is also very popular to use AAC as masonry infill of frame or slab-column structures. The appearance of cracks in the strengthened wallettes does not signify failure because the increase of deformation is accompanied by gradual involvement of external reinforcement (GFRP). According to the testing scope some of the tested walls' surfaces were strengthened using two orientations of GFRP strips: vertical and diagonal. GFRP strips allowed for very large deformations of the structure at failure. GFRP strips with the width of 200 mm were glued with the resin epoxy glue.
