Considering the mandatory application of light concrete AAC blocks in the walls of buildings, the need for using appropriate materials and proper installation techniques to prevent additional cost during the service life of buildings is very important. In this study, first, the compressive strength of the AAC blocks were measured by testing of cubic samples with dimensions of 200 mm. The results show that the compressive strengths were between 2.4 and 3.1 MPa with an average value of 2.7 MPa. To determine elastic modulus, 5 cube samples of 100 mm dimensions were also tested under compressive loading along with axial deformation measurements. The process of acquiring block adhesive resistance by testing 28 blocks in a 100×100×200 mm dimension, which were bonded together with block adhesive, was tested under three points bending test at different curing ages from 8 hours to 35 days. Then the results were compared with 4 samples based on 100×100×400 mm. The results showed that, after 48 hours, adhesive adhesion strength exceeded the resistance of the block.