Currently, materials made of cellular concrete are increasingly used in construction. The strength of the cellular blocks depend on their densities. According to the test results, the dependence of the strength of aerated concrete samples on their density was obtained. However, if we reinforce the aerated concrete blocks with fiber, we will get very different values. When reinforcing cellular concrete with fibrillated fiber, the dependence of strength on density varies – the strength of the samples increases 1.8 – 2.4 times, compared with the strength of non-reinforced samples at a constant density. This means that when fiber is included in cellular concrete, blocks of such low grades as D300 - D400 can be used for the construction of load-bearing walls in low-rise construction

Keywords: cellular concrete, aerated concrete, density, strength, reinforcement, fiber, thermal insulation, bearing wall, enclosing structure