Precast-monolithic beam reinforced concrete floors with aerated concrete blocks

This study presents the design, analysis, and structural performance assessment of precast-monolithic beam reinforced concrete floors incorporating aerated concrete blocks, developed for the hot and dry climatic conditions of Uzbekistan. The main objective is to determine the bearing capacity and deflection behavior of these composite floors using the limit equilibrium method, accounting for different span lengths and load combinations in accordance with SP 20.13330.2016 “Loads and Impacts.” Six design configurations were analyzed for spans ranging from 3 m to 6 m under twelve load combinations. The results show that the moment capacity obtained from the limit equilibrium method is 1.5-1.8 times higher than that computed by the traditional sectional method, demonstrating improved structural efficiency and material economy. Experimental verification was conducted on a prototype slab constructed at the Department of Building Structures, Fergana Polytechnic Institute. The study confirms that using aerated concrete blocks as permanent formwork and fillers not only reduces weight but also enhances construction speed and energy efficiency. The developed system is recommended for low-rise residential and public buildings requiring lightness, seismic resistance, and cost-effectiveness.