The use of prefabricated components is expanding and one of the most used parts is the concrete tables and flooring. Prefabricated flooring manufacturing methods include conventional methods, dry compression method and more compact method. In a dry compression method, concrete with a low level of performance, with concrete slipping zero, is compact and pressurized. One of the advantages of the dry compression method is the speed of execution and exit of the piece from the mold immediately after placement and compacting, which results in the absence of a large number of molds. Also, the ratio of water to low cement in concrete used in this method will improve the quality of concrete.
Achieving the durable and durable properties of concrete components can result from various factors, including suitable materials, proper mixing and technical principles of construction, transportation, disassembly and treatment. One of the factors that influence concrete conditions is the density of prefabricated parts when mixing and placing concrete. Under constant pressure conditions, optimum moisture content has a significant effect on the quality of concrete, which increases or decreases on concrete densities. Therefore, the aim of this study was to study the moisture content of concrete on the quality of concrete floorings produced by dry compression method and also to determine the optimum moisture content which leads to the best quality of hardened concrete.