Aerated concrete block D390, O-shaped B2.5 F250mm - 350 x 250 x 550mm

YTONG block with factory-shaped opening, designed for frameless casting of reinforced concrete columns and vertical belts. The blocks, built one above the other, form a cylindrical hole. The reinforcement is placed in it and the concrete is poured, without the need to make any formwork. This saves time, labor and materials, achieves high accuracy when casting the column. The possibility of displacement or yielding of the formwork is avoided, whereby after the stripping it is necessary to scrape out the hardened concrete solution protruding outside the plane of the wall, as well as to correct the irregularities by filling and leveling them with plaster.