The increased humidity of the sand (8-9% by weight) is explained by the fact that on Kuibyshevhydrostroy the sand is washed in summer with the use of hydromechanization from the Volga channel and put into stacks. At the same time, sand often does not have time to dehydrate and in winter enters the plants of the factory in the form of frozen lumps and blocks.
According to visual observations, 10-15% of the sand enters the warehouse of Kuibyshevhydrostroy in the form of frozen lumps and blocks. The volume of individual frozen blocks of sand reached 0.5 mg. Since the dimensions of the frozen blocks of sand often exceeded the holes of leaks, shutters and trays, it was necessary to or to crush the sand in the warehouse or apply mechanical fragmentation of frozen blocks to serve sands to the bunks. This problem was solved by arranging heating sites in the warehouse. At the suggestion of engineers n. WITH. Myznikova, a. IN. TV and e. AND. Axelrod is defrosting the aggregates in an open warehouse using steam locomotive registers.
The site for defrosting aggregates on this proposal was a monolithic ribbed concrete slab. Between the ribs of the slabs in grooves a width of 200 mm, steam locomotive registers were laid, consisting of steam pipes with a diameter of 4, laid under steam pipes along them. Saturated steam circulated on closed steam pipes, and compressed air circulated by perforated. The distance between the centers of steam pipes is 500 mm. Holes with a diameter of 2.5 mm at 8 holes per 1 m were drilled in a checkerboard pattern. Steam pipes were laid with a deepening from the base of the site by 3-5 cm.
The site had a small slope towards the condensate transport gallery for drainage. In parallel to the stacks of materials, a railway line is laid, according to which the aggregates enter self -unloading wagons.