STACK Russian patent published in 2011 - IPC E04H12/28 

FIELD: construction.

SUBSTANCE: stack comprises a bearing shaft and gas escape shafts. At the same time it comprises a shell that strengthens the bearing shaft in the form of a confusor, which is tightly adjacent to the inner surface of the bearing shaft and rests against the foundation, at the same time the shell is made of prestressed reinforcement and a matrix made as monolithic by gunning method, where the coefficient of matrix material steam permeability is by five and more percent lower than in material of the bearing shaft, and compression strength of the shell matrix material is more than by ten percent higher than the strength of the bearing shaft material.

EFFECT: strengthening of breaking conical brick and reinforced concrete stacks by increasing strength of the bearing shaft due to its increased strength, chemical, abrasive and temperature resistance.

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