METHOD OF SHOTBLASTING SURFACES OF CONCRETE AND REINFORCED-CONCRETE STRUCTURES FOR REPAIR Russian patent published in 2012 - IPC B08B7/00 B24C1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to repair processes. It may be used for shotblasting surfaces of B5-B60-strength class concrete and reinforced concrete in repair after destructive effects of H₂SO₄ in corrosion of II kind (effects of sulfurous gases, say SO₂, sulfuric anhydride SO₃ at various temperatures and hydrogen sulphide H₂S in microbiological corrosion). In surface cleaning, shots are forced at 7 atm, consumption of shots makes 9-11 kg/m², efficiency equals 20-40 m²/h, duration of shotblasting makes 2.0-2.5 min/m², degree of cleaning is Sa 2S-3.

EFFECT: higher quality of cleaning.

1 dwg, 1 tbl