METHOD TO REPAIR CONCRETE LINING OF HYDRAULIC ENGINEERING STRUCTURES IN PROCESS OF OPERATION (VERSIONS) Russian patent published in 2011 - IPC E02B3/16 C04B28/04 

FIELD: construction.

SUBSTANCE: method of repair includes filling plastic composition into space between boards and basement through pressurised injection, which is identified from the following dependence: where P - pressure of plastic composition injection into space under boards, kPa; 0.098 - proportion ratio; k - size coefficient, kPa·cm²/g; γ_rc - volume weight of reinforced concrete boards, g/cm³; δ_o - thickness of reinforced concrete boards, cm; γ_pc - volume weight of plastic composition, g/cm³; Δ - average value of gap between reinforced concrete plate and base, cm; m - horizontal equivalent. Five versions are proposed for plastic compositions, including portland cement, quartz sand with fraction of less than 0,14 mm; superplasticiser C-3, water and possibly additive selected from the group; microsilica, condensed with specified surface (15-25)·10³ cm²/g, mineral powder for asphalt concrete and organic mineral mixtures, chrysotile asbestos and polishing dust - waste of asbestos products making, brine of leach extraction of bischofite-sulfate type with density of 1.24-1.35 t/m³.

EFFECT: improved manufacturability of method for repair of specified lining, higher impermeability to water and frost resistance of concrete mixture.

5 cl, 6 tbl, 1 ex, 2 dwg