SEALING MIXTURE FOR WATERPROOFING AND CONCRETING TUNNEL LININGS Russian patent published in 2010 - IPC C04B28/04 E21D11/10 C04B41/50 C04B111/20 C04B111/27 

FIELD: construction.

SUBSTANCE: invention can be used namely for ensuring tightness of joints in reinforced concrete tunnel blocks routed in conditions of non-aggressive ground water, as well as for performing waterproofing. Mixture for waterproofing and concreting tunnel linings includes portland cement without any additions with activity of not less than 25.0 MPa in 1 day, expanding sulfoaluminate component- mixture CaO:Al₂O₃:SO₃ at molar ratio (3.1-3.5):(0.9-1.2):(2.2-2.6), fine cellulose fibre with fibres 0.03-1.0 mm long, copolymer of vinyl acetate and vinyl versatate, tartaric acid or its soluble salts and quartz sand with particle size of 0.1-2.5 mm, at the following component ratio, wt %: the above portland cement 45-50, mixture CaO:Al₂O₃:SO₃ 2.5-3.5, tartaric acid or its soluble salts 0.010-0.025, copolymer 0.2-0.5, cellulose fibre 0.1-0.2, quartz sand - the rest.

EFFECT: simplifying and reducing the process durability, increasing initial strength of concreting material obtained from mixture, increasing thixotropy of mixture and preventing it from being slipped from ceiling and vertical surfaces, improving its sanitary characteristics.

7 ex, 1 tbl