FIELD: chemistry.
SUBSTANCE: invention relates to construction materials, specifically to modifying additives for producing high-strength mortar and composite gypsum concrete, used in construction of residential and public buildings. The additive contains 30% solution of polycarboxylate Sika ViscoCrete 225P, 30% solution of polycarboxylate Glenium Ace 30 or Ace 430; solution of anti-foaming agent Degressal SD-21, 5% carbamide solution, 10% sodium gluconate solution and 5% solution of re-dispersible copolymer substance Neolith - P 3300, with the following ratio of components, wt %: Sika ViscoCrete 225P solution - 20.0-28.0; Glenium Ace 30 or 430 solution - 23.0-25.0; anti-foaming agent Degressal SD-21 - 0.08-0.15; carbamide solution - 20.5-22.4; sodium gluconate solution- 14.0-16.0; Neolith-P 3300 solution - 14.42-16.45, obtained by mixing components until complete homogenisation of the obtained additive solution.
EFFECT: high strength and water-resistance of the obtained materials.
2 tbl, 9 ex
