CONCRETE MIX Russian patent published in 2014 - IPC C04B28/04 C04B111/20 

FIELD: construction.

SUBSTANCE: concrete mix includes Portland cement, crushed stone with particle size of 5-10, sand, water, a complex expansion agent containing alumina cement and crushed gypsum stone. Additionally, the complex expansion agent includes Glenium-51 superplasticising agent and aluminium powder at the following component ratio, wt %: Portland cement 17-21, granite macadam with particle size of 5-10 mm 31-33, sand of two fractions with particle size of 0.16-0.63 mm and 1.25-5 mm with fineness modulus of 2.7 31-37, complex expansion agent 3.3-6.6, and water is the rest. The complex expansion agent contains the following components, wt %: alumina cement with Al₂O₃ content of at least 35 wt % 69-72, crushed gypsum stone with SO₃ content of at least 42 wt % 22-24, Glenium-51 superplasticising agent 3.2-7.9, and aluminium powder 0.8-1.1.

EFFECT: providing reliable contact of hardening concrete with surface of concreted space and compensation of shrinking deformations, which provides density and non-permeability of a contact-butt zone.

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