CONCRETE COMPOSITION (VERSIONS) Russian patent published in 2009 - IPC C04B28/04 C09K8/467 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to composition of concrete mixtures and can be used in hydrotecnological, meliorative, industrial-civil and transport construction, mainly in technologies of production of construction concretes, gunites and cementation - grouting mortars. Concrete composition for production of construction materials, gunites and cementation works contains, wt %: Portland cement 24.0-25.0, microsilica condensed with specific surface (15-25)·10³ cm²/g 4.0-5.5, quartz sand with fraction less than 0.14 mm 20.0-21.0, quartz sand with fraction 1.25-2.50 mm 28.0-31.0, superplastifier C-3 0.4-0.8, ground quartz sand with specific surface (3.5-4.0)·10³ cm²/g 6.5-8.0, complex additive - product of combined intensive dry breaking till specific surface is (4.0-4.5)·10³ cm²/g of clinker aluminate cement of mark "500" or "600" with part of tricalcium aluminate C₃A 8-12%, quartz sand with specific surface (1.5-2.5)·10³ cm²/g and dry powder of superplastifier C-3, with ratio 5:4:1, respectively, 2.5-3.0, reinforcing component - chrysolite asbestos 0.6-1.6, sanding dust - waste of asbestos-technical products production 0.6-1.6. In version II concrete mixture contains quartz sand of fraction 2-5.5 mm, in version III - of fractions 1.25-2.5 mm and 2 -5 mm, in version IV - of fraction 1.25-2.5 mm, in version V - of fraction less than 0.4 mm.

EFFECT: increase of flexural strength.

5 cl, 2 tbl