SU581115A1 - Concrete mix and method of preparing same - Google Patents

Description

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BACKGROUND OF THE INVENTION The invention relates to bead mixes containing additives.

A concrete mixture is known that contains a mineral in a perch, aggregates, water; and polymer additives Ell.

The closest to the technical material and achievable result is a concrete mix of cement, fine and coarse aggregate, water with the addition of aliphatic epoxy resin 23. With the introduction of an additive, epoxy resin DEG-1 increases with the degree of water resistance, as well as the deformability of concrete.

A disadvantage of the known additives is that they do not prevent the corrosion of the armature and do not sufficiently increase the durability of the concrete under the conditions of exposure to aggressive media.

The aim of the present invention is to increase the strength, water resistance, aggressiveness of concrete and the prevention of corrosion of reinforcement.

This is achieved by the fact that a concrete mix comprising cement, fine and coarse aggregate, an additive of epoxy resin and water,

additionally contains a salt of nitrous KIO | LOTA in the following ratio of components, weight. %:

Cement 8-23

Small filler 22-36 Coarse aggregate 39-50 Epoxy resin 0.02-0.46 Salt of nitrous acid O, 005-1.1S, WaterOther Dp of concrete mixture replenishing pepper by mixing cement, zapapnitep, water and tsifipi-tripetipngikopikopevoy epoxy resin pre-quartz paste are boiled down and then treated with a nitrous acid salt. Equivalent to salt; resin is not less than O, 25: 1, before p it is te ln about 1: 1.

When mixed with water, di- and tri-ethylene glycol epoxy resins form a stable emulsion, which is destroyed when the salts of the nitrogenous compound are treated to form a solution.

As a result of adsorption, the products of treating the resins with nitrites form around the cement arenes films on the surface

vnogo matter that reduces the force of your mind between particles. As a result, the mobility of cement cement and cement mixtures is recorded, and this makes it possible to reduce the water-to-water ratio, to increase the efficiency and density of the concrete.

Products of water treatment of resins | trigues are well soluble in water. Therefore, by pumping water into concrete, they will drastically increase the water resistance of JeTOHa. In addition, nitrous acid spikes are ipMi corrosion inhibitors. However, using them instead of current 1PCHTs. About polyvalentine amine improves the effect of labor.

To obtain a concrete mix using the proposed method, three mixtures were prepared (Chemicals, containing, wt.%:

I

Cement8.017.25 23.5

Sand

Shcheben

Epoxy

0.173 0.48

smopa0,2

Nitrogen salt

: sour

Water

The concrete preparation technology is as follows. Prepare an aqueous solution of resin with salt. For this, the resin is dissolved in an arbitrary amount of water (preferably 80 g or less resin per 1 liter of water), then nitrous acid salt is added to the solution, depending on the amount of tamper in the salt: resin: weight ratio. More salt is added either to speed up the resin treatment process or to increase the inhibitory effect in concrete. The processing time of the resin is 3-15 days. After that, the additive is ready for use in concrete.

The product of water treatment of the resin with a salt of nitrous acid. The required quantity (calculated on the dry matter) serves 9 concrete mixer together with water shut. Reni and knead with d ughm composed of concrete. The water added with the additive should be subtracted from the total-amount of water from the amp &

Prismatic strength, kgf / cm Mobility of the concrete mix, OK, see Boa impermeability, adi Compressive strength after 250 frost resistance test cycles, in a 10% solution of KS E kg / cm Corrosion of the reinforcement after a 40 oat growth cycle in a 1O% solution A) DAC in drying kg / m

Claims (3)

1.Sizov VN Technologists of concrete and reinforced concrete products, M., Higher School, 1972, p. 18. 2. USSR author's certificate No. 184691, cl. From 04 To 13/24, 1966, 3. Blanke 3. R. in others. Technology of cement and concrete. M., Promstroyizdat, 1957, p. 184.