SU1004295A1 - Concrete mix - Google Patents

Description

(54) CONCRETE MIXTURE

The invention relates to the arbitrariness of building materials, namely the preparation of concrete mixtures with modifying additives.

. A concrete mix is known that includes cement, aggregate, water, and epoxy resin in an amount of 6.8-12% by weight of cement C

Closest to the invention of the technical essence and the achieved result is a concrete mix 2, comprising in wt.%:

Cement

Portland cement)

8.5-24.5

26-34

Sand 41-50

Rubble

Epoxidized Alkyl Resor 0 0004-0,0074

cinova resin

Hydroxide

alkaline

0.0003-0, metal qi4 0.003-0.0074

Methylformamide 0.0006-0,0003

Sulfuric acid WaterErest

A disadvantage of the known solutions is the relatively low mobility of the concrete mix.

The aim of the invention is to increase the mobility of the concrete mix.

The goal is achieved by the fact that the concrete mixture, including Portland cement, sand, crushed stone, epoxy resin, alkali metal hydroxide and water, contains aliphatic epoxy resin, and additionally nitromethane in the following ratio of components, wt.%:

8.5-24.5

Portland cement

ten

Sand 26-34

41-50

Shcheben

Aliphatic

epoxy

resin

0,0063-0,07423

15

Hydroxide

0,00094-0,049

alkali metal

Nitromethane 0.00126-0.049

Water Rest

The proposed concrete mix is prepared in 20 tons by mixing cement, sand, rubble, additives, and water.

The additive is prepared as follows.

25

DEE-1 or TEG-1 epoxy resin, nitromethane and water are mixed, and then the alkali metal HYDROXIDE is added with stirring until the intense heat release 30 is stopped or during the reaction. At the same time,

components are taken in the following ratio, ma.ch .;

Epoxy

resin1

Nitromethane0,2-1

Water1,5-5

Hydroxide

alkaline.

metal 0,15-1

As a result of the reaction, nitron metinification of resin molecules occurs with the opening of epoxycycles and the formation of fragments of substituted 1-nitron3-ols, which can be effectively adsorbed on the hydrolyzed surface of cement particles, the screen of the strength of the interaction between them, which increases the mobility of the concrete mix. nitro alcohol several, reduces the surface tension of water, which contributes to the involvement of finely dispersed air bubbles into the concrete mixture and increases the frost resistance of hardened tones.

The resulting additive — nitron-methinated epoxy resin in an amount of 0.1–0.6% by weight of cement (in. Calculated on the dry matter) is introduced into the concrete mix with a mixture of mixing water. Water added to the concrete mix is subtracted from the total amount of mixing water.

The resulting concrete mixes are tested according to GOST 10181-76 to determine mobility. Then cubic specimens are made with a 10 cm rib for compressive strength testing. Comparative physico-mechanical properties of concrete samples prepared from the proposed and known concrete mixtures are given in table. 1 and 2.

Claims (2)

SUMMARY OF THE INVENTION A concrete mixture comprising a port of “land cement, sand, crushed stone, epoxy” resin, hydroxide · alkali metal and water, revealing that, in order to increase the mobility of concrete mixes while maintaining the strength of concrete, it contains an aliphatic epoxy resin VNIIPI Order 1782/26 0.0063-0.07423 0,00094-0,049 0.00126-0.049 Other information, • th additional nitromethane in the following ratio of components, Portland cement Sand Crushed stone Aliphatic epoxy resin Hydroxide. alkali metal Nitromethane Water Sources taken into account during the examination 1. Chekhovsky Yu.V. Decrease in permeability of concrete. M., Energy, 1968, p. 95. 2. USSR copyright certificate on application 'No. 2943486 / 29-33, cl. C 04 V 13/24, 1981. Circulation 620 Subscription Branch of PPP Patent, Uzhgorod, Project 4,