SU1073207A1 - Complex additive to concrete mix - Google Patents

Abstract

. COMPLEX ADDITIVE FOR A CONCRETE MIXTURE, including sodium sulfate to a scrubber paste, characterized in that, in order to increase the mobility of the mixture and increase the water tightness, as well as the resistance of concrete to steel reinforcement and to aggressive media, creating corrosion and types of corrosion, it also contains sodium tripolyphosphate in the following ratio of components, wt.%: sodium sulfate 46-68 Scrubbern paste 4-9 1 sodium ipolyphosphate 28-45

Description

with

Isd

vj

The invention relates to compositions of complex additives for the refinement of properties of a concrete mix.

It is known the use of polyphosphates of di-, tri-, tetra- and polyphosphates) on the hydration and hardening of Portland cement.

Polyphosphates have been found to inhibit the hardening of Portland cement. The addition of polyphosphate is introduced in an amount of 0.3% by weight of cement il,

The closest to the technical essence and the achieved result to the proposed is a complex additive for concrete mix 2, including, May, h. S

Sodium sulfate 80-100

Scrubber paste 1-2

The disadvantages of limestone solutions are the low mobility of the mixtures, as well as the relatively low impermeability and resistance of concrete to steel reinforcement, to aggressive media acting on I and II type of corrosion.

The aim of the invention is to increase the mobility of the mixture and the waterproofing, as well as the resistance of concrete to steel reinforcement and to corrosive environments that create corrosion I and 1 types.

This goal is achieved by the fact that the complex additive for concrete mix, including sodium sulfate and scrubber paste, contains additionally sodium tripolyphosphate with a low ratio of components, wt.%

sodium sulfate 46-68

Scrubber paste 4-9

Sodium tripolyphosphate 28-45

Scrubber paste synthetic detergents (SPSMS) is a waste product of synthetic detergents, it is a light-gray liquid paste with a characteristic mother-of-pearl shade and the smell of soap, characterized by the following composition, wt.%;

Active part

(alcohol soluble)

3-7 including

Alkylsulfatil

2-4

on three

Unsulphurized

1-3

compounds

8-4

Sodium polyphosphates

Soda Ash

ABOUT,. 1-0, and

Sodium metasilicate

8-10

Sodium sulfate i

 rest

Water: up to 100

Granulated sodium sulfate is used as sodium sulfate.

Granulated sodium sulfate (gene) is a white granular product with a grayish tint. The size of the granules does not exceed 3 km in diameter.

According to TU 38-10742-78 GOS has the properties given in table. one.

Table

Content of sodium sulfate, not less than%

91

88

Chloride content in terms of sodium chloride (NaCl),%, not more than

.1,6

2.0 j)

Evil

0.2

5 The content of water-insoluble residue,%,

0.5

0,5 no more

Moisture content,%, 1.0

1.0 and more

Losses during the calcinating,%, no more than 5,5

3.0

. GOS is an industrial waste in enterprises producing synthetic and medical equipment. It is obtained by evaporation from sulphate water, followed by granulation, which provides bulk material (not lumps, lumps) conveniently for use. Obtaining a powdery product (gene) instead of its solution (sulphate water formed during the production of CMC) significantly reduces transport shipping costs for this product.

The introduction of sodium sulfate significantly plasticizes the cement, cement-sand and concrete mixtures, improves their workability,

at the same time, the formation of initial structures of hydration hardening in the ghost slightly slows down, and results in a material that increases in density and impermeability in relation to the environment acting mainly on | and P kinds of corrosion, and corrosion resistance of concrete in relation to reinforcement due to the passivating effect.

The mechanism of slowing down of the setting and poorly plasticized (thinning the concrete mix is determined by the ability of polyphosphates to adsorb cements on the surface of the solid phase and block the valence necaceae by unsatisfactory conditions of the mutual attraction of particles.

Slowing down the formation of initial hydration structures. hardening in living leads to material

Rheological properties of cement compositions

increased density and impermeability and corrosion resistance with respect to organic media acting on f and O types of corrosion. Protective effects of polyphosphates

in relation to steel reinforcement, the impermeable zoocyte film is formed on the metal surface, as a result of which the critical Passivation Current decreases

The action of both chloride-containing media (NaCl) and dicarboxylic acids. Prepare cement paste of normal thickness, cement-sand fine-grained concrete mix

5 ((solution) in sopnotenii 1: 3 at V / C 0.5 / as well as light concrete mix at a ratio of 1: 1.98: 1.2. Additive is injected with mixing water in the amount of 1-2% by weight of cement.

20

The test results are presented in table. 2 H 3.

table 2

28 36 45 22 51

68 57 46 76 38

IV

No additive

Proto97 type

2-30 2-50

3-20 1-40 3-50

3-15

eleven

1-15

15

4-30

2-00

P "

but

I-H

" one

This complex additive improves the performance properties of concrete in medium-aggressive organic media acting on I and types of bark and discord.

Claims (1)

. COMPLEX ADDITIVE FOR CONCRETE MIXTURE, including sodium sulfate and scrubbing paste, characterized in that, in order to increase the mobility of the mixture and increase the water resistance, as well as the resistance of concrete to steel reinforcement and to aggressive corrosion agents, the g and th form additionally holds sodium τρι in the following with, components, May.%: Sodium sulfate Scrubber paste Sodium tripolyphosphate, I create it, and it is 46-68 4-9 28-45 1 1073207 ¹