SU1209636A1 - Binder - Google Patents

Description

The invention relates to the production of living substances from the waste of metallurgy and can be used in the manufacture of reinforced concrete structures.

The purpose of the invention is to increase the time required for the concrete to set while retaining its strength.

The essential difference between the proposed compound and the known is the simultaneous content of sodium and pentoxide in the hyposulfite of sodium in the thick, which leads to a prolongation of the time of the setting of the gripe with its high strength. Compared to the known, scoring times increase by 2-2.5 times for the beginning, and 6-8 times for the end.

Domain granulated pshak has the following chemical composition, nos.% J SiOr 32-35; 12-l4i 2-3,5; CaO 34-35, MgO 10-11; + 3-6; Soj the rest

A reaction takes place between sodium hyposulfite and vanadium hydroxide.

5Na.jS203 + ViOs + 5Hj O- 7 () 5 + + lONaOH

Sodium Hyposulphite is: a highly spasming activator of hardening.

It contributes to the strength of the ghost.

Example. Ground blast furnace slag with specific surface

5, bone 3500-3900 is mixed with technical hyposulphite sodium with steel and technical vanadium vanadium in the ratios indicated in Table. 1. Of the resulting compounds

10 tons of specimen-beams by the known method. Samples harden under natural conditions and are steamed in a laboratory steaming chamber.

i; i

according to regime 24-8 + 2 h at 85 ° С. Image20

Natural hardening stones are tested for bending and compression after 28 sous and steamed after 1 day and 28

For the resulting formulations, the normal density of the dough and the setting time are also determined.

The test results are given in table. 2

With an increase in the amounts of pytoc si vanadi in excess of 2 wt.%, The end of skhv 25, tgogani exceeds the permissible value. With an increase in the amount of hypophyllite more than 12 wt.%, The strength of the binder decreases. When reducing the amount of vanadium pentoxide less

slag, while vanadium pentoxide did not break; 30.1 wt.% also reduced strength.

However, as can be seen from the above (equation of the reaction, the interaction of these components leads to the formation of a solvent — a complex, V ,, (5gO3). 5. Sodium oxide immediately dissolves in water to form Hydroxide. The latter is a strong activator of slag solidification. Since the processes described are rather slow, the concentration of sodium hydroxide increases slowly, which causes a slower gripping of the chewing grit. Atri is increased to 4-6% by weight in relation to the amount of slag, which provides vssokuto durability to a ghost. The presence of dissolved vanadium ions in the liquid phase causes heterogeneous crystallization of gel-like neoplasms.

It contributes to the strength of the ghost.

Example. Ground granulated slag with a specific surface of 3500-3900 is mixed with technical sodium hyposulfite with crystalline and technical vanadium vanadium in the ratios indicated in Table. 1. From the obtained compositions, bead samples were prepared by a known technique. Samples harden under natural conditions and are steamed in a laboratory steaming chamber.

i; i

according to regime 24-8 + 2 h at 85 ° С. Image20

Natural hardening stones are tested for bending and compression after 28 days, and steamed after 1 day and 28 s

For the resulting formulations, the normal thickness of the dough and the setting time are also determined.

The test results are shown in Table. 2

With increasing amounts of vanadium pyatiki si over 2 wt.%, The end of seizure is 25, and the pulp exceeds the allowable value. With an increase in the amount of hypophyllite more than 12 wt.%, The strength of the binder decreases. When reducing the amount of vanadium pentoxide less

and with a decrease in the amount of hyposulfite of less than 8 wt.%, the beginning of scaling accelerates. The specified limits of the content of the components are confirmed by a test report.

The above examples show that the use of the proposed thrasher leads to an increase in the setting time as compared with the known

while maintaining high strength hardened in the gutter. At the same time, the beginning of the scrapping is extended by 2-2.5 times, and the end - by 6-8 times. At the same time, the setting time reaches

required.

The use of a tamper will make it possible to increase the technological effectiveness of the use of slag-alkali in tandem in the production of reinforced concrete structures, as well as to improve the working conditions of the workers, since the proposed tenter does not contain corrosive components.

Editor I. Derbak

Compiled by O. Motorika

Tehred M. Nador Corrector G. Reshetnik

Order 455/30 Circulation 640

VNIIPI USSR State Committee

for inventions and discoveries 113035, -Moscow, F 35, Raushsk nab., d. 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Table 1

table 2

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Claims (1)

BINDING, including ground, granulated blast furnace slag and a slit of a carbur-containing component, characterized in that, in order to increase the setting time while maintaining strength, it contains crystalline sodium hyposulphite as an alkali-containing component and additionally vanadium pentoxide in the following ratios of components, wt. %: Crystal sodium hyposulfite Vanadium pentoxide Ground granulated blast furnace slag 8-12 1-2 Rest Q ss>