SU1364614A1 - Active concrete mix - Google Patents

Abstract

The invention relates to the field of construction and can be used for the manufacture of concrete and reinforced concrete products. The invention is aimed at reducing the filtration ratio and improving the water resistance. Activated concrete mixture contains, mA.h: cement 1, granulated blast furnace slag 1.4-1.8, a zoloshishkov mixture with a bulk density of 1350 kg / m 2.9-3.3 and water 0.75-1. The filtration coefficient of concrete is 2.9 5 ,, concrete grade for waterproofing B8. 3 tab. (L

Description

00

a: 4;

05

one

The invention relates to the construction and can be used in the manufacture of concrete and reinforced concrete products based on Portland g and granulated blast furnace slag. The purpose of the invention is to reduce the filtration coefficient and increase the water resistance of concrete.

the concrete mix, at the same time decreases in / c, and due to the presence of the ash mixture in the ash mixture of the constituent concrete, colloidal compounds are formed, which clog the pores of the concrete and thereby increase the water resistance.

The use of ash slag

For the preparation of activated bulk density 1350 kg / m

(composition 4) leads to an increase in the testimony of concrete (composition 2).

concrete mix using Portland cement with an activity of 46 MPa, granulated blast furnace slag and ash and slag i mixture.

The chemical composition of granulated and slag and ash-slag mixture is given in Table 1,

For comparison, concrete-activated concrete mixtures are prepared on the basis of cement and also based on cement and granulated slag (according to a known method).

The compositions of the raw mixes are given in Table 2,

In compositions 1-3, 5 and 6, an ash-and-slag mixture with a bulk density of 1350 kg / m is used, and in composition 4 it is used with a bulk density of 1280 kg / m,

The mixed mixture is loaded into runners and activated for 10 minutes. By adjusting the ratio between the components, the concrete is mobilized to the same mobility after being run on runners. Three samples of 150x x150x150 mm were formed from each concrete composition to determine the filtration coefficient and three samples to 100x X100x100 mm to determine the ultimate strength in compression. After steaming, the samples are stored in normal temperature and humidity conditions and are tested at 28 days of age.

The permeability of concrete is estimated by the value of the filtration coefficient, which is determined in accordance with a known method.

The results of the experiments. Are shown in Table 3,

As can be seen from Table 3, the introduction of an ash-slag mixture into a concrete mix significantly reduces the permeability of concrete. The filtration coefficient of concrete made of compounds 1-6 is 1.3-2.0 times less than the filtration coefficient of concrete 7,

The decrease in permeability of the concrete is explained by the fact that the introduction of ashes is. mixture reduces water demand

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at the same time, due to the presence of the ash component in the ash-and-slag mixture, a colloidal type is formed in the concrete, which clogs the pores of the concrete and thereby increases its water-tightness.

Using ash mixture with

bulk density 1350 kg / m

(composition 4) leads to an increase in the permeability of concrete (composition 2).

Approximately the same strength of concrete is due to the fact that the introduction of the ash-and-ash mixture somewhat reduces the w / c, while the content in the mixture of granulated slag is reduced, which

on the runners is activated.

As can be seen from the data in Table 3, a decrease (composition 5) or an increase (composition 6) in the content of the slag in the raw mix naturally leads to an increase in the permeability of concrete 5 (compositions 1-3)

Thus, the use of the proposed mass for the preparation of the activated concrete mix in comparison with the known allows

0 sew the permeability of concrete, increase its brand of water resistance and significantly reduce the consumption of scarce granulated slag, and used in the production of cement,

5 Reducing the permeability of concrete leads to an increase in its durability and lower operating costs associated with its additional protection,

0

Claims (1)

Invention Formula An activated concrete mixture, including cement, granulated 5 blast furnace slag and water, is characterized in that, in order to reduce the filtration coefficient and improve water resistance, it contains an additional ash-and-slag mixture with bulk density 1350 kg / m in the following ratio of components, wt. Cement1 Granulated domain - 5th slag1,4-1,8 Ash and slag mix bulk density 5 1350 kg / mz 2,9-3,3 Voda 0,75-1 31364614 Table 1 The components of the composition of the composition,%, uokislov SiOj JAljOj, FeO MnO | MgO CaO JTiO UzOJ SO, Granulated slag38.9 6.7 0.4 - 0.9 2.2 48.5 - - Else Zolopshakova mix 50,1 24,2 12,2 3,6 0,1 1,9 3,20,83,0 Also table 2 The composition of the raw material is the content of the syfieva mixture, mac.ch mixture Granuliro-Zoloshlakov Cement f Water bath mixture slag (known) 1 1, 1.6 1.8 1.6 1.0 2.0 4.0 Compressive strength of concrete, Sha 31.8 33.0 30.6 31.2 0.9 0.9 0.9 0.9 0.9 0.9 0.9 Table 3 Brand of concrete for water resistance B8 B8 B8 B6 1364614 6 Continuation of table 3