SU1636405A1 - Stock mixture for preparing lightweight concrete - Google Patents

Abstract

The invention relates to building materials, in particular to the production of lightweight concrete based on expanded clay gravel for the manufacture of concrete products for various purposes. The aim of the invention is to increase the strength of concrete while reducing the consumption of cement. This is achieved by the fact that the raw mixture includes a large, coarse and fine aggregate, while containing expanded clay as a fine aggregate, and neutralized waste of the process of iron pickling as the filler in the following ratio of components, wt. , 96-- 1.06; expanded clay gravel 1.56-1.62; expanded clay sand 0,70-0,78; neutralized waste pickling process of iron 0,36-0,41; water 1.11-1.20. The tensile strength of products from the raw material mixture of the indicated composition at the age of 28 days is -h / 30 ME. 2 tab. e $ (L S

Description

The invention relates to building materials, in particular to the production of lightweight concrete based on expanded clay gravel for the manufacture of concrete products for various purposes.

The aim of the invention is to increase the strength of concrete while reducing the consumption of cement.

Lightweight concrete mixture, including, large, fine aggregate, filler-and. water, as a large aggregate contains expanded clay gravel, as a fine aggregate - expanded clay sand, and

as a filler, neutralized waste of the process of iron pickling in the following ratio of components, weight.h,:

Portland cement 0.96-1.06

Claydite

gravel1,, 62

Claydite

sand 0,70-0,78

H she called

process waste

pickling 0,36-0,41

Water1.11-1.20

The introduction of clay sand in the raw mix as a filler,

ABOUT

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four

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regulating - interanovial hollowness, in combination with other components in the mixture contributes to an increase in strength while reducing the consumption of cement.

Neutralized waste of the process of iron pickling is used as a mineral filler in the raw material mixture — waste hardware production is the final product of treatment facilities formed as a result of neutralization with lime milk Ca (OH) g of sulfuric acid effluent obtained after chemical treatment of sulfur with sulfuric acid . The aggregate state of the waste is fine slag with a moisture content of 45-50%,%:

Iron hydroxide 80-85 Dvovodny sulfate2

calcium 15-20

Concrete mix, prepared as follows.

A mixture of expanded clay gravel 5-10: 10-20 40, 60% is prepared, with a density of 500 kg / m3, which is mixed with expanded clay sand of 700 kg / m5. Next, Portland cement mark 400 is added and the iron pickling process waste is in a dry state, after which the mixture is shut with water, stirred, and the cone sediment is determined (1-3 mm). Cube samples were made from the mixture with a 15 cm rib for later testing. 3

For experimental verification of the composition, six mixtures of components are made, three of which show optimal results.

The compositions of the raw material mixtures of light 4 concrete are given in Table 1 (sediment cone for all mixtures f-3 cm)} the basic characteristics of concrete based on the raw mixtures given in comparison with the properties of concrete according to the known 4 compositions are in Table 2.

The proposed light-weight concrete mix for the manufacture of products from lightweight concrete has a significantly higher strength, which entails the expansion of the field of application of products from this concrete composition, as well as the improvement of its durability. The use of raw mix also leads to savings in cement. In the proposed raw mix, cement 400 is used in an amount less than in the known raw mix.

In addition, the invention allows for the disposal of waste.

I

In order to save raw materials, instead of expanded clay sand, sand precipitation chambers for the production of expanded clay gravel in rotary kilns can be used.

Claims (1)

Invention Formula Raw mix for making lightweight concrete, including Portland cement, expanded clay gravel, fine aggregate, filler and water, which, in order to increase the strength of concrete while reducing cement consumption, contains fine clay aggregate, as a filler, neutralized waste of the process of iron pickling in the following ratio of components, ma.h, g Portland Ceramsite gravel Expanded clay dog Neutralized waste process of iron pickling Water Taylitsa2 st bark 1087 1075 1035 1036 1047 1026 1042 16.6 24.2 24.3 25.5 16.7 7.9 19.0 At 15 B 15 B 22.5 B 22.5 B 22.5 B 15 B 7.5