SU1454807A1 - Claydite-concrete mix - Google Patents

Abstract

The invention relates to the building materials industry and can be used to make constructive lightweight concrete products. The purpose of the invention is to reduce water absorption, increase strength and frost resistance. Expanded clay concrete mixture contains, wt%: calcined lime-containing waste sugar production 22-30; claydite fractions 5mmi5-10mm in the ratio of 1: 1-30-40j belitovy slime 8-15; analgin-containing waste production of 0.3-1.0; water the rest. Compressive strength of concrete up to 15.1 MPa; frost resistance of 25 cycles; water absorption, 14.8%. 1 tab. with

Description

t

The invention relates to the construction materials industry and can be used for the manufacture of lightweight structural products.

The purpose of the invention is to reduce water absorption, increase strength and frost resistance,

The following components are used as raw materials for the formulation of the mixture:

limestone waste of sugar production, calcined (thermally activated) at 900-950 C for 1-2 hours, specific surface area about 500, activity 81% (CaO + + MWO), chemical composition, wt.%: SiO 3, 18; AljG, 5.32; 2.0l; CaO 84.96; MgO 2.17; loss on ignition; the rest;

Belite slurry of an alumina refinery (natural, from a slurry floor), dried to an air-dry state and ground to a specific surface of 350 m2 / kg, chemical composition, in wt.%, mass%: 42; Al-tO, 3.81; Re ,, 0з 3.71; CaO 54.29; 1.41; 0.60; loss on ignition; belite sludge is obtained as bleached waste in the production of alumina from alkaline aluminosilicate rocks; it contains the mineral whitens: 2CaO SiO in the amount of 60-80%, calcium carbonate CaCOj 5-25%, alkali 1.5-h3, 0%, including water-soluble 0.2-1.2%, and is characterized by pH 9.8-12.0; This sludge has individual stinging properties.

ate

4sai

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however, in the ecTecTB eiHHOM state, these properties are poorly expressed;

claydite with a grain size of 0-5 and 5-10 mm with a bulk bulk density of 750 and 550 kg / m, respectively, with a ratio between the fractions of 1: 1;

Waste from the production of dipyrone resulting from technological processes of casting, transporting, packing ampoules of dipyrone, waste is a 50% concentration of a water solution of 1-phenyl-2,3-dimethyl-4-methylaminopyrazolone-5-H-methanesulfate sodium whose formula

.

The molecular weight of this compound is 361.36. The structural formula is

sn

sn,

/ V

shit t

Sbn

about

CH2-

In its natural form, the production waste of analgin has a pH of 5.9 and is an acid activator.

First, the belite sludge in dry form is mixed for 2-3 minutes with the production of dipyrone (in terms of dry substance), diluted with the required amount of water. Then, calcined lime containing waste from sugar production is introduced, followed by 5-7 minutes of mixing. C. A homogeneous mass is added to expanded clay mixed to a uniform distribution of the granules (3-5 minutes). The clay mass is put into metal molds with a size} and 40x40x x40 mm using a plastic molding method, using a short vibration compaction on a vibrating table (1 minute and, after 24 hours, holding above water, is subjected to hydrothermal treatment in an autoclave at 175 C according to mode 2-8 2 hours

Ceramite-concrete mixtures are prepared in a similar manner by a known method,

The compositions of the mixtures according to the invention and the basic physicomechanical properties of the samples of expanded clay concrete are given in the table.

The optimum values of formulations 1–3 provide the highest properties of the finished products. Disadvantage

belite sludge in composition 4 with unchanged amounts of other components, although it reduces the bulk density, it also causes a drop in compressive strength (below 10 MPa) and frost resistance, a decrease in water absorption.

five

five

0

The lack of lime component and activator - production waste

analgin (0.2%) in example 5 with an increase in the amount of claydite (up to 44%) at the same time significantly reduces the quality of expanded clay concrete. Similarly, the positive effect is not achieved according to example 6; in spite of the increased quantities of both in the living components: lime and belite, the swine volume of the production of analgin (1.2%) causes a small

0 strength with increased volumetric mass of products.

The advantage of the optimal composition of the proposed claydite-concrete mixture compared to the known one is expressed by the possibility of making lightweight and at the same time high-strength claydite-concrete, which is characterized by reduced bulk weight and water absorption which is low for claydite-concrete , better frost resistance and lower thermal conductivity coefficient - the resulting lightweight keramzite concrete has improved heat-shielding properties, which It makes it possible to use it not only for the manufacture of enclosing, partitioning and thermal insulation, but also for supporting structures, high-strength panels, blocks. : And elements with low weight and enhanced thermal insulation properties.

The hardening of the proposed claydite-concrete mixture intensively occurs under hydrothermal conditions and due to the bilateral activation of belite sludge under the influence of highly active calcined lime-containing waste from sugar production, which in the form of CaO reacts directly with Belite 2CaO, with the formation of the corresponding new formations of calcium hydrosilicate type of enhanced basicity . In this case, the chemical activation of the crystal lattice of the relatively inert silicate, belite, by the production waste, takes place.

0

514548076

analgin, which results in a decrease in water absorption, an increase in reactivity, increases strength and frost resistance, and this bleaching-containing waste, together with lime calcined waste from sugar production, binds the claydite aggregate to high-quality whiteberry sludge as a filler and additionally analgesic waste production of dipyrone in the following ratio, wt.%:

durable concrete conglomerate.

Form m l l and from gain

A lightweight aggregate mixture, including calcined lime-containing waste from the sugar industry, expanded clay of 5 mm and 5-10 mm fractions in a ratio g 1: 1, filler and water, with the aim that

reduce water absorption, increase strength and frost resistance;

0

g

It holds as a filler white sludge and additionally analgin-containing production of analgin in the following ratio of components, wt.%:

Burnt lime-containing waste sugar production.

The specified clayite Belitovy slime Analginsovodyaschy waste production Water

22-30

30-40

8-15

0.3-1.0 Else

Components and indicators

Soderkanne components in components “wah, nas.X, proposed by J famous

Optimal values

Editor M.Nedoluzhenko

Compiled by F. Sorin

Tehred M. Didyk Proof-reader I. Erdeyi

Order 7407/28

Circulation 589

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

Beyond Limit

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Claims (1)

Claim Expanded clay mixture, including calcined lime-containing waste from sugar production, expanded clay fractions of ^ 5 mm and 5-10 mm in a ratio of ₁₅ 1: 1, filler and water, characterized in that, for the purpose of I reduce water absorption, increase strength and frost resistance, it contains as a filler a belite sludge and an additional analgin-containing waste product of production of analgin in the following ratio of components, wt.%: Calcined lime-containing waste from sugar production. 22-30 Specified expanded clay 30-40 Belite sludge 8-15 Analgin-containing waste products 0.3-1.0 Water Else Components and indicators The content of the components in the compositions MasD proposed _________________________ I ...... famous Optimal values Outrageous values J ^! ..L ³ ... ' P. 1 ⁸ I ⁹ Waste content sugar production 22 25 thirty 22 20 32 11.5 12.0 13.0 Velit um . 8 10 . fifteen 6 8 17 - - - Expanded clay 40 42 thirty 40 44 28 38.5 39.8 41.0 Analgin production waste 0.3 1,0 0.5 0.3 0.2 1,2 - - Water 29.7 22 24.5 31.7 27.8 21.8 30.9 31.8 25.8 A1F Production Wastes * - L - - - - 9.5 6.4 11.7 Sand - - - . - - - 9," 10 8.5 Bulk weight, kg / m ’ 700 740 800 "80 650 830 850 930 900 Compressive strength, MPa 10.5 13,2 15, ¹ Λ8 7.1 9.2 5,0 8.6 6.5 Water Absorption, X 17,2 15.4 14.8 19.5 20,0 15,2 23.0 21.0 21.8 The coefficient of thermal conductivity, W / (i-K) 0.18 0.20 0.22 0.17 0.16 0.23 0.24 0.28 0.2 " Frost resistance, cycles 20 25 25 12 12 fifteen 10 12 12