SU1320196A1 - Raw mixture for preparing heat-resistance concrete - Google Patents

Abstract

- The invention relates to the receipt; N.IU phosphate concretes. The purpose of the invention is to increase the strength in the early stages of hardening of concrete and increase thermal resistance. The raw mix for the preparation of heat-resistant concrete includes the following components, wt,%: aluminophosphate binder 10-20; chamotte-carborundum aggregate 50-70; spent alyumokhromovy catalyst 10-15 and zircon the rest up to 100%. As a result of the introduction of the aluminum-chromium waste and fireclay carborunum aggregate into the mass containing zircon and the aluminophosphate bond, the concrete mixture acquires the ability to spontaneously harden in air conditions, acquiring in a daily age strength sufficient for stripping, transportation and installation of products. 2 tabl.i (L with 05

Description

FIELD OF THE INVENTION The invention relates to compositions of raw materials for the manufacture of refractory concrete.

The purpose of the invention is the penetration of concrete in the early stages of hardening and the increase in thermal resistance.

The chemical composition of the spent catalyst for the production of synthetic rubber IM-2201 - aluminum chromium waste contains, wt.% G

A1, 0h

Cr. O,

SiOi

,

7G-75 14.0-lf, 0. -6-12

0.5-1 Else

Zircon is used in the form of zircon concentrate KC-1, which contains more than 65% ZrO in its composition. According to the main physicomechanical viewpoint, it meets the requirements of OST 48-82-7-.

The phosphate binder is an aluminophosphate binder, obtained by mixing an alkaline aluminum pickling sludge waste consisting mainly of A1 (OH) with 60% orthophosphoric acid. The ratio of the components of the pr-and preparation of the binder should correspond to the production of monosubstituted aluminum phosphate). Chamotte and carborundum crowbars with a jaw crusher are converted into crushed stone of a fraction of 5-10 mm and into sand of a fraction of 0-5 mm. The ratio of fractions in the filler is 1: 1. The ratio of fireclay and carborundum in the aggregate is also 1: 1.

Example. For the manufacture of concrete samples, spent IM-2201 catalyst was used as an additive. It is a pale green powder with an apparent density of 4300 kg / m and a natural mass of 990-1100 kg / m.

The compositions of heat-resistant concretes are given in Table. one.

The dry ingredients taken in a predetermined amount were mixed. Then, the mixture of the shutter xy with the aluminophosphate binder solution was mixed, and the mobility of the concrete mixture was determined, which was evaluated by cone shrinkage.

tab. 2

To determine the compressive strength, samples were formed - cubes 7x7x7 CMj that were kept in air at 20 ° C for 1, 3 j 7, 4 and 28 days

Thermal stability tests were carried out using the water heat shift method in the mode of 20-800-20 C,

The test results are given in

 tab. 2

five

0

five

thirty

35

0

five

five

As can be seen from the table. 2, the concrete mix has a good workability compared to the concrete mix with no added catalyst. As a result of the introduction of the aluminum-chromium waste and fireclay carborundum aggregate into the mass containing zircon and aluminophosphate linkage, the concrete mixture acquires the ability to spontaneously harden in air conditions, gaining strength sufficient for stripping, transportation and installation of products at a daily age. In this case, the technology of manufacturing products from heat-resistant concrete is simplified, since heat treatment is eliminated.

Heat treatment of products can be carried out directly assembled in the heat unit.

Increasing or decreasing the components of the raw mix for the manufacture of refractory concrete beyond the specified limits leads to a decrease in phi. zico-mechanical parameters (compounds 1 and 5). In composition 1, a decrease in the amount of aggregate leads to loosening of the structure, and in composition 5, there is a lack of finely ground additive and binder.

Claims (1)

Claims. Raw mix for the preparation of heat-resistant concrete, including phosphate binder, refractory aggregate and zircon, characterized in that, in order to increase strength in the early periods of hardening and thermal stability, it contains as phosphate bond an aluminophosphate bond, as refractory filler - chamotte-carborundum and additionally spent chromium aluminum catalyst for the production of synthetic rubber at the following components, wt.% :. Aluminophosphate bond Chamotte-carborne aggregate Chamotte-carborundum the battle Zircon KC-G Spent-catalyst IM-2201 Aluminophosphate bond Editor L.Pcholinsk Compiled by O. Motorina Tehred M. Morgental Proofreader A.Zimokosov Order 2575/21 Circulation 587 VNIITI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 Production and printing company, Uzhgorod, st. Project, 4 3201964 Spent alum-chromium catalyst for synthetic rubber production Zircon 10-15 Else Table 1 . 80 7.5 7.5 5 Table 2