RU2164901C1 - Raw mix for preparing building products - Google Patents

Abstract

FIELD: building materials industry. SUBSTANCE: raw mix comprises cement, superplasticizer, mineral component, and water. Mineral component includes brickbats having fractions, wt.%; 0-315 mm, 16-18; 0.63 mm, 6.8-8.25 mm, 10-12; 2.5 mm, 11-13; 5 mm, 18-20 ratios of components being as follows, wt %: cement, 18-20; superplasticizer, 0.0013-0.0024; broken brick, 58-63; and water, the balance. Mineral raw mix component comprises broken ceramic brickbats or broken silicate brickbats, or brickbats with fragments of masonry mortar or mixture of ceramic silicate brickbats and mortar-containing brickwork. Raw mix further comprises pigment. EFFECT: lower price of fine-piece products due to use of production waste that pollute environment. 6 cl, 2 tbl

Description

 The invention relates to the production of building materials - small pieces from a mixture based on Portland cement, containing, as a mineral component, a filler, ground battle of ceramic or silicate brick.

 It is known to use brick grains as crushed stone in concrete mixtures obtained by crushing scrap or old brickwork (see Kind V.A., Okorokov S. D. Building Materials. L .: Gosstroyizdat, 1934, p. 136, 379).

A known composition for decorative coating of building products, including wt.%:
White cement - 17.0-20.0
Ground quartz sand - 10.0-12.0
Styrene butadiene latex - 5.6-6.0
Pyrite cinder - 1.7-2.0
Ground clay brick - 54.0-61.0
Water - Else
(see USSR author's certificate N 1004304, C 04 B 18/16, 1980).

 Closest to the proposed is a raw material mixture, including mineral binder, superplasticizer, aggregate and water. Crushed old concrete is used as a filler, and a co-grinding product of strictly concrete with a superplasticizer or their mixture with cement is used as a mineral binder (see RF patent N 2156226, C 04 B 28/02, 02/14/2000, BI N 26).

 The technical task of the invention is to reduce the cost of small items through the use of large-tonnage waste polluting the environment while maintaining the operational properties of the resulting products.

The solution to this problem is achieved by the fact that the raw material mixture for the manufacture of building products contains crushed brick fractions as a mineral component, wt.%: 0-0.315 mm - 16-18; 0.63 mm - 6-8; 1.25 mm - 10-12; 2.5 mm - 11-13; 5 mm - 18-20; 10 mm - 30-36, with the following ratio of components, wt.%:
Cement - 18-24
Superplasticizer - 0.0013-0.0024
Brick Fight - 58-69
Water - Else
As crushed brick battle can be used a battle of ceramic brick (clay ordinary, face, chamotte, dinas, as well as ceramic stone), a fight of silicate brick, a fight of brickwork with fragments of masonry cement. The ratio of these fractions of crushed brick battle due to the need to obtain material with minimal voidness, which helps to reduce the consumption of binder and improve the operational properties of the products.

 In order to add color to the mixture, a pigment may also be added. The amount of pigment is determined by the need to obtain a particular color. The presence of a superplasticizer in the mixture promotes uniform distribution of the pigment. As the pigment, any alkali-resistant pigment can be used.

As a superplasticizer, all types of known superplasticizers can be used both in a dry state and in the form of aqueous solutions, including:
the condensation product of naphthalenesulfonic acid and formaldehyde, the condensation product of trimethylolmelamine;
product obtained at cracking or pyrolysis units of oil in the production of gasoline (gas oil fraction 200-300 ^o C) (see Dolgopolov NN, Sukhanov MA, Lorettova RN Concretes on binders of low water demand / VNV /, Textbook, M., TsMIPKS, 1991, S. 6-7).

 As cement, any kind of Portland cement produced by industry can be used, brands M400 - M500.

 Examples of compositions of the proposed raw mix and properties of concrete based on it are given in table. 1 and 2.

 The manufacturing technology of small pieces includes the following operations.

From mobile raw mixes
The preparation of the raw mix is carried out in forced mixers. Molding products in the form of blocks (16 dm ^{3 in} volume) continuous or with voids is carried out in individual forms with compaction on vibration platforms. Hardening of products is carried out in steaming chambers.

From hard raw mixes
Preparation of the raw mix is carried out in forced-mixing mixers, the molding of products in the form of bricks with a size of 250x120x65 mm is carried out by pressing or vibropressing. Hardening of products is carried out in steaming chambers.

 The proposed raw material mixture is intended for brick masonry, facing, small blocks, tiles, tiles, etc. products.

Claims (5)

1. The raw material mixture for the manufacture of building products, including cement, superplasticizer, mineral component and water, characterized in that it contains a crushed brick fraction fraction, wt. %: 0 - 315 mm - 16 - 18; 0.63 mm - 6 - 8; 1.25 mm - 10 - 12; 2.5 mm - 11 - 13; 5 mm - 18 - 20, with the following ratio of components, wt.%:
Cement - 18 - 24
Superplasticizer - 0.0013 - 0.0024
Ground Brick Fight - 58 - 69
Water - Else
2. The raw material mixture according to claim 1, characterized in that as a mineral component it contains ground battle of ceramic bricks.  3. The raw material mixture according to claim 1, characterized in that as a mineral component it contains a crushed battle of silicate brick.  4. The raw material mixture according to any one of claims 1 to 3, characterized in that as a mineral component it contains crushed brick fight with fragments of masonry mortar.  5. The raw material mixture according to claim 1, characterized in that as a mineral component it contains a mixture of ground battle of ceramic, silicate brick and mortar-containing masonry.  6. The raw material mixture according to claim 1, characterized in that it additionally contains pigment.

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