SU1008186A1 - Method for preparing copmlex additive for concrete mix - Google Patents

Abstract

A METHOD FOR PREPARING COMPLEX ADDITIVE FOR A CONCRETE MIXTURE by heating the hydrophobicizing i component based on fatty acids to 50-55 ° C, mixing it with a sulphite yeast briquette, sodium nitrite, two-sided gypsum, followed by agglomeration in a number of bastants, and in a number of bastants in a number of blankets, given in a number of bastants, and in a number of bastants in a number of blanks, followed by agglomeration in a number of bastants in a number of blankets, given in a set of bastants, and in a numbered plaster, followed by agglomeration in a number of bastants in a number of blankets in a set of bastants in a number of blankets, and in a number of bastants in a set of horticultural masks, followed by agglomeration in a number of bastants in a number of blankets in a set of bastants in a number of blanks, followed by agglomeration in a set of bastants in a number of in-room varieties. BO-BO with, o tl and h aa y and with the fact that, in order to increase the plasOcicity of the concrete mix and accelerate the process of briquette solution, soap stock is used as a hydrophobicizing component, which is mixed with a preheated 50 -e5 With a sulphite yeast brew, after which it is emulsified under a pressure of 1.0-1.2 MPa, I-sodium, two-water gypsum is introduced into the emulsion, and after brie (L-curing is heat treated at 120-150 ° C for 1-1 5 hours

Description

oo: The invention relates to the construction and manufacture of building materials, and specifically to methods for preparing complex additives for concrete mixtures. A known method of preparing a complex additive for a concrete mixture consists in heating the pid of the phobic component (bottom residues of synthetic fatty acid at 40-50 ° C, followed by mixing with a sulphite yeast mash, carrying out an emulsification process and agglomerating the jjl mixture. However, the additive obtained by this method slowly dissolves in water. The closest to that proposed by the technical essence and the achieved result is the method for preparing the complex additive for concrete mix, according to but which is heated by a hydrophobic compound based on synthetic fatty acids to 50-55 ° C, it is mixed with a sulphite-yeast brew, sodium nitrite, two-water gypsum, followed by agglomeration into briquettes by hot pressing at 50-80 ° C. However, the briquette the additive obtained by a known method slowly expands even in hot water, clots of non-emulsified water-repellent agent are observed on the surface of the solution, and the plasticizing effect of the complex additive is not satisfactory. The reason for these phenomena is the coarse globular composition of the emulsion. The purpose of the invention is to increase the plasticity of the concrete mix and accelerate the process of briquette dissolution. This goal is achieved by the fact that, according to the proposed method of preparing the complex additive for a concrete mix, soap stock is used as a hydrophobic component, which is mixed with a sulphite-yeast baking agent preheated to 50-55 ° C, and then emulsified under pressure, 1.6-1, 2 MPa, sodium nitrite, dihydrate gypsum and then briquetting are heat treated at 120-150 ° C for 1-1.5 hours. Example 1. Heat the sulphurite yeast mash to 50 s and mix it in soy disperser drain. Thereafter, it is emulsified under a pressure of 1 MPa, sodium nitrite and dihydrate gypsum are introduced into the resulting emulsion and mixed in a paddle mixer until a homogeneous mass is obtained. The homogeneous mass is agglomerated into briquettes by hot pressing at 50 ° C. The resulting briquettes are heated to 120 ° C and held for 1 hour. Example 2. The method is carried out as in Example 1, except for the pressure during emulsification, which is 1.1 MPa, and the briquette heat treatment mode: 135 ° C for 1, 5 h. Example 3. The method is carried out analogously to example 1 with the exception of emulsification pressure of 1.2 MPa and briquette heat treatment mode: 150 ° C for 1 h. For testing, a concrete mixture of the following composition is used, kg / m: Cement grade 400 546 Quartz sand (, 1) 860 Limestone crushed stone (fractions 5-10 and 10-20 mm) 1044 Water 300 Composition of the additive, parts by weight : Soapstok1,0 Sulfite no-yeast and mash2,0 Sodium nitrite 25.0 Ground dihydrate gypsum 72.0 The ability of the complex additive of the briquette to solubility is estimated in minutes with manual stirring to a concentration of 10, 30 and 50% (water temperature in which the briquette is placed -addition is 20 ° C). The activity of the complex additive is assessed by its plasticizing effect (cone sludge) on the concrete mix. Concretes are steamed according to the mode 2 + 3 + 8 + 2. I The test results are shown in the table.

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As follows from the data in the table, In addition, the briquette additive, the precomplex briquette additive prepared by the proposed method, in the proposed method, two or more times faster and gives the concrete a mobility mixture (without bunches of water-repellent agent for 20- 40% higher than that of the additive from the surface) dissolves in water than that prepared by the prototype method. 5. The ket obtained by the anti-type method.

Claims (1)

METHOD FOR PREPARING THE COMPLEX ADDITIVE FOR CONCRETE MIXTURE by heating the hydrophobizing ι component based on fatty acids to 50-55 ° С, mixing it with sulphite-yeast mash, sodium nitrite, double-gypsum followed by agglomeration into briquettes by hot pressing at 50 ° It is important that, in order to increase the plasticity of the concrete mixture and accelerate the process of dissolving the briquette, co-stock is used as a hydrophobizing component, which is mixed with pre-heated to 50 -:> 5 ^о С sulfite yeast mash, after which it is emulsified under a pressure of 1.0-1.2 MPa, NYTrit § sodium, two-gypsum gypsum is introduced into the emulsion obtained, and after briquetting, heat treatment is carried out at 120-150 ° C for 1-1.5 h V 9818001 ns