SU981277A1 - Complex additive for cement-based concrete mix and process for preparing the same - Google Patents

Description

(Sk) COMPLEX ADDITIVE FOR A CEMENT-CONCRETE MIXTURE AND A METHOD FOR ITS PREPARATION 1 The invention relates to the construction, namely to the composition of complex additives for a cement-concrete mixture and methods for its preparation. A concrete mix is known, including cement, aggregate, water, and complex additive — the emulsion of bottoms of synthetic fatty acids in an aqueous solution of sulphite-yeast of your mash 111 Most close to the invention is a complex additive, including, by wt. acids (COSMA) 2-k Sulphite-drosheva brew (RRM) 2-k Salt of inorganic acid 50-60 Mineral powder 20-25 Portland cement Water Else The method for preparing this complex additive for the cement mixture is as follows. The bottoms of synthetic fatty acids are successively mixed with sulphite-yeast wort, water, mineral powder, inorganic salt and portland cement to obtain a homogeneous mass, which is then molded into briquettes and cured. To prevent sticking, the formed briquettes are powdered with mineral powder. This additive does not allow to obtain a product of high crack resistance and durability according to the required indicators. In order to obtain concrete with improved crack resistance and durability properties with the addition of a prototype, an increased consumption of cement is required.

The goal is achieved by the fact that the complex additive, including bottoms of synthetic fatty acids, sulphite-yeast mash, sodium nitrite, mineral filler and water, contains asbestos as a mineral filler, with the following ratio kc) components, wt .:

Bottoms

synthetic fatty acids2-4 Sulfite yeast mash2Nitrite sodium 50-60 Asbestos22-29 Water Else

In the method of preparation of complex additives, including sequential mixing of the cubed residues of synthetic fatty acids, sulphite yeast brew, water, mineral filler and salt of inorganic acid, briquette molding, curing and dusting, preliminarily sulphite-yeast mash is combined with asbestos mineral filler

The additive is supposed to be taken into concrete in the amount of 0.5-25% by weight of cement, the optimum is k% by weight of the dry matter of the concrete mixture.

Sosgam mompleksnyh additives and physico-technical siostva betoi

The following materials are used for the preparation of concrete mixtures: Cement M-AOO Karaganda Cement-. go plant, crushed stone limestone Maikuduk quarry, quartz Kalagir quarry.

The bottom residues of synthetic fatty acids were used as a hydrophobic agent, RRM was used as a hydrophilizer, sodium nitrite was used as a salt of an inorganic acid, and asbestos was used as a fibrous filler. The consumption of cement, sand, rubble, water in all compositions is assumed to be the same, kg / 1 cement - 360, sand 67, rubble - and the water-cement ratio is 0.4

The dosage of the proposed additive in compositions 1-3 is assumed to be 4 by weight of cement, the dosage of additive of the prototype is O, k% by weight of cement The dosage of asbestos in composition No. 5-1 by weight of cement, which corresponds to the content of asbestos in the proposed additive (.cm, tab. .).

The proposed additive allows to increase the crack resistance, frost resistance and strength of concrete, as well as to reduce the consumption of cement. It can be used for the preparation of concrete mix with additives in the production of concrete and reinforced concrete products, as well as ready-mixed concrete.

Formula of the invention 1. Complex additive for cement-concrete mix, including bottoms 6 of synthetic fatty acids 5 sulphite-yeast mash, sodium nitrite, mineral filler and water, in order to increase the frost resistance of the strength and crack resistance of the concrete.

It contains asbestos as a mineral filler in the following ratio of components, wt, wt: Distillation residues of synthetic fatty acids 5-2 Sulphite-yeast brew 2Nitrite sodium 50-60. Asbestos 22-29 Water Else 2. Method of preparation of an additive for cement-concrete mix / consisting in sequential mixing of bottoms of synthetic fatty acids, sulphite-yeast brew, water, mineral filler and inorganic acid salt forming briquettes, their curing and mineralization with mineral a filler, characterized in that a sulphite-yeast mash is combined with a mineral filler, asbestos.

Information sources,

taken into account when examining I .-

1.Higerovich M.I. and Bayer V.E. Improving the properties of concrete with organic additives. Overview information VNIIESM. M., 1975, p.

2.Avtorskoe: videtelstvo USSR on the application t 2612523 / 29-33,

.l, C O B 13/2, 1979.

Claims (2)

The claims ^{; 5} 1. A comprehensive additive for cement-concrete mixture, including bottoms of synthetic fatty acids, sulphite-yeast mash, sodium nitrite, mineral filler and WATU, characterized in that, in order to increase frost resistance, strength and crack resistance of concrete, it contains asbestos as a mineral filler in the following ratio of components, wt.%: VAT residues tetic fatty 5 acids 2-4 Sulphite-yeast mash 2-4 Sodium nitrite 50-60. Asbestos 22-29 to Water Rest 2. The method of preparing a complex additive for cement concrete mix, which consists in sequentially mixing bottoms of synthetic fatty acids, sulphite-yeast mash, water, mineral filler and inorganic acid salt, forming briquette curing and dusting with a mineral filler, I distinguish The fact is that previously sulfite-yeast mash is combined with a mineral filler - asbestos.