SU1694384A1 - Lubricant for metal forms - Google Patents

Abstract

The invention relates to the construction industry, in particular to lubricant compositions for metallic forms in the manufacture of reinforced concrete products. The purpose of the invention is to reduce the adhesion of concrete to form. The lubricant contains, in wt.%: Acidic synthetic emulsol 2.5 - 3.5; soap-alkaline solution (in terms of total fat) 1,5 - 3; water - the rest. The lubricant consumption is 50-100 g / cm2. The amount of adhesion of concrete to the form of 0.002 - 0.003 MPa.

Description

The invention relates to the construction industry, in particular to lubricant compositions for metallic forms in the manufacture of reinforced concrete products.

The purpose of the invention is to reduce the adhesion of concrete to form.

The lubricant contains the following components, wt.%: Acid synthetic emulsol 2.5 - 3.5; soap-alkaline solution-waste alkaline refining of oils and salomas with a total fat content of at least 8%, including at least 7% fatty acids (based on total fat) 1.5 - 3; water - the rest.

The soap-alkaline solution according to Spec. 18 of the Ukrainian SSR 621-83, obtained by alkaline refining of oils and salomas, contains at least 8% of total fat and at least 7% of fatty acids bound in the form of sodium salts.

The effectiveness of the proposed lubricant is achieved by reducing the coefficient of friction, adhesion due to the presence of saponified and non-saponified fatty acids in the lubricant, which form a thin film on the metal surface of the molds. The high stability of the lubricant is due to the presence of surfactants of sodium salts of fatty acids in it.

The preparation of the lubricant is carried out in the following order; A dosed amount of soap-alkaline solution and zmulsol EX-is loaded into a paddle stirrer, with stirring, 20% of the required amount of water is added at 20 - 80 ° C. After the mixture is completely homogenized, the remaining water is added with continuous stirring, after 2 minutes of thorough mixing the lubricant is ready for use.

Due to the presence in the composition of the soap and alkaline solution of the soap emulsifier, no special equipment is required for the preparation of the lubricant; any impeller mixers can be used.

PRI me R 1. Composition of lubricant, wt.%: Soap-alkaline solution in terms of total fat content of 1.5; acidic synthetic emulsol 2.4; water 96. Adhezzi

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between the surface of the concrete and the metal surface of the concrete is 0.003 MPa, no deposits are observed on the surface of the mold after removing the concrete product, the consumption of lubricant is 50 g / m.

PRI mme R 2. The composition of the lubricant, wt.%: Soap-alkaline solution in terms of the content of total fat 3; acidic synthetic emulsol 3.5; water 93.5.

The adhesion between the surface of the concrete and the metal surface of the concrete is 0.002 MPa, no deposits are observed on the surface of the mold after removing the concrete product, the consumption of lubricant is 100 g / m2.

The use of a soap-alkaline solution, which is a by-product (fat waste), obtained by alkaline refining of oils and fat, as well as these advantages, is a way to recycle waste.

Claims (1)

Invention Formula Lubricant for metal forms in the manufacture of concrete and reinforced concrete products, including acidic synthetic emulsion, an additive and water, is different from the fact that, in order to reduce the adhesion of concrete to the form, it contains as an additive a soap-alkaline solution - waste alkaline oil refining and fat with a total fat content of at least 8%, including fatty acids of at least 7%, in the following ratio, wt.%: Sour synthetic Emulsol 2.5 - 3.5 Soap-alkaline solution in terms of for total fat1,5-3 Water the rest.