SU118230A1 - Lubricant for one-piece cast-iron forms in the manufacture of concrete products with heat treatment in autoclaves - Google Patents

Description

In the autoclave production of reinforced concrete products in one-piece cast iron molds, a mold lubricant consisting of graphite powder and salt oil is used.

However, this lubricant has drawbacks: it does not completely eliminate the adhesion of concrete to the walls of the molds, which leads to rejects, and in addition, the lubricant is high in cost.

The proposed composition of the lubricant is devoid of the indicated disadvantages.

The lubricant made by volume from one part of fuel oil and 0.4 parts of dust from under the cold chamber of cement plants / dyes, working on pulverized fuel, well protects the wall of the mold from sticking concrete at temperatures up to 174 ° C and its cost is significantly lower. .

The lubricant adheres well to the surface of cast-iron molds and creates a stable film. The plepka is kept until the end of sealing at 174 ° and a pressure of 8 atm in the form of a powdery layer, excluding its adhesion of concrete to metal.

For the manufacture of lubricant, one part of the fuel oil is poured into the container} / d of the required capacity, then 0.4 parts of dust are poured in small portions from under the cold chamber of cement plants, sifted through a 0.6 mm sieve with vigorous stirring until a homogeneous mass .

Grease should be ready 2-3 hours before use.

Before use, the finished lubricant is mixed and applied to the walls of the molds with a macadam brush or mechanized method.

Subject invention

Lubricant for one-piece cast-iron molds in the manufacture of concrete products with heat treatment in-autoclaves, cc. No. 118230-2 -

so that, in order to avoid sticking of the product to the form, it includes fuel oil and dust from under the cold chamber of a cement plant operating on coal-dust powder, in a ratio of 1: 0.4 in volume.