RU95107285A - Method of preparing raw mix for manufacturing building parts - Google Patents

Abstract

FIELD: manufacture of building materials. SUBSTANCE: Proposed method is, in particular, designed to be applied in manufacturing facing building parts. Invention concerns a method wherein magnesia binder is mixed with filler followed by tempering with bischofite salt solution. Method of invention is distinguished with that, before the mix is tempered, bischofite solution is preliminarily treated in magnetic field with strength 160-340 kA/m at solution flow velocity in magnetic field 0.6-1.5 m/s. Components are introduced into mix in following amounts, wt.-%: magnesia binder, 40-50; bischofite solution with density 1.17-1.22 g/sq.cm, 22-33; and filler, the balance. Preliminary magnetization of bischofite solution favors formation of denser and more fine structure of material resulting in 41% increase of bending strength of parts and more than three-fold increase of their frost resistance. Effect of preliminary magnetic treatment strengthens when, prior to be magnetically treated, bischofite solution is supplemented with hydrophobizing liquid or industrial-quality latex and cupric sulfate and also when bischofite solution is repetitively passed through magnetic field. EFFECT: increased strength and water-resistance of building parts.

Claims (1)

Usage: for the production of facing building products. Provides increased strength and water resistance of building products. The inventive method includes mixing a magnesia binder with a filler, followed by mixing with bischofite saline. Before mixing the mixture, the bischofite solution is pre-treated in a magnetic field with a strength of 160 - 340 kA / m at a flow rate of the solution in a magnetic field of 0.6 - 1.5 m / s. The components are introduced into the mixture in the following ratio, wt.%: Magnesian binder 40 - 50, bischofite solution with a density of 1.17 - 1.22 g / cm ³ 22 - 33 and the aggregate - the rest. The preliminary magnetization of the bischofite solution contributes to a denser and finer-grained structure of the product material, which increases the bending strength of the products by 41% and increases their water resistance more than 3 times. There is also an increase of more than 30% frost resistance of these products. The effect of preliminary magnetization of a bischofite solution is enhanced when a hydrophobizing liquid or technical latex and iron sulfate are introduced into it before magnetization, as well as when the bischofite solution is repeatedly passed through a magnetic field.