SU446482A1 - The method of preparation of mortars - Google Patents

Description

In PTB

 There is a known method of preparing mortars, which consists of mixing lime, an active mineral additive and gypsum, mixing with water and refining.

The disadvantage of this method is the high density of the obtained products, which necessitates their drying.

To simplify the production technology of the proposed method, slaked lime powders and active mineral additives are preliminarily separately moistened with water in an amount of 20-35% of their weight, mixed, and dry semi-aqua gypsum powder is introduced into the resulting mixture.

The method is carried out as follows.

Based on the calculation of the required amount of water for the formation of dihydrate gypsum and calcium hydrosilicate, the reaction of gypsum limestone pizzolane orb in the caustic with the water is used to prepare corroded poro-lime of slaked lime and an active mineral additive containing the calculated amount of water. The lime is slaked in such a way that the slaked lime powder contains 20-35% free water. The same amount of water is added to the active mineral additive powder. Moist yoroshki of hydrated lime and active mineral admixture are mixed with each other, and the designs, immediately before molding, semi-aquatic gypsum are introduced into the mixture. | The resulting mixture is immediately placed in the form and subjected to pressing. The pressing time of the mass set is set, hardened and; It acquires sufficient strength to immediately dismantle products.

Example. In the manufacture of perforated plaster screens of 600x600 mm in size, the molding masses are prepared as follows: 0.6 kg of ground tripoli humidified with 0.18 liters of water, and 0.66 kg of damped

lime - 0.20 l of water (impose an activity before slaking 78.8.)

The moistened powders are first mixed together, and vatem with 1.8 UG of gypsum plaster.

The resulting products have low humidity, which allows to simplify the technology of their production, refuse to dry products and reduce fuel consumption.

The method can be used in the manufacture of products from gypsum limestone-benther mortar.

SUBJECT OF INVENTIONS

The method / approach for building rasheoroe is vakdrchyas in the mixing of limestone, active mineral additive and gypsum, mixing with water and mixing, different from the fact that, in order to simplify the process; production, hydrated lime powders and active mineral additive are previously separately moistened with water in an amount of 20-35% of their weight, mixed, and dry semi-aqua gypsum powder is introduced into the resulting mixture.