SU68063A1 - Hydraulic to throttle - Google Patents

Description

This invention relates to the use of Sorel cement as a hydraulic binder. Until now, magnesia grafting is used only in dry places. For the use of cement Sorel as a hydraulic fluid, it is recommended to use it in a mixture with known hydraulic additives (pumice, tuff).

It is proposed to mix the initial product (caustic magnesite or dolomite) with solutions of magnesium chloride or magnesium sulphate or other soluble magnesium salts, and then introduce such hydraulic (pussolic) additives as pumice, tuff, diatomite.

Magnesium oxide is practically insoluble in water, and in solutions of salts, especially strong ones, it dissolves well. The solidification of this basic is due to the formation of magnesium oxide hydrate as well as magnesium oxychloride. Mg (OH) 2 is not soluble, and chlorine oxide is a water-soluble compound. In the absence of MgCb-MgO, they almost do not react with active silica, due to the insignificant solubility of MgO in water, and its significant solubility in a salt solution makes it possible to interact with active SO2. The active SiO2 hydraulic additive adsorbs MgO to form a durable water-insoluble product, and magnesium chloride is washed out with water. The experiments carried out in this direction, i.e., experiments on obtaining a hydraulic binder with chemically pure SiO2, gave positive results - the strength in water and variable storage is doubled compared to air storage. At the same time, the total amount of MgCb in the samples with variable and water storage is reduced to 0.3%. Further, it should be noted that the addition of SiO2, entering into interaction with MgO, reduces and retards the formation of magnesium oxychloride in the magnesia-hydraulic in the binder.

№68063

In the well-known hydraulic, AlgO enters only as an impurity in the living area, and in the predominantly existing substance, the bulk of the cement is

and SiO2.

The ratio between the visitor and the hydraulic (pozolanic) additive may vary depending on its purpose and activity. For example, for use with a pumice additive in wet places it is possible to apply the following relationship:

1. Caustic magnesite 30%; additive / about

2. Caustic dolomite / 9 additive 30%

The amount of trap (A-lgCb, A1gSO4, etc.) for each additive is taken depending on which baking material is prepared (pressed, rammed or plastic) and which co-centration is taken by the solvent. When the concentration of the solution MgCb or MgSO4 at 35 ° should be taken when debumming pumice or tuff:

1. For cement Sorel

in pressed - 35% clogged in tamped - 50%

in plastic - 55%

2. For caustic dolomite

in molded - 28% closure

rammed - 34%

in plastic - 40%

In case of weaker diluent solutions, their amount should be increased accordingly. Additives with a low bulk density, such as diatomite, should be added a much larger number of solvents.

Subject invention

The use of cement Sorel with nucolanic additives as a hydraulic in the pit.