Emulsion GKE-50-94M is an aqueous emulsion of organosilicon liquid oligomethylhydridesiloxane (GKZH 136-157M) with additions of emulsifier, biocides, stabilizers.
Synonyms: polymethylhydrogensiloxane, polymethylhydrosiloxane, oligomer-containing hydride, methylhydrosiloxane polymer, polymethylhydridesiloxane.
Hydrophobic liquid (emulsion) GKE 50-94M as an additive in cement mortars improves the characteristics of concrete:
Hydrophobization can be carried out in two ways:
1. During volumetric hydrophobization, the silicone emulsion GKE 50-94М is added to the gypsum or cement mixing water. To achieve the water absorption reducing effect, about 0.2-0.8% of the emulsion from the amount of dry gypsum or 0.1-0.2% from the amount of cement is sufficient. This reduces their water absorption and water permeability, increases the plasticity of mortars, the strength of plaster and screed, increases the frost resistance of concrete of normal hardening, regardless of their composition and type of binder.
The emulsion should be introduced together with mixing water, or after - into the finished composition, provided that the mixer kneads for at least 20 minutes.
The effectiveness of the silicone emulsion GKE 50-94M depends on the quantitative and qualitative composition of the mixture, therefore, exact dosage recommendations cannot be provided. It is always necessary to conduct preliminary tests to identify the optimal amount of emulsion GKE 50-94M.
Various gypsum materials production plants use both the pure product GKZH 136-157M and its water emulsion GKE 50-94M. The addition of water repellent in terms of pure silicone is 0.15-0.2% of the gypsum binder.
According to the standards requirements, the gypsum plasterboard water absorption should be no more than 10% (ordinary plates up to 40%), tongue-and-groove plates less than 5%.
Hydrophobic emulsion GKE 50-94M addition to concrete:
As a result of the studies, it was found that the optimal concentration of GKE 50-94M in concrete / cement solutions is 0.1-0.4% by weight of cement. This amount of emulsion allows to achieve a minimal water absorption and permeability of concrete structures.
The tests on the concrete F 200-300 W 6 В - 15 with water-repellent emulsion GKE 50-94М proved that it is required to use 1 kg of emulsion GKE 50-94М for 1 m3 volume sample production.
Recommended amount of silicone additives, depending on the type of cement used as part of complex additives, in % of dry cement:
| Cement used | Emulsion GKE 50-94М addition, % |
|---|---|
| Portland cement, quick setting Portland cement | 0,1-0,2 |
| Sulfate-resistant Portland cement | 0,1-0,2 |
| Plasticized Portland Cement | 0,1-0,16 |
| Hydrophobic Portland Cement | 0,1-2 |
| Slag Portland Cement | 0,08-0,12 |
The most effective way to solve the problem of the water negative effects and other atmospheric factors is the facade surfaces treatment with 5-10% water emulsion GKE 50-94M. As a result, the water absorption of materials is reduced tenfold and their service life is significantly extended.
For surfaces hydrophobization, emulsion GKE 50-94M is used after dilution with water.
Dilution rate: for 1 liter of emulsion GKE 50-94M - 9-10 liters of water. Diluted solutions can be applied by dipping, spraying or brushing. Apply the working composition to a dry, cleaned surface until it stops absorbing, avoiding drips and leaving drops. The second coat is applied wet on wet until the first coat dries.
The consumption of the working solution depends on the porosity of the processed material and averages 350 ml per 1 m2. Always test the selected fluid concentration on a small sample of material to determine its suitability.
During surface hydrophobization, the surface should be protected from mechanical damage. During hydrophobic treatment by the bulk method, the emulsion GKE 50-94M is distributed over the entire thickness of the building material, as a result of which mechanical damage to the upper layers does not affect the hydrophobic properties of the lower layers.
Store in original container at temperature from 0°C to +30°C. Store in a cool, dry, well-ventilated place. Protect from direct sunlight and freezing.
Store away from oxidizers, strong acids, alkalis and other chemicals having alkaline reaction for example, ammonia, amines).
The guaranteed shelf life in original container is 12 months.
Storage over the date specified on the label does not necessarily mean the product is unusable. In case if store more please check the properties of product before use.
Special polymer containers up to 1 m3, equipped with a safety valve.
Emulsion GKE 50-94M is nontoxic, explosion-proof, noncorrosive, evolves no harmful vapor nor gas, produces no irritating action to skin and conjunctiva. Detailed instructions are given in the relevant product safety data sheet. It can be provided upon request.
| Parameter name and measure unit | Standard |
|---|---|
| Appearance | Emulsion of white to light gray |
| Odor | Slight odor of acetic acid |
| Water repelling ability, h, min | 3 |
| Watering ability | stands the test method, set out in the specifications |
| Density at (+25±0,5)°C, g/cm3 | 0,980 – 1,020 |
| Volume solids, min,% | 50,0 |
| Reaction of the medium рН | 3,0 – 5,0 |