24.4 AZN
UnterMix 1580 Al is a product accelerating the hardening of shotcrete.
This product can be applied in the following areas:
Preparation of surface. The surface should be thoroughly removed of any fat, rust, paraffin, and other residues preventing adhesion, there should not be any residues remained on the surface. To save the adhesion, the surface should be cleaned with high-pressure water, and the product should be applied onto wet surface.
Selection of cement. To prevent negative effect on the period of hardening, fresh cement should be used. It is recommended to apply portland cement or sulfate-resistant cement to provide quick hardening of gunite.
Preparation of mixture. To provide acceleration of hardening in the time of application add the UnterMix 1580 Al product to the cement in the amounts preliminary defined in laboratory researches. In case the UnterMix 1580 Al product is directly added to the mixture contained in the transmixer, cement hydration process will start, and separate balls will be formed in the concrete in the transmixer unless the fractions (cement, quartz sand and etc.) are dry. Optimal water amount determined by the operator during the application eliminates these disadvantages. In case the amount of water is little, the period of hardening of shotcrete is shortened, and vice versa. That is why, water in the amount which is enough for hydration process should be added to dry concrete mixture.
Application. The rotary mixed concrete should be sprayed onto the surface with a spray gun.
Color: |
Beige (yellowish light-brown) |
Pouring volumetric weight |
0,9-1,0 kg/liter |
Acidity (ph) |
~11,0 |
Chlorine amount (EN 480-10) |
<0,1 |
Packing: |
In 15 kg sacks |
Consumption of the UnterMix 1580 Al product depends on concrete, surface and air temperature. Another important factor is compatibility of the product with the cement used. To do this, prior tests should be done for the purpose of determination of corresponding consumption.
Depending on an application area, period of hardening, and resistance, the UnterMix 1580 Al dry mix can be applied in the amount between 4-8% of the mass of mineral adhesive products (cement, volcanic ash, quartz sand, slag). In case the consumption exceeds the indicated limits, the final hardness limit may fall down.
The product can be stored during 6 months in unopened original sacks placed one on another in three rows at the temperature within +50C and +400C. In case of long-term storage the product packages should not be laid one on another. Unpacked sacks should be used within 1 week in the relevant storage conditions.
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