"UnterMix 1580 AL" dry-mixed concrete to dry injection accelerators with high addition

"UnterMix 1580 AL" dry-mixed concrete to dry injection accelerators with high addition

Product consumption calculator



Product description

UnterMix 1580 Al is a product accelerating the hardening of shotcrete.

Fields of Application

This product can be applied in the following areas:

  • Tunnels;
  • Mines;
  • Temporary or long-term hardening of rocky surfaces;
  • In the application of any kind of shotcrete to provide a high initial and final resistance;
  • Repair works.


  • Allows  one-timespray of 10-15 cm layers due to quick hardening;
  • Provides high initial resistance due to its specific formula;

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.

Technical specifications


Beige (yellowish light-brown)

Pouring volumetric weight

0,9-1,0 kg/liter

Acidity (ph)


Chlorine amount (EN 480-10)



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.

Shelf Life and storage

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.


  • When using the product,observe the operational and occupational safety regulations, and wear the corresponding safety clothing, safety gloves, glasses, and respirators;
  • taking into consideration that the product is complex mixture, immediately rinse it with water in case of contact with skin or eyes;
  • do not add any substances not indicated in the application procedures;
  • The above parameters were received on the basis of laboratory tests conducted in the ambient conditions of +230C±20C temperature and 50% +5% humidity. Depending on the ambient conditions these parameters may be changed.

Warranty and technical support

  • Information indicated in the technical specifications is based on scientific and practical knowledge;
  • “Matanat А" company is responsible only for the product quality;
  • Except for the works carried out under the guidance of the company specialists, “Мatanat  А" company bears no responsibility for any problems that may occur as a result of improper use of the product by other users;
  • The company reserves the right to make changes to its product that may occur due to a scientific and technnological development;
  • For technical support or more information please do not hesitate to contact “Matanat А" company!