Astra Belmix Polypropylene Fibra - Reliable Micro -Armature of Concrete

Astra Belmix Polypropylene Fibra - Reliable Micro -Armature of Concrete

 

Astra Belmix polypropylene fiber is a multifilament microfiber made of high-quality isotactic polypropylene using modern technology. Due to its optimized mechanical and chemical properties, this fiber is considered one of the most effective additives for microreinforcement of concrete and cement mortars .

The main purpose of polypropylene fibers is to reduce plastic shrinkage, prevent microcracking, and improve the durability of concrete . It is important to note that polypropylene fiber does not replace structural reinforcement , but is an additional means of improving the quality of concrete mixtures.

Advantages of using Astra Belmix fiber

 

  • minimization of shrinkage cracks in the first days of hardening;

  • increasing the tensile strength of fresh concrete;

  • preventing the mixture from separating;

  • increased frost resistance and water resistance;

  • protection of concrete from delamination during fire;

  • compatibility with all chemical additives without changing the mixture proportions.

Where is polypropylene fiber used?

 

Astra Belmix concrete fiber is suitable for all types of cement mortars and concretes, including:

  • floor screeds and self-leveling floors;

  • screeds for "warm floor" systems;

  • thin-layer concrete levelers;

  • plasters and mortars;

  • shotcrete and refractory concrete;

  • concrete products and prefabricated structures;

  • industrial floors, including those with steel fiber reinforcement.

Astra Belmix fiber consumption rates

 

The recommended dosage depends on the area of application:

  • 0.3–0.6 kg/m³ – mortars, plasters, foam concrete;

  • 0.6–0.9 kg/m³ – screeds, floors, industrial coatings;

  • 1.8–2.0 kg/m³ – for fire protection and shotcrete.

Technical specifications

 

  • Material : polypropylene

  • Fiber shape : round, straight, chopped

  • Color : white

  • Length : 6 mm, 12 mm, 18 mm

  • Diameter : 0.034 mm

  • Tensile strength : 350–390 MPa

  • Density : 0.91 g/cm³

  • Melting point : over 160°C

Packaging and use

 

Fiber is supplied in cellulose or polyethylene bags of 0.6 kg and 0.9 kg , which is convenient for dosing. A box contains 28.8 kg, a europallet - 432 kg.

Fibers can be added to the concrete mixer without additional equipment. It is best to add fiber to the aggregates before cement and water. When dosing more than 1 kg/m³, the use of superplasticizers is recommended to maintain the required consistency.

 

Astra Belmix polypropylene fiber for concrete is a reliable solution for preventing shrinkage cracks, increasing the strength, frost resistance, and durability of concrete structures.

If you need fiber for screed, plaster or industrial floors , Astra Belmix will be the optimal choice.