1. What is fiber?

Fiber is a segment of the complex fiber of a given length. The most popular fiber types on the market are basalt, steel, polypropylene, copolymer, fiberglass.

2. What is basalt fiber made of?

Basalt fiber is made of environmentally friendly natural material basalt. No impurities and compounds are added to the basalt stone melting process.

3. What are the fiber lengths and what length for what use is recommended?

We produce basalt fiber of the following lengths: 5 mm, 12 mm, 24 mm, 36 mm, 50 mm, 60 mm, 100 mm. In the construction industry the most commonly used fiber is 5 mm, 12 mm, 24 mm; in the composite area – 5 mm and 12 mm.

4. What is a sizing type?

In the manufacturing process of fibers, monofilaments are lubricated with special auxiliary materials, so-called lubricants. In the manufacturing process, the basalt fiber is lubricated with two types of lubricants: technological and direct. The technological lubricant is used in order to give each monofilament a smooth surface and fill in any voids. The task of direct lubricant is to ensure the bonding of monofilaments in segments and to guarantee the maximum adhesion of fibers to the components of the environment, as well as the removal of moisture and air from the concrete mixture. Our company uses the silane-based lubricants.

5. How to choose the right kind of fiber for a particular application?

We provide advice and technical support to all our clients. We share the practical experience of our partners, as well as confirm it with the test reports conducted in higher education institutions, scientific structures, accredited laboratories, etc.

6. What are the benefits of using basalt fiber.

Basalt fiber is a unique reinforcing environmentally friendly material that improves the properties of the final product when used correctly, ie the properly selected length, sizing type, and quantity.

7. What are the benefits of adding fiber to concrete?

Basalt fiber in concrete helps to prevent the appearance of microcracks, increase the strength of concrete, increase the durability of the structure and guarantees economic benefits.

8. How much fiber should I add to concrete?

The amount of fiber to be added to the concrete depends on the purpose you have. If the task is only to remove the microcracks, then 1 kg per m3 of concrete will suffice. If you want to increase the strength of concrete, then the amount of fiber depends on the concrete grade that you use: the higher concrete grade, the more fiber should be added in order to get the desired result. It is worth remembering that there is a point of saturation of concrete with fiber, that is, adding a large amount of fiber will not make any sense as growth will cease. In more detail, we consult each client individually, taking into account all the factors of the case.

9. How to mix fiber in concrete?

We recommend to mix the fiber in the dry condition with other inert components (sand, cement, gravel). In this case, we recommend to increase the mixing time of the concrete mixture by 10-15 seconds. The water should be added only after the mixture is evenly mixed.

10. Do I need to cut fiber from the concrete surface?

Basalt fiber, unlike metal fiber, does not require extra labor for cutting from the surface, and polishing of basalt reinforced concrete.

11. How is basalt fiber supplied to the customers? What is the standard packaging?

Basalt fiber is supplied in 20 kg plastic bags that are packed in big bags or boxes. Packaging may be changed by customer order. We take care of the comfort of each client.

12. What are the advantages of basalt fiber compared to steel and polypropylene?

Basalt fiber guarantees three-dimensional reinforcement of concrete, it does not settle on the lower layers of concrete, as steel fiber does and does not rise to the upper layers, such as polypropylene. Basalt fiber does not corrode, as steel fiber, and it is resistant to the alkaline environment and does not disappear in concrete, as polypropylene fiber does over time.

13. What are the advantages of basalt fiber compared to fiberglass?

Basalt fiber is an environmentally friendly, natural material that is resistant to alkaline (as you probably know not all the types of fiberglass are resistant to such an environment, but the fiber that is stable (CR) is much more expensive.), has greater strength (basalt fiber has 3000-4840 MPa, fiberglass – 3100-3800 MPa), and a wide range of operating temperatures (basalt fiber -260 … + 680, fiberglass -50 … + 350).

14. What are the advantages of basalt fiber over carbon?

Compared to carbon fiber, basalt has a wide range of operating temperatures and a significantly lower price, with close to carbon fiber strengths.

15. What fiber grade is used for foam/gas concrete?

We recommend to use RBR-18-T10/12 for foam/gas concrete

16. What basalt fiber is used in dry mixtures?

For dry mixtures it is recommended to use RBR-18-T10/5 and RBR-18-T10/12.

17. Which fiber is used in high-strength concrete?

We are recommending to use RBR-18-T10/12, based on the positive experience of our customers.

18. What are the benefits of using basalt fiber in asphalt?

Basalt fiber increases fracture resistance, resistance to landslides, resistance to the rut formation, increases the durability of road surfaces.

19. What is roving?

Roving is a continuous, unidirectional, complex basalt fiber wound in a bobbin. Roving can be internal or external, on a cartoon tube or without it.

20. What are the main characteristics for roving?

The main parameters for roving are the diameter of the monofilament, the type of sizing, the linear density (tex), the type of unwinding and the quantity (kg per bobbin).

21. What is basalt rebar?

Basalt rebar is a load-bearing rod with a continuous spiral rib, formed by winding a basalt strip moistened with a high-strength polymer compound. Basalt rebar is a composite material that has unique qualities provided by the basalt fiber.

22. What are the diameters of the rebar?

 We manufacture basalt rebar of the following diameters: 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm.

23. Where can basalt rebar be used?

Basalt rebar is an irreplaceable material for reinforcing structures that work on the ground, as well as in conditions of the aggressive environment (roads, bridges, overpasses, foundations, industrial floors, structural products).

24. What are the restrictions on the use of basalt rebar?

It is worth remembering two limitations in the use of basalt rebar: it cannot be used in load-bearing structures, as there are restrictions on fire resistance, as well as in slabs of overlap, where the length of the slab is more than 3 meters (due to the low modulus of elasticity of the basalt reinforcement).

25. Is it possible to bend basalt rebar?

Basalt rebar at the site can be bent only with industrial dryer, however, it is not desirable to do this, because, at the point of bending, the rebar loses its strength.

26. What are the benefits of using basalt rebar?

Basalt rebar significantly extends the life of the structure, facilitates it, does not require welding, does not require the use of lifting equipment, has a positive economic effect.

27. Is it possible to replace the steel rebar with basalt in all cases?

Not in all the cases, basalt rebar can replace steel rebar. See question 24. Also DSTU-N B V.2.6-185: 2012 “GUIDELINES FOR DESIGN AND MANUFACTURE OF CONCRETE STRUCTURES WITH NON-METAL COMPOSITE REBAR ON THE BASIS OF BASALT- GLASS- ROVINGS” recommends to use steel bent elements in the places where it is necessary and bind it with straight basalt bars.

28. How shall the basalt rebar replace steel reinforcement?

As basalt reinforcement is 3 times stronger than steel reinforcement, it replaces steel not diameter to diameter, but with a certain step, so 4 mm basalt replaces 6 mm steel rebar, 6 mm basalt – 8 mm and 10 mm steel, 8 mm – 12 mm steel, 10 mm – 14 mm, 12 mm – 16 mm, 14 mm – 18 mm.

29. What is the maximum operating temperature of the basalt rebar?

The maximum temperature maintained by the basalt rebar outside the body of the concrete is +180 C.

30. Is it possible to weld basalt rebar?

No, the basalt rebars are joined by plastic clamps or knitting wire.

31. Is basalt rebar sold in tonnes?

Basalt rebar, like other types of composite rebars, is sold in meters.

32. What are the minimum and maximum length of basalt rebar?

We supply basalt rebar from 1m to 12 meters in length.

33. How is basalt rebar packaged and delivered to the facility?

Basalt rebar is packed in packs. Small diameters (4mm, 6mm, 8mm) can be rolled up to the client’s order. Due to the low weight basalt rebar is supplied by any convenient transport.

34. Is it cost-effective to replace steel rebar by basalt?

The economic effect of replacing steel rebar with basalt when properly redesigned is about 30%.

35. What are the regulatory documents governing the use of basalt rebar?

DSTU B.V.2.6-145: 2010 “Construction of buildings and structures. Protection of concrete and reinforced-concrete structures against corrosion. General technical requirements”.

DSTU-N B V.2.6-185: 2012 “Instructions for design and production of concrete structures with non-metallic composite reinforcement based on basalt and glass roving”.

DSTU-N B V.2.7.-312: 2016 “Non-metallic composite basalt rebar of periodical profile”

M 42.1-37641918-759: 2017 “Method of calculation of concrete structures of bridges reinforced with basalt rebar for endurance”

M 42.1-37641918-756: 2017 “Method of calculation of concrete structures of bridges reinforced with basalt rebar against low-cycle loads”

Р В.3.2-03450778-830: 2013 “Recommendations on the use of nonmetallic rebar for the reinforcement of structural constructions of span bridges structures”

Р В.2.3-03450778-846: 2014 “Recommendations on the design of basalt-concrete structures of bridges and pipes“

36. What countries does Technobasalt-Invest cooperate with?

The sales geography of basalt products is very wide. Technobasalt-Invest, LLC supplies its products worldwide.