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COARSE FIBERS FROM ROCKS
Fibers receive from basalts and andesite-basalts melts in the form of three marks:
Characteristics coarse fibers
The name of parameters | Mark I | Mark II | Mark III |
Diameter, micron | 80-150 | 151-250 | 251-400 |
Breaking strength, MPa, not less | 200 | 150 | 80 |
Chemical stability, %
H2O
0,5 N Na OH
2 N Na OH
| | 99,5-99,8 96,2-99,8 91,8-96,2 | |
Coarse fibers possess not only low hygroscopic property, but also minimal water-retentive ability.
In comparison with glass, coarse fibers have greater vapor-water-alkali resistanc and more a heat of application.
Fibers are developed for disperse reinforcing concrete, ferro-concrete and asbestos-cement building products and
designs in industrial and rural construction.
Scope of fiber reinforcing:
- Concrete floors, runways of the airports, high-speed motorways;
- Industrial floors in shops where the heavy equipment is established;
- Internal reinforcing of tunnels and channels, strengthening of slopes;
- Repair and reconstruction of constructions;
- Concrete water channels, fireproof designs;
- Military constructions, aseismic buildings and constructions.
Advantages of the concrete reinforced by basalt fibers:
- The total cost of construction of tunnels Decreases;
- Thickness of a concrete layer can be reduced up to half of layer from usual concrete;
- Terms of construction decrease in connection with absence of necessity to establish a wire grid;
- In collectors and underground water channels thickness of a concrete covering essentially decreases, and terms of construction shorter;
- Necessity for reinforcing concrete floors disappears, owing to application of a fibre, and in this case terms of construction decrease twice;
- Cost of repair and service essentially decreases, owing to durability of the concrete reinforced by a fibre;
- Fatigue durability of the concrete reinforced by a basalt fibre Increases;
- At reinforcing concrete, shock durability increases approximately in 20 times, fibers provide three-dimensional hardening concrete in comparison with traditional armature which provides two-dimensional hardening;
- Fibers are not subject to electrochemical corrosion, unlike usual and the cathodic effect can test armatures which is an electric conductor.
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