Materials that NIISV is able to produce or able to make technology transfer

Continuous basalt fiber

 

Application:

a.       Geotextiles (nets, linens) for reinforcement of paving and roads, reinforcing of embankments, land banks;

b.      Reinforcing materials for concrete constructions (basalt plastic reinforcement, chopped basalt fibers, basalt reinforcing nets)

c.       Structural fabrics for fiber glass plastics

d.      Electro- insulating linens for manufacturing of electronics components – boards,  for electrical industry

e.       Chopped fiber mats for fiber glass plastics

f.        Linens, canvases with longitudinal reinforcement for soft roofing

g.       Materials for underground pipeline repair

h.     Chemically resistant pipes

 

Properties

1.      Thermal limit of application, C                                 -200     +600

2. Density, kg/m3                                                          2800

3. Elasticity modulus, kg/mm2                                        9100…1100

4. Stability at tension(after 1 hour thermal treatment), %    

                                                         200C                  100

                                                         2000C                  94

                                                         4000C                  65

5. % weight lose after boiling during 3 hours in

                                                         H2O                     0.16

                                                 2N NaOH                    5.0

                                                 2N HCl                        2.1

6. Specific volume electrical resistance, Ohm.m             1*1013

7. Normal coefficient of sound absorption                     0.9…0.99

 

General properties of CBF in comparison with E-glass fiber.

 

CBF has  higher application temperature:

up to 550 0C in rovings and linens;

up to 600 0C in non-wovens.

This lets them to be applied in thermo- and sound- insulation.

Tensile strength modulus of CBF is 1.3…1.45 higher than that of E-glass fiber. Under special treatment it is possible to increase strength of CBF for 10-15%.

This lets them to be applied in basalt plastics, reinforcing nets, basalt plastic reinforcements.

CFB has better alkali, acid stability, as the most stabile natural raw material is used.

This property allows to use CBF in reinforcing of concrete, in reinforcing linens and nets for construction, in geo-textiles for reinforcing of pavements, landing strips, for strengthening of land slopes (open mines, ravines, terricons).

Presence of Fe oxides is not reducing it electro-insulating properties in comparison with fiber from E-glass.

So it is possible to produce electro- insulation.

Specific density of CBF is 1.3 higher than that of fiber from E-glass.

 

Basalt fiber geotextiles (reinforcing linens and nets)

 

Geotextiles are widely used in way construction. Applied geotextiles for reinforcing way coverings are highly durable. Geotextiles are widely used in reinforcing of slopes, ways, embankments, dams, in revegetation (of ravines, open pits, etc), erosive protection of lands, antilandslides etc. Geotextiles made by conquers are made of chemical and glass fibers using special impregnation solutions.

Because of tightening market requirements NIISV developed own geotextiles and launched the manufacture of: basalt fiber linen NP-550 (needle – sewed linen, density 550 g/m2); PSB-D ( netted basalt linen for road construction). Application:

reinforcing of road coverings (PSB-D laid between macadam pour and asphalt concrete coat, NP-550 laid between macadam and sand pours)

for reinforcing of embankments, slopes, waste banks, antilandslides, erosive protection, recultivation etc. Through net PSB-D, that is laid on the land surface  and fixed, grass, trees and bushes grow. Such a reinforcing method is the most effective and meet the most strong ecological requirements, non-pollute.

The basalt fiber geotextiles have a number of advantages: they are made of natural raw material (natural chemical composition provides chemical stability and resistance), non-inflammable, can carry out distributed load, the cost is 4-5 lower.

Performances of materials:

PSB-D

Braking load (not less than), kN                      edgewise                     30

                                                                       Longwise                     20

Density, gr/m2                                                                                     350

Impregnation with special composition K( provides even higher durability and stability)

NP-550 K

Braking load (not less than), kN                      edgewise                     2.2

                                                                       Longwise                     1.2

Density, gr/m2                                                                                     550

Impregnation with special composition K

The tests were operated by UkrDorNII (UkrRoadScienceResearchInsitute). The materials were used in section of highway Kiev- Odessa. The test confirmed the effectiveness of the applying. Preliminary calculations and gained experience shows that the geotextiles reduce the probability of cracking, slumping, holes, pits on road coat; the durability is 1.5-2 times higher. The reinforcing materials have no analogs in Ukraine.

 

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last updating of September 2004