Basalt Chopped Fibers for Polymers and Concrete
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Basalt Chopped Fibers can be mixed directly into polymers and concrete to increase tensile strength, reduce cracking and chipping.
Perfect for mortar and concrete reinforcement applications; all decorative applications as countertops, fireplace surrounds.
Basalt Fiber has a similar chemical composition as regular glass fiber but Basalt Fiber has better strength characteristics, and unlike most glass fibers is highly resistant to acidic and salt attack and alkaline, making it a good option for concrete, bridge and shoreline structures.
Compared to carbon and aramid fiber, Basalt Fiber has the features of wider application temperature range -452° F to 1,200° F (-269° C to +650° C), higher compression strength and higher shear strength, radiation resistance and higher oxidation resistance
Diameter is 17 microns
Fiber lengths are available in 12 mm, 18 mm and 24 mm / .47", .70", .94"
Various sizings are available for compatibility with a wide range of
resins, concrete, and water-based adhesives
Fibers are completely resistant to the effects of the alkali in concrete,
and require no special coatings for concrete use
Fibers resist cold down to -260 degrees F, and heat up to 1,500 degrees
Fibers do not conduct electricity or induce electrical fields
Fibers do not absorb or wick water into reinforced structures
Fibers significantly improves the shock resistance of concrete
Ductility index of basalt fiber reinforced concrete increases by a
factor of 2~4.
The addition of basalt fiber can effectively increase the compressive
strength, splitting the tensile and flexural strength (especially splitting
tensile and flexural strength) of the concrete; values of 9.9%, 37.5% and 44.2%
Crack impact cycle number of the concrete improves by 60%~ 170%, the
impact energy improves by 90%~ 260%, and the ductility index increases by a
minimum of two times, compared with ordinary concrete
Basalt Fibers advantages:
- Stronger than fiberglass in tensile
- Non-respirable, inert and safe to
- 27% better elastic modulus
- UV immune
- Will not harbor bacterial or
- Better impact resistance, does not
shatter like carbon fibers
- Ten times better electrical
insulator than fiberglass
- Very resistant to aggressive
liquids, acids and alkalies
- Great sound attenuation properties
- Replacement for asbestos in
frictional material applications
- Over twice the strength retention in
elevated temperatures than E-glass reinforced applications; better and more
stable frictional coefficient and longer life
- Higher sound insulation properties
than e-glass fibers.
- Lower heat transfer coefficient than
e-glass and carbon with greater thermal insulation properties
- Low coefficient of thermal
expansion; approximately the same as concrete
How are Basalt Chopped Fibers made?
Qualified* basalt rocks are broken
into small pieces, washed, then melted in 1,888-degree F furnaces. The melted
rock is drawn down through special bushings to make fiber filaments. The fibers
are then chopped into various sizes. Coatings are applied to make the fibers
bond to concrete or resins. All-natural rock basalt fibers are safe,
non-respirable and do not burn. *Not all basalt is equal! The basalt has to
have the right combination of silicate minerals.
Basalt fiber dosage
Regular concrete mix
We recommend 6-8 pounds of basalt chopped fibers per cubic yard of concrete.
GFRC concrete mix
Fiber content varies but is generally approximately 3% to 7% of the cementitious material weight or 1% to 3% by total concrete weight. Increased fiber content adds strength but decreases workability.
Common water to cement ratios used from 0.25 to 0.35. (25-35% by cementitious material weight)