Composite technologiesResearches

Basalt fiber composite reinforcement for concrete

An adequate number of laboratory and bench-scale tests to evaluate the feasibility of using basalt fiber as concrete reinforcement have been performed and relative advantages evaluated.

The main activity of Global Basalt Engineering LLC is creation of effective productions on release of continuous basalt fiber (СBF) with technologies of the last generation and composites on the basis of СBF (Basalt Fiber-Reinforced Polymer Composites as BFRP).

Continuous basalt fibers, 7µm-15µm in diameter, exhibit exceptional mechanical characteristics (tensile strength, modulus) in combination with excellent flexibility and chemical stability in cement and alkaline media. The epoxy-bonded pultrusion basalt-fiber composite containing 80% fibers (9µm-15µm in diameter) provide mechanical characteristics superior to those of glass-fiber reinforced composites currently available in the U.S.

Under optimum conditions (resin, fiber content, fiber direction, dimension, etc.), standard basalt-fiber composite specimens containing roving RB12, produced by RTM, show tensile strengths and moduli of elasticity twice that of E-glass fiber composite.

Basalt-fiber composite rod (rebar) could potentially replace steel bar in reinforced concrete, providing higher strength and durability in areas where corrosion is a problem. Tests of the mechanical characteristics of basalt fiber-reinforced concrete specimens have been provided. Concrete reinforced with 7%-10% coarse basalt fiber and concrete extruded from the mixture of Portland cement with 3vo continuous basalt fibers 7µm in diameter (chopped roving fibers 50mm-70mm in length) appear to have a higher level of strength, modulus and flexural properties than conventional and glass-fiber reinforced concrete.

Vladimir B. Brik, Research & Technology, Inc. Madison, Wisconsin.



Industries: Construction

Technologies: Pultrusion

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