seminar basalt fiber rebars

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BASALT FIBER REBARS

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Basalt rebar is a bar with continuous spiral ribbing

formed by means of winding by basalt strip. Basalt rebar got a wide range of

application in construction.

INTRODUCTION

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Resistant to corrosion and aggressive chemical compounds, is extremely light and durable.

Long life of structures.

CONT….

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They are cheaper when compared with other fibers such as S-glass, carbon or aramids .

They are superior to steel rebar in many ways but also remain cost competitive with steel, perhaps even costing less in some applications.

The high tensile strength of BFRP allows engineers to switch project requirements from #4 steel rebar to #3 BFRP, allowing additional cost savings.

SCOPE OF BASALT REBARS

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RAW MATERIAL

Basalt rock is used as raw material. It is a common volcanic rock found throughout the world. The basalt usually exists as thick slabs. It is used as a road base ,used instead of lime as common base for construction

MANUFACTURING

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Fiberization Pultrusion Basalt rebars

MANUFACTURING

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CRUSHING

MELTING

DRWAWING INTO

FILAMENTSSTRETCHING

COOLING

SEIZING WINDING

FILAMENTS

FIBERIZATION

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FIBERIZATION First step is production of  basalt continuous filaments.

Basalt rock is crushed into small pieces(.

Rock is melted in large furnaces.

Molten rock is drawn into thin filaments.

Through special fixtures (brushings) of platinum and

rhodium.

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Drawing is done by high speed winders.

It is stretched massively , reducing the dia by 90%.

Fiber is cooled from liquid state to solid glassy state(amorphous solid).

Cooling is done with mist and brushing with liquid on it.(water or sizing which enhances the adhesion ).

Filaments of diameter between 9 and 22 microns are produced.

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1) crushed stone silo.2) loading station.3) transport system.4) batch charging station.5) initial melt zone.6) secondary heat zone with precise temperature control.7) filament forming bushings.8) sizing applicator.9) strand formation station.10) fiber tensioning station.11) automated winding station.

FIBERIZATION

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A• RESIN BATH

B• PULLEDTHROUGH HEATED

DIE

C• CUT INTO DESIRED LENGTH

PULTRUSION

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Basalt filaments are turned into rebars using pultrusion.

Creel of fiber spools being pulled into resin bath.

Fibers are pulled through heated die.

Pulling process is controlled by pullers or tractors.

Sawn into lengths by inline saw.

PULTRUSION

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PULTRUSION

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Low weight: 4 times lighter than steel rebar

More than two times stronger than steel rebar Corrosion and putrefaction free

Unique chemical resistance

Good dielectric

Low heat conductivity

PROPERTIES

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BFRP has a much lower modulus of elasticity than steel rebar

Tensile strength - not less that 1000 Mpa

Resistance to rapid temperature drops.

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ADVANTAGES Low specific weight: 4 times lighter than steel rebar.

Resistance to corrosion, rotting, and warping

Unique chemical resistance (potash environment, hydrochloric acid, alkali, sea water and other aggressive environments)

Low thermal conductivity

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Can be used over a temperature of -260/200-650/800

Long overhaul period for constructions.

Considerably lower maintenance and repair expenses

Higher operational reliability and long life of constructions and products

Lower expenses for transporting constructions and elements of constructions to the place of installation due to lower weight of the product

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Inability to Bend in the Field.

Longer Load Transfer (Lap) Lengths.

Poor Shear Strength.

DISADVANTAGES

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APPLICATIONS

Highly corrosive conditions. Dry dock Pools Wells Ports Channel pipes Sea line reinforcements

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Walling structures Architectural constructions Fences Columns Modelling with Rebar reinforcements.Road constructions Highways Bridges runways

Investigation on Concrete Beams Reinforced with Basalt Rebars as an Effective Alternative of Conventional R/C Structures ; Marek Urbanskia , Andrzej Lapkob, Andrzej Garbacz

Experimental testing of basalt-fiber-reinforced polymer bars in concrete beams : Fareed Elgabbas, Patrick Vincent, Ehab A. Ahmed, Brahim Benmokrane

A review on basalt fibre and its composites : V. Fiore a, T. Scalici , G. Di Bella , A. Valenza

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REFERENCES

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QUESTIONS???

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