Basalt Rebar

General Description:

Basalt rebar is made up of volcanic rock (Basalt rock) melted at high temperature. Basalt rebar is acts as an alternative for steel and fiber glass rebar. The weight of the basalt rebar is reduced to 12% weight of steel rebar. It has high tensile strength when compared with steel rebar. Basalt rebar will not absorb water and it will not get rusted. Hence the thickness of the concrete section will be reduced. Basalt rebar can be used in the rough environments like Marine areas, Chemical plants etc. Basalt rebar is natural alkali resistant. Basalt rebar is nonconductive and non magnetic. It helps to prevent electrolysis in any kind of hydraulic structures like dams and harbors.

Chemical Properties of Basalt Rebar:

Basalt 80%, Epoxy 20%, Dacron and Sand

SiO₂ – 53%

Al₂O₃ – 17%

Fe₂O₃ – 10%

CaO – 8.5%

MgO – 4.5%

Na₂O – 3.3%

K₂O – 1.5%

TiO₂ – 1.4%

Other – 0.8%

Method of Preparation of Basalt Rebar:

Basalt rebar is purely a green product. Basalt rocks are crushed into finer pieces and the rocks are melted in high temperature furnace. The molten rock is then drawn into fibers using platinum and rhodium fixtures. The fibers are then drawn to a stretching process to reduce its diameter. High speed winders accumulate the fibers into a single space. The molten rock needs to be cooled in between the bushing and winders to form a solid glassy state (Amorphous solid). Finally to enhance the adhesion of fibers it has been brushed using the chemical formula called Sizing.

Physical Properties of Basalt Rebar:

Density – 2.7 g/cm³

Tensile Strength – 38 to 4800 MPa

Elastic Modulus – 93 to 110 GPa

Elongation at break – 3.1%

How to overcome Tensile Modulus issues?

Basalt are normally strong in both tension and compression zone of concrete structures. In case of any tensile issues due to higher building requirements it can be solved by adding basalt more for finer diameter nos. Thermal coefficient of expansion for Basalt rebar is same as the concrete.

Basalt Rebar Packaging:

Basalt comes in 39 feet 6 inches of length or of 500 feet long continuous coils. A man can lift 500 feet long of 10 mm diameter coils easily. Basalt rebar can be easily cut. These rebar are not ductile. It cannot be bend. While uncoiling greater care should be taken. It should be done from inside. To protect Basalt rebar prolonged storage in direct sunlight should be avoided.