Fiberglass rebar properties

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    Composite reinforcement is based on non-metallic rods bonded with special thermoplastic or thermosetting polymers. Fiberglass reinforcement in the construction industry is a advantageous alternative to traditional metal rods. This is facilitated by the excellent properties of composite reinforcement.

    To improve the adhesion of composite rebar to concrete, the bars are made textured, using the spiral winding method, or relatively smooth, covered with fine-grained quartz sand.

    According to the type of raw materials used, composite rods are divided into the following types: fiberglass, basalt-plastic, carbon fiber, aramid-plastic. The most common type is fiberglass.

    Main properties of fiberglass GFRP rebar:

    • Corrosion resistance. Composite rebar is very resistant to corrosion processes. Strength characteristics of fiberglass rebar do not change when used in an alkaline or other aggressive environment.
    • Composite rods do not conduct electric current, so they are actively used in the construction of research stations, laboratories and medical centers, where magnetic resonance imaging devices are located. Unlike fiberglass, metal fittings can interfere with the performance of different devices.
    • Fiberglass rods are 8 times lighter than metal ones. This property reduces the overall weight of the structure and the load on the foundation. Also, the low weight simplifies the process of installation and transportation of fiberglass rods. Composite rods with a diameter of less than 12 mm are supplied in coils, so it can be transported even in a passenger car.
    • High strength. The strength of fiberglass reinforcement is several times higher than the one of steel. Composite rods can withstand 3 times more longitudinal loads.
    • Temperature resistance. Fiberglass reinforcement can withstand temperature changes, ranging from -70 to +100 °C.
    • Low thermal conductivity. When using fiberglass reinforcement, cold bridges are not formed, which improves the thermal insulation parameters.
    • The expansion coefficient is the same as that of concrete. Due to this property, stress and cracks do not occur inside the concrete structure due to changes in temperature.
    • The service life is more than 80 years.

    Fiberglass rebar applications

    Composite rebar is used:

    • for reinforcement of foundation slabs of low-rise buildings;
    • for reinforcement of the tape foundation;
    • to build side walks around the house;
    • to strengthen the bases or load-bearing walls;
    • to strengthen the coastline;
    • to strengthen the roadway;
    • for the construction of low-rise structures.

    The diameter of rebar is selected according to the purpose of use. For example, rods with a diameter of 4 mm are suitable for making a mesh, and bars with a diameter of up to 30 mm are selected for reinforcing the frame of load-bearing structures.