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FRP vs GRP: Difference between FRP and GRP

FRP stands for fiber-reinforced plastic while GRP stands for Glass reinforced plastic. So, from the name, it is clear that there is a change in the reinforcing fiber. But, both FRP and GRP are normally used to indicate the same plastic products.

It is a material that is made up of a polymer matrix reinforced with fibers.

Thermoset Resin
  • Provides the Chemical Resistance
  • Holds the fibers in place
Glass Fibers
  • Provides Strength and Stiffness

(FRP/GRP) is a strong composite material that is defined as a polymer that is reinforced with fiber. It represents a class of materials that fall into a category referred to as composite materials. It consists of woven or stitched, unidirectional, carbon and glass fiber fabrics and impregnating resins.


Fibers can be sourced from glass, carbon, aramid and other sources. It is vital to ensure that the fiber source of fiber-reinforced plastic suits the application that it is to be used in. This unique combination makes this a multifunctional material for many applications including confinement, shear, and seismic upgrading and strengthening of weak concrete, masonry, natural stone and timber structures.

It is commonly used in industries such as aerospace, construction and marine to build structures that require added resistance to force in order to prevent deformation. Fiber-reinforced plastic is useful in terms of corrosion protection because it helps in preventing corrosion due to force application and deformation such as stress corrosion cracking.

Fibre-reinforced plastic may also be known as Fiber-reinforced polymer.

Why FRP ?


FRP composites are different from traditional construction materials like Steel and Aluminum. FRP composites are anisotropic whereas Steel and Aluminum are isotropic. Therefore, their properties are directional, meaning that the best mechanical properties are in the direction of the fibre placement.

These materials have a high ratio of strength to density, exceptional corrosion resistance and convenient electrical, magnetic and thermal properties. However, they are brittle and their mechanical properties may be affected by the rate of loading, temperature and environmental conditions.

The primary function of fibre reinforcement is to carry the load along the length of the fiber and to provide strength and stiffness in one direction. It replaces metallic materials in many structural applications where load-carrying capacity is important.

The use of FRP in engineering applications enables engineers to obtain significant achievements in the functionality, safety and economy of construction because of their mechanical properties.

SIX MAIN ADVANTAGES OF FRP

  • LIGHT WEIGHT
  • SUPERB CORROSION RESISTANCE
  • EXCELLENT THERMAL PROPERTY
  • SUPERIOR DESIGNABILITY
  • NON-TOXICITY & ANTI-AGING
  • LONG SERVICE LIFE