GRC(GFRC)

WHAT IS GRC (GFRC)

Glassfibre Reinforced Concrete (Sometimes Called Glassfibre Reinforced Cement) is a mixture of cement, fine aggregate, water, chemical admixtures and alkali resistant glassfibres.

There are a number of different manufacturing processes; the most common are Hand-Spray and Premix systems.

Glassfibre Reinforced Concrete (GRC) is a material which today is making a significant contribution to the economics, to the technology and to the aesthetics of the construction industry worldwide.

GRC (GFRC)

  • is environmentally friendly
  • products reduce loadings on buildings leading to significant savings in superstructure and foundations
  • is excellent for reproduction and renovation
  • is easily moulded to reproduce shapes, details and textures
  • is high strength allows design of thin, lightweight cladding elements
  • can be coloured with pigments, paints and natural stone facings
  • cladding can replace non-structural precast concrete where weight and/or shape may be problematic
  • can be cast into fine details
  • offers designers unrivalled flexibility
  • mouldings and features are easy to handle and erect
  • does not suffer from corrosion
  • is durable against extreme weather conditions
  • products are lightweight and easy to handle
  • offers a wide variety of shapes and surface finishes

This environmentally friendly composite, with its low consumption of energy and natural raw materials, is being formed into a great variety of products and has won firm friends amongst designers, architects, engineers and end users for its flexible ability to meet performance, appearance and cost parameters.

Since its introduction in 1969, GRC has matured and today's designer has available to him, depending upon his performance requirements, a range of matrix modifiers such as acrylic polymers, rapid set cements and additives to improve the long term stability of the material. Extensive independent test and performance data are available on all aspects of matrix formulation.

Typical Formulations

material

spray(kg)

casting(kg)

cement5050

fine aggregate

5050
plasticiser0.50.5
polymer55
Water13.514.5
AR glassfibre4.5-5%2-3.5%

 

USES OF GRC (GFRC)

GRC presents architects and engineers with a material from which the most ambitious designs can be created. It can be moulded to form modern futuristic designs or to replicate traditional historic features. GRC can be painted, faced with fine aggregates, coloured or simply left with a natural white or grey, smooth or textured finish.

CLADDING

GRC is one of the most popular materials used for creative prefabricated architectural cladding. GRC’s ability to be moulded into thin, lightweight panels with a wide variety of shapes, forms and surface finishes has been appreciated by a growing audience of architects and engineers worldwide. GRC cladding panels are generally manufactured by the ‘Hand Spray’ technique. As the name implies, the material is sprayed into a mould using special machinery. The method can produce high-performance materials from which panels with extremely thin, lightweight sections are achievable

FEATURES & MOULDINGS

GRC products are formed by a variety of manufacturing techniques. One of the most versatile is to cast the composite in moulds manufactured from rubber, timber or Glassfibre Reinforced Plastic (GRP/FRP). This is known as Premix GRC. As the high-performance alkali resistant glass fibres are evenly distributed in the mix, the material is reinforced throughout, enabling products with the finest of details to be created. RC is used to produce beautiful architectural mouldings and features. Whilst often cast with thicknesses in excess of 25 mm these products remain easy to handle and erect, and permit the architect or engineer an unrivalled freedom for creative design. GRC does not suffer from corrosion of the reinforcement. Unlike traditional concrete, GRC does not require a minimum of concrete cover to the reinforcement.

LANDSCAPING

In building projects, leisure facilities, urban renewals and municipal schemes ever-increasing attention is being focused on the built environment. GRC is playing a major role. Seating, planters, receptacles, kiosks, bollards, signs, statues and fountains, to name but a few, all benefit from being made in GRC with its ability to tailor shape, form and surface finish and to be aesthetically compatible with the chosen environment. GRC also provides theme park and zoological architects with a medium through which they can turn dreams into reality. Many of the world’s largest theme parks and zoos use GRC to create rockscapes, replica buildings, simulated environments for animals, and much more.



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