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Home Georgian Technologies Production of Glass Fiber Reinforced Concrete

Production of Glass Fiber Reinforced Concrete


Glass fiber reinforced concrete (GRC) is essentially a Portland cement-based composite with short glass fibers that are normally randomly distributed throughout the material. It has been widely used in the construction industry for non-structural elements, especially in facade panels (about 80% of the GRC production). In the early years of the GRC development one of the most concerning problems was the durability of glass fibers, which became fragile with time, especially because of the alkalinity of the cement mortar. Since then, significant progresses have been made, with the development of new types of alkali resistant (AR) glass fibers. AR GRC is well known for its high mechanical properties, compared to plain concrete or even steel reinforced concrete, but additional reinforcement of concrete with AR glass fiber textile allows us to increase not only the tensile and impact strengths, but also drastically improve materials bending properties.

Innovative Aspect and Main Advantages

The main advantages of AR GRC in comparison to plain concrete, plastic or steel are as follows:

  • Higher flexural strength, tensile strength and impact strength than plain concrete due to the presence of the glass fiber;
  • Fibers are lightweight that minimizes the load added to existing structures;
  • Improved chemical resistance, for example it has better chloride penetration resistance than steel;
  • It does not rust or corrode;
  • Improved shrinkage properties over plain concrete;
  • It is environmentally friendly.

The main innovation of our project is that we started producing manholes from GRC, with these advantages in mind, manholes produced from AR GRC are ideal replacement for classical iron cast and plastic ones.

Drainage covers.
Fig. 1 Drainage covers.

Areas of Application

AR GRC is widely used in civil and industrial engineering, namely for production of cable troughs, building facades (as backing mix) and lightweight architectural claddings, footbridge beams, etc.

  • GRC in Architecture: Cladding, Features and Mouldings, Landscaping
  • GRC in Building: Roofing, Walls and Windows, Renovation, Foundations and Floors, Modular Building
  • GRC in Engineering: Permanent Formwork, Utilities, Acoustics, Bridges and Tunnels, Water and Drainage

Manhole covers.
Fig. 2 Manhole covers.

Stage of Development

The technology is developed, laboratory tested and ready for massive production. Patenting documents are under preparation stage. Search for partners for further cooperation is continued.

Contact Details

Georgian Technical University, Scientific Center of Fiber Reinforced Composite Materials
77, Kostava st. Georgia, Tbilisi
Contact person: Prof. David Nozadze
Tel: (+995 32) 36 5385
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it


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