GRC knowledge center

GRC Knowledge Center serves our customers with the information in the field of GRC concrete composites. In this section we will find out what exactly is glass fiber reinforced concrete GRC (GFRC) and what is its purpose. On the basis of research and technical data we will present what is its advantage over other  architectonic materials in this category and what are its properties and composition. For easier assimilation and understanding of the subject, we quote some definitions, which  will help you discover the benefits of our product. We will try to explain what its popularity is based on, and we will try to protect our customers from fraudsters wanting cheaply replace the material GRC with cheap imitations. In this section we also introduce the parameters of GRC concrete and the elements it is made of. In the next section we will suggest how to design an object or item using this material and what the process of its implementation looks like. We will also try to answer any questions regarding the details of the order and the waiting time for the selected GRC product.

Glass fiber reinforced concrete GRC (GFRC) – what is it?

Glass fiber reinforced concrete (Glass Fiber Reinforced Concrete, GRC or GFRC) is currently one of the most modern construction technologies.

High-grade GRC (GFRC) concrete composite is much stronger and a far more durable product than traditionally used architectural and structural concrete. The production phase and a highly sophisticated multi-component recipe, during which there are added alkali-resistant glass fibers to eliminate or significantly reduce the amount of shrinkage cracking mostly occurring in plasters, sprayed layers of repair mortars and other elements of concrete surface, greatly differentiates it from other products of this type. GRC architectural concrete (facing, elevation, decorative and artistic), has  much higher module of elasticity in contrast to the raw materials using polypropylene fibers. This makes it much more sturdy, durable, plastic and easier to form into any solid. Products and architectural elements made ​​by the GRC method compose perfectly with the space surrounding us by creating an aesthetic wholeness. In addition, they have a superior resistance to particularly unfavorable external factors, including low temperatures, sun and all forms of concrete corrosion. Our products are ideal to use in modern both industrialized and aggressive urban and industrial environment.

Parametr Unit Spray method The cast mixture  method Traditional concrete
The content of glass fiber in the concrete (max) % 5% 3% 0%
The density in the dry state g/cm3 1,8-2,2 1,8-2,2 2,2-2,6
Thermal conductivity W/m*K 0,9-1,5 0,9-1,5 1,0-2,0
Thermal expansion X10 -6 / oC 7-12 7-12 10-18
Frost resistance Cykl >250 >250 <75
Suppression of sound (flat plate 9.3 mm) dB 31,2 31,2 31,2
Failure stress (MOR) MPa 20-30 10-14 2-4
The limit of proportionality (LOP) MPa 8-13 7-9 1-2
Young’s Modulus GPa 15-25 13-21 27-35
Failure stress (UTS) MPa 8-11 4-7 1-4
The limit of proportionality (BOP) Mpa 5-7 4-6 1-3
Shearing MPa 8-11 5-7 3-5
Compressive strength MPa 50-80 30-80 15-60
Impact strength kJ/m2 10-25 10-15 0,05
The elastic modulus GPa 10-20 10-20 20-40
Drying shrinkage % 0,6-1,2 0,1-0,2 0.8-1.8