FIBER CEMENT SYSTEMS



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.

Alkali Resistant Fiber (AR or ARG)

Alkali Resistant Fiber (AR or ARG) – is resistant to alkaline environment of water reactive cement. The higher the content of zirconium in the glass fibers, the better the resistance to the effects of alkaline hydration products of Portland cement it has . They have completely replaced carcinogenic asbestos fibers.

Glass Fiber Reinforced Concrete GRC or GFRC

Glass Fiber Reinforced Concrete, GRC or GFRC – is more stable and durable product than traditional architectural and structural concrete. In the first phase of production, the glass fibers are added in order to eliminate or limit the shrinkage cracking occurring mainly in components of the concrete pavement, plasters and sprayed layers of mortar repair. They act in the early stages of concrete ripening, similar to commonly used polypropylene fibers (PP). Glass fibers , in contrast to the polypropylene fibers (PP) have a nature of reinforcing fibers, because their module of elasticity is much higher than the elastic modulus of concrete. For comparison, the Young’s polypropylene fibers (PP) module of elasticity is much lower and amounts to only 5 GPa, yet the glass fibers allow to obtain a Young’s modulus at 25 GPa level.

GRC concrete (GFRC) facade/lining panels.

Technical Data

Parameter

Unit

Spraying Method

Method of casting mixture

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

Cycle

>250

>250

<75

Suppression of sound (flat plate 9.3 mm)

dB

31,2

31,2

31,2

Bending:

 

 

 

 

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

Expansion:

 

 

 

 

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

Compression:

 

 

 

 

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

Linings and facade panels, are Non-load bearing elevation panels, fixed to the structure by means of bonding systems. An insulating layer may be placed between the plate and the support structure (for PN-EN 14992:2007), available dimensions of the facade panel and lining are:

A)              100 x 50 cm

B)              120 x 80 cm

C)              240 x 120 cm

D)             200 x 400 cm

and higher, depending on design and specifications.

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