TECHNICAL PROPERTIES
 
 

GFRC is a concrete, mixed with cement and sand, strengthened by special alkali-resistant glass fibers. Higher cement content and lower permeability have made GFRC much more resistant, strong and long lasting in comparison to the highest quality standard concrete against exterior factors. GFRC also has a great design flexibility advantages due to use of molds which can be any desired form and surface texture.

Mechanical Characteristics: Physical Properties of Glassfiber Reinforced Concrete

Property
Abbr.
Unit
PREMIX
SPRAY
Compressivestrength
fc
N/mm²
40 - 60
50 - 80
Tensilestrength
fet
N/mm²
 
5 - 10
Limit of Proportionality
LOP
N/mm²
5 - 7
6 - 10
Modulus of rupture
MOR
N/mm²
8 - 12
15 -25
Ultimate strain
еu
0.5 - 4
Impact resistance
-
KJ/
10 - 15
10 - 25
Modulus of Elasticity
E
kN/mm²
10 - 20
10 - 20
Density
y
kg/dm³
1.9 - 2.0
1.9 - 2.1
Thermal expansion coefficient
αT
/C
(1.0 - .5) x 10
( 1.0 -1.5 ) x 10
Thermal conductivity
λ
W/mk
0.8 - 1.2
0.8 - 1.2
Fire rating according DIN 4102
-
-
A l - A2
A l - A2
Shrinkage value
εcs
mm/m
 
1.0 - 2.0
Swelling value
K
mm/m
0.5 - 1.0
Water absorption
-
%
3 - 15
Water vapor diffusion
μ
-
50 - 200

Thermal Conductivity

0.5-1.0W/sqm C at 2000kg/cu.m density

Water permeability

GFRC is a material that has a higher resistance against water and other liquids.750mm water pressure was applied to the surface of a GFRC sheet of 100mm thickness for a three months period. At the end of this period, there was no moisture on the back side of the GFRC sheet. The GFRC sheet of 6-10mm thickness is less permeable then conventional concrete of 50mm

Abrasion Values

A GFRC sheet of 10mm thickness lost a 1mm layer when a speedy erosion test of 60 years is applied

 
Weight Loss (g/m²)
Relative Weight Loss
GFRC
7.5
100
Conventional Concrete
40.0
533

Sound Insulation

GFRC components, being thin-walled, posess little sound absorption .Sound insulation is achieved through appropriated layering.

 

Fire Resistance

Stability and integrity is preserved and flame dose not penetrate in to the structure. The heat cannot exceed 140 ∞C to the protected side.

 

Wind Pressure: W=100kg/sqm

GFRC sheet of 8mm thickness 0.80m

GFRC sheet of 12 mm thickness 1.10 m

Production Thickness

Production of panel 8-10 mm 16 kg-20 kg/sqm

Decorative products 12-15 mm 24 kg-30 kg/sqm

Environment and health

The conditions related to environmental capability for cement admixtures and additives are the same as those for concrete. No pollutants are liberated during the entire life cycle of GFRC, Until ultimate disposal. The environmental comp atibility is therefore ensured, subject to adherence to usual measures. If organically structured additives are used, the limit values in the national codes of practice must be observed.

The 13mm glassfiber used in GFRC is considered non-harmful to health.

It has been proven that fiber with diameter of less than 3um are hazardous. Fiber of such diameters and less are capable of been suspended in the air.

Even when glassfiber reinforced concrete is mechanically processed e.g. by

By sawing, drilling, grinding, this will not cause the glassfiber to split up into thinner fibers. Therefore any of the typical equipment may be used in processing the material, even after hardening when the instructions specific to the equipment used are observed.

 
 
 

 

 
 
Fibrocon Precast, Inc.
 
 
6205 McIntosh Rd, Sarasota FL, 34238
 
 
Phone: 941-921-9750 Fax: 941-921-6395