Properties of GRC

The final properties of a particular type of GRC material depend on the mix design and the manufacturing method. Typical properties for GRC materials made using the Sprayed and Premix processes are presented in the table below.

Technical Data

Parameter	Unit	Spraying Method	Method of casting mixture
The content of glass fiber in the concrete (max)	%	5%	3%
The density in the dry state	g/cm3	1,8-2,2	1,8-2,2
Thermal conductivity	W/m*K	0,9-1,5	0,9-1,5
Thermal expansion	X10 -6 / oC	7-12	7-12
Frost resistance	Cycle	>250	>250
Suppression of sound (flat plate 9.3 mm)	dB	31,2	31,2

Bending	Unit	Spraying Method	Method of casting mixture
Failure stress (MOR)	MPa	20-30	10-14
The limit of proportionality (LOP)	MPa	8-13	7-9
Young’s Modulus	GPa	15-25	13-21

Expansion	Unit	Spraying Method	Method of casting mixture
Failure stress (UTS)	MPa	8-11	4-7
The limit of proportionality (BOP)	MPa	5-7	4-6
Shearing	MPa	8-11	5-7

Compression	Unit	Spraying Method	Method of casting mixture
Compressive strength	MPa	8-11	4-7
Impact strength	kJ/m2	10-25	10-15
The elastic modulus	GPa	10-20	10-20
Drying shrinkage	%	0,6-1,2	0,1-0,2

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