|
Chemical
Analysis:
|
Silica
|
22%
|
|
Sodium
Oxide
|
4,2%
|
|
Potassium
Oxide
|
4,6%
|
|
Calcium
Oxide
|
21,12%
|
|
Melting
loss
|
17,9%
|
|
Ferric
Oxide
|
3,42%
|
|
Alluminium
Oxide
|
14,6%
|
|
Magnesium
Oxide
|
6,3%
|
Laboratory
tests:
|
Absorption
Rate
|
0,23%
|
|
Absorption
rate through capillarity
|
0,109%
|
|
Maximum
tensile strength/compressive strength
|
1,474
Kg/cm2
|
|
Maximum
tensile strength/compressive strength after freezing
|
1,276
Kg/cm2
|
|
Freezing
test
|
Does
not freeze
|
|
Maximum
tensile strength/sheer flexural strength
|
292
Kg/cm2
|
|
Resistance
against impact
|
Greater
than cms 40
|
|
Thermo-linear
expansion rate
|
0,0055
mm/m°c
|
|
Wear
and tear caused by sliding friction
|
0,39
mm.
|
|
Micro
toughness–knoop indentation test
|
85
Kg/mm2
|
|
Loss
of weight with sulphuric acid
|
0,06%
|
|
Modulus
of elasticity
|
620.000
Kg/cm2
|
|