Dupré Vermiculite Technical Data
 

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Vermiculite information

What is Vermiculite?

Crude Vermiculite

Exfoliated Vermiculite

Material Health & Data Sheet
 
 
 
EXFOLIATED (EXPANDED) VERMICULITE
Specific Surface Area: The specific surface area for exfoliated Vermiculite as measured by the nitrogen absorption technique, is typically:
 
Specific Surface Area m2/g
Micron 7.7
Superfine 5.9
Fine 5.0
 
 
Thermal Conductivity: 0.062 - 0.065 W/mēC under ambient conditions
 
Chemical Analysis: The chemical analysis of exfoliated and crude vermiculite are similar, see above.
 
Absorption Capacity of Exfoliated Vermiculite:
 
The graph shown here gives an indication of the quantity of liquid which can be retained using expanded vermiculite before drainage of the liquid occurs.

Absorption Capacity of exfoliated Vermiculite -Dupre DSF Grade

 
 
  Cumulative Percentage Finer    
 

Sieve (mm)

DL/Micafil

DM

DF

DSF

DMicron

8.0

93

-

-

-

-

5.6

-

99

-

-

-

4.0

32

92

-

-

-

2.8

-

-

99

-

-

2.0

4

27

86

-

-

1.7

-

-

-

-

100

1.4

-

-

-

94

-

1.0

-

6

30

53

97

0.5

-

-

7

10

45

0.2

-

-

-

3

-

0.18

-

-

-

-

6

Kg/m3

64 - 80

72 - 88

88 - 112

104 - 144

104 - 160