Technology index
Bentonite quality standard reference GB/T20973-2007 «bentonite»
Physical index
|
items\Type
|
first grade
|
second grade
|
third grade
|
fourth grade
|
|
Green Comp Strength , kpa ≥
|
100
|
70
|
50
|
30
|
|
Dry Comp. Strength, kpa ≥
|
2.5
|
2.0
|
1.5
|
0.5
|
|
MBI,g/100g
|
32
|
28
|
25
|
22
|
|
Mesh(through B.S.S.200 sieve,%,≥
|
85
|
85
|
85
|
85
|
|
Moisture %
|
9~13
|
9~13
|
9~13
|
9~13
|
Chemical content
|
Ingredients
|
%
|
Sodium Bentonite
|
Ca-bentonite
|
|
sio2
|
%
|
69.32
|
67.23
|
|
AL2O3
|
%
|
14.27
|
15.88
|
|
Cao
|
%
|
1.99
|
2.22
|
|
Mgo
|
%
|
2.69
|
4.01
|
|
K2o
|
%
|
1.38
|
0.19
|
|
Na2o
|
%
|
1.85
|
0.13
|
|
Fe2o3
|
%
|
1.84
|
2.62
|
|
Feo
|
%
|
0.63
|
0.03
|
|
Mno
|
%
|
0.10
|
0.00
|
|
Ti02
|
%
|
0.13
|
0.13
|
|
P2o3
|
%
|
0.04
|
0.06
|
|
LOI
|
%
|
5.67
|
8.09
|