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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 | |||
TiO2 | % | 0.13 | 0.13 | |||
P2O3 | % | 0.04 | 0.06 | |||
LOI | % | 5.67 | 8.09 | |||
















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