Micro Silica Specification

Micro Silica Specification

Micro Silica Specification

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MICRO SILICA
STANDARD ASTM C-1240
SiO2 90 – 92%
+45 Microns 5% Max
LOI 3% Max
Moisture 2.5% Max
SO3 2% Max
MgO 5% Max
Alkali content (Na2O + 0.658 K2O) 1.5% Max
Chloride content 0.1% Max
Free CaO 1% Max
Free SiO2 0.4% Max
Density 500 – 600 Kg/m3
MICRO SILICA
STANDARD BS 4550
SiO2 90 – 92%
+45 Microns 3% Max
LOI 3% Max
Moisture 2.5% Max
SO3 2% Max
MgO 5% Max
Alkali content (Na2O + 0.658 K2O) 1.5% Max
Chloride content 0.1% Max
Free CaO 1% Max
Free SiO2 0.4% Max
Density 500 – 600 Kg/m3
Sl No Parameters Results (%) Actuals Standards
1 SiO2 92.68 88 – 93 ASTM C – 1240
2 LOI (at 750OC) 3.01 4% Max ASTM C – 1240
3 +45 Microns 2.90 5% Max ASTM C – 1240
4 Al2O3 0.45 < 2% ASTM C – 1240
5 Fe2O3 0.30 < 1% ASTM C – 1240
6 SO3 0.16 < 1% ASTM C – 1240
7 MgO 0.42 < 1% ASTM C – 1240
8 K2O 0.21 < 1% ASTM C – 1240
9 Na2O 0.59 < 1% ASTM C – 1240
10 pH Value 7.5% Max ASTM C – 1240
11 Density 578 500 – 600 Kg/m3 ASTM C – 1240
12 Specific Surface Area (B.E.T) > 16M2/gm
13 Pozzolanic Activity Index (7 Days) 109 105% Min
14 Pozzolanic Activity Index (28 Days) 119 117% Min

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