FLY ASH (CLASS F) Specification

FLY ASH (CLASS F) Specification

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FLY ASH (CLASS F)
STANDARD ASTM C-618
SiO2 + Al2O3 + Fe2O3 70% Min
+45 Microns 34% Max
LOI 6% Max
Moisture 3% Max
SO3 4% Max
CaO 2% Max
MgO 5% Max
Total Chlorides 0.5% Max
Na2O 1% Max
Free SiO2 50% Max
Strength Activity Index (N/mm2) With Portland Cement at 7 Days Min 75% Min
Water requirement (% of control) 105% Max
Soundness (Autoclave) mm 0.8% Max

ANALYSIS – FLY ASH (CLASS F) – ASTM C-618

Sl No Parameters Results (%) Actuals Standards
1 SiO2 + Al2O3 + Fe2O3 92.77 90% Min ASTM C – 618
2 SiO2 60.52 60% Min ASTM C – 618
3 LOI (at 750OC) 0.41 3% Max ASTM C – 618
4 +45 Microns 28.17 34% Max ASTM C – 618
5 CaO 0.46 2% Max ASTM C – 618
6 MgO 0.59 2% Max ASTM C – 618
7 Na2O3 0.51 1% Max ASTM C – 618
8 SO3 0.092 3% Max ASTM C – 618
9 Strength Activity Index (N/mm2) With Portland Cement at 7 Days Min 94.00 75% Min ASTM C – 618
10 Water requirement (% of control) 102.90 105% Max ASTM C – 618
11 Soundness (Autoclave) mm 0.014 0.8% Max ASTM C – 618

ANALYSIS – FLY ASH (CLASS F) – BS 3892

Sl No Parameters Results (%) Actuals Standards
1 SiO2 + Al2O3 + Fe2O3 92.77 90% Min BS 3892
2 SiO2 60.52 60% Min BS 3892
3 LOI (at 750OC) 0.41 3% Max BS 3892
4 +45 Microns 12.00% 12% Max BS 3892
5 CaO 0.46 2% Max BS 3892
6 MgO 0.59 2% Max BS 3892
7 Na2O3 0.51 1% Max BS 3892
8 SO3 0.092 3% Max BS 3892
9 Strength Activity Index (N/mm2) With Portland Cement at 7 Days Min 94.00 75% Min BS 3892
10 Water requirement (% of control) 102.90 105% Max BS 3892
11 Soundness (Autoclave) mm 0.014 0.8% Max BS 3892

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