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وصف
Microsilica : is a cement additive that consists primarily ofsilicon dioxide(SiO2) .
It is used to increase concrete strength and durability .
Chemical Specifications:
| Constituents | % | BS EN -196 |
| Sio2 | 92.16 | Min 90 % |
| Free si content | 0.018 | Max 3 % |
| Free calcium oxide | 0.52 | Max 1 % |
| Cl | 0.08 | Max 0.1 % |
| SO3 | 0.73 | Max 2 % |
| MgO | 0.93 | Max 5 % |
| Loss on ignition | 2.48 | Max 4 % |
| Alkali content | 0.52 | Max 1.5 |
Physical Specifications:
| Specification | . | BS EN -196 |
| Moisture % | 0.54 | Max 3.00 % |
| Bulk density | 400-665Kg/m3 | |
| Specific surface
area m2/g |
27.18 | Min 15 m2/g |
| % retained on 45 micron sieve | 7.55 | Max 10% |
Pozzolanic activity index:
| Specification | % | ASTM C1240:05 |
| Pozzolanic activity index | 121 | Min 105% |
Packing:1 ton 2 spout jumbo bags.
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Microsilica
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