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Standard for Topken Micro silica Grade90
| Parameters | Standard Value |
| Silicon Dioxide(SiO2) | min 90 % |
| Loss on Ignition(L.O.I) | max 3 % |
| Moisture Content(H2O ) | max 1.0 % |
| Percent Retained On 45μm (325 sieve) | max 2.0 % |
| Bulk Density | 250-300kg/kg/m3 and 600-700kg/m3 |
Standard for Topken Micro silica Grade92
| Index items | Standard Value |
| SiO2(Silicon Dioxide) | Min. 92.0% |
| C(Carbon) | max. 2.0% |
| Fe2O3 (Iron Oxide) | Max. 0.50% |
| Al2O3(Aluminium Oxide) | Max. 0.70% |
| CaO(Calcium Oxide) | Max. 0.50% |
| MgO(Magnesium Oxide) | Max. 0.50% |
| K2O(Potassium Oxide) | Max. 0.70% |
| Na2O(Sodium Oxide) | Max. 0.40% |
| Moisture Content(H2O) | Max. 1.5% |
| Loss on Ignition(L.O.I) @ 975°C | Max. 3.0% |
| Percent Retained On 45μm (325 sieve) | Max. 1.5% |
| Bulk Density | 250-300kg/m3 |
| pH Value(fresh) | 4.5-7.5 |
Standard for Topken Micro silica Grade94
Analysis/Properties | Value |
SiO2 Silicon Dioxide, Amorphous | min 94% |
Fe2O3 Iron Oxide | Typical 0.19% |
Al2O3 Aluminium Oxide | Typical 0.27% |
CaO Calcium Oxide | Typical 0.26% |
MgO Magnesium Oxide | Typical 0.49% |
K2O Potassium Oxide | Typical 0.50% |
Na2O Sodium Oxide | Typical 0.38% |
P2O5 Phosphorus Pentoxide | Typical 0.26% |
MnO Manganese Oxide | Typical 0.25% |
TiO2 Titanium Oxide | Typical 0.21% |
Loss on Ignition | Typical 2.88% |
Coarse Particles >45μm (325mesh) | max 1.2% |
Bulk Density(as packed) | 200-350kg/m3 U500-700kg/m3 D |
Standard for Topken Micro silica Grade95
| Index items | Standard Value |
| SiO2(Silicon Dioxide) | Min. 95.0% |
| Fe2O3 (Iron Oxide) | Typical 0.21% |
| Al2O3(Aluminium Oxide) | Typical 0.08% |
| CaO(Calcium Oxide) | Typical 0.11% |
| MgO(Magnesium Oxide) | Typical 0.21% |
| K2O(Potassium Oxide) | Typical 0.32% |
| Na2O(Sodium Oxide) | Typical 0.24% |
| P2O5(Phosphorus Pentoxide) | Typical 0.09% |
| Moisture Content(H2O) | Max. 1.0% |
| Loss on Ignition(L.O.I) | Typical 2.63% |
| Coarse Particles >45μm (325mesh) | max 1.2% |
| Bulk Density | 200-350kg/m3 U500-700kg/m3 D |
Standard for Topken Micro silica Grade97
| Analysis/Properties | Standard Value |
| SiO2(Silicon Dioxide) | Typical 97.24% |
| C(Carbon) | Max. 0.7% |
| Fe2O3 (Iron Oxide) | Typical 0.071% |
| Al2O3(Aluminium Oxide) | Typical 0.044% |
| CaO(Calcium Dioxide) | Typical 0.18% |
| MgO(Magnesium Dioxide) | Typical 0.18% |
| K2O(Potassium Dioxide) | Typical 0.38% |
| Na2O(Sodium Dioxide) | Typical 0.13% |
| Mn2O3(Mananese Oxide) | Typical 0.033% |
| P2O5(Phosphorus Pentoxide) | Max. 0.1% |
| SO3(Sulphur Trioxide) | Max. 0.2% |
| Cl (Chloride) | Typical 0.014% |
| Moisture Content(H2O ) | Max. 0.5% |
| Loss on Ignition(L.O.I) | Typical 1.83% |
| pH Value | 6-8 |
| Percent Retained On 45μm (325 sieve) | Max. 0.5% |
| Bulk Density | 200-350kg/m3 |
TOPKEN Micro silica in refractory
1.Enhancing the fluid of pouring refractory, reducing the volume of used water, be easy to shape, and raising the production efficiency.
2.Because of its untramicrostructure for gap filling, the compact and intensity of refractory gain rising by a wade margin.
3.TOPKEN Micro silica is a highly effective pozzolanic material, so it's easy to come into being Mullite Phase, under the premise that Al2O3 exists, enhance elevated temperature strength and thermal shock of refractory.
TOPKEN Micro silica in Concrete
The uses for TOPKEN Micro silica in concrete fit into general categories of enhancing mechanical properties, improving durability, enhancing construct ability.
1. Making high-grade concrete effectively enhances the strength and pumpability of strong concrete.
2. Making high crack-resistance, self-waterproofing concrete, be used in the subway, tunnel and basement of high-rise structures.
3. Used in maritime works and chemical industry. Owing to the compactability, it can prevent effectively sulphate and chlorine ion from osmosizing and eroding Avoid the steel corroding in armoured concrete (RC), lengthen the life-span of concrete.
4. Effects on high-early strength concrete and strong concrete.
5. In project item for water conservancy and bridge, the concrete not only needs basic quota mentioned above, but also its wear-resistant quality and abrasion resistance. Thus, adding TOPKEN Micro silica is necessary.
6. Effects on shortcreting-lined concrete for support in tunnel, subway, and large-scale foundation ditch.
7. Used in the construction item under water, such as pier, huge dam and drilling platform.
8. Used in road surface concrete of expressway and large-scale bridge.
Topken Micro silica(90%-95%)