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Metakaolin
What is metakaolin
Metakaolin is a mineral that is formed by dehydration at 700-800°C of natural kaolinite. It is a type of aluminum silicate that is an excellent additive for concrete, mortar and other building products that require high strength and durability.
Metakaolin works well as an additive for concrete, improving its strength, reducing shrinkage during curing and increasing frost resistance. Its versatility makes it invaluable in modern construction, ensuring long-lasting structural quality.
What is metakaolin used for
Metakaolin is primarily used as an additive for cement, mortar and concrete. Thanks to its properties, it significantly improves parameters such as:
- Durability - increases compressive and bending strength, which translates into structural durability.
- Density - creates a more compact and uniform structure, reducing the porosity of the material.
- Resistance to external agents - increases resistance to water, salt, acids and other aggressive substances.
- Frost resistance - improves resistance to freezing and thawing cycles.
For whom metakaolin is intended
Concrete manufacturers
Construction companies
Research laboratories
Properties of metakaolin
Metakaolin has a unique set of properties that make it a valuable addition to many building materials.
- High pozzolanic activity - due to its amorphous structure, metakaolin reacts with calcium hydroxide to form stable compounds, which contributes to the strength of materials.
- Large specific surface area - large contact area with other components allows faster and more efficient chemical reactions.
- Hydrophobicity - metakaolin's hydrophobic properties make it more difficult for water to wet it, which can have a beneficial effect on some technological processes.
High pozzolanic activity, low volumetric density, high specific surface area and hydrophobicity are the most important characteristics of metakaolin, which determine its wide use in the construction industry. Thanks to these properties, metakaolin makes it possible to obtain materials of high quality and durability.
Use of metakaolin
Metakaolin is used in many fields, but it is most important in the construction industry. Thanks to its unique properties, it is used as an additive in the production of various construction materials.
- Concretes - added to concrete improves its strength, durability and resistance to external agents.
- Mortars - increases the strength and water resistance of masonry and plastering mortars.
- Prefabricated products - used in the production of prefabricated elements such as floor slabs, wall slabs and columns.
- Fire-resistant materials - due to its fire-resistant properties, metakaolin is used in the production of fire-resistant building materials.
Metakaolin is a versatile material that is used in many fields. Thanks to its unique properties, it makes it possible to obtain building materials of high quality and durability. Its widespread use is due to continuous research and development of new technologies that allow even better use of the potential of this mineral.
Why use metakaolin
There are many benefits to using metakaolin:
- Increase durability of structures - by improving strength and resistance to external factors.
- Reducing cement consumption - metakaolin can partially replace cement, helping to reduce CO2 emissions.
- Improving concrete quality - metakaolin makes concrete more uniform and less prone to cracking.
- Extend the life of the structure - thanks to increased resistance to external factors.
Characterization of typical physical and chemical parameters
| Metakaolin L05 | Metakaolin LB05 | ||
| Al2O3 | % | 40.10 (min. 38.0) | 37.50 (min. 35.0) |
| SiO2 | % | 54.10 (max. 57.0) | 54.40 (max. 56.0) |
| K2O | % | 0.80 (max. 0.9) | 1.10 (max. 1.3) |
| Fe2O3 | % | 1.10 (max. 1.8) | 3.50 (max. 4.0) |
| TiO2 | % | 1.80 (max. 2.0) | 1.30 (max. 1.6) |
| MgO | % | 0.18 (max. 0.4) | 0.25 (max. 0.4) |
| CaO | % | 0.13 (max. 0.2) | 0.28 (max. 0.4) |
| Roasting loss | % | 2,20 (0,3 – 4,0) | 2,20 (0,3 – 4,0) |
| Moisture | % | 0,50 | 0,50 |
| Specific surface area | m²/g | 12,69 | 11,43 |
| Pozzolanic activity | 0C | 4.30 (min. 4.0) | 4.60 (min. 4.0) |
| White | % | 60,0 | 65 |
| Granulation | D50 = 3µm; D90 = 10µm | D50 = 3µm; D90 = 10µm |
*Average values (guaranteed).
Mikrosilika Trade
Natalia Wianecka
ul. Kwiatkowskiego 1/223
37-450 Stalowa Wola
POLAND
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