Calcium Carbonate
Ground calcium carbonate, graded for consistent brightness and particle size.
Learn MoreMetakaolin is a calcined kaolin clay valued for its pozzolanic reactivity, used as a supplementary cementitious material to improve strength and durability in concrete. It reacts with free lime to produce a denser concrete with no efflorescence. By partially replacing clinker, a major source of CO₂ emissions in traditional cement production, metakaolin supports the shift toward lower-carbon, greener cement formulations.
The table below shows our Metakaolin grade, with particle size (D50), reflectance and oxide content (SiO₂, Al₂O₃, Fe₂O₃, TiO₂) detailing its composition. This grade is used in cementitious applications, reflecting its role as a pozzolanic material.
| Grade | Type | D50, microns | Reflectance (R457) | SiO2 (%) | Al2O3 (%) | Fe2O3 (%) | TiO2 (%) | Applications | Stocked In |
|---|---|---|---|---|---|---|---|---|---|
| Metakaolin | powered | 9 | 70 | 56.8 | 43.5 | 0.5 | 1.3 | cement | CPT |
# = Not in SA but can be ordered in FCLs (Full Container Loads)
The combination of SiO₂ and Al₂O₃ reacts with calcium hydroxide during cement hydration, contributing additional strength-giving properties.
Partially replaces clinker, reducing the CO₂ footprint of the concrete without sacrificing performance
Reduces permeability and improves resistance to chemical attack (sulfate and chloride ingress), extending concrete service life.
Due to the reaction of metakaolin with lime in the concrete.
Get in touch with one of our experts who will guide you on our different product grades and which will be best suited to your application.
Ground calcium carbonate, graded for consistent brightness and particle size.
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