Metakaolin 1318-74-7 from Global Optimals is a high‑reactivity pozzolan produced from calcined kaolin with a purity of ≥95 % and pozzolanic activity of ≥82 %. The average particle size of 3–8 µm ensures uniform dispersion and accelerates cement hydration. Chemically, the material is an amorphous aluminosilicate powder containing reactive silica and alumina phases that readily react with calcium hydroxide generated during cement hydration, forming additional calcium‑silicate‑hydrate (C‑S‑H) gel. This secondary gel refines the pore structure, increases density, and reduces permeability, which is why metakaolin is widely employed as a micro‑silica additive in high‑strength concrete, self‑compacting mixes, and shot‑crete applications. By lowering the water‑to‑cement ratio up to 10–15 % without sacrificing workability, it enables the production of more durable and crack‑resistant structures. In high‑performance paint systems, metakaolin acts as a functional filler that improves substrate adhesion, enhances resistance to alkaline and saline environments, and contributes to a smoother film finish. When combined with supplementary cementitious materials such as silica fume, fine cement, or super‑plasticizers, synergistic effects are observed, delivering superior mechanical properties and chemical durability. Typical dosage ranges from 5 % to 10 % of cement mass, although specialized applications—such as bridge decks, marine structures, or industrial flooring—may benefit from dosages up to 12 % with appropriate adjustments to the water‑cement ratio. The product complies with European standard EN 197‑1 and relevant GOST specifications. For storage, a dry, cool environment protected from moisture and direct sunlight is recommended; under these conditions the material retains its performance for up to 24 months. Transport is carried out in multi‑layer polypropylene bags that prevent moisture ingress and contamination. The low heat of wetting characteristic of metakaolin simplifies mixing, reduces blending time, and lowers energy consumption during batch preparation. Technical support includes guidance on compatible admixtures, formulation optimization, and evaluation of the resulting strength and durability parameters.
| Al₂O₃+SiO₂ | ≥95% |
| Белизна | ≥82% |
| D50 | 3–8 мкм |
| Пуццоланичность | Высокая |
Bags 25 kg / Big bags 500 kg
Metakaolin must be stored in a dry, well‑ventilated area, protected from direct sunlight and moisture. Recommended storage temperature ranges from +5 °C to +30 °C; deviations may affect its pozzolanic activity and particle stability. When kept in intact, sealed packaging, the typical shelf life is up to 24 months. Handling requires protective gloves and a dust mask to prevent inhalation. Ensure the multi‑layer polyethylene containers remain undamaged, with no leaks or deformation.
