Physical characteristics: Thiraiki gi (Pozzolan or Volcanic ash - pumice) comes from Greek islands Milos or Nisiros, and is a main ingredient of the traditional plaster Eco-kourasani.
It is high in active SiO2 (average 55%), the specific weight of the material is 2,4 gr / cm │. The final product 0-75 mm the surface according to Blaine is 7.000 cm ▓ / gr. The content in water soluble alkalis according to ASTM is very low.
-Water soluble alkalis Na2Oeq 0,053%
-Available alkalis Na2Oeq 0,82 %
-LOI 8,3 %