Comment reconnaître la pouzzolane ?
Comment reconnaître la pouzzolane ?
La pouzzolane est une roche naturelle qui est formée de projections basaltiques volcaniques. Elle révèle une couleur allant du noir au rouge en passant par le gris et dispose d'une structure alvéolaire.
Comment placer de la pouzzolane ?
Les préfiltres à pouzzolane sont situés : dans la fosse septique, juste avant la canalisation de sortie vers le traitement ; et juste après la fosse septique (préfiltre séparé).
What is pozzolan and how is it made?
- Pozzolan is a very finely ground pumice or fly ash. The specific gravity of pozzolan is only slightly less than cement. Therefore only a slight reduction of the specific weight can be achieved. On the other hand, pozzolan is inexpensive. Pozzolan has been proposed in several formulations.
Which materials show pozzolanic activity?
- Both natural and artificial (man-made) materials show pozzolanic activity and are used as supplementary cementitious materials.
What is pozzolana reaction?
- In this reaction insoluble calcium silicate hydrate and calcium aluminate hydrate compounds are formed possessing cementitious properties. The designation pozzolana is derived from one of the primary deposits of volcanic ash used by the Romans in Italy, at Pozzuoli.
How to measure the capacity of a pozzolan to react?
- The quantification of the capacity of a pozzolan to react with calcium hydroxide and water is given by measuring its pozzolanic activity. Pozzolana are naturally occurring pozzolans of volcanic origin.
