Now it produces two products which are Portland slag cement ( 43 grade ) and Portland pozzolana cement.
12.
His most significant contribution to the project was the idea to use pozzolana to make the pipes waterproof.
13.
Cement for the lock wall's front construction was rendered waterproof through the use of pozzolana imported from Italy.
14.
One kind of cement, called pozzolana, was made of water, lime, sand, and volcanic rock.
15.
The material was called " pozzolana " from the town of Pozzuoli, west of Naples where volcanic ash was extracted.
16.
One technique was to drive stakes into the ground to make a box and then fill it with pozzolana concrete bit by bit.
17.
Santorini provided pozzolana ( volcanic ash ); Milos, sulphur; and Antiparos and Sifnos, zinc in the form of calamine.
18.
Instead of using the double planked method filled with rubble, the architects sank barges filled with layers of pozzolana concrete and lime sand mortar.
19.
The flooded inside area was then filled by divers bit by bit with pozzolana-lime mortar and kurkar rubble until it rose above sea level.
20.
With alternating layers, pozzolana based and lime based concretes were hand placed inside the barge to sink it and fill it up to the surface.
