pozzolana

It much resembles the Italian pozzolana and is applied to like purposes.

The construction used Pozzolana concrete which hardens in contact with sea water.

Mineral resources include salt, pozzolana (a volcanic rock used in cement production), and limestone.

The barges were ballasted with 0.5 meters of pozzolana concrete and floated out to their position.

Volcanic dusts, called Pozzolana or "pit sand", were favored where they could be obtained.

However, this method required many divers to hammer in the stakes underwater and it used large quantities of pozzolana.

The main mine resources are sulfur, kaolin, pozzolana, plaster and turf, etc.

The chemical composition of pozzolana is variable and reflects the regional type of volcanism.

One type of cement, called pozzolana, consisted of water, lime, sand, and volcanic rock.

Regular Roman concrete for example was made from volcanic ash (pozzolana), and hydrated lime.

And then there is something called Pozzolana earth, a kind of volcanic ash that might have been applied between the wood and the varnish.

One technique was to drive stakes into the ground to make a box and then fill the box with pozzolana concrete bit by bit.

Within the piers, special volcanic pozzolana powder was imported to be mixed with cement, which allowed the concrete to set under water.

The ancient Roman architect Vitruvius speaks of four types of pozzolana.

See Pozzolana mortar, for the marine concrete in the Port of Cosa.

In order to gain strength by means of a strong cement, Giuliano built his dome with pozzolana brought from Rome.

The moles were made of lime and pozzolana, a type of volcanic ash, set into a concrete underwater.

Most of the soil is of volcanic origin, with prevalence of materials such as tuff and pozzolana.

Dated between 8,000 - 500 years ago, it is characterized by white pozzolana, the material that forms the majority of volcanos in Flegrei Fields.

Their concrete was an aggregate of stone rubble bonded with mortar made of lime and a volcanic ash called pozzolana.

The dock walls were of local brick, whilst cement for its construction was rendered waterproof through the use of pozzolana imported from Italy.

Even later, the Romans used a mortar without pozzolana using crushed terra cotta, which introduced aluminum oxide and silicon dioxide into the mix.

The institute in the 1990s begun researching into Pozzolana cement, an alternative cement to the Portland cement for building.

It was a powerful cement derived from pozzolana, and soon supplanted marble as the chief Roman building material and allowed many daring architectural schemata.

Now it produces two products which are Portland slag cement(43 grade) and Portland pozzolana cement.