pozzolana

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A type of volcanic ash used for mortar or for cement which sets under water
Volcanic ashes from Pozzuoli, in Italy, used in the manufacture of a kind of mortar which hardens under water

İlgili Terimler

pozzolan
Any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements
pozzolanic
Having the characteristics of pozzolana, a type of volcanic ash used for mortar or for cement which sets under water
pozzolan
a natural or artificial siliceous material commonly added to Portland cement mixtures to impart certain desirable properties Added to oil-well cements, pozzolans reduce slurry weight and viscosity, increase resistance to sulfate attack, and influence factors such as pumping time, ultimate strength, and water tightness
pozzolan
A type of silicon/alumina material that occurs naturally and is produced as a byproduct of coal combustion When powdered and moistened it will react with calcium hydroxide and water Its most useable form is fly ash
pozzolan
A fine powdered material which is added to non-hydraulic lime mortars to accelerate the set The material possesses little or no cementitious value, but in a finely divided form it will react with calcium hydroxide (lime putty) in the presence of moisture to provide a chemical set The term derives from the Italian region of Pozzuoli, near Naples, where the effects of the local volcanic ash on lime mortars was first noticed by the Romans Other pozzolanic materials in this category include finely crushed brick or clay tile dust, pulverised fuel ash (PFA) with a low sulfate content and 'high temperature insulation' (HTI)
pozzolana

    Heceleme

    poz·zo·la·na

    Telaffuz

    Etimoloji

    [ "pät-s&-'lä-n&am ] (noun.) 1706. From Italian pozz(u)ollana, earth of Pozzuoli, a town near Naples.