pozzolan


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Related to pozzolan: Pozzolan Cement, natural pozzolan

pozzolan

[′pät·sə·lən]
(geology)
A finely ground burnt clay or shale resembling volcanic dust, found near Pozzuoli, Italy; used in cement because it hardens underwater.
(materials)
Cement made by mixing and grinding together slaked lime and pozzolan without burning; sometimes used for concrete not exposed to the air.

pozzolan, pozzolona, pozzuolana

A siliceous or siliceous and aluminous material, which in itself possesses little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide at ordinary temperatures to form compounds possessing cementitious properties.
References in periodicals archive ?
Pozzolans are used in combination with binding materials to improve the workability, mechanical and durability properties of concrete and decrease its cost.
How is Pozzolan planning to achieve this ambitious target?
In a view to producing a pozzolan (supplementary cementing material), nearly complete dehydroxylation must be reached without overheating, i.
The plants with the largest number in mini-tubers are those of T4 substrate composed of peat + pozzolan, which gives up to 11 mini-tubers per plant, followed by T1 treatment with a number of 09 mini-tubers per plant.
Use of pozzolans is effective against ASR expansion owing to pozzolanic reaction and reduction in alkali content (Tuthill, 1982).
Keywords: Agriculture Structures, diatomite, light-weight aggregate, light-weight concrete, pozzolan.
Pozzolan is a fine inorganic material composed mainly by rich siliceous or silico-aluminous amorphous phases, which itself possess lower or no binder properties, but in the presence of water, at ordinary temperature and pressure, will chemically react with calcium hydroxide to produce compounds with binder properties.
18] ASTM C618-08a, "Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete", West Conshohocken, PA, American Society for Testing and Materials, 2008.
The purified mineral matter that is being produced at Winyah is 100% inorganic and meets ASTM C-G18 "Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete.
In fact, construction industry in Saudi Arabia can benefit immensely by using our natural pozzolan.
Pozzolan materials such as ground granulated blast furnace slag (GGBS), fly ash (FA), silica fume (SF) and natural pozzolan have been used successfully as substituting materials for Portland cement.