pozzolan


Also found in: Dictionary, Wikipedia.
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 ?
7-ton bulk sample of perlite processed to produce a horticultural grade raw perlite and a finely crushed perlite for sale as natural pozzolan.
Sunrise said a seven-ton bulk sample of perlite was processed to produce a horticultural grade raw perlite and a finely crushed perlite for sale as natural pozzolan.
"Natural pozzolan and other SCM that meet ASTM specifications are generating very high interest.
fly ash passing sieve No.400, has GS value of 3.057 ton/[m.sup.3], similar to the one of Portland Pozzolan cement.
Endoseal MTA is a pozzolan based cement having particle size of 1.5 micro-meter, whereas AH plus has a particle size of 8 micro-meter.
Cruz explained that his invention allows the blending of pozzolan and portland processes to come up with type 1B cement for general construction purposes.
"An experimental study on durability properties of concrete containing zeolite as a highly reactive natural pozzolan." Construction and Building Materials, Vol.
The use of natural pozzolan and brick dust with lime was a common technique, in cases where special needs were covered, such as high strength and water tightness [9].
Ghorbani, "Chemical activation and set acceleration of lime-natural pozzolan cement," Ceramics--Silikaty, vol.
The fourteenth paper described the modification of hydration of Portland cement in the presence of nano-Si[O.sub.2]-polycarboxylate compounds which were combinations of pozzolan and superplasticizer.
Natural pozzolan (NP) is being widely used as cement replacement due to its ecological, economic., and performance-related advantageous properties [36-41].
Finding that light aggregates affect the microstructure of the interfacial transition zone (ITZ), of porous quality, which has been improved with the addition of fly ash and silica fume, finding that, in order to improve resistance to sulfate attack with these materials, the content of fly ash or natural pozzolan should be between 25 and 35% by mass, while for silica fume between 7 and 15% (ACI 201-2) [13-15].