Pozzolan Cement

Pozzolan Cement

 

a general name for a group of cements containing not less than 20 percent active mineral additives. The term “pozzolan cement” is derived from the name of a friable volcanic rock—pozzolana—used in ancient Rome as an additive to lime in the production of hydraulic cement.

In modern construction, the major type of pozzolan cement is portland-pozzolan cement, produced by grinding together portland cement clinker (60–80 percent), an active mineral additive (20–40 percent), and a small amount of gypsum. It differs from ordinary portland cement in its higher resistance to corrosion (especially in soft or sulfate waters), reduced rate of hardening, and lower frost resistance. Pozzolan cement is used mainly to produce concretes used in underwater and underground structures.

pozzolan cement

Pozzolan interground with lime; a natural cement used in ancient times.
References in periodicals archive ?
Main innovations are related to: the creation of pozzolan cement made with CDW and/or construction waste precursors (15% weight of the tile); the substitution of aggregates with recycled glass (around.
Recently, a more rapidly setting MTA-based cement was developed using small particles of pozzolan cement without chemical accelerators that presented biocompatibility and osteogenicity properties similar to those of ProRoot MTA [21, 22].
Although some physical properties and biocompatibility of MTA-based pozzolan cement are documented [20, 21], no study has directly compared selected physical and chemical properties of MTA-based cements and pozzolan PC.
PC has been extensively investigated as a viable alternative for MTA in endodontic applications [27], and although MTA-based pozzolan cement has been developed as a dental material [21, 22], limited information regarding pozzolan PC has been published.
ASTM WK42602, Test Method for Compressive Strength of Alkali Activated Coal Fly Ash and Raw or Calcined Natural Pozzolan Cement Mortars (Using 2-in.
These results corroborate earlier findings on pozzolan cement concrete [27, 35, 36, and 37].
Cement types produced by Holcim In 2011 GRI EN3 Slag cement 10% Pozzolan cement 8% Fly ash cement 25% Limestone cement 15% Multiple blend cement 14% Masonry cement, oilwell cement, white cement, special binder 5% Ordinary Portland Cement 23% * All but Ordinary Portland Cement are composite cements.
Portland Resistant to sulfate For two-three floor Pozzolan Cement and moderate hydration buildings, general heat concrete construction , mass concrete construction like full plate foundation and dams, building construction in coastal areas swampy area and buildings on ground containing aggressive sulfuric salt and building construction needing high water tightness such as sanitation construction, water construction and water pools or reservoirs.
The company produces ordinary Portland cement, sulphate resistant cement and Portland pozzolan cement.
The main product of ITP is Portland cement of Type I (Ordinary Portland Cement (OPC) and Portland Pozzolan Cement (PPC), which was replaced with Portland Composite Cement (PCC) in 2005.
Its Portland cement consists of type I,II,III,V and Portland Pozzolan Cement (PPC).
In addition to portland cement of type I as its main product, Indocement also produces portland cement of type II and V, oil well cement, white cement and pozzolan cement.