Also found in: Encyclopedia, Wikipedia.


 (pŏt′sə-län′) also poz·zo·la·na (-sə-lä′nə) or poz·zuo·la·na (-swə-)
1. A siliceous volcanic ash used to produce hydraulic cement.
2. Any of various powdered substances that react with lime to form strengthening or enhancing compounds in cement.

[Italian pozzolana, after Pozzuoli.]

poz′zo·la′nic adj.


(Geological Science) consisting of, containing or of the nature of pozzolana
References in periodicals archive ?
Oil shale ash is proved as a self-cementitious material composed of an alkali part represented by its high content of CaO, and a Pozzolanic part composed of [SiO.
via%3Dihub) volcanic ash study , titled "Impact of Embodied Energy on materials/buildings with partial replacement of ordinary Portland Cement (OPC) by natural Pozzolanic Volcanic Ash," appeared in the Journal of Cleaner Production.
A principal player in polycarboxylates, GCP Applied Technologies likewise recognizes the promise of nano-silica, whose performance in concrete owes to reactive surface area hovering 1,000 times that of portland cement or pozzolanic materials.
It also offers pozzolanic, sulphur-resistant cement, and clinker, as well as provides cement finishing services.
Poor curing conditions are more adversely effective on the strength of concretes made by pozzolanic cements than that of ordinary portland cement (OPC), and it is necessary to apply water curing to the former concretes at least for the initial 7 days to expose the pozzolanic activity.
Fly ash has a pozzolanic activity (when finely divided it reacts with water and calcium from lime to form a compound with cementitious properties) and can reduce the amount of expensive cement in the mixture by up to 30%.
However, due to their low lime contents and dependence on the Ca(OH)2 released by the hydration reaction of Portland cement for their pozzolanic reactions, they could only be used as partial replacements for Portland cement in conventional concrete.
Effects of mechanical and thermal activation on pozzolanic activity of kaolin containing mica.
ABSTRACT: This research study instigate the consequence of heat and heating duration on the pozzolanic activity of waste paper sludge (WPS).
Ultrafine grinding of sugar cane bagasse ash for application as pozzolanic admixture in concrete.
While the main application of fly ash is as a pozzolanic additive to concrete, the plastics industry also is capable of playing an important role in exploiting this underutilized raw material, which has the potential to impact significantly on environmental issues [33-36].
The utilization of calcined clay in the form of metakaolin (METAKAOLIN) as a pozzolanic addition for mortar and concrete has received considerable interest in recent years.