pozzolan

English

Alternative forms

Etymology

From Italian pozzolana.

Noun

pozzolan (plural pozzolans)

  1. Any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements.
    • 2009 March 31, Henry Fountain, “Concrete Is Remixed With Environment in Mind”, in The New York Times‎[1]:
      Both are what are called pozzolans, reactive materials that help make the concrete stronger.
    • 2020 May, Michael Thomas, David Smith, and Edward Moffatt, “THE USE OF GROUND GLASS AS A POZZOLAN”, in (Please provide the book title or journal name)‎[2], page 1:
      The U.S. Bureau of Reclamation (Gilliland & Moran 1949; Moran & Gilliand 1950) developed a mortar bar expansion test using Pyrex glass as a “standard reactive aggregate” to evaluate the efficacy of pozzolans for controlling ASR. For example, in the specification for the Davis Dam in Arizona the requirement for the pozzolan, among other properties, was to affect a reduction of at least 75% in the 14-day expansion of mortar bars produced with high-alkali cement plus 20% pozzolan plus Pyrex glass when stored over water at 100°F (38ºC).

Derived terms

  • pozzolana
  • pozzolanic cement
  • pozzolanic fly ash cement

Translations

See also

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