Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A siliceous volcanic ash used to produce hydraulic cement.
  • n. Any of various artificially produced substances resembling pozzuolana ash.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any material which, when combined with calcium hydroxide, exhibits cementitious properties; often used as an extender with Portland cements.

Etymologies

Italian pozzolana, after Pozzuoli .
(American Heritage® Dictionary of the English Language, Fourth Edition)
From pozzolana (Wiktionary)

Examples

  • Chemical analyses of various samples of the ash material show that while its composition does vary, its content of silica, alumina, and iron oxides does meet the minimum ASTM chemical requirements for a cement binder (known technically as Type N or F pozzolan), and compares favorably with such materials used in the concrete for many Corps of Engineers construction projects in the Pacific

    Potential use of chemical suppressants to reduce remobilized, wind-blown ash

  • Pozzolan (or pozzolana) is an Italian word, named from Pozzuoli, the place near Naples where pozzolan was first mined and used as cement, during Roman times.

    Pumice

  • The largest producer is Italy, which dominates pozzolan production and also produces some pumice.

    Pumice

  • In Guatemala, pozzolan cement currently costs approximately 60% of the cost of portland cement.

    47. Tannin produced from pine bark

  • Mixed with lime at a ratio of 80: 20 or 70: 30 (pozzolan: lime), natural pozzolan behaves like cement.

    47. Tannin produced from pine bark

  • Twenty-five percent of Guatemala is in a volcanic zone that contains large surface deposits of a volcanic ash called pozzolan.

    47. Tannin produced from pine bark

  • Four demonstration houses will be built using pozzolan and workshops are being used to encourage small pozzolan cement production plants in rural areas near pozzolan deposits.

    47. Tannin produced from pine bark

  • Although some grinding is required to make it fine enough to work with, the pozzolan mix does not require firing which reduces production costs.

    47. Tannin produced from pine bark

  • Efficient and low-cost local lime production is essential to keep the cost of pozzolan cement low.

    47. Tannin produced from pine bark

  • The Centro de Investigaciones de Ingeniera at the Universidad de San Carlos de Guatemala and the Department of Civil Engineering at the University of Calgary are testing pozzolan cement as a substitute for portland cement in such applications as blocks and masonry mortar.

    47. Tannin produced from pine bark

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  • A material which, when combined with calcium hydroxide, exhibits cementitious properties.

    April 1, 2009