STP871: Thermal Shock and Maximum Temperature Investigation of a Single Unit Clay Brick Masonry Chimney

    Huizer, A
    Senior instructor and professor and head, The University of Calgary, Calgary, Alberta

    Ward, MA
    Senior instructor and professor and head, The University of Calgary, Calgary, Alberta

    Pages: 13    Published: Jan 1985


    Abstract

    A double-wall clay chimney flue liner, which has been shown to pass the requirements for “zero clearance” applications at hearth temperatures of approximately 700°C (1292°F), was subjected to an additional series of tests presently only prescribed for metal chimneys. Although the National Building Code of Canada at this point in time does not require clay flue liners to pass the test requirements set for metal chimneys, the authors considered it to be a distinct possibility that in the near future there will be some pressure to have clay liners attain the same standards that the metal ones presently are required to meet. Therefore, the unit under investigation was subjected to the most severe conditions that might be experienced by clay flue liners such as thermal shock, creosote burnout, and extremely high flue gas temperatures. Test results showed that at present the unit would not pass the new standards set for metal chimneys, and that it will be necessary to reevaluate its geometry as well as the properties of the clays used in its manufacture.

    Keywords:

    masonry, chimneys, flue liners, thermal shock, burnout test


    Paper ID: STP34552S

    Committee/Subcommittee: C12.02

    DOI: 10.1520/STP34552S


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