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Frost-durability study on Canadian clay bricks. II. Thermal gradient and quality of burnt bricks in kilns

From National Research Council Canada

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FormatText, Article
Subjectclay bricks; freeze thaw cycles; durability; quality control; temperature gradients; testing, performance of burnt bricks; quality control; specifications; sw grade; astm c62; mw, nw grades; kiln temperature differences; firechek-key shrinkage; degree of firing; flue space; Brick; brique en terre cuite; gel dégel; durabilité; contrôle de qualité; gradient de température
Abstract
Significant differences exist in the quality of burnt bricks produced in different plants, ranging from 0 to 100% SW grade according to ASTM C62, and different SW, MW, and NW grades of bricks were found within most production runs studied. These differences were found to be caused by the temperature differences in the kilns, as determined by the firechek-key shrinkage method. The temperature difference between the coldest and the hottest regions within the nine kilns studied is estimated to range from 25 to 90 degrees C. The difference in degree of firing obtained on the exterior surface and in the interior section of a brick was found to be a function of its position in the kiln, especially with respect to the flue space.
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  • Durability of Building Materials 5, no. 2 (October 1987): 111–124.
LanguageEnglish
Peer reviewedYes
IdentifierIRC-P-1498
NRC numberNRCC 28550
NRC-IRC-2198
NPARC number20374654
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Record identifier82834344-1893-488b-aa47-f0f3613ddf20
Record created2012-07-23
Record modified2020-06-06
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