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

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AuthorSearch for:
TypeArticle
Journal titleDurability of Building Materials
ISSN0167-3890
Volume5
Issue2
Pages111124; # of pages: 14
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
AbstractSignificant 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.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierIRC-P-1498
NRC number28550
2198
NPARC number20374654
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Record identifier82834344-1893-488b-aa47-f0f3613ddf20
Record created2012-07-23
Record modified2016-05-09
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