Quality-control test for clay brick based on air permeability

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Journal titleAmerican Ceramic Society Bulletin
Pages141217; # of pages: 1396
Subjectclay bricks; freeze thaw cycles; durability; baking; permeability; firing temperature; retention time; freeze-thaw durability; modified blaine apparatus; minimum firing temperature determination; nitrogen surface-area tests; Brick
AbstractThe degree of firing (a function of temperature and retention time) that a brick receives is a major determinant of its freeze- thaw durability. A rapid, simple quality control test was developed to assess freeze-thaw resistance based on the measurement of air permeability. The test is performed on a cylindrical core using a modified Blaine apparatus. Air permeability varies with firing temperature in a manner characteristic of a given brick mix and shows a maximum value at a relatively high firing temperature. The maximum air permeability is believed to occur at the minimum firing temperature at which sufficient particle-surface melting has occurred to develop a durable brick. The test thus can be used to define the minimum firing temperature for a given clay mix. The significance of the air- permeability values was further examined by performing conventional nitrogen surface-area tests.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number29609
NPARC number20375583
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Record identifier782f3b55-0b16-4fcc-bdf6-c231642794e2
Record created2012-07-23
Record modified2016-05-09
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