Pore structure and frost susceptibility of building materials

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Subjectbuilding materials; porosity; effects of frost; capillarity; frost resistance; Hygrothermal properties; materiau de construction; porosite; action du gel; capillarite; resistance au gel
AbstractIt is shown that the inability of water contained in pores to crystallize in situ leads to gradual and continuous redistribution of the adsorbate on cooling to below 0 degrees C. Frost damage occurs when the process cannot proceed because the amount of capillary water that is becoming unstable in unit time is greater than the flux. The established harmful effect of the intermediate-size pores, large sample dimensions, high degree of saturation and rapid cooling rate are to be expected. Correlation between nitrogen surface area and frost resistance of bricks was found to be good; this can also be explained by the theory.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number13730
NPARC number20373745
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Record identifierbb1a6c1e-75a5-4215-a684-5024a416bf6e
Record created2012-07-23
Record modified2016-05-09
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