Significance of microhardness of porous inorganic materials

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Journal titleCement and Concrete Research
Pages717729; # of pages: 13
Subjectinorganic materials; porosity; mechanical properties; Concrete; materiau mineral; porosite; propriete mecanique
AbstractMicrohardness was measured of porous and nonporous samples of halite and selenite and it has been shown that the relationship between microhardness and porosity may be expressed by the emperical relation H = H[o]e[-bp]. The significance of the microhardness measurements as applied to porous materials is discussed from the standpoint of the disturbed zone of crystals or micro-units, including the problem of "work hardening" when powdered samples are compacted. The effect of morphology on microhardness is also discussed with regard to a series of gypsum samples. Reference is made to the effect of humidity on microhardness of porous glass and the conclusion drawn that the micromechanics of failure in microhardness are similar to flexure strength.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number12831
NPARC number20374010
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Record identifier430336c5-ebff-4596-95bd-c17000f3ca85
Record created2012-07-23
Record modified2016-05-09
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