Effect of humidity and porosity on fracture of hardened portland cement

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DOIResolve DOI: http://doi.org/10.1016/0008-8846(82)90033-3
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TypeArticle
Journal titleCement and Concrete Research
ISSN0008-8846
Volume12
IssueNovember 6
Pages705716; # of pages: 12
Subjectportland cement; breakage; relative humidity; porosity; hydration; hcp; drying history effects; meniscus effects; aging; moisture assisted-stress corrosion processes; Concrete; ciment portland; rupture (fracture); humidite relative; porosite; hydratation
AbstractThe dependence of fracture mechanics terms (gamma[T], K[c], G[c] and J[c]) on relative humidity and porosity is determined for hardened portland cement paste (HCP). The cardinal features of the fracture term/humidity curves and fracture term/porosity curves are discussed. Large hysteresis in fracture term/relative humidity curves is observed, the magnitude depending on the drying history of HCP. Meniscus effects, aging and moisture-assisted stress corrosion processes are thought to contribute to fracture of HCP. Unhydrated portland cement, Ca(OH)[2] particles, and pores with specific size distributions in the HCP system possibly act as crack arrestors.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
IdentifierDBR-P-1057
NRC number20677
3777
NPARC number20375754
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Record identifier0214f5d1-ceac-4ca0-baf7-df077e048dde
Record created2012-07-23
Record modified2016-05-09
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