Title of article
Effectoftemperatureonstructuralqualityofthecementpasteandhigh-strengthconcretewithsilicafumeOriginalResearchArticle
Author/Authors
IvanJanotka، نويسنده , , TereziaNürnbergerov?، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
14
From page
2019
To page
2032
Abstract
Experimentalinvestigationconductedtostudythethermo-mechanicalpropertiesofconcreteatTemelin(CzechRepublic),Mochovce(Slovakia),andPenly(France)nuclearpowerplantsrevealsstructuralintegritydegradationbetween100and200°Cduetobothalossofwaterboundinhydratedcementmineralsandsubsequentlyairvoidformation.Testresultsindicatechangesinstrength,averageporeradiusandcalculatedpermeabilitycoefficientsforMochovcespecimensexposedtotemperaturesupto400°C.Itdemonstratesthatthepermeabilitycoefficientmeasuredonthebasisofporesizesusingmercuryintrusionporosimetryissuitabletechniquefortheevaluationofconcretequality.Itconfirmsthatstrengthandpermeabilitycoefficientareequivalentstructuralqualityvariablesofconcrete.At400°Cgel-likehydrationproductsaredecomposed,at600°CCa(OH)2isdehydroxylated,andCaCO3dissociationtoCaOandCO2accompaniedwiththere-crystallisationofnon-bindingphasesfromhydratedcementunderre-combustionaredominantprocessesbetween600and800°C.Thisstageofconcreteischaracterisedbythecollapseofitsstructuralintegrity,revealingresidualcompressivestrength.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2005
Journal title
Nuclear Engineering and Design Eslah
Record number
895925
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