已冻损混凝土的二次冻融问题

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1、THERESEARCHABOUTFROZENDAMAGEDCONCRETEFORSECONDARYFREEZE-THAWLianglongandWukeandLeixiulingLianglong:GraduatedfromHarbinInstituteofTechnologyinorganicnon-metallicmaterialsmajor,Researchonconcreteantifreezefor15years.CEOofBeijingkingdomofscieneeandtechnologyLtdCo.materialengineerandIPMP,Telephone:135

2、52190597Wuke:seniorengineer;Researchfield:designofhydraulicstructureofcoal-firedpowerplant;Telephone:024-23147317unit:ChinaenergyconstructiongroupLiaoNingelectricsurveyanddesigninstituteCo.LTD.Leixiuling:materialengineer;Northeastwaterconservancyandhydropowersurveydesignco.LTDABSTRACTComparewithne

3、wconcrete,thefrozendamagedconcretewillbedegradedmorequicklythannewone.Differentfromthefreshconcrete,thefrozendamagedconcreteisbasedonthesolidifiedconcrete,Sotosolvetheproblemoffrozendamagedconcreteisdifferentfromthenewconcrete.BythewaysofmixingAir-entrainingagentormineraladmixtureisjustsuitforfres

4、hlymixconcrete,notforsolidifiedconcrete.Howtoenhancetheabilityofresistanceinthenextfreeze-thawismoreimportantforfrozendamagedconcrete.Whenthedamagehashappenedatbeginning,tostopitinstantaneouslywillbehelpfulnotonlyinreducingthespeedofdegradation,prolongingthelifeofconstructbutalsoavoidinglarge-scal

5、eandmending,savingcostsandloweringrunningcosts.Keywords:secondaiyfi*eeze-thawsinglesurfacefi*eeze-thawquickfreeze-thawsaltsolutionsolidifiedconcretefreshlymixconcreteINTRODUCTIONBecausethedesignforfrostresistanceoffrozendamagedconcreteisbasedonsolidifiedconcrete.soitisdifferentfromfreshlymixedconc

6、rete.bymeansofairentrainingadmixture,mineralblend,Cementtypesandsooncansatisfythedesignoffrostresistancerequirementsforfreshlymixedconcrete.butthesewaysarenotusefultosolidifiedconcrete.SoThedesignideasarethekeydifferences.Thedesignoffrostresistanceforfrozendamagedconcreteisbasedonsolidifiedconcret

7、e,andtheconcretehadbeendamagedyet.Sohowtostopthedeterioration,enhancetheabilityoffrostresistance,andprolongthelifetimeforstmeturearethepurposesofthisarticle.thereasontostudyitisbecauseitcansavemoneyandresources.P