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1、ConstructionandBuildingMaterials188(2018)898–904ContentslistsavailableatScienceDirectConstructionandBuildingMaterialsjournalhomepage:www.elsevier.com/locate/conbuildmatTechnicalnoteInfluenceofdryiceontheperformanceofPortlandcementanditsmechanismYuliWang,Fen
2、gxiaHe,LeiYang⇑SchoolofMaterialsScienceandEngineering,HenanPolytechnicUniversity,Jiaozuo,Henan454003,PRChinahighlightsThestandardconsistencyandthesettingtimeofdryiceonPortlandcementwerestudied.ThedryicecanbetterimprovethecompressivestrengthofPortlandceme
3、ntpasteat28days.ThedryiceretardstheearlyhydrationofPortlandcementandimprovesthelaterhydration.ResultsprovideareferenceforfutureapplicationofdryiceinPortlandcement-basedmaterials.articleinfoabstractArticlehistory:Thisstudyreportsontheeffectofdryiceonthehy
4、drationandhardeningbehaviorofPortlandcement.Received6June2018DryicewasdirectlyaddedtofreshPortlandcementpaste,withitsdosagefixedat0wt%,0.3wt%,0.6wtReceivedinrevisedform7August2018%,0.9wt%,1.2wt%and1.5wt%.Resultsshowedthatdryicehadlittleeffectonthestandardco
5、nsistencyAccepted17August2018andsettingtimeofcementpastewhenitsdosagewaslessthan0.9wt%,butotherwisethestandardcon-sistencyaswellasthesettingtimewasincreased.Thecompressivestrengthofthepasteat7daysincreasedslightlywhenthedosageofdryicewaslessthan0.9wt%,butt
6、hecompressivestrengthwasKeywords:reducedwiththeadditionof0.9wt%to1.5wt%dryice.Forthecompressivestrengthat28days,theDryicecementpastewith0.6wt%dryiceshowedthegreatestvalue,beingincreasedby30.9%comparedtoPortlandcementHydrationthecontrolcementpaste,andthecom
7、pressivestrengthofthesampleswithdryicewasallhigherthanSettingtimethatofthecontrol.Inaddition,hydrationheat,XRD,DTA-TGandSEMresultsshowedthattheincorpo-CompressivestrengthrationofdryiceretardedtheearlyhydrationofPortlandcement,improveditslaterhydration,ando
8、pti-mizedthehardenedstructureofthecementpaste.TheseresultscanprovideareferenceforthefutureapplicationofdryiceinPortlandcement-basedmaterials.Ó2018ElsevierLtd.Allrightsreserved.1.Introductiontocarbonateaschemi
