Recent advances in understanding the role of supplementary cementitious materials in concrete

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1、CementandConcreteResearch78(2015)71–80ContentslistsavailableatScienceDirectCementandConcreteResearchjournalhomepage:http://ees.elsevier.com/CEMCON/default.aspRecentadvancesinunderstandingtheroleofsupplementarycementitiousmaterialsinconcretea,⁎,RafatSiddiquebMariaC.G.JuengeraTheUniversityo

2、fTexasatAustin,301E.DeanKeetonSt.,Austin,TX78712,USAbThaparUniversity,P.O.Box32,147004Patiala,IndiaarticleinfoabstractArticlehistory:Supplementarycementitiousmaterials(SCMs)arecommonlyusedinconcretemixturesasareplacementofaReceived29December2014portionofclinkerincementorasareplacementofap

3、ortionofcementinconcrete.ThispracticeisfavorableRevised26March2015totheindustry,generallyresultinginconcretewithlowercost,lowerenvironmentalimpact,higherlong-termAccepted30March2015strength,andimprovedlong-termdurability.SCMshavebeenusedinPortlandcementconcretefordecadesAvailableonline13A

4、pril2015andmanyoftheireffectsarewell-understood.MostrecentresearchonSCMshasfocusedonafewareas:exploringnewmaterials,increasingreplacementamounts,developingbettertestmethods,treatingormodifyingKeywords:Flyash(D)materials,andusingadditives(e.g.limestoneornanosilica)toimproveperformance.Thea

5、dvancesinknowledgeGranulatedblast-furnaceslag(D)providedbyresearchintheseareasarereviewedinthispaper,emphasizingtheimpactoftheresearchontheMetakaolin(D)field.Pozzolan(D)©2015ElsevierLtd.Allrightsreserved.Silicafume(D)1.Introductionthegoalofthisreviewpaper,researchonthesematerialsisdiscusse

6、dwhenfindingsareapplicabletoawiderrangeofSCMs.Supplementarycementitiousmaterials(SCMs),includingflyash,Thispapersummarizestheadvancesachievedinthepastfouryearsgroundgranulatedblastfurnaceslag,silicafume,calcinedclaysandnat-inourunderstandingofSCMuseinconcrete.Oneoftheprimaryreasonsuralpozzo

7、lans,arecommonlyblendedwithclinkertomakeportlandforSCMuseistoreducetheenvironmentalimpactofconcrete,andcementorusedasareplacementforaportionofportlandcementinrecentpublicationsonthistopicarereviewedfirst.Identifyingconcrete.ThepracticeofusingSCMsisincreasing,withthew