Designation:C1666/C1666M−08(Reapproved2015)StandardSpecificationforAlkaliResistant(AR)GlassFiberforGFRCandFiber-ReinforcedConcreteandCement1ThisstandardisissuedunderthefixeddesignationC1666/C1666M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversminimumrequirementsforalkaliresistant(AR)glassfibersintendedforuseinglassfiber-reinforcedconcrete(GFRC)byspray-up,glassfiber-reinforcedconcretepremix,fiber-reinforcedconcrete,andothercementitiousbasedproducts.1.2ThisspecificationprovidesforARglassfibertypesandconfigurationsthatcanbereadilyincorporatedintoconcretemixes,typicalphysicalproperties,minimumzirconiacontent,andprescribestestingprocedurestoestablishconformancetotheserequirements.1.3Thisspecificationdoesnotaddressthetypesofcoatingsorlubricantsusedinthemanufacturingprocessofthefibers.1.4Inthecaseofconflictbetweenamorestringentrequire-mentofaproductspecificationandarequirementofthisspecification,theproductspecificationshallprevail.Inthecaseofaconflictbetweenarequirementoftheproductspecificationorarequirementofthisspecificationandamorestringentrequirementofthepurchaseorder,thepurchaseordershallprevail.Thepurchaseorderrequirementsshallnottakeprece-denceifthey,inanyway,violatetherequirementsoftheproductspecificationorthisspecification;forexample,bythewaivingofatestrequirementorbymakingatestrequirementlessstringent.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilit...
