Designation:C1645−16StandardTestMethodforFreeze-thawandDe-icingSaltDurabilityofSolidConcreteInterlockingPavingUnits1ThisstandardisissuedunderthefixeddesignationC1645;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1ThistestmethodevaluatestheresistancetofreezingandthawingofsolidinterlockingconcretepavingunitsconformingtothedimensionalrequirementsofSpecificationC936/C936M.Unitsaretestedinatestsolutionthatiseithertapwateror3%salinesolution,dependingontheintendeduseoftheunitsinactualservice.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Inch-poundunitsaregiveninparenthesesfortempera-turespecificationandareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,inany,associatedwithitsuse.Itistheresponsibilityoftheuseofthisstandardtoestablishappropri-atesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationpriortouse.2.ReferencedDocuments2.1ASTMStandards:2C936/C936MSpecificationforSolidConcreteInterlockingPavingUnits3.SignificanceandUse3.1ThistestmethodisintendedtodeterminetheeffectsoffreezingandthawingonunitsconformingtothedimensionalrequirementsofSpecificationC936/C936Mwhileimmersedinatestsolution.OthertypesofsegmentalconcretepavingunitsthatdonotconformtothedimensionalrequirementsofSpecificationC936/C936Mmaybetestedusingthistestmethod.3.2Theresultsfromthistestmethodarenotintendedtoprovideaquantitativemeasureofthelengthofservicefromconcretepavingunitsconformingtothedimensionalrequire-mentsofSpecificationC936/C936M.4.Apparatus4.1Freezing-and-ThawingApparatus—Thefreezingappa-ratusshallconsistofsuitablecabinetorcoldroomwithcontrolstoreachandmaintainwithin1hofintroductionofspecimensanairtemperatureof−563°C(2365°F)atalllocationswithinthechamberregar...
