1、Designation:D524910Standard Specification forBacker Material for Use with Cold-and Hot-Applied JointSealants in Portland-Cement Concrete and Asphalt Joints1This standard is issued under the fixed designation D5249;the number immediately following the designation indicates the year oforiginal adoptio
2、n or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers backer material for cold-andhot-applied joint sealant fo
3、r use in portland-cement concrete orasphalt-pavement joints.1.2 This specification establishes basic requirements forsealant-backer material either in rod or strip form,that canwithstand the temperature of hot-or cold-applied sealantswithout excessive deformation.1.3 Sealant backer material serves o
4、ne or more of thefollowing purposes:1.3.1 Limits the amount and depth of sealant applied to ajoint,1.3.2 Acts as a barrier interface to prevent backside adhe-sion(bondbreaker),and1.3.3 Provides a form to assist the sealant in developing ashape factor.1.4 The values stated in inch-pound units are to
5、be regardedas the standard.The values in parentheses are for informationpurposes only.1.5 The following safety hazards caveat pertains only to thetest methods described in this specification.This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the
6、responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Ma
7、terialsC1016 Test Method for Determination of Water Absorptionof Sealant Backing(Joint Filler)MaterialC1253 Test Method for Determining the Outgassing Poten-tial of Sealant BackingD545 Test Methods for Preformed Expansion Joint Fillersfor Concrete Construction(Nonextruding and ResilientTypes)D1622 T
8、est Method for Apparent Density of Rigid CellularPlasticsD1623 Test Method for Tensile and Tensile Adhesion Prop-erties of Rigid Cellular PlasticsD5535 Terminology Relating to Formed-in-Place Sealantsfor Joints and Cracks in Pavements(Withdrawn 2009)3E1 Specification for ASTM Liquid-in-Glass Thermom
9、etersE220 Test Method for Calibration of Thermocouples ByComparison Techniques3.Terminology3.1 For definitions,refer to Terminology D5535.4.Classification4.1 Sealant backer material is available in three types:4.1.1 Type 1,shall be round rods of various diametersintended for use with cold-and hot-ap
10、plied sealants.4.1.2 Type 2,shall be sheets or strips of various thicknesses,laminated or skived by the manufacturer but capable of beingfield laminated and used with cold-and hot-applied sealants.4.1.3 Type 3,shall be round rods of various diameterslimited for use with cold-applied sealants.4.2 Typ
11、e 1 and Type 3 rod materials are intended for useprimarily where there is a reservoir,either already existing orformed,such as a contraction joint,where the rod will limit thesealant depth and prevent the sealant from bonding to thebottom of the joint reservoir(bond-breaker)thus eliminatingbottom-si
12、de adhesion.4.3 Type 2 strip material is intended primarily for use wherethere is an opening the full depth of the pavement,such as anexpansion joint for which it is desirable to have a filler material1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and
13、 is the direct responsibility of Subcommittee D04.33 onFormed In-Place Sealants for Joints and Cracks in Pavements.Current edition approved Dec.1,2010.Published December 2010.Originallyapproved in 1992.Last previous edition approved in 2006 as D5249 95(2006).DOI:10.1520/D5249-10.2For referenced ASTM
14、 standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Co
15、pyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 completely fill the opening and prevent or minimize theaccumulation of water or incompressible materials below thesealant.5.Ordering Information5.1 Types 1,2,and 3 backer material are availabl
16、e in a rangeof sizes,lengths,and diameters;they are available on reels,incoils,or in straight lengths.Consult the manufacturer forinformation on how to order.5.2 Backer material must be ordered by diameter or size inrelation to the joint opening,usually 25 to 35%larger than thejoint width.6.Materials6.1 Sealant backer material shall be easily compressed andinstalled in the joint reservoir.This material shall be heatresistant when used with hot-applied sealants.7.Physical Properties7.1 Physical p
