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This specification covers backer material, either in rod or strip form, for use with cold- and hot-applied joint sealant in portland-cement concrete or asphalt-pavement joints. Sealant backer material is available in three types: Type I, Type II, and Type III, and serves one or more of the following purposes: (1) limits the amount and depth of sealant applied to a joint, (2) acts as a barrier interface to prevent backside adhesion (bondbreaker), and (3) provides a form to assist the sealant in developing a shape factor. The material shall be easily compressed and installed in the joint reservoir and shall be heat resistant when used with hot-applied sealants. Physical properties of the material shall conform to the specified requirements for (1) density, (2) tensile strength, (3) water absorption, (3) compression deflection force, (4) compression recovery, (5) heat resistance, and (6) maximum shrinkage. The test specimen, test procedure, apparatus, and calculations for the physical properties enumerated are detailed.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers backer material for cold- and hot-applied joint sealant for use in portland-cement concrete or asphalt-pavement joints.
1.2 This specification establishes basic requirements for sealant-backer material either in rod or strip form, that can withstand the temperature of hot- or cold-applied sealants without excessive deformation.
1.3 Sealant backer material serves one or more of the following purposes:
1.3.1 Limits the amount and depth of sealant applied to a joint,
1.3.2 Acts as a barrier interface to prevent backside adhesion (bondbreaker), and
1.3.3 Provides a form to assist the sealant in developing a shape factor.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information purposes only.
1.5 The following safety hazards caveat pertains only to the test methods described in this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
C1016 Test Method for Determination of Water Absorption of Sealant Backing (Joint Filler) Material
C1253 Test Method for Determining the Outgassing Potential of Sealant Backing
D545 Test Methods for Preformed Expansion Joint Fillers for Concrete Construction (Nonextruding and Resilient Types)
D1622 Test Method for Apparent Density of Rigid Cellular Plastics
D1623 Test Method for Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
D5535 Terminology Relating to Formed-in-Place Sealants for Joints and Cracks in Pavements
E1 Specification for ASTM Liquid-in-Glass Thermometers
E220 Test Method for Calibration of Thermocouples By Comparison Techniques
ICS Number Code 91.100.50 (Binders. Sealing materials)
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ASTM D5249-10(2016), Standard Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland-Cement Concrete and Asphalt Joints, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top