ASTM D5249-10(2021)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D5249 −10 (Reapproved 2021)
Standard Specification for
Backer Material for Use with Cold- and Hot-Applied Joint
Sealants in Portland Cement Concrete and Asphalt Joints
This standard is issued under the fixed designation D5249; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers backer material for cold- and
C670 Practice for Preparing Precision and Bias Statements
hot-applied joint sealant for use in portland cement concrete or
for Test Methods for Construction Materials
asphalt pavement joints.
C1016 Test Method for Determination of Water Absorption
1.2 This specification establishes basic requirements for
of Sealant Backing (Joint Filler) Material
sealant backer material, either in rod or strip form, that can
C1253 Test Method for Determining the Outgassing Poten-
withstand the temperature of hot- or cold-applied sealants
tial of Sealant Backing
without excessive deformation.
D545 Test Methods for Preformed Expansion Joint Fillers
for Concrete Construction (Nonextruding and Resilient
1.3 Sealant backer material serves one or more of the
Types)
following purposes:
D1622 Test Method for Apparent Density of Rigid Cellular
1.3.1 Limits the amount and depth of sealant applied to a
Plastics
joint,
D1623 Test Method for Tensile and Tensile Adhesion Prop-
1.3.2 Acts as a barrier interface to prevent backside adhe-
erties of Rigid Cellular Plastics
sion (bond breaker), and
D5535 Terminology Relating to Formed-in-Place Sealants
1.3.3 Provides a form to assist the sealant in developing a
for Joints and Cracks in Pavements (Withdrawn 2009)
shape factor. E1 Specification for ASTM Liquid-in-Glass Thermometers
E220 Test Method for Calibration of Thermocouples By
1.4 The values stated in inch-pound units are to be regarded
Comparison Techniques
as the standard. The values in parentheses are for information
purposes only.
3. Terminology
1.5 The following safety hazards caveat pertains only to the
3.1 For definitions, refer to Terminology D5535.
test methods described in this specification. This standard does
not purport to address all of the safety concerns, if any, 4. Classification
associated with its use. It is the responsibility of the user of this
4.1 Sealant backer material is available in three types:
standard to establish appropriate safety, health, and environ-
4.1.1 Type 1, shall be round rods of various diameters
mental practices and determine the applicability of regulatory
intended for use with cold- and hot-applied sealants.
limitations prior to use.
4.1.2 Type 2, shall be sheets or strips of various thicknesses,
1.6 This international standard was developed in accor-
laminated or skived by the manufacturer but capable of being
dance with internationally recognized principles on standard-
field laminated and used with cold- and hot-applied sealants.
ization established in the Decision on Principles for the
4.1.3 Type 3, shall be round rods of various diameters
Development of International Standards, Guides and Recom-
limited for use with cold-applied sealants.
mendations issued by the World Trade Organization Technical
4.2 Type 1 and Type 3 rod materials are intended for use
Barriers to Trade (TBT) Committee.
primarily where there is a reservoir, either already existing or
1 2
This specification is under the jurisdiction of ASTM Committee D04 on Road For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Paving Materials and is the direct responsibility of Subcommittee D04.33 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Formed In-Place Sealants for Joints and Cracks in Pavements. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2021. Published May 2021. Originally the ASTM website.
approved in 1992. Last previous edition approved in 2016 as D5249 – 10 (2016). The last approved version of this historical standard is referenced on
DOI: 10.1520/D5249-10R21. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5249−10 (2021)
formed, such as a contraction joint, where the rod will limit the where:
sealant depth and prevent the sealant from bonding to the
WA = water absorption by volume, %,
bottom of the joint reservoir (bond breaker) thus eliminating
W = weightofwaterabsorbedfromtestsmadeaccordingto
bottom-side adhesion.
Test Methods D545,g,and
t = thickness of 4 in. by 4 in. specimen, inches.
4.3 Type 2 strip material is intended primarily for use where
there is an opening the full depth of the pavement, such as an 9.1.2 For the purposes of this calculation,1gof water
expansionjointforwhichitisdesirabletohaveafillermaterial
occupies 0.061 in. at test conditions.
completely fill the opening and prevent or minimize the
9.2 Density—Tests for density of Types 1 and 3 materials
accumulation of water or incompressible materials below the
shallbemadeinaccordancewithTestMethodD1622.Testsfor
sealant.
density of Type 2 material shall be made in accordance with
Test Methods D545.
5. Ordering Information
9.3 Tensile Strength—Tests for tensile strength of Types 1
5.1 Types1,2,and3backermaterialareavailableinarange
and 3 materials shall be made in accordance with Test Method
of sizes, lengths, and diameters; they are available on reels, in
D1623.
coils, or in straight lengths. Consult the manufacturer for
9.4 Compression Deflection and Recovery—Type 2 material
information on how to order.
shall be tested in accordance withTest Methods D545.Types 1
5.2 Backer material must be ordered by diameter or size in
and3materialsshallbetestedinaccordancewiththefollowing
relation to the joint opening, usually 25 to 35 % larger than the
procedure.
joint width.
9.4.1 Significance and Use—This test method covers a
procedure for measuring the force necessary to compress the
6. Materials
backer material, and the percentage recovery of original
6.1 Sealant backer material shall be easily compressed and
dimensions after removal of the compression load.
installed in the joint reservoir. This material shall be heat
9.4.2 Apparatus:
resistant when used with hot-applied sealants.
9.4.2.1 An apparatus shall be provided having a flat com-
pression plate larger than the specimen to be tested, connected
7. Physical Properties
to a force measuring device, and mounted in such a manner
7.1 Physical properties of the sealant backer material shall
that the specimen can be deflected (compressed) at a speed of
conform to the requirements of Table 1.
0.5 to 2 in./min. The apparatus shall be arranged to support the
specimen on a level horizontal plate. The apparatus shall be
8. Workmanship, Finish, and Appearance
capable of measuring the distance between the movable plate
8.1 The product shall be clean and free of scale or foreign
and the stationary plate.
matter, oil, or water which could wipe off on a joint sidewall
9.4.2.2 Calipers, capable of measuring 0.001 in.
and interfere with the proper cure or adhesion of the sealant.
9.4.3 Test Specimens:
9.4.3.1 Test specimens shall be 6 6 0.125 in. lengths of the
9. Test Methods
backer material.
9.1 Water Absorption—Tests for water absorption of the
9.4.3.2 Each test requires a minimum effective area of
Types 1 and 3 backing material shall be made in accordance
3.0 in. . When the effective area of a single length is less than
withTestMethodC1016,ProcedureB.Type2materialshallbe
3 in. , multiple lengths shall be used in a single test. When
tested in accordance with Test Methods D545.
rod-shaped backer material is less than ⁄4 in. in diameter,
9.1.1 For Type 2 material:
multiple lengths are required for each test (see Table 2).
9.4.4 Number of Test Specimens—Test three specimens for
W 3100
WA 5 (1)
each sample. The values reported shall be the mean of those
262t
observed.
TABLE 1 Physical Property Requirements BrownandSharpModel579-1orequivalenthasbeenfoundsuitable.Ifyouare
aware of alternative suppliers, please provide this information to ASTM Interna-
Property Type 1 Type 2 Type 3
tional Headquarters.Your comments will receive careful consideration at a meeting
3 3
Density, lb/ft (kg/m ), max 6 (96.1) 4 (64.1) 6 (96.1)
of the responsible technical committee, which you may attend.
Tensile strength, psi (kgf/cm ), 20 (1.41) N/A 20 (1.41)
min
Water absorption, by volume, 0.5 0.5 0.5 TABLE 2 Multiple Specimen Requirements for Rod-Shaped
%, max
Backer Materials for Compression Recovery Testing
25 % Compression deflection 15 (1.06) 15 (1.06) 15 (1.06)
2 Specimens Required for Each
force, psi (kgf/cm ), max
Rod Diameter
Test
Compression recovery, %, min 90 90 90
Heat resistance, °F 392 ± 5 392± 5 N/A ⁄4 in. or larger 1
3 5
°C 200 ± 2.8 200 ± 2.8 N/A ⁄8 to ⁄8 in. 2
Maximum shrinkage, % 10 % 10 % N/A < ⁄8 in. 3
D5249−10 (2021)
9.4.5 Procedure: 9.5 Heat Resistance for Types
...