ASTM D5249-95(2006)
(Specification)Standard Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland-Cement Concrete and Asphalt Joints
Standard Specification for Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland-Cement Concrete and Asphalt Joints
ABSTRACT
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.
SCOPE
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.
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.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D5249 – 95 (Reapproved 2006)
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 C670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
1.1 This specification covers backer material for cold- and
C1016 Test Method for Determination of WaterAbsorption
hot-applied joint sealant for use in portland-cement concrete or
of Sealant Backing (Joint Filler) Material
asphalt-pavement joints.
C1253 Test Method for Determining the Outgassing Poten-
1.2 This specification establishes basic requirements for
tial of Sealant Backing
sealant-backer material either in rod or strip form, that can
D545 Test Methods for Preformed Expansion Joint Fillers
withstand the temperature of hot- or cold-applied sealants
for Concrete Construction (Nonextruding and Resilient
without excessive deformation.
Types)
1.3 Sealant backer material serves one or more of the
D1622 Test Method forApparent Density of Rigid Cellular
following purposes:
Plastics
1.3.1 Limits the amount and depth of sealant applied to a
D1623 Test Method for Tensile and TensileAdhesion Prop-
joint,
erties of Rigid Cellular Plastics
1.3.2 Acts as a barrier interface to prevent backside adhe-
D5535 Terminology Relating to Formed-in-Place Sealants
sion (bondbreaker), and
for Joints and Cracks in Pavements
1.3.3 Provides a form to assist the sealant in developing a
E1 Specification for ASTM Liquid-in-Glass Thermometers
shape factor.
1.4 The values stated in inch-pound units are to be regarded
3. Terminology
as the standard. The values in parentheses are for information
3.1 For definitions, refer to Terminology D5535.
purposes only.
1.5 The following safety hazards caveat pertains only to the
4. Classification
test methods described in this specification. This standard does
4.1 Sealant backer material is available in three types:
not purport to address all of the safety concerns, if any,
4.1.1 Type 1, shall be round rods of various diameters
associated with its use. It is the responsibility of the user of this
intended for use with cold- and hot-applied sealants.
standard to establish appropriate safety and health practices
4.1.2 Type 2, shall be sheets or strips of various thicknesses,
and determine the applicability of regulatory limitations prior
laminated or skived by the manufacturer but capable of being
to use.
field laminated and used with cold- and hot-applied sealants.
2. Referenced Documents 4.1.3 Type 3, shall be round rods of various diameters
2 limited for use with cold-applied sealants.
2.1 ASTM Standards:
4.2 Type 1 and Type 3 rod materials are intended for use
primarily where there is a reservoir, either already existing or
This specification is under the jurisdiction of ASTM Committee D04 on Road
formed, such as a contraction joint, where the rod will limit the
and Paving Materials and is the direct responsibility of Subcommittee D04.33 on
sealant depth and prevent the sealant from bonding to the
Formed-In-Place Sealants for Joints and Cracks in Pavements.
bottom of the joint reservoir (bond-breaker) thus eliminating
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1992. Last previous edition approved in 2000 as D5249 – 95 (2000). bottom-side adhesion.
DOI: 10.1520/D5249-95R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Withdrawn. The last approved version of this historical standard is referenced
the ASTM website. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D5249 – 95 (2006)
4.3 Type 2 strip material is intended primarily for use where 9.2 Density—Tests for density of Types 1 and 3 materials
there is an opening the full depth of the pavement, such as an shallbemadeinaccordancewithTestMethodD1622.Testsfor
expansionjointforwhichitisdesirabletohaveafillermaterial density of Type 2 material shall be made in accordance with
completely fill the opening and prevent or minimize the Test Methods D545.
accumulation of water or incompressible materials below the 9.3 Tensile Strength— Tests for tensile strength of Types 1
sealant. and 3 materials shall be made in accordance with Test Method
D1623.
5. Ordering Information
9.4 Compression Deflection and Recovery—Type2material
shall be tested in accordance with Test Methods D545. Type 1
5.1 Types1,2,and3backermaterialareavailableinarange
of sizes, lengths, and diameters; they are available on reels, in and3materialsshallbetestedinaccordancewiththefollowing
procedure.
coils, or in straight lengths. Consult the manufacturer for
information on how to order. 9.4.1 Significance and Use—This test method covers a
procedure for measuring the force necessary to compress the
5.2 Backer material must be ordered by diameter or size in
relation to the joint opening, usually 25 to 35 % larger than the backer material, and the percentage recovery of original
dimensions after removal of the compression load.
joint width.
9.4.2 Apparatus:
6. Materials
9.4.2.1 An apparatus shall be provided having a flat com-
pression plate larger than the specimen to be tested, connected
6.1 Sealant backer material shall be easily compressed and
to a force measuring device, and mounted in such a manner
installed in the joint reservoir. This material shall be heat
that the specimen can be deflected (compressed) at a speed of
resistant when used with hot-applied sealants.
0.5 to 2 in./min. The apparatus shall be arranged to support the
7. Physical Properties specimen on a level horizontal plate. The apparatus shall be
capable of measuring the distance between the movable plate
7.1 Physical properties of the sealant backer material shall
and the stationary plate.
conform to the requirements of Table 1.
9.4.2.2 Calipers, capable of measuring 0.001 in.
8. Workmanship, Finish, and Appearance 9.4.3 Test Specimens:
9.4.3.1 Test specimens shall be 6 6 0.125 in. lengths of the
8.1 The product shall be clean, free of scale or foreign
backer material.
matter, oil, or water which could wipe off on a joint sidewall
9.4.3.2 Each test requires a minimum effective area of 3.0
and interfere with the proper cure or adhesion of the sealant.
2 2
in. Whentheeffectiveareaofasinglelengthislessthan3in. ,
9. Test Methods multiplelengthsshallbeusedinasingletest.Whenrod-shaped
backer material is less than ⁄4 in. in diameter, multiple lengths
9.1 Water Absorption— Tests for water absorption of the
are required for each test (see Table 2).
Types 1 and 3 backing material shall be made in accordance
withTestMethodC1016,ProcedureB.Type2materialshallbe
tested in accordance with Test Method D545.
TABLE 2 Multiple Specimen Requirements for Rod-Shaped
9.1.1 For Type 2 material:
Backer Materials for Compression Recovery Testing
W 3 100
Specimens Required for Each
WA 5 (1)
Rod Diameter
262t
Test
⁄4 in. or larger 1
where:
3 5
⁄8 to ⁄8 in. 2
WA = water absorption by volume, %,
< ⁄8 in. 3
W = weight of water absorbed, from tests made according
to Test Methods D545,g,and
t = thickness of 4 in. by 4 in. specimen, inches.
9.1.2 For the purposes of this calculation,1gof water
9.4.4 Number of Test Specimens—Test three specimens for
occupies 0.061 in. at test conditions. each sample. The values reported shall be the mean of those
observed.
9.4.5 Procedure:
TABLE 1 Physical Property Requirements
9.4.5.1 Place the test specimen in the center of the support-
Property Type 1 Type 2 Type 3
ing plate of the apparatus. Materials that are supplied in coils
3 3
Density, lb/ft (kg/m ), max 6 (96.1) 4 (64.1) 6 (96.1)
often have a tendency to curl. Place these samples between the
Tensile strength, psi (kgf/cm ), 20 (1.41) N/A 20 (1.41)
plates in such a manner that the arc formed by the sample is in
min
Water absorption, by volume, 0.5 0.5 0.5
the vertical plane.
%, max
25 % Compression deflection 15 (1.06) 15 (1.06) 15 (1.06)
force, psi (kgf/cm ), max
Compression recovery, %, min 90 90 90
BrownandSharpModel579-1orequivalenthasbeenfoundsuitable.Ifyouare
Heat resistance, °F 392 6 5 39265N/A
aware of alternative suppliers, please provide this information to ASTM Interna-
°C 200 6 2.8 200 6 2.8 N/A
Maximum shrinkage, % 10 % 10 % N/A tional Headquarters
...
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