ASTM D3542-08(2013)
(Specification)Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Bridges
Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for Bridges
ABSTRACT
This specification covers the material requirements for preformed polychloroprene elastomeric joint seals proposed for use in bridges. The multiple-web seals function by compression of the seal between the faces of the joint with the seal folding inward at the top. The seal is installed with a lubricant and is designed to seal the joint and reject incompressibles. The materials shall also conform to the physical properties prescribed herein such as tensile strength, elongation, hardness, ozone resistance, low-temperature recovery, high-temperature recovery, and compression-deflection properties.
SCOPE
1.1 This specification covers the material requirements for preformed polychloroprene elastomeric joint seals for bridges. The seal consists of a multiple-web design composed of polychloroprene and functions only by compression of the seal between the faces of the joint with the seal folding inward at the top to facilitate compression. The seal is installed with a lubricant adhesive and is designed to seal the joint and reject incompressibles. Note 1—This specification may not be applicable for seals whose height is less than 90 % of its nominal width.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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)
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Designation:D3542 −08 (Reapproved 2013)
Standard Specification for
Preformed Polychloroprene Elastomeric Joint Seals for
Bridges
This standard is issued under the fixed designation D3542; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D575Test Methods for Rubber Properties in Compression
D1149Test Methods for Rubber Deterioration—Cracking in
1.1 This specification covers the material requirements for
an Ozone Controlled Environment
preformed polychloroprene elastomeric joint seals for bridges.
D2240Test Method for Rubber Property—Durometer Hard-
The seal consists of a multiple-web design composed of
ness
polychloropreneandfunctionsonlybycompressionoftheseal
D3040Practice for Preparing Precision Statements for Stan-
between the faces of the joint with the seal folding inward at
dards Related to Rubber and Rubber Testing (Withdrawn
the top to facilitate compression. The seal is installed with a
1987)
lubricant adhesive and is designed to seal the joint and reject
incompressibles.
3. Marking and Ordering Information
NOTE 1—This specification may not be applicable for seals whose
3.1 Each lot of seal shall be marked with characters of not
height is less than 90% of its nominal width.
less than 0.25 in. (6.35 mm) in height on the top of the seal at
1.2 The values stated in inch-pound units are to be regarded
a maximum of 4 ft (1.22 m) intervals showing the lot number,
as standard. The values given in parentheses are mathematical
date of manufacture, and the manufacturing seal designation.
conversions to SI units that are provided for information only
Thesealshallalsohavediemarkingswhichareregisteredwith
and are not considered standard.
the Rubber Manufacturers Association (RMA).
1.3 This standard does not purport to address all of the
3.2 The purchaser shall specify the anticipated required
safety concerns, if any, associated with its use. It is the
minimum acceptable joint movement, and either the minimum
responsibility of the user of this standard to establish appro-
joint opening, or the nominal width of seal.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Materials and Manufacture
2. Referenced Documents
4.1 The seals shall be preformed, and the material shall be
vulcanized elastomeric compound using virgin polychloro-
2.1 ASTM Standards:
prene as the only polymer.
D395Test Methods for Rubber Property—Compression Set
D412TestMethodsforVulcanizedRubberandThermoplas-
5. Physical Requirements
tic Elastomers—Tension
D471Test Method for Rubber Property—Effect of Liquids
5.1 The materials shall conform to the physical properties
D518 Test Method for Rubber Deterioration—Surface
prescribed in Table 1.
Cracking (Withdrawn 2007)
5.2 In the applicable requirements of Table 1 and the test
D573Test Method for Rubber—Deterioration in an Air
methods, all deflection shall be based on the nominal width.
Oven
6. Dimensions and Working Parameters
This specification is under the jurisdiction ofASTM Committee D04 on Road
6.1 The size, shape and dimensional tolerances shall be as
and Paving Materials and is the direct responsibility of Subcommittee D04.34 on
Preformed Joint Fillers, Sealers and Sealing Systems.
outlined in 6.1.1.
Current edition approved Sept. 1, 2013. Published November 2013. Originally
6.1.1 Measurements used for laboratory testing shall be
approved in 1976. Last previous edition approved in 2008 as D3542–08. DOI:
taken to the nearest 0.01 in. (0.3 mm) and reported/recorded to
10.1520/D3542-08R13.
the nearest 0.1 in. (3 mm) as the average of three measure-
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
ments.Themeasuredwidthshallbegreaterthanorequaltothe
Standards volume information, refer to the standard’s Document Summary page on
nominal width. The seal height shall not be less than 90% of
the ASTM website.
3 the nominal width unless joint recess dimensions or special
The last approved version of this historical standard is referenced on
www.astm.org. design considerations dictate the geometry.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3542−08 (2013)
TABLE 1 Physical Requirements for Preformed Elastomeric Joint Seals
Requirements ASTM Test Method
Tensile strength, min, psi (MPa) 2000 (13.8) D412
Elongation at break, min, % 250 D412
A
Hardness, Type A durometer, points 55 ± 5 D2240 (modified)
Oven aging, 70 h at 212°F (100°C)
Tensile strength, max, % loss 20
Elongation, max, % loss 20
Hardness, Type A durometer, points change 0 to 10
Oil swell, ASTM Oil No. 3, 70 h at 212°F:
70 h at 212°F (100°C)
Weight change, max, % 45 D471
B C
Ozone resistance no cracks D1149
20 % strain, 300 pphm in air, 70 h, at 104°F (40°C) (wiped with toluene to remove surface
contamination)
Low-temperature recovery,
72 h at 14°F (−10°C), 50 percent:
D
Deflection, min, % 88 Section 8.2
Low-temperature recovery,
22 h at − 20°F (−29°C), 50 %:
D
Deflection, min, % 83 Section 8.2
High-temperature recovery,
70 h, at 212°F (100°C), 50 %:
D
Deflection, min, % 85 Section 8.2
Compression-deflection properties:
E
LC min in. (mm) See 8.3.5 D575 Method A (modified)
LC max in. (mm) See 8.3.5
Movement range, in. (mm) See 8.3.5
A
The term “modified” in the table relates to the specimen preparation. The use of the joint seal as the specimen source requires that more plies than specified in either
ofthemodifiedtestproceduresbeused.Suchspecimenmodificationshallbeagreeduponbetweenthepurchaserandthesupplierpriortotesting.Thehardnesstestshall
be made with the durometer in a durometer stand as recommended in Test Method D2240.
B
Sample prepared in accordance with Method A of Test Method D518.
C
Cracking, splitting, or sticking of a specimen during a recovery test shall mean that the specimen has failed the test.
D
The reference section and subsections are those of this specification. The values found in 6.2.2, 6.2.3, and 6.2.4 shall be within the range specified by the purchaser
in 3.2.
E
Speed of testing shall be 0.5 ± 0.05 in. (13 ± 1.3 mm), min at room temperature of 73 ± 4°F (23 ± 2.2°C). The sheets of sandpaper are not used.
of nominal width, the LC min equals 70%.
6.2 Compression Deflection Properties—The contact pres-
sure expressed in pounds-force per square inch (or pascals)
6.2.3 The maximum limit of compressibility (LC max) is
when the seal is compressed to any particular width indicates
definedasthecompressedwidth(expressedintermsofpercent
the stress-strain relationship that exists in the seal. This
ofnominalwidth)correspondingtoacontactpressureof35psi
relationship is dependent on both the properties of the elasto-
(241.32 kPa). The LC max shall be determined in accordance
mer and the cross-sectional configuration of the seal.
with 9.3. LC max has been designated at 35 psi (241.32 kPa)
Therefore, for a predetermined allowable pressure, a definitive
inordertomitigatethetendenciestowardpressuredecayofthe
relationshipwillexistandtheworkinglimitsofthesealmaybe
seal during use. A reading of 35 psi is considered an absolute
defined.
maximum pressure which should not be exceeded.
6.2.1 The working limits (minimum and maximum degrees
6.2.4 The movement range of the seal is defined as the
of compression) of the seal shall be determined on the basis of
numerical difference between the LC min and the LC max
the minimum and maximum limits of compressibility (LC min
expressed in inches (mm). For the purpose of calculating the
andLCmax),andthemovementrangeasspecifiedherein.The
movement range, a value at 85% shall be used for LC min
purchaser shall specify the movement range, anticipated maxi-
when the measured value of LC min exceeds 85%. For
mum joint opening and the target nominal width of seal. Seals
purposes of acceptance testing, the calculated movement range
with nominal width differing from that specified are
of the seal shall not be less than the specified value by more
acceptable, providing the compressed width at LC max is less
than 5%.
thantheminimumanticipatedjointopening,andthemovement
range requirement is met.
7. Sampling
6.2.2 The minimum limit of compressibility (LC min) is
7.1 Alot shall consist of the quantity for each cross section
definedasthecompressedwidth(expressedintermsofpercent
agreed upon between the purchaser and the supplier.
of nominal width) corresponding to a contact pressure of 3 psi
7.2 Samplesshallbetakenatrandomfromeachshipmentof
(20.68 kPa). The LC min shall be determined in accordance
material.Iftheshipmentconsistsofmorethanonelot,eachlot
with 9.3. For the purpose of calculating movement range, a
shall be sampled.
valueat85%ofnominalwidthshallbeusedforLCminwhen
the measured value of LC min exceeds 85%.
7.3 The minimum lengths of samples for testing purposes
shallbeasprescribedbythepurchaserorasprescribedinTable
NOTE 2—If the seal generates a pressure of 3 psi at 90% of nominal
width, LC min equals 85%. However, if the seal generates 3 psi at 70% 2.
D3542−08 (2013)
TABLE 2 Minimum Lengths of Seal Samples
shall have a ⁄4-in. (6–mm) diameter pressure foot with a force
Seal Size, in. (mm) Length of Sample, in. (m) of 0.18 6 0.02 lbf (0.80 6 0.09 N). Measurements with the
Less than 2 (51) 96 (2.44) platform-mountedgaugeshouldbetakenwiththepressurefoot
2 (51) to less than 3 (76) 72 (1.83)
centered on the longitudinal edge of the seal. Calculate the
3 (76) and larger 60 (1.52)
recovery as follows:
Recovery, % 5 recovered width 3100 / nominalwidth (1)
~ ! ~ !
8. Specimen Preparation
Report the least value of recovery to the nearest 1%.
8.1 All test
...
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