ASTM D3542-92(2007)
(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 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.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information only.
General Information
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Standards Content (Sample)
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Designation: D 3542 – 92 (Reapproved 2007)
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope in an Ozone Controlled Environment
D 2240 Test Method for Rubber Property—Durometer
1.1 This specification covers the material requirements for
Hardness
preformed polychloroprene elastomeric joint seals for bridges.
D3183 Practice for Rubber—Preparation of Product Pieces
The seal consists of a multiple-web design composed of
for Test Purposes from Products
polychloroprene and functions only by compression of the seal
between the faces of the joint with the seal folding inward at
3. Marking and Ordering Information
the top to facilitate compression. The seal is installed with a
3.1 Each lot of seal shall be marked with characters of not
lubricant adhesive and is designed to seal the joint and reject
less than 0.25 in. (6.35 mm) in height on the top of the seal at
incompressibles.
a maximum of 4 ft (1.22 m) intervals showing the lot number,
NOTE 1—This specification may not be applicable for seals whose
date of manufacture, and the manufacturing seal designation.
height is less than 90% of its nominal width.
Thesealshallalsohavediemarkingswhichareregisteredwith
1.2 This standard does not purport to address all of the
the Rubber Manufacturers Association (RMA).
safety concerns, if any, associated with its use. It is the
3.2 The purchaser shall specify the anticipated required
responsibility of the user of this standard to establish appro-
minimum acceptable joint movement, and either the minimum
priate safety and health practices and determine the applica-
joint opening, or the nominal width of seal.
bility of regulatory limitations prior to use.
4. Materials and Manufacture
1.3 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are provided
4.1 The seals shall be preformed, and the material shall be
for information only. vulcanized elastomeric compound using virgin polychloro-
prene as the only polymer.
2. Referenced Documents
5. Physical Requirements
2.1 ASTM Standards:
D412 Test Methods for Vulcanized Rubber and Thermo- 5.1 The materials shall conform to the physical properties
plastic Elastomers—Tension
prescribed in Table 1.
D471 Test Method for Rubber Property—Effect of Liquids 5.2 In the applicable requirements of Table 1 and the test
D 518 Test Method for Rubber Deterioration—Surface
methods, all deflection shall be based on the nominal width.
Cracking
6. Dimensions and Working Parameters
D573 Test Method for Rubber—Deterioration in an Air
Oven 6.1 The size, shape and dimensional tolerances shall be as
D575 Test Methods for Rubber Properties in Compression outlined in 6.1.1.
D1149 Test Methods for Rubber Deterioration—Cracking 6.1.1 Measurements used for laboratory testing shall be
taken to the nearest 0.01 in. (0.3 mm) and reported/recorded to
the nearest 0.1 in. (3 mm) as the average of three measure-
This specification is under the jurisdiction ofASTM Committee D04 on Road
ments.Themeasuredwidthshallbegreaterthanorequaltothe
and Paving Materials and is the direct responsibility of Subcommittee D04.34 on
nominal width. The seal height shall not be less than 90% of
Preformed Joint Fillers, Sealers and Sealing Systems.
the nominal width unless joint recess dimensions or special
Current edition approved Dec. 1, 2007. Published January 2008. Originally
approved in 1976. Last previous edition approved in 2003 as D3542–92 (2003).
design considerations dictate the geometry.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 Compression Deflection Properties—The contact pres-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
sure expressed in pounds-force per square inch (or pascals)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 3542 – 92 (2007)
TABLE 1 Physical Requirements for Preformed Elastomeric Joint Seals
Requirements ASTM Test Method
Tensile strength, min, psi (MPa) 2000 (13.8) D 412
Elongation at break, min, % 250 D 412
A
Hardness, Type A durometer, points 55 6 5 D 2240 (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 D 471
B C
Ozone resistance no cracks D 1149
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 (−14°C), 50 %:
D
Deflection, min, % 88 Section 7
Low-temperature recovery,
22 h at − 20°F (−29°C), 50 %:
D
Deflection, min, % 83 Section 7
High-temperature recovery,
70 h, at 212°F (100°C), 50 %:
D
Deflection, min, % 85 Section 7
Compression-deflection properties:
E
LC min in. (mm) See 8.3.5 D 575 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 D 2240.
B
Sample prepared in accordance with Method A of Test Method D 518.
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 6 0.05 in. (13 6 1.3 mm), min at room temperature of 73 6 4°F (23 6 2.2°C). The sheets of sandpaper are not used.
when the seal is compressed to any particular width indicates with 9.3. LC max has been designated at 35 psi (241.32 kPa)
the stress-strain relationship that exists in the seal. This inordertomitigatethetendenciestowardpressuredecayofthe
relationship is dependent on both the properties of the elas- seal during use. A reading of 35 psi is considered an absolute
tomer and the cross-sectional configuration of the seal. There- maximum pressure which should not be exceeded.
fore, for a predetermined allowable pressure, a definitive
6.2.4 The movement range of the seal is defined as the
relationshipwillexistandtheworkinglimitsofthesealmaybe
numerical difference between the LC min and the LC max
defined.
expressed in inches (mm). For the purpose of calculating the
6.2.1 The working limits (minimum and maximum degrees
movement range, a value at 85% shall be used for LC min
of compression) of the seal shall be determined on the basis of
when the measured value of LC min exceeds 85%. For
the minimum and maximum limits of compressibility (LC min
purposes of acceptance testing, the calculated movement range
and LC max), and the movement range as specified herein.
of the seal shall not be less than the specified value.
Seals with nominal width differing from that specified are
acceptable, providing the compressed width at LC max is less
7. Sampling
thantheminimumanticipatedjointopening,andthemovement
7.1 Alot shall consist of the quantity for each cross section
range requirement is met.
agreed upon between the purchaser and the supplier.
6.2.2 The minimum limit of compressibility (LC min) is
7.2 Samplesshallbetakenatrandomfromeachshipmentof
definedasthecompressedwidth(expressedintermsofpercent
material.Iftheshipmentconsistsofmorethanonelot,eachlot
of nominal width) corresponding to a contact pressure of 3 psi
shall be sampled.
(20.68 kPa). The LC min shall be determined in accordance
7.3 The minimum lengths of samples for testing purposes
with 9.3. For the purpose of calculating movement range, a
shallbeasprescribedbythepurchaserorasprescribedinTable
valueat85%ofnominalwidthshallbeusedforLCminwhen
2.
the measured value of LC min exceeds 85%.
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%
TABLE 2 Minimum Lengths of Seal Samples
of nominal width, the LC min equals 70%.
Seal Size, in. (mm) Length of Sample, in. (m)
6.2.3 The maximum limit of compressibility (LC max) is
Less than 2 (51) 96 (2.44)
definedasthecompressedwidth(expressedintermsofpercent
2 (51) to less than 3 (76) 72 (1.83)
ofnominalwidth)correspondingtoacontactpressureof35psi
3 (76) and larger 60 (1.52)
(241.32 kPa). The LC max shall be determined in accordance
D 3542 – 92 (2007)
refrigeratedboxshouldbeusedtominimizefrosting.Thedesiccantshould
8. Specimen Preparation
be changed or reactivated as frequently as necessary to keep it effective.
8.1 All test specimens shall be cut, buffed, or both from the
sampleofpreformedseal.Careshouldbetakennottooverheat 9.2.4 Place a clamp assembly containing the compressed
the test specimen during buffing. The cut shall be square to
specimen in a refrigerated box capable of maintaining a
within
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