ASTM D3542-92(1998)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation: D 3542 – 92 (Reapproved 1998)
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D3183 Practice for Rubber—Preparation of Pieces forTest
Purposes from Products
1.1 This specification covers the material requirements for
preformed polychloroprene elastomeric joint seals for bridges.
3. Marking and Ordering Information
The seal consists of a multiple-web design composed of
3.1 Each lot of seal shall be marked with characters of not
polychloroprene and functions only by compression of the seal
less than 0.25 in. (6.35 mm) in height on the top of the seal at
between the faces of the joint with the seal folding inward at
a maximum of 4 ft (1.22 m) intervals showing the lot number,
the top to facilitate compression. The seal is installed with a
date of manufacture, and the manufacturing seal designation.
lubricant adhesive and is designed to seal the joint and reject
Thesealshallalsohavediemarkingswhichareregisteredwith
incompressibles.
the Rubber Manufacturers Association (RMA).
NOTE 1—This specification may not be applicable for seals whose
3.2 The purchaser shall specify the anticipated required
height is less than 90% of its nominal width.
minimum acceptable joint movement, and either the minimum
1.2 This standard does not purport to address all of the
joint opening, or the nominal width of seal.
safety problems, if any, associated with its use. It is the
4. Materials and Manufacture
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 4.1 The seals shall be preformed, and the material shall be
bility of regulatory limitations prior to use.
vulcanized elastomeric compound using virgin polychloro-
1.3 The values stated in inch-pound units are to be regarded prene as the only polymer.
as the standard. The values given in parentheses are provided
5. Physical Requirements
for information only.
5.1 The materials shall conform to the physical properties
2. Referenced Documents
prescribed in Table 1.
2.1 ASTM Standards:
5.2 In the applicable requirements of Table 1 and the test
D412 Test Methods for Vulcanized Rubber and Thermo- methods, all deflection shall be based on the nominal width.
plastic Rubbers and Thermoplastic Elastomers-Tension
6. Dimensions and Working Parameters
D471 Test Method for Rubber Property—Effect of Liq-
uids 6.1 The size, shape and dimensional tolerances shall be as
D 518 Test Method for Rubber Deterioration—Surface outlined in 6.1.1.
Cracking 6.1.1 Measurements used for laboratory testing shall be
D573 Test Method for Rubber—Deterioration in an Air taken to the nearest 0.01 in. (0.3 mm) and reported/recorded to
Oven the nearest 0.1 in. (3 mm) as the average of three measure-
D575 TestMethodsforRubberPropertiesinCompression ments.Themeasuredwidthshallbegreaterthanorequaltothe
D1149 Test Method for Rubber Deterioration—Surface nominal width. The seal height shall not be less than 90% of
Ozone Cracking in a Chamber the nominal width unless joint recess dimensions or special
D 2240 Test Method for Rubber Property—Durometer design considerations dictate the geometry.
Hardness 6.2 Compression Deflection Properties—The contact pres-
sure expressed in pounds-force per square inch (or pascals)
when the seal is compressed to any particular width indicates
This specification is under the jurisdiction of ASTM Committee D-4 on Road
the stress-strain relationship that exists in the seal. This
and Paving Materials and is the direct responsibility of Subcommittee D04.34 on
Preformed Joint Fillers and Sealers.
Current edition approved Nov. 15, 1992. Published January 1993. Originally
published as D3542–76. Last previous edition D3542–83.
Annual Book of ASTM Standards, Vol 09.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D 3542
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.
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
7. Sampling
acceptable, providing the compressed width at LC max is less
thantheminimumanticipatedjointopening,andthemovement 7.1 Alot shall consist of the quantity for each cross section
agreed upon between the purchaser and the supplier.
range requirement is met.
6.2.2 The minimum limit of compressibility (LC min) is 7.2 Samplesshallbetakenatrandomfromeachshipmentof
material.Iftheshipmentconsistsofmorethanonelot,eachlot
definedasthecompressedwidth(expressedintermsofpercent
of nominal width) corresponding to a contact pressure of 3 psi shall be sampled.
7.3 The minimum lengths of samples for testing purposes
(20.68 kPa). The LC min shall be determined in accordance
with 9.3. For the purpose of calculating movement range, a shallbeasprescribedbythepurchaserorasprescribedinTable
2.
valueat85%ofnominalwidthshallbeusedforLCminwhen
the measured value of LC min exceeds 85%.
8. Specimen Preparation
NOTE 2—If the seal generates a pressure of 3 psi at 90% of nominal
8.1 All test specimens shall be cut, buffed, or both from the
width, LC min equals 85%. However, if the seal generates 3 psi at 70%
sampleofpreformedseal.Careshouldbetakennottooverheat
of nominal width, the LC min equals 70%.
6.2.3 The maximum limit of compressibility (LC max) is
TABLE 2 Minimum Lengths of Seal Samples
definedasthecompressedwidth(expressedintermsofpercent
Seal Size, in. (mm) Length of Sample, in. (m)
ofnominalwidth)correspondingtoacontactpressureof35psi
Less than 2 (51) 96 (2.44)
(241.32 kPa). The LC max shall be determined in accordance
2 (51) to less than 3 (76) 72 (1.83)
with 9.3. LC max has been designated at 35 psi (241.32 kPa)
3 (76) and larger 60 (1.52)
inordertomitigatethetendenciestowardpressuredecayofthe
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D 3542
the test specimen during buffing. The cut shall be square to temperature of−206 2°F (29 6 1.1°C) for 22 h. (Note 3).
within 2° and smooth, with no roughness visible to the naked Unclamp the assembly and remove the upper compression
eye.The use of a tooth blade device or a guillotine-type cutter, plate, or carefully remove the
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