1、Designation: D2628 91 (Reapproved 2011)Standard Specification forPreformed Polychloroprene Elastomeric Joint Seals forConcrete Pavements1This standard is issued under the fixed designation D2628; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specifi
3、cation covers the material requirements forpreformed polychloroprene elastomeric joint seals for concretepavements. The seal consists of a multiple web design andfunctions only by compression of the seal between the faces ofthe joint with the seal folding inward at the top to facilitatecompression.
4、The seal is installed with a lubricant and isdesigned to seal the joint and reject incompressibles.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not consid
5、ered standard.1.3 This standard does not purport to address the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.NOTE 1This s
6、pecification is a manufacturing and purchasing specifi-cation only and does not include requirements or considerations forselection of size, or the installation of the joint seals. However, experiencehas shown that successful performance of this product depends upon theproper selection of size and c
7、ross-sectional design of the joint seal, jointsize, and joint spacing for the ambient conditions the pavement will beexposed to, and care in the installation of the joint seals.2. Referenced Documents2.1 ASTM Standards:2D395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcan
8、ized Rubber and Thermo-plastic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD518 Test Method for Rubber DeteriorationSurfaceCracking3D573 Test Method for RubberDeterioration in an AirOvenD575 Test Methods for Rubber Properties in CompressionD1149 Test Methods for Rubber Dete
9、riorationCrackingin an Ozone Controlled EnvironmentD2240 Test Method for Rubber PropertyDurometerHardnessD3183 Practice for RubberPreparation of Pieces for TestPurposes from Products3. Materials and Manufacture3.1 The seals shall be preformed, and the material shall bevulcanized elastomeric compound
10、 using polychloroprene asthe only base polymer.4. Physical Requirements Physical Requirements4.1 The materials shall conform to the physical propertiesprescribed in Table 1.4.2 In the applicable requirements of Table 1 and the testmethods, all deflections shall be based on the nominal width ofthe se
11、al.5. Dimensions and Permissible Variations5.1 The size, shape, and dimensional variations shall be asagreed upon by the purchaser and the producer or supplier.6. Workmanship6.1 Seals shall be free of defects in workmanship andmaterials that may affect its serviceability.7. Sampling7.1 A lot shall c
12、onsist of the quantity for each cross sectionagreed upon by the purchaser and the producer or supplier.7.2 Samples shall be taken at random from each shipment ofmaterial. If the shipment consists of more than one lot, each lotshall be sampled.1This specification is under the jurisdiction of ASTM Com
13、mittee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.34 onPreformed Joint Fillers, Sealers and Sealing Systems.Current edition approved June 1, 2011. Published July 2011. Originally approvedin 1967. Last previous edition approved in 1998 as D2628 91 (2005). DOI
14、:10.1520/D2628-91R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of
15、 this historical standard is referencedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.3 A minimum of 9 linear ft (2.8 m) shall constitute onesample for testing purposes.8. Specimen Preparation8.1 Cut or buff all te
16、st specimens from the sample ofpreformed seal. Except as otherwise specified in the applicablespecifications or test methods, prepare specimens in accor-dance with the requirements of Practice D3183.8.2 Prepare specimens for determining tensile strength andelongation using Die C (Test Methods D412)
17、when possible.Die D may be used when the flat sections of a seal are too smallfor Die C. However, the requirements of Table 1 shall applyregardless of the die used. Carefully perform buffing and keepto a minimum.8.3 Specimens for low temperature and high temperaturerecovery tests and for compression
18、-deflection tests shall consistof 5-in. (127-mm) lengths of the preformed seal. Lightly dustlow-temperature recovery and compression-deflection speci-mens with talc on all internal and external surfaces. Lightlydust specimens for high-temperature recovery with talc on theexternal surfaces only but o
19、therwise test in the as-receivedcondition.8.4 Prepare specimens for ozone resistance in accordancewith Procedure A of Test Method D518 and wipe with toluenebefore testing to remove surface contamination.9. Test Methods9.1 Determine compliance with the requirements of Table 1by conducting tests in ac
20、cordance with the methods specified.9.2 Recovery Tests:9.2.1 Determine the low-temperature and high-temperaturerecovery test values using specimens prepared in accordancewith Section 8. Use two specimens for each test and run the teston both specimens at the same time as a pair.9.2.2 Deflect the spe
21、cimens between parallel plates to 50 %of the nominal width of the seal using the compression devicedescribed in Method B of Test Methods D395. Prior tocompression, place the specimen in a horizontal position suchthat the plane through both edges of the top surface of the jointseal is perpendicular t
22、o the compression plates. As the speci-men is being compressed, the top surface of the joint sealshould fold inward toward the center of the specimen.9.2.3 Place a clamp assembly containing the compressedspecimens in a refrigerated box capable of maintaining atemperature of 146 2F (10 6 1C) for 72 h
23、 (Note 2). Thenunclamp the assembly and remove the upper compressionplate, or carefully remove the specimens from the assemblyand transfer them to a wooden surface in the refrigerated box.Allow the specimens to recover for1hat146 2F (10 61C). Measure the recovered width in the center of the 5-in.(12
24、7-mm) length at the top longitudinal edge of the specimen.Measurements may be made with either a dial caliper or aplatform mounted dial gage graduated in thousandths of aninch (0.02 mm). The platform mounted gage shall have a14-in.(6.35-mm) diameter pressor foot with a force of 0.186 0.02 lbf(0.80 6
25、 0.09 N). Take measurements with the platform-mounted gage with the presser foot centered on the toplongitudinal edge of the seal. Calculate the recovery as follows:Recovery, % 5 recovered width 3 100/nominal width (1)Report the least value of recovery to the nearest wholepercent.NOTE 2The use of a
26、desiccant such as calcium chloride in therefrigerated box should be used to minimize frosting.The desiccant shouldbe changed or reactivated as frequently as necessary to keep it effective.9.2.4 Place a clamp assembly containing the compressedspecimens in a refrigerated box (Note 2) capable of mainta
27、in-ing a temperature of 20 6 2F (29 6 1C) for 22 h. ThenTABLE 1 Physical Requirements for Preformed Elastomeric Joint SealsProperty Requirement ASTM Test MethodTensile strength, min, psi (MPa) 2000 (13.8) D412Elongaton at break, min, % 250 D412Hardness, Type A durometer, points 55 6 5 D2240 (modifie
28、d)AOven aging, 70 h at 212F (100C) D573Tensile strength, loss, max, % 20 maxElongation, loss, max, % 20 maxHardness, Type A durometer, points change 0 to + 10Oil Swell, ASTM Oil 3, 70 h at 212F (100C) D471Weight change, max, % 45 maxOzone resistance D114920 % strain, 300 pphm in air, 70 h (modified)
29、Bat 104F (40C) no cracksLow-temperature stiffening, 7 days at 14F (10C) D2240Hardness, Type A durometer, points change 0 to + 15Low-temperature recovery,C72 h at 14F (10C)50 % deflection, min % 88 9.2DLow-temperature recovery,C22 h at 20F (29C), 50 % deflection,min %83 9.2DHigh-temperature recovery,
30、C70 h at 212F (100C), 50 %deflection, min %85 9.2DCompression-deflection, at 80 % of nominal width, min, lbf/in. (N/m) 3.5 (613) 9.3DAThe term “modified” in the table relates to the specimen preparation. The use of joint seal as the specimen source requires that more plies than specified in either o
31、fthe modified test procedures be used. Such specimen modification shall be agreed upon by the purchaser and seller prior to testing. The hardness test shall be made withthe durometer in a durometer stand as recommended in Test Method D2240.BTest in accordance with Procedure A of Test Method D518.CCr
32、acking, splitting, or sticking of a specimen during a recovery test shall mean that the specimen has failed the test.DThe reference sections are those of this specification.D2628 91 (2011)2unclamp the assembly and remove the upper compression plateor carefully remove the specimens from the assembly
33、andtransfer them to a wooden surface in the refrigerated box.Allow the specimens to recover for1hat206 2F (29 61C). Measure the recovered width and calculate the recoveryas in 9.2.3.9.2.5 Place a clamp assembly containing the compressedspecimens in an oven capable of maintaining a temperature of212
34、6 2F (100 6 1C) for 70 h. Do not preheat the clampassembly. Then unclamp the assembly and carefully removethe specimens from the assembly and transfer them to awooden surface. Allow the specimens to recover for1hat736 4F (23 6 2C). Measure the recovered width and calculatethe recovery as in 9.2.3.9.
35、3 Compression-Deflection Test:9.3.1 Determine the compression-deflection value usingspecimens prepared in accordance with Section 8. Measure thelength of each specimen at the top, center, and bottom using arule graduated in sixteenths of an inch (or millimetres).Average the three measurements and re
36、cord the length of thespecimen to the nearest116 in. (1 mm). Run compression -deflection tests on two specimens.9.3.2 Place the specimen on its side in such a manner that aplane through both edges of the top surface of the seal isperpendicular to the platens of the compression testing ma-chine and e
37、nsuring that the top of the seal folds inward duringdeflection. Test in accordance with Method A of Test MethodsD575 except do not use the sheets of sandpaper.9.3.3 Deflect the specimen to 80 % of nominal width andrecord the force in pounds-force (or newtons) on the compres-sion portion of the third
38、 cycle.9.3.4 Calculate the compression-deflection value at 80 % ofnominal width by dividing the force recorded by the length ofthe specimen. Report the lowest value of compression-deflection to the nearest110 lbf/linear in. (N/m).10. Precision and Bias10.1 Precision and bias statements are under dev
39、elopment.11. Certification and Acceptance11.1 The acceptance of the preformed elastomeric seal shallbe based upon one of the following procedures, as specified bythe purchaser.11.1.1 A certification of conformance to the specificationrequirements. This shall consist of a copy of the producers testre
40、port; or a statement by the supplier accompanied by a copyof the test results, certifying that the material has been sampled,tested, and inspected in accordance with the provisions of thisspecification. Each certification so furnished shall be signed byan authorized agent of the producer or supplier
41、.11.1.2 A certification of test results by an independenttesting agent and a statement that the material has beensampled, tested, and inspected in accordance with the provi-sions of this specification. Each certification so furnished shallbe signed by an authorized agent of the testing agency.11.1.3
42、 Testing by the purchaser of any or all properties inaccordance with the provisions of the specification.12. Product Marking12.1 The seals shall be marked with the lot number, thename or suitable trademark of the producer, or shall beidentifiable as to its manufacture by die markings. The topsurface
43、 of the seal shall be marked at 1-ft intervals in a mannersufficiently clear and durable to enable making length deter-minations of the seal after installation in the pavement joints.12.2 Containers in which the seals are packaged for ship-ment shall be clearly marked with the name of the producer,
44、thesize of the seal, the lot number, and the date of manufacture.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any su
45、ch patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invit
46、ed either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a
47、 fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this
48、 standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D2628 91 (2011)3
