1、Designation: D 5893 04Standard Specification forCold Applied, Single Component, Chemically CuringSilicone Joint Sealant for Portland Cement ConcretePavements1This standard is issued under the fixed designation D 5893; the number immediately following the designation indicates the year oforiginal ado
2、ption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers cold applied, single compo-nent, chemically
3、curing silicone sealants that are based onpolymers of polysiloxane structures and are intended for use insealing joints and cracks in portland cement concrete highwayand airfield pavements. The specification includes both non-sag and self-leveling types of sealants.1.1.1 This specification does not
4、purport to cover theproperties required of sealants for use in areas of portlandcement concrete pavements subject to jet fuel or other fuelspillage, such as vehicle or aircraft refueling and maintenanceareas, or a combination thereof.1.2 The values stated in SI units are to be regarded as thestandar
5、d. The values given in parentheses are for informationonly.1.3 The following safety hazards caveat pertains only to thetest methods portion, Section 9, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility
6、 of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use. Specific precautionary statements are givenin Appendix X1.2. Referenced Documents2.1 ASTM Standards:2C 639 Test Method for Rheological (Flow) Prop
7、erties ofElastomeric SealantsC 661 Test Method for Indentation Hardness ofElastomeric-Type Sealants by Means of a DurometerC 679 Test Method for Tack-Free Time of ElastomericSealantsC 792 Test Method for Effects of Heat Aging on WeightLoss, Cracking, and Chalking of Elastomeric SealantsC 793 Test Me
8、thod for Effects of Accelerated Weatheringon Elastomeric Joint SealantsC 1183 Test Method for Extrusion Rate of ElastomericSealantsC 1442 Practice for Conducting Tests on Sealants UsingArtificial Weathering ApparatusD 412 Test Methods for Vulcanized Rubber and Thermo-plastic ElastomersTensionD 1985
9、Practice for Preparing Concrete Blocks for TestingSealants, for Joints and CracksD 2202 Test Method for Slump of SealantsD 5249 Specification for Backer Material for Use withCold- and Hot-Applied Joint Sealants in Portland-CementConcrete and Asphalt JointsD 5329 Test Methods for Sealants and Fillers
10、, Hot-Applied,for Joints and Cracks in Asphaltic and Portland CementConcrete PavementsD 5535 Terminology Relating to Formed-in-Place Sealantsfor Joints and Cracks in PavementsG 151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices that Use Laboratory Light SourcesG 153 Practic
11、e for Operating Enclosed Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG 154 Practice for Operating Fluorescent Light Apparatusfor UV Exposure of Nonmetallic MaterialsG 155 Practice for Operating Xenon Arc Light Apparatusfor Exposure of Non-Metallic Materials3. Terminology3.1 Defini
12、tionsRefer to Terminology D 5535 for defini-tions of the following terms used in this specification: backermaterial, chemically curing sealant, joint, and sealant.4. Classification4.1 Sealants meeting the requirements of this specificationshall be classified according to type as one of the following
13、:1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.33 onFormed-In-Place Sealants for Joints and Cracks in Pavements.Current edition approved Feb. 1, 2004. Published February 2004. Originallyapproved in
14、 1996. Last previous edition approved in 1996 as D 5893 96.2For 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.1C
15、opyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.1 Type NS (Non-Sag)A single component sealant thatresists sagging after application in horizontal joints and re-quires tooling or forming into the joint to achieve the desiredapplicat
16、ion configuration.4.1.2 Type SL (Self-Leveling)A single component sealantthat is self-leveling and has sufficient flow characteristics toform a smooth and level surface in horizontal joints withouttooling or forming after application.5. General Requirements5.1 The sealant shall be a uniform mixture
17、with a consis-tency that is appropriate for application to joints in portlandcement concrete pavements through pressure feed applicationunits or by hand caulking guns. The sealant shall cure by meansof a chemical reaction of the components to form an elasto-meric seal that seals joints in concrete t
18、hroughout repeatedcycles of thermal expansion and contraction and against theinfiltration of moisture and incompressibles.5.2 When stored in the original, unopened containers atconditions recommended by the manufacturer, the sealant shallbe capable of meeting the specification requirements for atlea
19、st six months after the original purchase.5.3 After specified curing in the laboratory, the color of thecured sealant shall be as agreed upon by the purchaser and themanufacturer.5.4 The sealant is intended for use in appropriately pre-pared, clean, dry, and frost-free portland cement concrete joint
20、sor cracks in new pavements or pavements that are beingresealed.6. Physical Requirements6.1 Cure EvaluationThe sealant shall cure throughout a12.7 by 12.7 mm (0.5 by 0.5 in.) cross section within 21 dayswhen evaluated in accordance with 9.1. At 21 days 6 4hofcuring, the sealant shall not show the pr
21、esence of any uncuredmaterial, as indicated by sealant that has not changed from aliquid to a solid state.6.2 Rheological Properties:6.2.1 When tested in accordance with Test Method D 2202,Type NS sealant shall not slump more than 7.6 mm (0.30 in.).6.2.2 When tested in accordance with Test Method C
22、639for Type I sealant, Type SL sealant shall exhibit a smooth, levelsurface with no indication of bubbling.6.3 Extrusion RateWhen tested in accordance with TestMethod C 1183 for Type S sealants, the extrusion rate shall notbe less than 50 mL/min (3.05 in.3/min).6.4 Tack-Free TimeThe sealant shall be
23、 tack-free, with notransfer of the sealant to the polyethylene, when tested at 5 h 610 min in accordance with Test Method C 679.6.5 Effects of Heat AgingThe sealant shall not lose morethan 10 % of its original weight or show any cracking orchalking when tested in accordance with Test Method C 792.6.
24、6 BondThe sealant shall be tested in accordance with9.6 at 29 6 1C (20 6 2F) for five complete cycles of100 % extension each. All three specimens shall meet thefollowing requirements for bond:6.6.1 Non-ImmersedNo specimen shall develop anycrack, separation, or other opening in the sealant or between
25、the sealant and the concrete test blocks.6.6.2 Water-ImmersedNo specimen shall develop anycrack, separation, or other opening in the sealant or betweenthe sealant and the concrete test blocks.6.6.3 Oven-AgedNo specimen shall develop any crack,separation, or other opening in the sealant or between th
26、esealant and the concrete test blocks.6.7 Hardness:6.7.1 When tested in accordance with Test Method C 661at296 1C (20 6 2F), using a Type A-2 durometer, thehardness shall not exceed 25.6.7.2 When tested in accordance with Test Method C 661 at23 6 2C (73.4 6 3.6F), using a Type 00 durometer, thehardn
27、ess shall not be less than 30.6.8 FlowWhen tested in accordance with 9.8 at 93.3 61C (200 6 2F) for 72 h 6 30 min, there shall be no flow.6.9 Rubber Properties in Tension:6.9.1 Ultimate ElongationWhen tested in accordancewith Test Methods D 412 using Die C, at 23 6 2C (73.4 63.6F), and using a 500 6
28、 20 mm/min (20 6 2 in./min)elongation rate, the ultimate elongation of the sealant shall notbe less than 600 %.6.9.2 Tensile Stress at 150 % ElongationWhen tested inaccordance with Test Methods D 412 using Die C, at 23 6 2C(73.4 6 3.6F), and using a 500 6 20 mm/min (20 6 2 in./min)elongation rate, t
29、he tensile stress at 150 % elongation shall notexceed 310 kPa (45 psi).6.10 Effects of Accelerated WeatheringAfter 5000 h ofexposure in accordance with 9.10, the sealant shall not flow,show tackiness, the presence of an oil-like film, or reversion toa mastic-like substance, form surface blisters eit
30、her intact orbroken, form internal voids, or have surface crazing, chalking,cracking, hardening, or loss of rubber-like properties. Thesealant shall not experience any cracking or crazing whensubjected to the Test Method C 793 bend test. Evidence ofphysical change in the surface of the material by v
31、isual andtactile examination shall constitute failure of this test. TheAccelerated Weathering test shall be repeated every 5 years orwhen a formula change is made.6.11 ResilienceWhen tested in accordance with 9.11, theresilience of the sealant shall not be less than 75 %.7. Sampling7.1 Samples may b
32、e taken at the plant or warehouse prior todelivery or at the time of delivery, at the option of thepurchaser. If sampling is conducted prior to shipment, theinspector representing the purchaser shall have free access tothe material to be sampled. The inspector shall be afforded allreasonable facilit
33、ies for inspection and sampling that shall beconducted so as not to interfere unnecessarily with the opera-tion of the works.7.2 Samples for testing shall consist of not less than 3.78 L(1 gal) of the sealant. If the sealant is supplied in cartridges, asufficient number of cartridges shall be obtain
34、ed at random toprovide at least 3.78 L (1 gal). If the sealant is supplied in18.9-L (5-gal) or 207.9-L (55-gal) containers, the sample shallbe obtained from an unopened container. The container shall beopened and any surface covering removed to expose thesealant. The required amount of sealant shall
35、 be removed fromthe container quickly and placed in a container that willD5893042minimize exposure of the sealant to air. The sample containershall be compatible with the sealant. Use of a liner inside thecontainer may assist in minimizing air exposure. The samplecontainer shall be completely filled
36、 in a manner that excludesair entrapment and then sealed. A metal can with a doublefriction lid lined with a polyethylene bag meets these require-ments. After obtaining the sample from containers, any liningor covering shall be replaced to prevent exposure of thematerial remaining in the container t
37、o air. The container lidsshall be replaced tightly.7.3 When the sample (other than those in cartridges) fortesting is opened to begin laboratory testing, it shall beexamined for the presence of cured material. Any skins ofcured sealant shall be removed from the sample. The materialtested shall not c
38、ontain any cured portions. If sufficientquantities of uncured sealant cannot be obtained from thesample, or if cured portions of sealant are noted within thesample (other than surface skins), the sample shall be discardedand a new sample obtained.7.4 After opening and examination of the test sample,
39、 alltest specimens shall be prepared without delay to minimizecuring of the sample. The sample should be handled in amanner that minimizes air exposure while preparing testspecimens. If any cured material skins form on the samplewhile preparing test specimens, the cured material shall beremoved prio
40、r to preparing additional specimens.8. Standard Conditions8.1 Standard Conditions for Laboratory TestsThe labora-tory atmospheric conditions, hereinafter referred to as standardconditions, shall be 23 6 2C (73.4 6 3.6F) and 50 6 5%relative humidity. Condition the sealant sample to be tested forat le
41、ast 24 h at standard conditions prior to opening andbeginning any tests.9. Test Methods9.1 Cure Evaluation:9.1.1 ScopeThis test method determines that the sealant iscured to a solid form.9.1.2 Significance and UseThis test method determinesthat the sealant is cured throughout to a solid form in thea
42、llotted time so that further testing can be completed.9.1.3 ProcedureMake and cure one bond sample, asspecified in 9.6.4, at laboratory standard conditions for 21 days+ 4 h. To aid with specimen curing, spacers may be removedprior to reaching the specified cure time, provided that thesealant has cur
43、ed sufficiently so that no damage or distortion ofthe sealant occurs. After 21 days of curing, within +4 h, removeall spacers and other non-adherent surfaces from the sealant.Remove the sealant from the concrete block surfaces by slicingcleanly along each concrete-sealant bonding surface with aknife
44、 or blade. This produces a sealant portion that has a 12.7by 12.7-mm (0.5 by 0.5-in.) cross-sectional area and is 50.8mm (2 in.) in length. Immediately slice this sealant portion inhalf to produce two sealant portions that are 25.4-mm (1-in.)long. Immediately examine the 12.7 by 12.7-mm (0.5 by0.5-i
45、n.) surfaces of the sealant that were exposed by slicing andthe bottom of the sealant portion that was in contact with thespacers or a base sheet for the presence of uncured material, asindicated by sealant that has not changed from a liquid to asolid state. The presence of any uncured sealant shall
46、 constitutefailure of this evaluation.9.1.4 Precision and BiasNo information is presentedabout precision or bias of this test method for cure evaluationsince the result is nonquantitative.9.2 Rheological Properties:9.2.1 Type NS SealantTest Method D 2202.9.2.2 Type SL SealantTest Method C 639, Type
47、I sealant.9.3 Extrusion RateTest Method C 1183, Type S sealant.9.4 Tack Free TimeTest Method C 679.9.5 Effects of Heat AgingTest Method C 792.9.6 Bond:9.6.1 ScopeThis is a test method for evaluating bondperformance.9.6.2 Significance and UseThis test method provides away to determine bond and moveme
48、nt capability.9.6.3 Concrete Block PreparationPrepare concrete testblocks in accordance with Practice D 1985. If desired, blocksmay be cut in half to produce blocks that are 25.4 by 25.4 by76.2 mm (1 by 1 by 3 in.).9.6.3.1 Prepare, store, and clean the blocks in accordancewith the procedure of Test
49、Methods D 5329 for bond, non-immersed. After the specified scrubbing and blotting, place theblocks on their 25.4 by 50.8-mm (1 by 2-in.) or 25.4 by25.4-mm (1 by 1-in.) ends, and allow them to dry for 16 to 24h at standard laboratory conditions.9.6.4 Specimen PreparationPrepare three test specimensfor each bond evaluation. Assemble each test specimen usingtwo prepared concrete test blocks. Assemble the blocks withtheir 50.8 by 76.2-mm (2 by 3-in.) or 25.4 by 76.2-mm (1 by3-in.) surfaces facing, using appropriate spacers to form acavity i
