1、Designation: D5893/D5893M 16Standard Specification forCold Applied, Single Component, Chemically CuringSilicone Joint Sealant for Portland Cement ConcretePavements1This standard is issued under the fixed designation D5893/D5893M; the number immediately following the designation indicates theyear of
2、original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers cold applied, singlecomponent, ch
3、emically curing silicone sealants that are basedon polymers of polysiloxane structures and are intended for usein sealing joints and cracks in portland cement concretehighway and airfield pavements. The specification includesboth non-sag and self-leveling types of sealants.1.1.1 This specification d
4、oes not 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 either SI units or inch-pound uni
5、tsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 The following safety hazards caveat perta
6、ins 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 of the userof this standard to establish appropriate safety and healthpractices and determine the appli
7、cability of regulatory limita-tions prior to use. Specific precautionary statements are givenin Appendix X1.2. Referenced Documents2.1 ASTM Standards:2C639 Test Method for Rheological (Flow) Properties ofElastomeric SealantsC661 Test Method for Indentation Hardness of Elastomeric-Type Sealants by Me
8、ans of a DurometerC679 Test Method for Tack-Free Time of Elastomeric Seal-antsC792 Test Method for Effects of HeatAging onWeight Loss,Cracking, and Chalking of Elastomeric SealantsC793 Test Method for Effects of Laboratory AcceleratedWeathering on Elastomeric Joint SealantsC1183 Test Method for Extr
9、usion Rate of Elastomeric Seal-antsD618 Practice for Conditioning Plastics for TestingD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1985 Practice for Preparing Concrete Blocks for TestingSealants, for Joints and CracksD2202 Test Method for Slump of SealantsD5249 Specif
10、ication for Backer Material for Use with Cold-and Hot-Applied Joint Sealants in Portland-Cement Con-crete and Asphalt JointsD5329 Test Methods for Sealants and Fillers, Hot-Applied,for Joints and Cracks in Asphalt Pavements and PortlandCement Concrete PavementsD5535 Terminology Relating to Formed-in
11、-Place Sealantsfor Joints and Cracks in Pavements (Withdrawn 2009)33. Terminology3.1 DefinitionsRefer to Terminology D5535 for defini-tions of the following terms used in this specification: backermaterial, chemically curing sealant, joint, and sealant.4. Classification4.1 Sealants meeting the requi
12、rements of this specificationshall be classified according to type as one of the following: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 desiredapplication configuration.1Thi
13、s 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 July 1, 2016. Published July 2016. Originally approvedin 1996. La
14、st previous edition approved in 2010 as D5893/D5893M 10. DOI:10.1520/D5893_D5893M-16.2For 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
15、page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.2 Type SL (Self-Leveling)A single component sealantthat is self-leveling a
16、nd 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 with a consis-tency that is appropriate for application to joints in portlandcement concrete pav
17、ements 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 throughout repeatedcycles of thermal expansion and contraction and against theinfiltration of mois
18、ture 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 atleast six months after the original purchase.5.3 After specified curing in the laboratory, the color
19、 of thecured sealant shall be as agreed upon by the purchaser and themanufacturer.5.4 The sealant is intended for use in appropriatelyprepared, clean, dry, and frost-free portland cement concretejoints or cracks in new pavements or pavements that are beingresealed.6. Physical Requirements6.1 Cure Ev
20、aluationThe 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 presence of any uncuredmaterial, as indicated by sealant that has not changed from aliquid to a solid s
21、tate.6.2 Rheological Properties:6.2.1 When tested in accordance with Test Method D2202,Type NS sealant shall not slump more than 7.6 mm 0.30 in.6.2.2 When tested in accordance with Test Method C639 forType I sealant, Type SL sealant shall exhibit a smooth, levelsurface with no indication of bubbling
22、.6.3 Extrusion RateWhen tested in accordance with TestMethod C1183 for Type S sealants, the extrusion rate shall notbe less than 20 mL/min 1.22 in.3/min.6.4 Tack-Free TimeThe sealant shall be tack-free, with notransfer of the sealant to the polyethylene, when tested at 5 h 610 min in accordance with
23、 Test Method C679.6.5 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 C792.6.6 BondThe sealant shall be tested in accordance with9.6 at 29 6 1C 20 6 2F for five complete cycles of100 % ext
24、ension 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 betweenthe sealant and the concrete test blocks.6.6.2 Water-ImmersedNo specimen shall develop anycrack, separation, or o
25、ther 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 thesealant and the concrete test blocks.6.7 Hardness:6.7.1 When tested in accordance with Test Method C661at296 1C
26、20 6 2F, using a Type A-2 durometer, thehardness shall not exceed 25.6.7.2 When tested at standard laboratory conditions and inaccordance with Test Method C661 at 23 6 2C 73.4 63.6F, using a Type 00 durometer, the hardness shall not beless than 30.6.8 FlowWhen tested in accordance with 9.8 at 93.3 6
27、1C 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 at standard labo-ratory conditions and in accordance with Test Methods D412using Die C, at 23 6 2C 73.4 6 3.6F, and using a 500 620 mm/min 20 6 2 in./min elongation rate, the u
28、ltimateelongation of the sealant shall not be less than 600 %.6.9.2 Tensile Stress at 150 % ElongationWhen tested atstandard laboratory conditions and in accordance with TestMethods D412 using Die C, at 23 6 2C 73.4 6 3.6F, andusing a 500 6 20 mm/min 20 6 2 in./min elongation rate, thetensile stress
29、 at 150 % elongation shall not exceed 310 kPa 45psi.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 either intact orbroken
30、, 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 after weathering to bending at -26 6-2C -15 63.6F as described in Test Method C793. Evidence of physicalchange in the
31、 surface of the material by visual and tactileexamination shall constitute failure of this test. The Acceler-ated Weathering test shall be repeated every 5 years or when aformula change is made.6.11 ResilienceWhen tested in accordance with 9.11, theresilience of the sealant shall not be less than 75
32、 %.7. Sampling7.1 Samples may be 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
33、 afforded allreasonable facilities 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 L1 gal of the sealant. If the sealant is supplied in cartridges, asufficient number
34、of cartridges shall be obtained at random toD5893/D5893M 162provide 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 thesealan
35、t. The required amount of sealant shall be removed fromthe container quickly and placed in a container that willminimize 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 sampleconta
36、iner shall be completely filled 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 themateri
37、al remaining in the container to 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.
38、 The materialtested shall not contain 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
39、examination of the test sample, 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 cure
40、d material shall beremoved prior to preparing additional specimens.8. Standard Conditions8.1 Standard Conditions for Laboratory TestsThe labora-tory atmospheric conditions, to be referred to as standardconditions, shall be 23 6 2C 73.4 6 3.6F and 50 6 10 %relative humidity as described in Practice D
41、618. Condition thesealant sample to be tested for at least 24 h at standardconditions prior to opening and beginning any tests.NOTE 1The positive and negative variations specified along with thetemperature and relative humidity settings are the maximum allowedoperational fluctuations from the set po
42、ints under equilibrium conditions.They do not imply that the set points can be higher or lower than thosespecified.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
43、is cured throughout to a solid form in theallotted 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
44、cure time, provided that thesealant has cured 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 co
45、ncrete-sealant bonding surface with aknife 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 exam
46、ine the 12.7 by 12.7-mm 0.5 by0.5-in. 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 pre
47、sence of any uncured sealant shall 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 D2202.9.2.2 Type S
48、L SealantTest Method C639, Type I sealant.9.3 Extrusion RateTest Method C1183, Type S sealant.9.4 Tack Free TimeTest Method C679.9.5 Effects of Heat AgingTest Method C792.9.6 Bond:9.6.1 ScopeThis is a test method for evaluating bondperformance.9.6.2 Significance and UseThis test method provides away
49、 to determine bond and movement capability.9.6.3 Concrete Block PreparationPrepare concrete testblocks in accordance with Practice D1985. 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 Methods D5329 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.
