1、Designation: D6690 07 D6690 12Standard Specification forJoint and Crack Sealants, Hot Applied, for Concrete andAsphalt Pavements1This standard is issued under the fixed designation D6690; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, 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.1. Scope1.1 This specification covers joint and crack sealants of the hot applied type intended for use in sealin
3、g joints and cracks inPortland Cement Concrete and Asphaltic Concrete Pavements.1.2 This specification does not purport to cover the properties required of sealants for use in areas of Portland Cement concreteor asphaltic pavement subject to jet fuel or other fuel spillage such as vehicle and/or air
4、craft refuel and maintenance areas.1.3 The values stated in SI units are the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices a
5、nd determine the applicability of regulatoryrequirements prior to use.2. Referenced Documents2.1 ASTM Standards:2D36 Test Method for Softening Point of Bitumen (Ring-and-Ball Apparatus)D5167 Practice for Melting of Hot-Applied Joint and Crack Sealant and Filler for EvaluationD5249 Specification for
6、Backer Material for Use with Cold- and Hot-Applied Joint Sealants in Portland-Cement Concrete andAsphalt JointsD5329 Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphaltic and Portland Cement ConcretePavements2.2 Federal Specification:3SS-S-1410C3. General Requirement
7、s3.1 The sealant shall be composed of a mixture of materials that will form a resilient and adhesive compound capable ofeffectively sealing joints and cracks in concrete and asphaltic pavements against the infiltration of moisture and foreign materialthroughout repeated cycles of expansion and contr
8、action with temperature changes, and that will not, at ambient temperatures, flowfrom the joint or be picked up by vehicle tires. The material shall be capable of being brought to a uniform pouring consistencysuitable for completely filling the joints without inclusion of large air holes or disconti
9、nuities and without damage to the material.It shall remain relatively unchanged in application characteristics for at least 6 h at the recommended application temperature inthe field.4. Classification4.1 Type IA joint and crack sealant capable of maintaining an effective seal in moderate climates. T
10、he material is tested forlow temperature performance at 18C using 50 % extension.4.2 Type IIA joint and crack sealant capable of maintaining an effective seal in most climates. Material is tested for lowtemperature performance at 29C using 50 % extension.4.3 Type IIIA joint and crack sealant capable
11、 of maintaining an effective seal in most climates. Material is tested for lowtemperature performance at 29C using 50 % extension. Special tests are included (formerly Federal Spec SS-S-1401C).4.4 Type IVA joint and crack sealant capable of maintaining an effective seal in climates experiencing very
12、 cold temperatures.Material is tested for low temperature performance at 29C using 200 % extension.NOTE 1It is the responsibility of the user agency to determine which type is most applicable to their conditions.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
13、19428-2959. United States15. Physical Requirements5.1 Maximum Heating TemperatureThe maximum heating temperature is the highest temperature to which a sealant can beheated, and still conform to all the requirements specified herein. For purposes of testing as specified hereinafter, the applicationte
14、mperature shall be the same as the maximum heating temperature. The maximum heating temperature shall be set forth by themanufacturer, shall be shown on all containers and shall be provided to the testing agency before any laboratory tests are begun.5.2 The sealant shall conform to the requirements
15、prescribed in Table 1.6. Sampling and Heating6.1 Sampling:6.1.1 Samples may be taken at the plant or warehouse prior to delivery or at the time of delivery, at the option of the purchaser.If sampling is done prior to shipment, the inspector representing the purchaser shall have free access to the ma
16、terial to be sampled.The inspector shall be afforded all reasonable facilities for inspection and sampling which shall be conducted so as not to interfereunnecessarily with the operation of the works.6.1.2 Samples shall consist of one of the manufacturers original sealed containers selected at rando
17、m from the lot or batch offinished material. A batch or lot shall be considered as all finished material that was manufactured simultaneously or continuouslyas a unit between the time of compounding and the time of packaging or placing in shipping containers.6.1.3 Obtain the sealant portion for test
18、ing from the selected manufacturers original sealed container in accordance withPractice D5167. The sample portion added to and heated in the melter shall weigh 800 6 50 g for Types I, II, IV, and 1600 6 50g for Type III. Both pots of the melter described in Practice D5167 shall be used for Type III
19、.6.2 HeatingHeat the material in accordance with Practice D5167.6.2.1 The oil bath in the melter shall be heated to a temperature between the sealants maximum heating temperature and 42Cabove the sealants maximum heating temperature. (Never allow the oil temperature to exceed 288C). Add the sealant
20、to themelter according to the instructions in Practice D5167. After the sample has been added to the melter, regulate the oil temperaturewithin the listed temperature limits while raising the sealants temperature to manufacturers recommended maximum heatingtemperature within the required 1 hour of t
21、ime, as stated in Practice D5167. Immediately upon reaching the maximum heatingtemperature, pour samples for testing, except for Type III which for Types I, II and IV pour all specimens for testing directlyincluding penetration, resilience, bond, softening point and compatibility. Type III shall be
22、heated for 3 h from the time of firstaddition to the melter. melter before pouring all specimens.7. Test Methods:7.1 Specimen ConditioningCondition all the penetration, resilience, bond to concrete, softening point and compatibilityspecimens at standard laboratory conditions for 24 6 4 h as specifie
23、d in test Method D5329 prior to beginning any testing.1 This specification is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.33 on FormedIn-Place Sealants for Joints and Cracks in Pavements.Current edition approved Dec.
24、1, 2007July 15, 2012. Published January 2008. Originally approved in 2001. Last previous edition approved in 20062007 asD6690 06a.D6690 07. DOI: 10.1520/D6690-07.10.1520/D6690-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.or
25、g. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.TABLE 1Type I
26、Type II Type III Type IVCone Penetrationat 25C90 max. 90 max. 90 max. 90-150Softening Point C (F) 80 (176) minimum 80 (176) minimum 80 (176) minimum 80 (176) minimumBond, non-immersed Two out of three 25.4 mmspecimens passA 5 cyclesat 50 % ext. at -18CThree 12.7 mm SpecimenspassA 3 cycles at 50 %ext
27、. at -29CThree 12.7 mm SpecimenspassA 3 cycles at 50 %ext. at -29CThree 12.7 mm SpecimenspassA 3 cycles at 200 %ext. at -29CBond, water immersed - - Three 12.7 mm specimenspassA 3 cycles at 50 %ext. at -29C-Resilience, % - 60 min. 60 min. 60 min.Oven Aged Resilience,% - - 60 min. -Asphalt Compatibil
28、ity PassB PassB PassB PassBA The development at any time during the test procedure of a crack, separation, or other opening that at any point is over 6 mm deep, in the sealant or between the sealantand concrete block shall constitute failure of the test specimen. The depth of the crack, separation o
29、r other opening shall be measured perpendicular to the side of thesealant showing the defect.B There shall be no failure in adhesion, formation of an oily exudate at the interface between the sealant and asphaltic concrete or other deleterious effects on the asphalticconcrete or sealant when tested
30、at 60C.D6690 1227.2 Cone PenetrationDetermine cone penetration according to Method D5329 for Cone Penetration, non-immersed.7.3 Softening PointDetermine the Softening Point according to Test Method D36. USP Glycerin shall be used for the liquid.7.4 Bond, Non-ImmersedDetermine the bond according to T
31、est Method D5329 for Bond, non-immersed.7.4.1 After final scrubbing and blotting specified in Test Method D5329, air dry the blocks on their 12.7 mm 25.4 mm endsat standard laboratory conditions for 1 h 6 10 min. prior to pouring bond specimens.7.4.2 Immediately after conditioning the blocks as in 7
32、.4.1, assemble the blocks with spacers as specified in Test Method D5329so the opening between the blocks will form a cured sealant block that is 25.4 mm 6 0.1 mm wide for Type I and 12.7 6 0.1 mmwide for Type II , Type III, and Type IV.7.4.3 After pouring material into the block opening, condition
33、the specimen as in 7.1. After conditioning, remove spacers andtrim off excess material with a hot knife being careful not to pull sealant from the block. Condition the test specimens not less than4 h at the temperature specified in Table 1 for the Specific Type of Sealant. Immediately extend the spe
34、cimen to the prescribedpercentage in Table 1 using the apparatus and rate described in D5329.7.4.4 Re-compress and re-extend according to Test Method D5329 for the total number of cycles prescribed in Table 1. Therequired cycles shall be completed within a 5-day period from the time of pouring for T
35、ype II, III, and IV, and a 7-day period forType I.7.5 Bond, Water Immersed, Type III OnlyDetermine the Bond according to ASTM D5329. Prepare the specimens as in section7.4 except after conditioning, immerse in water for 96 h as described in D5329. Testing shall be completed in 5 days from removalfro
36、m the water for Types III.7.6 ResilienceUse Test Method D5329 for Resilience.7.7 Oven Aged ResilienceAge specimen 70C for 168 h. Use Test Method D5329.7.8 Asphalt CompatibilityTest asphalt compatibility according to Test Method D5329.8. Packaging and Marking8.1 The sealing compound shall be delivere
37、d in the manufacturers original containers. Each container shall be legibly markedwith the name of the manufacturer, the trade name of the sealant, the manufacturers batch, or lot number and specification numberand type, the minimum application temperature and the maximum heating temperature. The ma
38、ximum heating temperature mustbe at least 11C (20F) higher than the minimum application temperature.9. Keywords9.1 hot applied; joint sealantAPPENDIX(Nonmandatory Information)X1.X1.1 Some if not all, materials conforming to this specification may be damaged by heating to too high a temperature, rehe
39、ating,or by heating for too long a time. Care should be exercised to secure equipment for heating and application that is suitable for thepurpose and approved by the manufacturer of the material. The material should be heated in a kettle or melter constructed as adouble boiler, with the space betwee
40、n the inner and outer shells filled with oil or other heat transfer medium. Thermostatic controlfor the heat transfer medium shall be provided and shall have sufficient sensitivity to maintain sealant temperature within themanufacturers specified application temperature range. Temperature indicating
41、 devices shall have intervals no greater than 5F(2.8C) and shall be calibrated as required to assure accuracy. The melter shall have a continuous sealant agitation and mixingsystem to provide uniform viscosity and temperature of material being applied. If equipped with an application system to deliv
42、ersealant to the pavement, the melter shall incorporate a recirculation pump or other means of maintaining sealant temperature inthe delivery system. Sealant that has been damaged due to overheating, reheating or prolonged heating may experience pooradhesion, softening or bleeding, difficult applica
43、tion, or jelling in the melter. Direct heating must not be used. As a means ofascertaining whether or not the material covered by this specification is being or has been damaged in the field as a result ofoverheating, reheating, or prolonged heating, flow panel specimens may be prepared periodically
44、 by drawing off sealant directlyfrom the melter-applicator during sealing operations and then tested for flow according to the methods of testing materials coveredby this specification. Flow in excess of 3.0 mm for Type II, III, and IV, and 5.0 mm for Type I would indicate damage to materialcaused b
45、y improper heating procedures.D6690 123X1.2 Pavement joints in new construction for application of material covered by this specification should be dry, clean of all scale,dirt, dust, curing compound, and other foreign matter. The sidewalls of the joint space to be sealed should then be thoroughlysa
46、ndblasted, blown clean of loose sand by high-pressure air, and sealed by use of the melter-applicator described in X1.1.X1.3 When material covered by this specification is used for maintenance or resealing of joints that have contained either similaror dissimilar sealing material, it is recommended
47、that the joint be dry, cleaned thoroughly with a plow, router, wire brush, concretesaw, or other suitable tool or tools designed for the purpose of neatly cleaning pavement joints. Loose material should be blownout. The sidewalls of the joint space to be sealed should be thoroughly sandblasted, blow
48、n free of loose sand with high-pressureair and then sealed with material by use of the melter-applicator described in X1.1.X1.4 The use of a backer material or bond breaker in the bottom of the joint to be filled with material covered by this specificationis recommended to control the depth of the s
49、ealant and achieve the desired shape factor, and to support the sealant againstindentation and sag. Backup materials and bond breakers should be compatible with the material. Due to the elevated temperaturesof application of material covered by this specification, care should be exercised in the selection of the suitable backer materials.Refer to Specification D5249 for recommended backer materials.X1.5 Care should be practiced in the application of material covered by this specification to avoid overfilling of the jo
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