1、Designation: D4866/D4866M 88 (Reapproved 2011)1Standard Performance Specification forCoal Tar Pitch Emulsion Pavement Sealer Mix FormulationsContaining Mineral Aggregates and Optional PolymericAdmixtures1This standard is issued under the fixed designation D4866/D4866M; the number immediately followi
2、ng the designation indicates theyear of 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.1NOTEUnits information was edit
3、orially revised in June 2011.1. Scope1.1 This performance specification covers mixtures of emul-sified coal-tar pitch (mineral colloid type), mineral aggregates,and optional polymeric admixtures that are used as a weather-protective and straight aliphatic hydrocarbon resistant coatingsover bituminou
4、s pavements of airports, parking areas, anddriveways.1.2 The values stated in either SI units or inch-pound unitsare 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 fr
5、om the two systems may result in non-conformancewith the standard.1.3 The following safety hazards statement applies only tothe test method portion, Section 6, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the respon
6、sibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D466 Test Methods for Films Deposited From BituminousEmulsions3D2939 Test Methods for Emulsified
7、 Bitumens Used asProtective CoatingsD3699 Specification for KerosineD5727 Specification for Emulsified Refined Coal Tar (Min-eral Colloid Type)3. Materials3.1 Ratios of component materials that make up the mixtureto be tested, as well as detailed specifications for the mineralaggregate and optional
8、polymeric admixture shall be as agreedupon between the purchaser and the seller.3.2 The base coal-tar emulsion shall meet the requirementsof Specification D5727.3.3 The mineral aggregate shall be either a natural ormanufactured product composed of clean, hard, durable, un-coated particles, free from
9、 dirt, organic matter, and otherobjectionable substances.3.4 The optional polymeric admixture shall be any polymeror mixtures thereof, with added compounding ingredients ofsuch nature and quality that will allow the admixture to becompatible with and enhance the performance of mineralaggregate modif
10、ied coal-tar emulsion pavement sealers.3.5 The water used in mixing shall be potable and free fromharmful soluble salts. The temperature of the water shall be atleast 10C 50F.4. Physical Requirements4.1 The mixture as applied shall be of uniform consistencyand suitable for application to properly pr
11、epared or primedsurfaces at a rate of 0.4 to 1.0 L/m21.0 to 2.5 gal/100 ft2without appreciable drainage on inclines up to 0.8 % 0.1in./ft.NOTE 1Pavement and ambient temperature should be not less than7C 45F at the time of application and for at least 12 h thereafter, withno precipitation of rain, sn
12、ow, and so forth, until the emulsion has dried.NOTE 2When these materials are applied in commercial quantities thepurchaser or inspector should observe the mixing to ensure that after each1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direc
13、t responsibility of Subcommittee D08.09on Bituminous Emulsions.Current edition approved May 1, 2011. Published June 2011. Originallyapproved in 1988. Last previous edition approved in 2003 as D4866 88 (2003)1.DOI: 10.1520/D4866_D4866M-88R11E01.2For referenced ASTM standards, visit the ASTM website,
14、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 this historical standard is referencedon www.astm.org.1Copyright ASTM Intern
15、ational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.step no coagulation or separation of the ingredients occurs and that themix has a good application consistency. When possible, a small batchshould be mixed and observed prior to the onset of major work.4.2 T
16、he mixture shall conform to the physical propertiesprescribed in Table 1.5. Sampling5.1 Sample in accordance with Test Methods D2939.6. Test Methods6.1 RedispersibilityThe product (coal-tar emulsion/aggregate/water/optional admixture) shall be of a uniformconsistency without settlement or segregatio
17、n in storage to theextent that it can be readily dispersed and applied to thepavement.6.2 Drying TimeTest Methods D2939, section on Firm Setexcept test after drying for 8 h.6.3 Resistance to HeatTest Method D2939, section onHeat Test at 80 6 3C 176 6 5F for 2 h.6.4 Resistance to KerosineTest Methods
18、 D466 exceptapply the mixture in two coats and use kerosine in testingapplied film.NOTE 3The film thickness and procedures specified are useful onlyfor determining the performance of the coating under testing relative topreviously acceptable standards and are not meant to duplicate actualspecified f
19、ield application rates and performance.6.4.1 Apply mixture in two coats using a brass mask 1.6 mm464 in. in thickness for the first coat and 3.2 mm 864 in. forthe second coat. Leave the mask in place for the 96-h dryingtime. After removing the first mask, position the second maskcarefully around the
20、 first coat before pouring the second.Doctor the second coat even with the top of the mask using aspatula or other straight edge.6.4.2 Cure each coat for 96 h in agitated air at 25 6 1C 776 2F and at 50 6 10 % relative humidity.6.4.3 After curing, affix metal ring to surface of coating.Because of th
21、e textured surface of the coating, the ring must besealed to the dry second coat with a silicone rubber sealant.6.4.4 Fill the metal ring with kerosine. The kerosine shallcomply with Specification D3699. Expose the coating tokerosine for 24 h before evaluating. Remove the kerosine fromthe ring and b
22、lot dry and immediately examine the film forsoftness and loss of adhesion. Immediately after this filmexamination, break the tile in half exposing that part of the tilewhose film was subjected to the kerosine. No evidence ofleakage of the kerosine, loss of adhesion, or discoloration ofthe tile shall
23、 be visible.6.5 Resistance to WaterPrepare a cured film panel asdescribed in 6.4.1 and 6.4.2. Test the cured film as described in6.4.3 and 6.4.4 but using distilled water in place of kerosine.After 24 h of exposure to water, check for reemulsification.Remove the water, break the tile, and immediatel
24、y check forblistering and loss of adhesion.NOTE 4The film thickness and procedures specified are useful onlyfor determining the performance of the coating under test relative topreviously acceptable standards and are not meant to duplicate actualspecified field application rates and performance.6.6
25、FlexibilityUse the same test panel that was used forthe heat test (6.3). After the removal from the oven, conditionthe test panel in air at 25 6 2C for 1 h and then bend it throughan arc of 180, over a 1-in. 25.4-mm mandrel, in approxi-mately 2 s, with the metal next to the mandrel when the bendis m
26、ade. Immediately after bending, while the panel is still overthe mandrel, examine the coating by normal vision for crack-ing, flaking, and loss of adhesion. Ignore small, hairline surfacecracks that do not extend to the metal.7. Inspection7.1 Inspection of component materials shall be made asagreed
27、upon between the purchaser and the seller as part of thepurchase contract.8. Rejection and Resubmittal8.1 Failure to conform to any of the requirements prescribedin this specification shall constitute grounds for rejection. Incase of rejection, the supplier shall have the right to reinspectthe rejec
28、ted shipment and resubmit the lot after removal ofthose packages not conforming to the specified requirements.TABLE 1 Physical Properties of Mixtures of Emulsified Coal-TarPitch, Mineral Aggregates, and Optional Polymeric AdmixturesProperty CharacteristicDrying time, firm set: 8 h, maxResistance to
29、heat: No blistering, sagging, or slippingResistance to kerosene: No penetration or loss of adhesionResistance to water: No blistering, loss of adhesion, or tendency toreemulsifyFlexibility: No flaking, cracking, or loss of adhesion to themetal; small hairline surface cracks that do notextend to the
30、metal may be ignoredD4866/D4866M 88 (2011)12APPENDIX(Nonmandatory Information)X1. INTRODUCTIONX1.1 Coal-tar emulsions have historically been used assealants for asphalt pavements to protect them against water,petroleum derivatives, and weather. Since the mid-1960s theuse of mineral aggregates with s
31、ealer has become more andmore popular as a method of repairing minor surface imper-fections while at the same time increasing durability and skidresistance. The performance of aggregate/pavement sealermixtures has also been enhanced with the use of polymericadmixtures.X1.2 Sealants prepared in this
32、manner, however, have notbeen trouble free. Failures have occurred due to deficiencies inone or more of the following characteristics: fuel resistance,adhesion to substrate, weatherability, and flexibility of theapplied film.X1.3 This specification has been developed to minimizefailures of this type
33、. It specifies that coatings modified withmineral aggregates, with or without polymeric admixtures,meet the minimum performance requirements of coal-tar pitchemulsion pavement sealer as specified in Specification D5727.ASTM International takes no position respecting the validity of any patent rights
34、 asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any ti
35、me by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will
36、receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM
37、International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this 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/).D4866/D4866M 88 (2011)13
