1、Designation: D4866/D4866M 88 (Reapproved 2017)Standard 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 followin
2、g 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.1. Scope1.1 This performance spe
3、cification 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 bituminous pavements of airports, parking areas, anddriveways.1.2 The
4、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 from the two systems may result in non-conformancewith the stan
5、dard.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 responsibility of the userof this standard to establish appropriate
6、 safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Internationa
7、l Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D466 Test Methods for Films Deposited From BituminousEmulsions (Withdrawn 1998)3D2939 Test Methods for Emulsified Bitumens Used asProt
8、ective Coatings (Withdrawn 2012)3D3699 Specification for KerosineD5727/D5727M Specification for Emulsified Refined CoalTar (Mineral Colloid Type)3.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 optiona
9、l 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/D5727M.3.3 The mineral aggregate shall be either a natural ormanufactured product composed of clean, hard, durable, un-coated particles,
10、free from 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 mineralaggreg
11、ate modified 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 pr
12、operly prepared 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
13、 rain, snow, and so forth, until the emulsion has dried.NOTE 2When these materials are applied in commercial quantities the1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.09on Bituminous Emulsions.Cu
14、rrent edition approved May 1, 2017. Published May 2017. Originallyapproved in 1988. Last previous edition approved in 2011 as D4866/D4866M 88(2011)1. DOI: 10.1520/D4866_D4866M-88R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.o
15、rg. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary 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 19428-2
16、959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical
17、 Barriers to Trade (TBT) Committee.1purchaser or inspector should observe the mixing to ensure that after eachstep 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
18、 major work.4.2 The 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 settlem
19、ent or segregation 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 Ker
20、osineTest Methods 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
21、actualspecified field 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 maskcar
22、efully around the 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 coat
23、ing.Because of the 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 f
24、romthe ring and blot 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
25、 ofthe tile shall 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 til
26、e, and immediately 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
27、 performance.6.6 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
28、when the bendis made. Immediately after bending, while the panel is still overthe mandrel, examine the coating by normal vision forcracking, flaking, and loss of adhesion. Ignore small, hairlinesurface cracks that do not extend to the metal.7. Inspection7.1 Inspection of component materials shall be
29、 made asagreed 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 rei
30、nspectthe rejected 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, ma
31、xResistance to 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 no
32、textend to the metal may be ignoredD4866/D4866M 88 (2017)2APPENDIX(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 agg
33、regates with sealer 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 pre
34、pared in this 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 minimizefailure
35、s of this type. 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/D5727M.ASTM International takes no position respecting the validity
36、 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 such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject
37、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 invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters
38、. 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 fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is
39、 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 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 88 (2017)3
