1、Designation: D 4866 88 (Reapproved 2003)e1Standard Performance Specification forCoal Tar Pitch Emulsion Pavement Sealer Mix FormulationsContaining Mineral Aggregates and Optional PolymericAdmixtures1This standard is issued under the fixed designation D 4866; the number immediately following the desi
2、gnation indicates the year oforiginal adoption 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.e1NOTEThe Referenced Documents section wa
3、s editorially changed in July 2003.1. 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 bit
4、uminous pavements of airports, parking areas, anddriveways.1.2 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 responsibilit
5、y 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:D 466 Test Methods for Films Deposited from BituminousEmulsions2D 2939 Test Methods for Emulsified Bitum
6、ens Used asProtective Coatings3D 3699 Specification for Kerosine4D 5727 Specification for Emulsified Refined Coal Tar (Min-eral Colloid Type)33. Materials3.1 Ratios of component materials that make up the mixtureto be tested, as well as detailed specifications for the mineralaggregate and optional p
7、olymeric admixture shall be as agreedupon between the purchaser and the seller.3.2 The base coal-tar emulsion shall meet the requirementsof Specification D 5727.3.3 The mineral aggregate shall be either a natural ormanufactured product composed of clean, hard, durable, un-coated particles, free from
8、 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
9、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
10、prepared or primedsurfaces at a rate of 0.4 to 1.0 L/m2(1.0 to 2.5 gal/100 ft2)without 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
11、rain, snow, 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 eachstep no coagulation or separation of the ingredients occurs and that themix has a good application consi
12、stency. When possible, a small batchshould be mixed and observed prior to the onset of major work.4.2 The mixture shall conform to the physical propertiesprescribed in Table 1.5. Sampling5.1 Sample in accordance with Test Methods D 2939.1This specification is under the jurisdiction of ASTM Committee
13、 D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.09on Bituminous Emulsions.Current edition approved July 10, 2003. Published August 2003. Originallyapproved in 1988. Last previous edition approved in 1988 as D 4866 88.2Discontinued; See 1997 Annual Book of ASTM S
14、tandards, Vol 04.04.3Annual Book of ASTM Standards, Vol 04.04.4Annual Book of ASTM Standards, Vol 05.03.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Test Methods6.1 RedispersibilityThe product (coal-tar emulsion/aggregate/water
15、/optional admixture) shall be of a uniformconsistency without settlement or segregation in storage to theextent that it can be readily dispersed and applied to thepavement.6.2 Drying TimeTest Methods D 2939, section on FirmSet except test after drying for 8 h.6.3 Resistance to HeatTest Method D 2939
16、, section onHeat Test at 80 6 3C (176 6 5F) for 2 h.6.4 Resistance to KerosineTest Methods D 466 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
17、relative topreviously acceptable standards and are not meant to duplicate actualspecified field application rates and performance.6.4.1 Apply mixture in two coats using a brass mask 1.6 mm(464 in.) in thickness for the first coat and 3.2 mm (864 in.) forthe second coat. Leave the mask in place for t
18、he 96-h dryingtime. After removing the first mask, position the second maskcarefully 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
19、6 10 % relative humidity.6.4.3 After curing, affix metal ring to surface of coating.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 D 3699
20、. Expose the coating tokerosine for 24 h before evaluating. Remove the kerosine fromthe 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 ke
21、rosine. No evidence ofleakage of the kerosine, loss of adhesion, or discoloration 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
22、 of exposure to water, check for reemulsification.Remove the water, break the tile, 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 sta
23、ndards and are not meant to duplicate actualspecified field application rates and 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
24、1-in. (25.4-mm) mandrel, in approxi-mately 2 s, with the metal next to the mandrel when the bendis made. 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 d
25、o not extend to the metal.7. Inspection7.1 Inspection of component materials shall be 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
26、 grounds for rejection. Incase of rejection, the supplier shall have the right to reinspectthe rejected shipment and resubmit the lot after removal ofthose packages not conforming to the specified requirements.APPENDIX(Nonmandatory Information)X1. INTRODUCTIONX1.1 Coal-tar emulsions have historicall
27、y been used assealants for asphalt pavements to protect them against water,petroleum derivatives, and weather. Since the mid-1960s theuse of mineral aggregates with sealer has become more andmore popular as a method of repairing minor surface imper-fections while at the same time increasing durabili
28、ty and skidresistance. The performance of aggregate/pavement sealermixtures has also been enhanced with the use of polymericadmixtures.X1.2 Sealants prepared in this manner, however, have notbeen trouble free. Failures have occurred due to deficiencies inone or more of the following characteristics:
29、 fuel resistance,adhesion to substrate, weatherability, and flexibility of theapplied film.TABLE 1 Physical Properties of Mixtures of Emulsified Coal-TarPitch, Mineral Aggregates, and Optional Polymeric AdmixturesProperty CharacteristicDrying time, firm set: 8 h, maxResistance to heat: No blistering
30、, 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 metal may be ignore
31、dD 4866 88 (2003)e12X1.3 This specification has been developed to minimizefailures 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 Specif
32、ication D 5727.ASTM International takes no position respecting the validity 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 s
33、uch rights, are entirely their own responsibility.This standard is subject 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 add
34、itional standardsand should be addressed to ASTM International Headquarters. 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 t
35、he ASTM Committee on Standards, at the address shown below.This standard is 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).D 4866 88 (2003)e13
