1、Designation: D6945/D6945M 03 (Reapproved 2011)1Standard Specification forEmulsified Refined Coal-Tar (Ready to Use, CommercialGrade)1This standard is issued under the fixed designation D6945/D6945M; the number immediately following the designation indicates theyear of original adoption or, in the ca
2、se 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 editorially revised in June 2011.1. Scope1.1 This specification covers mine
3、ral-colloid-stabilized,emulsified refined coal tar suitable for use as a weather-protective and petroleum (aliphatic) solvent resistant coating.This product is typically applied to commercial lots and otherlow speed bituminous concrete pavements suitable for protec-tion.1.2 The values stated in eith
4、er 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 standard.1.3 This standar
5、d does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 AST
6、M Standards:2C136 Test Method for Sieve Analysis of Fine and CoarseAggregatesC142 Test Method for Clay Lumps and Friable Particles inAggregatesD140 Practice for Sampling Bituminous MaterialsD490 Specification for Road TarD2939 Test Methods for Emulsified Bitumens Used asProtective CoatingsD3423 Prac
7、tice for Application of Emulsified Coal-TarPitch(Mineral Colloid Type)D5727 Specification for Emulsified Refined Coal Tar (Min-eral Colloid Type)3. Terminology3.1 The refined coal tar emulsion mixed at the contractorsyard or at the job site shall meet the requirements of Specifi-cation D5727. Mixtur
8、e Types I and II (see Appendix A ofPractice D3423 for standard definition of terms) are describedbelow:3.1.1 Type I materiala mixture of refined coal tar emul-sion meeting Specification D5727, water, and aggregate.3.1.2 Type II materiala mixture of refined coal tar emul-sion meeting Specification D5
9、727, water, aggregate, and addi-tive.4. Classification4.1 This specification is designed to give specifying authori-ties the information necessary to ensure that the appropriatebase refined coal tar emulsion mixtures are specified forprotecting bituminous concrete pavements where fuel resis-tance is
10、 required.4.2 Normal aggregate loadings for Type I materials shouldrange from 0.360 to 0.600 kg/L3 to 5 lb/gal. Type II materialscan have slightly higher loadings of aggregate; however,aggregate loadings in excess of 0.720 kg/L 6 lb/gal arestrongly discouraged.NOTE 1Several researchers have shown th
11、at high aggregate loadingsresult in a lack of fuel resistance as determined by the Resistance toKerosene test according to Test Methods D2939. Poor adhesion may alsooccur with high sand loadings.5. Materials and Manufacture5.1 Base Refined Coal Tar EmulsionThis emulsion shallbe made using binders pr
12、epared from a high temperaturerefined coal tar conforming to the requirements of SpecificationD490 for RT11 or higher. The use of oil and water gas tar is not1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommitt
13、ee D08.09on Bituminous Emulsions.Current edition approved May 1, 2011. Published June 2011. Originallyapproved in 2003. Last previous edition approved in 2003 as D6945 03. DOI:10.1520/D6945_D6945M-03R11E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer
14、Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.allowed. The base refined coal tar emuls
15、ion shall be inaccordance with all requirements of Specification D5727.5.2 AggregateThe aggregate shall be either a natural ormanufactured (boiler slag has been used successfully) angularaggregate composed of clean, hard, durable particles free ofclay and other objectionable material when tested in
16、accor-dance with Test Method C142. (Boiler slag has been usedsuccessfully.)NOTE 2It is recommended that this aggregate meet the gradationgiven in Table 1, when tested in accordance with Test Method C136.5.3 AdditiveIn the case of Type II material, the additiveshall be approved by the base refined co
17、al tar emulsionmanufacturer.6. Performance Requirements6.1 Type I CompositionThe refined coal tar emulsion sealcoat shall consist of a mixture of refined coal tar emulsion,water, and aggregate and be proportioned within the ranges asshown in Table 2. The composition shall have written approvalof the
18、 refined coal tar emulsion manufacturer.6.2 Type II CompositionThe refined coal tar emulsionslurry seal coat shall consist of a mixture of refined coal taremulsion, water, aggregate, and additive and be proportionedwithin the ranges as shown in Table 3. The composition shallhave written approval of
19、the local coal tar emulsion manufac-turer.6.3 Mixture TestingPrior to application, the contractorshall submit samples of component materials for the proposedmix in accordance with the terms of the agreement between thecontractor and owner/related parties. The samples shall beblended according to sel
20、ected proportions as given in theappropriate table, either Table 2 or Table 3, and tested forconformance with Table 4 requirements, for the appropriatetype of mixture. The samples shall be tested by a laboratorydesignated by the owner/related parties.6.3.1 Aggregate Verification TestPeriodic samples
21、 of mix-ture being applied at the job site shall be taken for mix designverification in accordance with Test Methods D2939. In orderto verify that the proper amount of aggregate specified inTables 2 and 3 is contained in the mixture, samples of mixturebeing applied at the job site shall be taken for
22、 aggregate contentverification in accordance with Test Methods D2939.6.4 The manufacturer shall approve the refined coal taremulsion as to the specific composition numbers to be used inthe mix design.7. Other Requirements7.1 Both mixture types shall be of suitable consistency forapplication by brush
23、, squeegee, roller, or suitable spray equip-ment without heating and shall bond to properly prepared dampor primed surfaces.7.2 The mixture, after stirring to homogeneity, shall besuitable for application by the selected method in single coatswithout appreciable drainage on inclines up to 0.8 %.7.3
24、The mixture shall conform to the physical propertiesprescribed in Table 4. When the mixture fails any of the givenrequirements, it shall be reformulated and retested for compli-ance.8. Sampling8.1 Sample in accordance with Practice D140 and TestMethods D2939.9. Inspection9.1 Inspection of material s
25、hall be made as agreed uponbetween the purchaser and the manufacturer.10. Packaging and Package Marking10.1 Emulsion shall be packaged to permit acceptance bycarrier for transportation and to afford adequate protectionfrom normal hazards of handling and shipping.10.2 Each package shall be plainly ma
26、rked with the nameand brand of the manufacturer/ supplier, ASTM designation aswell as the type or grade of the product, production code, or lotTABLE 1 Gradation of AggregatesASieve SizePercent PassingCourse Medium Fine1.18 mm No. 16 100 100 1000.850 mm No. 20 85-100 98-100 1000.600 mm No. 30 25-85 8
27、5-100 98-1000.425 mm No. 40 5-25 25-85 85-1000.300 mm No. 50 2-10 5-25 25-850.212 mm No. 70 - 2-10 5-250.150 mm No. 100 0-2 0-4 2-100.106 mm No. 140 - 0-2 0-2ATable 1 allows three choices of aggregate gradation. In either case, the refinedcoal tar emulsion manufacturer shall give written approval fo
28、r the aggregate usedin the mix design.TABLE 2 Type IComposition of Mixture per 100 gal of RefinedCoal Tar EmulsionApplicationRefined CoalTar Emulsion,L galWater,L galAggregate,mg lbFirst and Second Seal Coat 100 100 25-30 25-30 36-60 300-500TABLE 3 Type IIComposition of Mixture per 100 gal of Refine
29、dCoal Tar EmulsionApplicationRefined CoalTar Emulsion,L galWater,L galAdditive,L galAggregate,mg lbFirst and SecondSeal Coat100 100 25-70 25-70 2-6 2-6 36-72 300-600TABLE 4 Physical Requirements for Emusified Refined Coal TarMixture Tested According to Test Methods D2939PropertyAType ICharacteristic
30、sType IICharacteristicsmin max min maxUniformity Pass PassResidue by evaporation, % 50 40Water Content, 50 60Aggregate Content, % 17 32 16 34Ash Content, percent 60 70 60 73Drying Time, firm set, h 8 8Resistance to kerosene Pass PassResistance to water Pass PassFlexibility No flaking, cracking throu
31、gh to the substrate, orloss of adhesion to the substrateASee Test Methods D2939.D6945/D6945M 03 (2011)12number. If the shipment is by bulk tanker load, the beforementioned information shall be so noted on the bill of lading.11. Keywords11.1 bituminous pavement sealer; emulsified coal tar; min-eral c
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33、s, 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 additional s
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35、ommittee 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D6945/D6945M 03 (2011)13
