1、Designation: D 6945 03Standard Specification forEmulsified Refined Coal-Tar (Ready to Use, CommercialGrade)1This standard is issued under the fixed designation D 6945; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers mineral-colloid-stabilized,emulsified refined coal tar suitable for use as a weather-protectiv
3、e 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 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresp
4、onsibility 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 ASTM Standards:C 136 Test Method for Sieve Analysis of Fine and CoarseAggregates2C 142 Test Method for Cla
5、y Lumps and Friable Particles inAggregates2D 140 Practice for Sampling Bituminous Materials3D 490 Specification for Road Tar3D 2939 Test Methods for Emulsified Bitumens Used asProtective Coatings4D 3423 Practice for Application of Emulsified Coal TarPitch (Mineral Colloid Type)4D 5727 Specification
6、for Emulsified Refined Coal Tar (Min-eral Colloid Type)43. Terminology3.1 The refined coal tar emulsion mixed at the contractorsyard or at the job site shall meet the requirements of Specifi-cation D 5727. Mixture Types I and II (see Appendix A ofPractice D 3423 for standard definition of terms) are
7、 describedbelow:3.1.1 Type I materiala mixture of refined coal tar emul-sion meeting Specification D 5727, water, and aggregate.3.1.2 Type II materiala mixture of refined coal tar emul-sion meeting Specification D 5727, water, aggregate, andadditive.4. Classification4.1 This specification is designe
8、d 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 required.4.2 Normal aggregate loadings for Type I materials shouldrange from 0.360 to
9、0.600 kg/L (3 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 that high aggregate loadingsresult in a lack of fuel resistance as determined by the
10、 Resistance toKerosene test according to Test Methods D 2939. Poor adhesion may alsooccur with high sand loadings.5. Materials and Manufacture5.1 Base Refined Coal Tar EmulsionThis emulsion shallbe made using binders prepared from a high temperaturerefined coal tar conforming to the requirements of
11、SpecificationD 490 for RT11 or higher. The use of oil and water gas tar isnot allowed. The base refined coal tar emulsion shall be inaccordance with all requirements of Specification D 5727.5.2 AggregateThe aggregate shall be either a natural ormanufactured (boiler slag has been used successfully) a
12、ngularaggregate composed of clean, hard, durable particles free ofclay and other objectionable material when tested in accor-dance with Test Method C 142. (Boiler slag has been usedsuccessfully.)NOTE 2It is recommended that this aggregate meet the gradationgiven in Table 1, when tested in accordance
13、 with Test Method C 136.5.3 AdditiveIn the case of Type II material, the additiveshall be approved by the base refined coal 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,
14、and aggregate and be proportioned within the ranges as1This specification is under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.09on Bituminous Emulsions.Current edition approved July 10, 2003. Published August 2003.2Annual B
15、ook of ASTM Standards, Vol 04.02.3Annual Book of ASTM Standards, Vol 04.03.4Annual Book of ASTM Standards, Vol 04.04.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.shown in Table 2. The composition shall have written approvalof the
16、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 t
17、he 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 sele
18、cted 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
19、of mix-ture being applied at the job site shall be taken for mix designverification in accordance with Test Methods D 2939. 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
20、 aggregate contentverification in accordance with Test Methods D 2939.6.4 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 brus
21、h, 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
22、 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 D 140 and TestMethods D 2939.9. Inspection9.1 Inspection of materia
23、l shall 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
24、 marked with the nameand brand of the manufacturer/ supplier, ASTM designation aswell as the type or grade of the product, production code, or lotnumber. If the shipment is by bulk tanker load, the beforementioned information shall be so noted on the bill of lading.11. Keywords11.1 bituminous paveme
25、nt sealer; emulsified coal tar; min-eral colloidTABLE 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 85-100 98-1000.425 mm (No. 40) 5-25 25-85 85-1000.300 mm (No. 50) 2-10 5-25 25-850.212 mm
26、(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 for the aggregate usedin the mix design.TABLE 2 Type IComposition of Mixture per
27、100 gal of RefinedCoal Tar EmulsionApplicationRefined CoalTar Emulsion,L (gal)Water,L (gal)Aggregate,mg (lb)First and Second Seal Coat 100 (100) 25-30 (25-30) 36-60 (300-500)TABLE 3 Type IIComposition of Mixture per 100 gal of RefinedCoal Tar EmulsionApplicationRefined CoalTar Emulsion,L (gal)Water,
28、L (gal)Additive,L (gal)Aggregate,mg (lb)First and SecondSeal Coat100 (100) 25-70 (25-70) 2-6 (2-6) 36-72 (300-600)TABLE 4 Physical Requirements for Emusified Refined Coal TarMixture Tested According to Test Methods D 2939PropertyAType ICharacteristicsType IICharacteristicsmin max min maxUniformity P
29、ass 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 through to the substrate, orloss of adhesion to the sub
30、strateASee Test Methods D 2939.D6945032ASTM 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
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33、ke your views known to the 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).D6945033
