1、Designation:D6946/D6946M131Standard Specification forEmulsified Refined Coal-Tar(Driveway Sealer,Ready to Use,Primarily Residential Grade)1This standard is issued under the fixed designation D6946/D6946M;the number immediately following the designation indicates theyear of original adoption or,in th
2、e 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 editorially corrected in August 2013.1.Scope1.1 This specification covers mi
3、neral-colloid-stabilized,emulsified refined coal tar suitable for use as a weather-protective and petroleum(aliphatic)solvent resistant coatingover bituminous concrete pavements.1.2 Both products specified are prepackaged ready to usedriveway sealers primarily for retail homeowner use.1.3 The values
4、 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 standard.1.4 T
5、his standard 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 limitations prior to use.2.Referenced Documents2
6、.1 ASTM 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 Coatings(Wit
7、hdrawn 2012)3D5727 Specification for Emulsified Refined Coal Tar(Min-eral Colloid Type)3.Terminology3.1 For both types of mixtures,the ingredients are combinedduring the manufacturing process and shipped ready-to-use.3.1.1 Type I materiala mixture of refined coal tar emul-sion meeting Specification
8、D5727,water,and optional addi-tive.3.1.2 Type II materiala mixture of refined coal tar emul-sion meeting Specification D5727,water,aggregate,and op-tional additive.4.Classification4.1 This specification is designed to give specifying authori-ties the information necessary to ensure that the appropri
9、aterefined coal tar emulsion mixtures are specified for protectingbituminous concrete pavements where fuel resistance is re-quired.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
10、requirements of SpecificationD490 for RT11 or higher.Base refined coal tar emulsion shallbe in accordance with all requirements of Specification D5727.5.2 AggregateAggregate is used in Type II materials toimprove traction and wearability.The aggregate shall be eithera natural or manufactured aggrega
11、te composed of clean,hard,durable particles free of clay and other objectionable materialwhen testing in accordance with Test Method C142.(Boilerslag has been used successfully.)NOTE1It is recommended that the nominal maximum size of theaggregate not exceed 0.6 mm No.30 sieve when tested in accordan
12、cewith Test Method C136.1This 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 August 1,2013.Published August 2013.Originallyapproved in 2003.Last previous
13、 edition approved in 2003 as D6946-03,which waswithdrawn in July 2012 and reinstated August 2013.DOI:10.1520/D6946_D6946M-13E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,re
14、fer 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 19428-2959.United States1 6.Performance Requirements6.1 CompositionThe
15、 refined coal tar emulsion seal coatshall consist of a mixture of ingredients listed in Section 5 foreither specific Type I or II and shall meet all the requirementsof Table 1.6.2 Aggregate Verification TestIn order to verify that theproper amount of aggregate specified in Table 1 is contained inthe
16、 mixture,conduct an aggregate content test according toTest Methods D2939.6.3 The material,after stirring to homogeneity,shall besuitable for application brush,squeegee,roller,or suitablespray equipment without heating.The mixture shall be ofsuitable consistency for application by the selected method insingle coats of approximately(depending on pavement texture)2.9 to 4.9 m2/L 60 to 100 ft2/gal without appreciable drainageon inclines up to 0.8%.The mixture shall conform to thephysical properties
