1、Designation: D6946/D6946M 131Standard 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,
2、 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.1NOTEUnits information was editorially corrected in August 2013.1. Scope1.1 This specificati
3、on covers mineral-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.
4、1.3 The 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
5、the standard.1.4 This 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.
6、 Referenced Documents2.1 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 asP
7、rotective Coatings (Withdrawn 2012)3D5727 Specification for Emulsified Refined Coal Tar (Min-eral Colloid Type)3.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-s
8、ion meeting Specification 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 neces
9、sary to ensure that the appropriaterefined 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 temperaturere
10、fined coal tar conforming to the 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 eith
11、era natural or manufactured aggregate 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.)NOTE 1It is recommended that the nominal maximum size of theaggregate not exceed 0.6
12、mm No. 30 sieve when tested in accordancewith 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
13、. Originallyapproved in 2003. Last previous 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. Fo
14、r 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 19428-2959. U
15、nited States16. Performance Requirements6.1 CompositionThe 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 a
16、mount of aggregate specified in Table 1 is contained inthe 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 shal
17、l 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 prescribed in Table 1 for Type
18、I or Type II.7. Sampling7.1 Sample in accordance with Practice D140 and TestMethods D2939.8. Inspection8.1 Inspection of material shall be made as agreed uponbetween the purchaser and the supplier.9. Packaging and Package Marking9.1 Emulsion shall be packaged to permit acceptance bycarrier for trans
19、portation and to afford adequate protectionfrom normal hazards of handling and shipping.9.2 Each package shall be plainly marked with the name andbrand of the manufacturer/supplier, ASTM designation as wellas the type or grade of the product, production code or lotnumber.10. Keywords10.1 bituminous
20、pavement sealer; emulsified coal tar; min-eral colloidASTM 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 r
21、ights, and the riskof infringement of such 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 f
22、or revision of this standard or for additional 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 heari
23、ng you shouldmake 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 m
24、ay 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/).TABLE 1 Physic
25、al Requirements for Emulsified Refined Coal tar(Mineral Colloid Type)Laboratory Test MethodAType ICharacteristicsType IICharacteristicsmin max min maxUniformity Pass PassWet film continuity Pass PassDensity at 25C 77F, 1.1 9.0 - 1.24 10.3 1.44 12.0gm/ml lb/galResidue by evaporation, % 37 - 40 -Water
26、 content, % - 63 - 60Resistance to volatilization, - 15 - 12residue weight loss, %Solubility of residue in CS2,%25 - 20 -Ash content of residue, % 30 40 39 58Aggregate content test, % 0 0 9.7 50.0Drying time, firm, set, h - 8 - 8Resistance to kerosene Pass PassResistance to water Pass PassFlexibilit
27、y No flaking, cracking through to the substrate, orloss of adhesion to the substrateASee Test Methods D2939NOTE 1The customary mix designs in the sealing industry are basedon the volume of concentrated Specification D5727 coal tar sealer. Thisspecification does not follow the customary mix design because theproduct is a ready to use material purchased in a prepackaged pailprimarily for the retail homeowner use without modification.D6946/D6946M 1312
