ASTM_D_2993_-_98.pdf

Designation:D 2993 98Standard Specification forAcrylonitrile-Butadiene Rubberized Tar1This standard is issued under the fixed designation D 2993;the number immediately following the designation 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.1.Scope1.1 This specification covers one grade of rubberized tar foruse in construction of rubberized tar concrete pavement.2.Referenced Documents2.1 ASTM Standards:D 20 Test Method for Distillation of Road Tars2D 70 Test Method for Density of Semi-Solid BituminousMaterials(Pyrometer Method)2D 95 Test Method for Water in Petroleum Products andBituminous Materials by Distillation3D 139 Test Method for Float Test for Bituminous Materials2D 140 Practice for Sampling Bituminous Materials2D 872 Test Method for Sulfonation Index of Road Tars2D 2042 Test Method for Solubility of Asphalt Materials inTrichloroethylene2D 2398 Test Method for Softening Point of Bitumen inEthylene Glycol(Ring-and-Ball)4D 2994 Test Methods for Rubberized Tar23.Significance and Use3.1 This specification gives the requirements for rubberizedtar suitable for constructing bituminous concrete pavement.4.Requirements4.1 The rubberized tar shall consist of unvulcanized acry-lonitrile butadiene rubber(NBR),solid or latex,containingnecessary additives preblended with high-temperature,residualcoke oven tar conforming to the requirements prescribed inTable 1.The rubberized tar shall conform to the requirementsprescribed in Table 2.4.2 The blending operation of the tar with the rubber andsubsequent storage of the rubberized tar blend shall be carriedout in equipment free from contamination by asphaltic,petro-leum,or other noncoke oven tar materials.The rubberized tarshall be held in storage(which may be in either the manufac-turing equipment or approved storage tanks)for a minimum of20 h or until testing is completed.5.Sampling5.1 Take samples of rubberized tar in accordance withMethods D 10.6.Test Methods6.1 Determine the properties of the rubberized tar given inTable 2 in accordance with Test Method D 2994.1This specification is under the jurisdiction of ASTM Committee D-4 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.43 onSpecifications and Tests for Tar and Tar Products.Current edition approved January 10,1998.Published February 1999.Originallypublished as D 2993 71.Last previous edition D 2993 83(1991).2Annual Book of ASTM Standards,Vol 04.03.3Annual Book of ASTM Standards,Vol 05.01.4Discontinued;see 1984 Annual Book of ASTM Standards,Vol 04.04.TABLE 1 Physical Requirements for TarPropertyRequirementASTMMethodSamplingD 140Float test,at 50C,s150 to 200D 139Specific gravity,25/25Cnot less than 1.20D 70Total bitumen soluble in CS2,weight%not less than 75D 2042Water,volume%:Distillation,weight%:not more than 0.05D 95D 20Total to 170C0 to 1Total to 235C0 to 2Total to 270C0 to 7Total to 300C0 to 12Total to 355Cnot more than 26Specific gravity of distillate at 38/38C:D 70To 300Cnot less than 1.035300 to 355Cnot less than 1.085Softening point of residue fromdistillation,C:D 2398To 300C42 to 52To 355Cnot more than 95Sulfonation index:D 872Total distillate to 300Cnot more than 1.0Distillate 300 to 355Cnot more than 1.0TABLE 2 Physical Requirements for Rubberized Tar CementPropertyRequirementsPenetration,mm/10;25C:Fuel immersed100 to 250Nonimmersed100 to 225Difference between samplesnot more than 50Volume and weight change,percentVolumenot more than 2.5Weightnot more than 2.0Flow,mm,38Cnot more than 40Softening point,Cnot less than 34Viscosity,cP90C4 800 to 18 500105C2 050 to7 600120C860 to3 050Moisture content,%not more than 0.05Homogeneityno lumps retained onsieve1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTM7.Keywords7.1 rubberized tar;acrylonitrile-butadiene ruber;coke-oventarThe American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of 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 for revision of this standard or for additional standardsand should be addressed to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,1