1、Designation:D49092(Reapproved 2016)Standard Specification forRoad Tar1This standard is issued under the fixed designation D490;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 indicate
2、s the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification covers 14 grades of tar as follows:RT-1,RT-2,RT-3,RT-4,RT-5,RT-6,
3、RT-7,RT-8,RT-9,RT-10,RT-11,RT-12,RT.C.B.-5,and RT.C.B.-6.2.Referenced Documents2.1 ASTM Standards:2D4 Test Method for Bitumen ContentD20 Test Method for Distillation of Road TarsD36 Test Method for Softening Point of Bitumen(Ring-and-Ball Apparatus)D70 Test Method for Density of Semi-Solid Bituminou
4、sMaterials(Pycnometer Method)D95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD139 Test Method for Float Test for Bituminous MaterialsD140 Practice for Sampling Bituminous MaterialsD1665 Test Method for Engler Specific Viscosity of TarProducts3.Physical Requirem
5、ents3.1 The tar shall conform to the requirements in Table 1.4.Sampling4.1 The material shall be sampled in accordance withPractice D140.5.Test Methods5.1 The properties enumerated in Table 1 shall be deter-mined in accordance with the following methods,with theexception of the test specified in 5.1
6、.3:5.1.1 WaterTest Method D95.5.1.2 Specific GravityTest Method D70.5.1.3 Specific ViscosityTest Method D1665.The resultsshall be reported as specific viscosity compared with water at25C.5.1.4 Float TestTest Method D139.5.1.5 DistillationTest Method D20.5.1.6 Softening PointTest Method D36.5.1.7 Tot
7、al BitumenTest Method D4.1This specification is under the jurisdiction of ASTM Committee D04 on Roadand Paving Materials and is the direct responsibility of Subcommittee D04.43 onSpecifications and Test for Tar and Tar Products.Current edition approved July 1,2016.Published August 2016.Originallyapp
8、roved in 1938.Last previous edition approved in 2011 as D490 92(2011).DOI:10.1520/D0490-92R16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summ
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14、rom the Copyright Clearance Center,222Rosewood Drive,Danvers,MA 01923,Tel:(978)646-2600;http:/ 1 Requirements for TarGradeRT-1GradeRT-2GradeRT-3GradeRT-4GradeRT-5GradeRT-6GradeRT-7Water by volume%,max2.002.002.002.001.51.51.0Specific gravity at 25/25C(77/77F),min1.081.081.091.091.101.101.12Specific
15、viscosity:AEngler,50 mL:at 40C(104F)at 50C(122F)5 to 8.8 to 13.13 to 22.22 to 35.17 to 26.26 to 40.Float test,As:at 32C(89.6F)at 50C(122F).50 to 80.Distillation test on water-freematerialTotal distillate,mass%:to 170C(338F)7.0 max7.0 max7.0 max5.0 max5.0 max5.0 max3.0 maxto 200C(392F).to 235C(455F).
16、to 270C(518F)35.0 max35.0 max30.0 max30.0 max25.0 max25.0 max20.0 maxto 300C(572F)45.0 max45.0 max40.0 max40.0 max35.0 max35.0 max30.0 maxSoftening point(ring-and-ballmethod)of residue fromdistillation test30 to 60C(86 to 140F)30 to 60C(86 to 140F)35 to 65C(95 to 149F)35 to 65C(95 to 149F)35 to 70C(95 to 158F)35 to 70C(95 to 158F)35 to 70C(95 to 158F)Total bitumen(soluble incarbon disulfide)weight%,min88888888838378GradeRT-8GradeRT-9GradeRT-10GradeRT-11GradeRT-12GradeRT.C.B.-5GradeRT.C.B.-6Water