1、Designation: D 490 92 (Reapproved 2005)Standard Specification forRoad Tar1This standard is issued under the fixed designation D 490; 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
2、 indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers 14 grades of tar as follows:RT-1, RT-2, RT-3, RT
3、-4, RT-5, RT-6, 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 andBall Apparatus)D70 Test Method for Specific
4、 Gravity and Density ofSemi-Solid Bituminous MaterialsD95 Test Method for Water in Petroleum Products andBituminous Materials by DistillationD 139 Test Method for Float Test for Bituminous MaterialsD 140 Practice for Sampling Bituminous MaterialsD 1665 Test Method for Engler Specific Viscosity of Ta
5、rProducts3. Physical Requirements3.1 The tar shall conform to the requirements in Table 1.4. Sampling4.1 The material shall be sampled in accordance withPractice D 140.5. Test Methods5.1 The properties enumerated in Table 1 shall be deter-mined in accordance with the following methods, with theexcep
6、tion of the test specified in 5.1.3:5.1.1 WaterTest Method D95.5.1.2 Specific Gravity Test Method D70.5.1.3 Specific ViscosityTest Method D 1665. The resultsshall be reported as specific viscosity compared with water at25C.5.1.4 Float TestTest Method D 139.5.1.5 Distillation Test Method D20.5.1.6 So
7、ftening Point Test Method D36.5.1.7 Total Bitumen Test 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 Tests for Tar and Tar Products.Current edition approved Dec. 1
8、, 2005. Published December 2005. Originallyapproved in 1938. Last previous edition approved in 2001 as D 490 92 (2001).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
9、to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentione
10、din this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, 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
11、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 International Headquarters. Your comments will receive careful consideration at a meeting of
12、theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing 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 C
13、700, 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).TABLE 1
14、Requirements for TarGradeRT-1GradeRT-2GradeRT-3GradeRT-4GradeRT-5GradeRT-6GradeRT-7Water by volume %, max 2.00 2.00 2.00 2.00 1.5 1.5 1.0Specific gravity at 25/25C(77/77F), min1.08 1.08 1.09 1.09 1.10 1.10 1.12Specific viscosity:AEngler, 50 mL:at 40C (104F)at 50C (122F)5to8.8to13.13 to 22.22 to 35.1
15、7 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 max 7.0 max 7.0 max 5.0 max 5.0 max 5.0 max 3.0 maxto 200C (392F) . . . . . . .to 235C (455F) . . . . . . .to 270C (518F) 35.0 max 35.0 max 30.0 max
16、30.0 max 25.0 max 25.0 max 20.0 maxto 300C (572F) 45.0 max 45.0 max 40.0 max 40.0 max 35.0 max 35.0 max 30.0 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
17、to 158F)35 to 70C(95 to 158F)Total bitumen (soluble incarbon disulfide)weight %, min88 88 88 88 83 83 78GradeRT-8GradeRT-9GradeRT-10GradeRT-11GradeRT-12GradeRT.C.B.-5GradeRT.C.B.-6Water by volume %, max none none none none none 1.0 1.0Specific gravity at 25/25C(77/77F), min1.14 1.14 1.15 1.16 1.16 1
18、.09 1.09Specific viscosity:AEngler, 50 mL:at 40C (104F)at 50C (122F).17 to 26.26 to 40Float test,Asat 32C (89.6F)at 50C (122F)80 to 120.120 to 200.75 to 100.100 to 150.150 to 220.Distillation test on water-freematerialTotal distillate by masspercent:to 170C (338F) 1.0 max 1.0 max 1.0 max 1.0 max 1.0
19、 max 2.0 to 8.0 2.0 to 8.0to 200C (392F) . . . . . 5.0 min 5.0 minto 235C (455F) . . . . . 8.0 to 18.0 8.0 to 18.0to 270C (518F) 15.0 max 15.0 max 10.0 max 10.0 max 10.0 max . .to 300C (572F) 25.0 max 25.0 max 20.0 max 20.0 max 20.0 max 35.0 max 35.0 maxSoftening point (ring-and-ballmethod) of resid
20、ue fromdistillation test35 to 70C(95 to 158F)35 to 70C(95 to 158F)40 to 70C(104 to 158F)40 to 70C(104 to 158F)40 to 70C(104 to 158F)40 to 70C(104 to 158F)40 to 70C(104 to 158F)Total bitumen (soluble incarbon disulfide) by mass %,min78 78 75 75 75 80 80AThe consistency limits are subdivided into grades RT-1 to RT-12, inclusive, and grades RT.C.B.-5, RT.C.B.-6, so that material may be chosen to meet the localconditions of temperature, road conditions, and climate.D 490 92 (2005)2
