SHRP-A-379 traducir

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NOTE 4.--Two BBR beams (requiring PAV material) are required at each test temperature. In addition, four DT samples may also be needed at each test temperature. A minimum of two test temperatures wilI be required. 6.10 Complete steps 6.1 through 6.9 during the first day of testing. This will allow further testing to begin on the second day, when the PAV procedure is complete. 6.11 At the conclusior_ of the PAV procedure, carefully remove the residue from the vessel and combine individual pans of the same aged asphalt binder. Prepare two bending beam specimens for each test temperature according to TP1. Retain sufficient residue to prepare four direct tension specimens for each test temperature if required. 6.12 Perform the DSR test (TP5) on the PAV residue. Begin at a test temperature of 16°C for PG 52; 19°C for PG 58; 22°C for PG 64; and 28°C for PG 70, unless there is other information to suggest the temperature at which G'sin 8 is < 5000 kPa. Decrease or increase the test temperature at 3.0°C increments until the value for G'sin 8 exceeds 5000 kPa. 6.13 Determine the beginning test temperature for the BBR test (TP1) on the PAV residue from table 1 of MP1. Use the starting PG determined in section 6.3 and the lowest temperature from section 6.12 where the value for G'sin 8 did not exceed 5000 kPa, unless there is other information to suggest the temperature at which the stiffness is < 300.0 MPa, and the slope m is > 0.300. 6.14 Test pairs of BBR specimens according to TP1. Begin at the test temperature selected in section 6.13 and increase at 6.0°C increments, until a stiffness and slope meeting the requirements of MP1 are obtained. Test fresh BBR specimens at each temperature. Determine the extent of physical hardening, report the creep stiffness (S) and the slope (m) of the log creep stiffness versus log time relationship measured at 1 and 24 hours. Prepare two sets each of two BBR specimens of original asphalt binder. Test one set after 1 hour of conditioning and the second set after 24 hours of conditioning. The latter is conducted at the lowest grading test temperature (Tmi_+ 10°C). 6.15 Certain asphalt binders may satisfy the MP1 slope requirement at substantially lower temperatures than they satisfy the stiffness requirement. If the creep stiffness is between 300 and 600 MPa at a test temperature at which the slope (m) is > 0.300, it may be possible to satisfy the DT (TP3) failure strain requirement in lieu of the creep stiffness requirement. Test four DT specimens according to TP3 at the test temperature at which m > 0.300, and determine if the failure strain is > 1.0%. 6.16 If the failure strain is < 1.0%, test additional sets of four DT specimens. Increase the test temperature in 6.0°C increments until a failure strain > 1.0% is obtained. Determine the test temperature at which m > 0.300 and the creep stiffness is < 300.0 MPa, or, if the creep stiffness is between 300.0 and 600.0 MPa, the failure strain is > 1.0%. 6.17 Using the results of steps 6.12 through 6.16, determine the final grade of the asphalt binder. 228
7. TEST PROCEDURE FOR VERIFYING THE NOMINAL GRADE OF AN ASPHALT BINDER 7.1 Prepare samples and test specimens using the procedures specified in the test methods performed. In the case where the grade of the asphalt binder is being verified, approximately 250 g of unaged asphalt binder is required to complete the tests with the necessary replicates. 7.2 Begin conditioning asphalt binder in the rolling thin film oven (RTFO) or thin film oven (TFO). Condition a sufficient amount of asphalt binder depending on the type and number of tests to be performed. NOTE 5.--Two BBR beams that require PAV material are needed. In addition, four DT specimens requiring PAV material may also be required. Only one test temperature will be required. Approximately 100 g of RTFO or TFO residue will be required. 7.3 Perform the DSR test (TP5) on the original asphalt binder at the test temperature indicated by the high-temperature grading designation. For example, test a PG 70-16 asphalt binder at 70°C. The value for G*/sin 8 must be _ 1.0 kPa to meet the requirements of MP1. NOTE 6.--This step verifies the starting PG. For example, if G*/sin 8 _> 1.00 kPa at 58°C, the high temperature grading designation for the asphalt binder is PG 58-. NOTE 7.--If the asphalt binder fails to meet the requirements of MP1 for the grade at which it has been designated, it may be treated as a binder of unknown grade and tested according to section 6. 7.4 Determine the flash point on a sample of original binder using T48. The flash point must be greater than 230°C to meet the requirements of MP1. 7.5 Determine the viscosity of the original asphalt binder at 135°C using ASTM D 4402. The viscosity must not exceed 3 Pa.s to meet the requirements of MP1. 7.6 After the RTFO test (T240) or TFO test (T179) is complete, determine the mass loss of the original asphalt binder. The mass loss must be _ 2.20 kPa to meet the requirements of MP1 (note 7). 7.9 Age a sufficient quantity of RTFO or TFO residue in the PAV (PP1). Use an aging temperature of 90°C for binders having a high-temperature grading designation of PG 229
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SHR -A-379 The SUPERPAVE Mix Design
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Acknowledgments The research descri
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M-003 Determining the Shear and Sti
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Introduction This volume of the Fin
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Table 2. AASHTO and Other Test Meth
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T48 Method of Test for Flash and Fi
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10. KEY WORDS Asphalt binder, aspha
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Table 1. Performance-Graded Asphalt
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2.2 ASTM Standards: C802 Conducting
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7. APPARATUS 7.1 Bending Beam Rheom
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7.6 Calibrated Thermometers--Calibr
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11.3 Perform a daily quality contro
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NOTE9.--The specified preload on th
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dG d2 --_ I d __
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CO U_ P z_ MLLI L_O° _ _ _c_ r_ j4
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m) _L wO O_ W _Z _W W_ Z w W_ 0 _ w
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1.4 Maximum bending stress--The max
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Sy = log S(8) + log S(15) + ... log
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Z 1.3 1.2 1.1 , , .... J 1 • '; "
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T240 Test Method for Effect of Heat
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5.2 The complex shear modulus is an
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7. HAZARDS 7.1 Standard laboratory
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9.1.1.2.3 A thermocouple probe shal
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Typically, reliable test results ma
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figure 1 can be generated by gradua
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150 "ZERO" STRAIN VALUE O" STRAIN V
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5.3 For evaluating an asphalt binde
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time. A change in the load signal e
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9.1.1 Load cell--Verify calibration
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11.2 Immediately after demolding, p
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13.1.5 the average failure strain,
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IA A 5,0 I 6 0 86,0 9,5 FILLET O,K.
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--__6_- -_A AL AL _ o 0 _ _ _ "_ f-
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I __;___ i --_'-- :" (_ . /_/Spring
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points within the pressure vessel a
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NOTE7.--Aging temperature in the PA
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13. KEY WORDS Accelerated aging, el
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to temperaturetransducerand te_llpe
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3. SUMMARY OF METHOD 3.1 The paving
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7. PRECAUTIONS 7.1 Solvents should
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9.4 Final Extraction and Recovery 9
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Glass Wool Plug Figure 2. Extractio
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5.761 in I.D. 6 holes 3/16 in I.D.
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1/4 I.D. 5 3/4 in I.D. 6 holes 5/16
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Polypropylene Cloth Filter I" .....
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114 in I.D. 11 1/4 in I.D. 8 holes
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3. SUMMARY OF TEST METHOD 3.1 A sol
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drying should be re-dried. Caution:
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8.16 Clean the funnels, volumetric
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Adsorption/Desorption Testing Data
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2.3 ASTM Standards: D 4402 Measurem
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5.6.3 Start time of test; 5.6.4 Spe
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9.1.1 Weigh the aggregate fractions
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11. CALCULATIONS AND INTERPRETATION
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3.1 Test System--The test system is
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4.3 Determine Air Void Content--Det
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• vertical displacement of the sp
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The following engineering quantitie
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the axial actuator is under closed
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Figure 2. Platen-Specimen Assembly
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Figure 4. Positioning of Vertical a
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tO0 © © ....... OT...=.c on A TEM
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Standard Method of Test for Determi
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3. SUMMARY OF METHOD 3.1 This test
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6.5.1 For analog strip-chart record
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8. PROCEDURE 8.1 Measure the bulk s
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movement per minute. Both the horiz
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If E is greater than 0.01, substitu
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Table 1. Correction Factors for Hor
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Figure 2. Specimen Loading Frame wi
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Standard Method of Test for Determi
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6. APPARATUS 6.1 Environmental Cond
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9.3 Heat or cool the asphalt concre
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pressed. Otherwise, measure and rec
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10.7.2.3 Apply a repeated axial com
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11.3.1 Peak Stress (kPa) per load c
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12.1.3 Aggregate Type and Gradation
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Specimen Temperature Hi/Lo Limit Pr
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i Pressure Differential Gauge /_ 0
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I0 0 0 0 0 0 0 0 0 Ooo00 0 0 '_,Oo
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" Total Elastic 0 Ei._ 0 121 Plasti
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T201 Method of Test for Kinematic V
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6.4.4 One metal spatula or spoon 6.
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11.1.1 Asphalt Binder Grade 11.1.2
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D 1561-81a Preparation of Bituminou
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After filling, close all containers
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l i /l Gmb = . (1) B-Cwhere A = Mas
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8. REPORT 8.1 The report shall incl
Page 181 and 182: 1 RAMP, ..:i!i!iiiii:i:i:i:i:i:i:i:
Page 183 and 184: Standard Method of Test for Determi
Page 185 and 186: 3.3 Epoxy Nut to Neutral Axis of Sp
Page 187 and 188: 5.1.6 Cumulative Dissipated Energy
Page 189 and 190: plot 6.1.11 Plot of Dissipated Ener
Page 191 and 192: Figure 2. Nut Epoxied to Neutral Ax
Page 193 and 194: Figure 4. Nut/Block/Screw/LVDT Conn
Page 195 and 196: 0 OO £ m -r"_ mlO 5 10 4 , [ 'T I
Page 197 and 198: As a minimum, the test system, shou
Page 199 and 200: With the ink marker, trace diar_.et
Page 201 and 202: 5. CALCULATIONS A_er the specime_ f
Page 203 and 204: Step Motor L,.._ Loading Rod Swivel
Page 205 and 206: ATHENA TEMPERATURECONTROLLER ii:!i:
Page 207 and 208: Standard Practice for The Laborator
Page 209 and 210: 2.2 SHRP Documents B-006 Extraction
Page 211 and 212: using the same SUPERPAVE ® perform
Page 213 and 214: must be used with the modifier from
Page 215 and 216: 8.2.3 Sections 8.3 and 8.4 present
Page 217 and 218: 8.8.2 Conditioning and Testing--Car
Page 219 and 220: 9. LABORATORY EVALUATION OF AGGREGA
Page 221 and 222: shear, volumetric and frequency swe
Page 223 and 224: 12.2 The HMA plant should produce t
Page 225 and 226: Table 1. Modifier Selection and Cha
Page 227 and 228: Table 5. Guidelines for Binder Modi
Page 229 and 230: Standard Practice for Grading or Ve
Page 231: 6. TEST PROCEDURE FOR GRADING AN UN
Page 235 and 236: 8. REPORT 8.1 If the grade of the a
Page 237 and 238: 1.4 In order to attain adequate pre
Page 239 and 240: 5.4 Calculate the bulk specific gra
Page 241 and 242: Standard Practice for Measurement o
Page 243 and 244: Table 1. Test Matrix for Level 2 Mi
Page 245 and 246: 6. SPECIMEN PREPARATION 6.1 All tes
Page 247 and 248: Record axial deformation, shear def
Page 249 and 250: 7.3.5 Since the specimen will be su
Page 251 and 252: NOTE 15.--At each temperature, the
Page 253 and 254: Table 7. Time Estimate for Level 2
Page 255: NOTEA1.2.--This stress-controlled t
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