SHRP-A-379 traducir

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9.3 The length of the total test period is also affected by the initial time required to set up the systems and calibrate the measurement devices. A more efficient testing schedule is achievable if several paving mixes are tested simultaneously; the average time spent per paving mix will be less than, for instance, the time needed when only one paving mix is being tested. 9.4 Table 6 presents an estimated testing schedule for a complete levet 3 mix design, involving three asphalt binder contents and the testing of 24 specimens. Table 6. Testing Schedule for a Level 3 Mix Design 1 i i Ill i i Activity Time Period • Compact specimens and cut parallel faces. Days 1 through 4 • Measure specimen dimensions arm specific gravities. • Set up equipment and calibrate measurement devices. • Bond specimens to platens and mount LVDT screws. • Run repeated shear test (constant stress ratio) at Day 5 Te_(eD) • Run frequency sweep and simple shear tests at am of Day 6 4°C. • Run frequency sweep and simple shear tests at pm of Day 6 20°C. * Run frequency sweep and simple shear tests at am of Day 7 40°C. • Run volumetric and uniaxial strain tests at 4°C. pm of Day 7 through am of Day 8 • Run volumetric and uniaxial strain tests at 20°C. pm of Day 8 • Run volumetric and uniaxial strain tests at 40°C. am of Day 9 • Preparation of data flies for analys_s in pm of Day 9 SUPERPAVE ® software. ii I I I I 9.5 A level 2 mix design requires significantly fewer specimens and tests, and consequently, substantially less testing time. Table 7 is a guide to the time required to accomplish different segments of the procedure for one trial paving mix (one asphalt binder content) under normal laboratory conditions in a level 2 mix design. 9.6 Table 8 presents an estimated testing schedule for a complete level 2 mix design, involving three asphalt binder contents and the testing of 18 specimens. 250
Table 7. Time Estimate for Level 2 Mix Design Procedure or Test Method Number of Tests Number of Time Oars) per Temperature Temperatures Compaction and Preparation of Six - - 4 Specimens Bonding to Platens and Mounting of - - 1 LVDT Screws Repetitive Shear at Constant Stress 2 1 3 Ratio Frequency Sweep 2 1 2 Simple Shear 2 1 1 Data Preparation - - 2 Temperature Changes - - 2 Total Hours: 15 Table 8. Testing Schedule for a Level 2 Mix Design Activity Time Period • Compact specimens and cut parallel faces. Days 1 through 3 • Measure specimen dimensions and specific gravities. • Set up equipment and calibrate measurement devices. • Bond specimens to platens and mount LVDT screws. • Run repeated shear test (constant stress ratio) at Day 4 T_u(PD). • Run frequency sweep and simple shear tests at am of Day 5 To_(FC). • Run frequency sweep and simple shear tests at pm of Day 5 T_(PD). • Preparation of data files for analysis in am of Day 6 SUPERPAVE ® software. 10. REPORT 10.1 Report all test results as computer files compatible with and readable by the SUPERPAVE ® Specification, Mix Design and Support Program. 251
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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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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
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1 RAMP, ..:i!i!iiiii:i:i:i:i:i:i:i:
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3.3 Epoxy Nut to Neutral Axis of Sp
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5.1.6 Cumulative Dissipated Energy
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plot 6.1.11 Plot of Dissipated Ener
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Figure 2. Nut Epoxied to Neutral Ax
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Figure 4. Nut/Block/Screw/LVDT Conn
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0 OO £ m -r"_ mlO 5 10 4 , [ 'T I
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As a minimum, the test system, shou
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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 and 232: 6. TEST PROCEDURE FOR GRADING AN UN
Page 233 and 234: 7. TEST PROCEDURE FOR VERIFYING THE
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: NOTE 15.--At each temperature, the
Page 255: NOTEA1.2.--This stress-controlled t
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