PHASE II REPORT - Caltrans

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Table 4.5: Preliminary Evaluation of Consistency and Mixing Torque System Consistency Mixing Torque, N-cm Mixing Time, min Spread Time, min M1 Stiff (St) 9 – 10 3.5 4.9 M2 Moderate (MV) 8 – 9 7 >10 M3 Soupy (S)/LV 6 – 7 >10 >10 Conclusions: The mix procedure can distinguish between very fast and fast setting systems. The procedure can show the differences in mixing and spread time for different systems. It also shows mixing torque correlation with the mix characteristics of TB-113. 4.2.2 Development of the Automated Cohesion Test (ACT) The existing ISSA test method for cohesion, TB-139, uses a hand held torque wrench to apply a load to a test specimen 0.23 inches (6mm) or 0.39 inches (10mm) in diameter depending on the top size of the aggregate. Torque measurements are made at intervals of 30, 60, 90, 150, 210, and 270 minutes after casting the specimens. The major difficulty with this procedure is that the application of torque is very operator dependent. To overcome this problem, the project team contracted with Temple Systems, Inc. of Dayton, Ohio to develop an automated device to perform this test. The device is connected to a computer and is controlled by software that lowers a pressure foot on the test specimen. The operator specifies the amount of rotation of the foot at the time intervals specified. The rotation can be set from 45 to 360 degrees. During rotation, the device transmits torque values to the computer. When complete, the torque measurements are graphically displayed. The “first article” design of the Automated Cohesion Test device has been developed by Temple Systems Lab of Dayton, Ohio and it is shown in Figure 4.16. Testing on sandpaper was completed to assure that the device functioned properly. The device was then sent to MACTEC’s laboratory in Phoenix, Arizona, to complete the testing matrix. 53
Figure 4.16: Automated Cohesion Test – Under Development Limited comparison testing with both the automated and the conventional cohesion testers was carried out by Temple Systems and MACTEC. The results are presented in Figures 4.17 and 4.18. Torque (kg-cm) 14 12 10 8 6 4 2 0 Temple Systems - Granite Mix 0 50 100 150 Minutes 54 Manual Automated Figure 4.17: Cohesion Testing Results from Temple Systems – Granite Mix
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PHASE II REPORT Slurry Seal / Micro
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CALTRANS Fugro Consultants, Inc. Co
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CALTRANS Fugro Consultants, Inc. Co
Page 7 and 8: For the Phase II work, the research
Page 9 and 10: 2.0 CHAPTER 2 INTRODUCTION 2.1 BACK
Page 11 and 12: 3.0 Findings from the ruggedness te
Page 13 and 14: START Test Mix Components Accept Ma
Page 15 and 16: For all the above considerations, t
Page 17 and 18: Type II and III microsurfacings are
Page 19 and 20: “M” Refers to an ASSHTO Standar
Page 21 and 22: Viscosity: A property of the mix th
Page 23 and 24: 3.6.2 The European Mixing Test Base
Page 25 and 26: Mix Torque kg-cm 70 60 50 40 30 20
Page 27 and 28: Clamping Pressure 200Kpa Interface
Page 29 and 30: Samples Holes 0.8 inches (~0.20 mm
Page 31 and 32: • Abrasion: CAT. This test may be
Page 33 and 34: 3.7.1 Step 1: Materials Selection T
Page 35 and 36: 3.7.6 Step 6: Evaluate the Long Ter
Page 37 and 38: 4.2 LABORATORY TEST METHODS DEVELOP
Page 39 and 40: Table 4.2.2: TB-113 Results for Mix
Page 41 and 42: In addition to the “base mixture
Page 43 and 44: The resulting mix had the following
Page 45 and 46: Features: Produces a tangential flo
Page 47 and 48: Mixing Containers type and size: a.
Page 49 and 50: • 50 rpm mixing speed This config
Page 51 and 52: The shape of the traces for differe
Page 53 and 54: Figure 4.10: Mix M4 Trace with Stan
Page 55 and 56: The recommended mixing procedure fo
Page 57: Figure 4.14: AMT Trace for Mix M1,
Page 61 and 62: As illustrated in Figures 4.17 and
Page 63 and 64: Note that the ratio of the two aver
Page 65 and 66: • Dry Loss Method - Two identical
Page 67 and 68: Loss (%) 35 30 20 15 10 5 0 Effect
Page 69 and 70: The differences in the samples were
Page 71 and 72: Both systems were correctly defined
Page 73 and 74: Time (Min) Wet Loss M1 (g) Table 4.
Page 75 and 76: observation. For long term abrasion
Page 77 and 78: 4.3.2 Evaluation of Cohesion-Abrasi
Page 79 and 80: 4.4 REVISED MIX DESIGN METHOD (VERS
Page 81 and 82: Step 5: Evaluate the Cohesion Prope
Page 83 and 84: 5.0 CHAPTER 5 RUGGEDNESS TESTING 5.
Page 85 and 86: These levels will be far enough apa
Page 87 and 88: 5.3.3 ACT Test For this test, the c
Page 89 and 90: 6.1.2 AGGREGATE Mineral aggregate s
Page 91 and 92: shall perform the mix design. The p
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Page 99 and 100: Delays in the progress of the resea
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Page 103 and 104: 4.3 If the mix does not break, the
Page 105 and 106: 8.0 PROCEDURE 8.1 Maintain the aggr
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Note: Closing all other programs ru
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− Eurostar mixer - the parameter
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Figure A.5: Display of Functional U
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To stop the test, select the drop d
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2.3 ISSA TB-100, Test Method for We
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5.4 Suitable specimen casting mold
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8.2 The amounts of material compone
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9.2 Completely cover the specimen w
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APPENDIX C RESULTS OF RUGGEDNESS AM
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Figure C.2: Ruggedness Trials Trial
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Figure C.4: Ruggedness Trials Trial
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CEL#: 10-17749 LAB #: Date Tested:
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CAT: COHESION ABRASION TEST (FRENCH
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2.CAT-Cohesion Abrasion Test: Frenc
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GRADATION ANALYSIS FOR AGGREGATE A1
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Source: Lopke (A2) Aggregate: ISSA
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GRADATION ANALYSES FOR AGGREGATE A3
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SODIUM SULFATE SOUNDNESS FOR AGGREG
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SODIUM SULFATE SOUNDNESS FOR AGGREG
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ABRASION LOSS BY AASHTO T-96 FOR AG
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SAND EQUIVALENT FOR AGGREGATES A1,
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ABRASION LOSS BY ASTM D6928 FOR AGG
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CEL# 10-17749 Source: Sem Materials
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CEL# 10-17749 Source: VSS Emultech
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CEL# 10-17749 Source: Ergon Materia
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Automated Mixing Test Mix: M3 Agg:
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CEL#: 10-17749 1)apply tack coat to
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Aggregates: Emulsions: Mixes: CAT R
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ACT RESULTS FOR ALL MIXES TEST RESU
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ACT RESULTS FOR ALL MIXES 228
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not effective if placed on pavement
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Table F.1: Draft Outline for Refere
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David Peshkin will take the lead in
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Ride quality has been shown to impa
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agency will be held prior to constr
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An agency that desires to participa
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