PHASE II REPORT - Caltrans

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Procedure for Combination of Components: The components were combined in various ways in an attempt to obtain an optimum system. The methodology in the AMT is to determine the amount of each of component materials using TB-113, placing them in the mixing bowl, and using the AMT to pre-blend them. Stirrer Speed: Stirrer speeds were varied to create mixing that did not seclude material on the sides of the bowl. TB-113 consistency criteria were used to make this determination. A series of speeds were varied to arrive at the most effective to combine the ingredients without “splashing” them out of the bowls. The speeds were 50, 60, 200, 500, and 1000 revolutions per minute (rpm). The mixing speed recommended for the proposed test method was 50 rpm. Mix Consistency and Type: Mixes that were classified as Moderate Viscosity (MV), Stiff (St), and Low Viscosity (LV) were tested to evaluate mixing torque and combinations of consistencies to ascertain if the mixing torque range could be used as a rheological classification. The results indicated clearly that the mixing torque was dependant on the rate of cohesion build up and presumably the reaction rate between the aggregate and the emulsion type. That is, microsurfacing systems and slurry quick set systems could be differentiated by mixing torque and its change with time. AMT Results A) Preliminary Container/Stirrer/Speed Combination: A single mix, mix M2, was selected to determine the best container/stirrer combination as it was determined to be the most stable mix from TB-113. In addition, M2 exhibited good consistency (MV) and an acceptable mixing time between 3 to 5 minutes. The stirrer type was matched with the container size to provide some separation between the sides of the stirrer and the walls of the container. The purpose of this was to accommodate the largest stone in the mix. This was checked and assessed by observing the mix and its consistency. The mix speed was varied and the mix characteristics were noted. The selection of the container, stirrer, and speed was based on the results that are contained in Table 4.3. The proposed AMT configuration is shown in Figure 4.6. The results showed that the best combination for the AMT setup is as follows: • Small stainless steel bowl • Standard propeller stirrer 43
• 50 rpm mixing speed This configuration generated a mix that was complete with little to no hang up material on the sides of the cup rated as “Good Mixing” (GM). An even mixing trace for the configuration is shown in Figure 4.7. The sudden spikes in the graph are due to aggregate caught in the gap between the bowl and the stirrer. The torque is noted on the vertical axis and time in the horizontal axis. In this case, an increase in torque from 8kg-cm to 10kg-cm was observed. Figure 4.6: AMT Configuration of Standard Propeller and Small Stainless Steel Bowl. Figure 4.7: Screen Shot of AMT Using Small Stainless Steel Bowl and Standard Propeller Configuration at 50 rpm for M2 44 Aggregate caught on side of the bowl
Page 1 and 2: PHASE II REPORT Slurry Seal / Micro
Page 3 and 4: CALTRANS Fugro Consultants, Inc. Co
Page 5 and 6: 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: Mixing Containers type and size: a.
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 and 58: Figure 4.14: AMT Trace for Mix M1,
Page 59 and 60: Figure 4.16: Automated Cohesion Tes
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
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Page 91 and 92: shall perform the mix design. The p
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Page 97 and 98: 6.7 METHOD OF MEASUREMENT 6.7.1 ARE
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Delays in the progress of the resea
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2.4 IDA Werke EUROSTAR Power contro
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4.3 If the mix does not break, the
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8.0 PROCEDURE 8.1 Maintain the aggr
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11.2.1.1 BT: brown color transfer t
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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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PHASE II REPORT - Caltrans

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