PHASE II REPORT - Caltrans

CALTRANS Fugro Consultants, Inc.
Contract 65A0151 Project 1101-3139
Phase II Report December, 2010
TABLE OF CONTENTS
1.0 CHAPTER 1 EXECUTIVE SUMMARY.................................................................................... 1
2.0 CHAPTER 2 INTRODUCTION................................................................................................ 4
2.1 BACKGROUND............................................................................................................. 4
2.2 OBJECTIVES OF THE POOLED FUND STUDY........................................................... 5
2.3 PURPOSE OF THE PHASE II REPORT ....................................................................... 5
2.4 REFERENCES .............................................................................................................. 6
3.0 CHAPTER 3 DEVELOPMENT OF A RATIONAL MIX DESIGN FOR SLURRY SYSTEMS ..... 7
3.1 GENERAL ..................................................................................................................... 7
3.2 TECHNICAL APPROACH ............................................................................................. 7
3.3 DESIRABLE FEATURES FOR A NEW MIX DESIGN METHOD.................................... 8
3.4 SLURRY SEAL VERSUS MICROSURFACING............................................................. 9
3.5 LABORATORY TESTS FOR INDIVIDUAL COMPONENTS ........................................ 10
3.5.1 Aggregates........................................................................................................ 10
3.5.2 Mineral Filler ..................................................................................................... 13
3.5.3 Emulsified Asphalt and Asphalt Residue ........................................................... 13
3.5.4 Control Additives............................................................................................... 14
3.5.5 Water ................................................................................................................ 15
3.6 LABORATORY TESTS FOR THE SLURRY MIXTURE ............................................... 15
3.6.1 Tests for Mixing, Spreading and Setting Properties........................................... 17
3.6.2 The European Mixing Test ................................................................................ 18
3.6.3 The Automated Cohesion Test (ACT) ............................................................... 20
3.6.4 The Cohesion-Abrasion Test (CAT) .................................................................. 22
3.6.5 The Loaded Wheel Test (LWT) ......................................................................... 23
3.6.6 Long Term Performance Tests.......................................................................... 24
3.6.7 The Asphalt Pavement Analyzer Test (APA)..................................................... 26
3.7 PROPOSED S3 SLURRY SYSTEMS MIX DESIGN METHOD.................................... 26
3.7.1 Step 1: Materials Selection.............................................................................. 28
3.7.2 Step 2: Create a Mix Matrix and Determine Mix Constructability ..................... 28
3.7.3 Step 3: Allowable Field Adjustment ................................................................. 28
3.7.4 Step 4: Determine the Optimum Binder Content.............................................. 29
3.7.5 Step 5: Evaluate the Cohesion Properties at Various Curing Conditions ......... 29
3.7.6 Step 6: Evaluate the Long Term Properties of the Mixture............................... 30
3.7.6.1 Abrasion Resistance .................................................................... 30
3.7.6.2 Water Resistance......................................................................... 30
3.7.6.3 Deformation ................................................................................. 30
4.0 CHAPTER 4 LABORATORY EVALUATION OF PROPOSED TEST METHODS ................... 31
4.1 EXPERIMENTAL MATRIX........................................................................................... 31
4.2 LABORATORY TEST METHODS DEVELOPMENT.................................................... 32
4.2.1 Development of the Automated Mixing Test (AMT) ......................................... 32
4.2.2 Development of the Automated Cohesion Test (ACT) ..................................... 53
4.2.3 Development of the Cohesion-Abrasion Test (CAT)........................................ 58
4.2.4 Effect of Tack Coat.......................................................................................... 66
4.2.5 High Traffic and Rut Resistant System CAT Results ....................................... 67
4.3 LABORATORY TEST METHODS EVALUATION ........................................................ 70
4.3.1 Evaluation of Automated Mixing Test (AMT).................................................... 70
4.3.2 Evaluation of Cohesion-Abrasion Test (CAT) .................................................. 72
4.4 REVISED MIX DESIGN METHOD (VERSION 2)......................................................... 74
5.0 CHAPTER 5 RUGGEDNESS TESTING................................................................................ 78
5.1 PURPOSE OF THE EXPERIMENTS........................................................................... 78
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