NCHRP Report 712:

Optimization of Tack Coat for HMA Placement

Status: Not for Sale

Size: 146 pages, 8.5 x 11

Publication Year:2012

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Authors:
Joe Button; Mostafa A Elseifi; James A Scherocman; Louay N Mohammad; Abraham Bae; Nachiketa Patel; Transportation Research Board
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TRB's National Cooperative Highway Research Program (NCHRP) Report 712: Optimization of Tack Coat for HMA Placement presents proposed test methods for measuring the quality and performance characteristics of tack coat in the laboratory and the field, and includes a training ...
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Table of Contents
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Front Matter	i-xi
Summary	1-3	(skim)
1.3 Research Scope	4-4	(skim)
1.4 Research Approach	5-6	(skim)
2.1 Tack Coat Materials	7-7	(skim)
2.3 Tack Coat Breaking and Setting Time	8-8	(skim)
2.4.1 Equipment	9-9	(skim)
2.4.2 Proper Tack Coat Application	10-10	(skim)
2.5.1 Laboratory Characterization of Tack Coats	11-13	(skim)
2.6 Worldwide Survey	14-18	(skim)
3.2.1 HMA Pavement Surface Preparation	19-19	(skim)
3.2.3 Tack Coat Application	20-21	(skim)
3.2.4 Overlay Construction	22-23	(skim)
3.2.6 Specimen Coring and Conditioning	24-26	(skim)
3.3 Experiment Plan I: Development of a Test Device to Evaluate the Quality of the Bond Strength of Tack Coat Spray Application in the Field	27-27	(skim)
3.6 Experiment Plan IV: Effects of Test Temperature and Its Relationship with Tack Coat Rheology	28-29	(skim)
3.8 Experiment Plan VI: Effects of Surface Texture and Permeability on Interface Shear Strength	30-31	(skim)
3.9 Theoretical Investigation	32-34	(skim)
4.1.2 Types of Tack Coat Applied to Different Pavement Surfaces	35-36	(skim)
4.1.3 Findings Related to Tack Coat Application Methods	37-43	(skim)
4.1.4 Findings Related to Tack Coat Application	44-44	(skim)
4.2 Experiment I: Development of a Test Device to Evaluate the Quality of the Bond Strength of Tack Coat Spray Application in the Field	45-45	(skim)
4.2.2 Second Generation of LTCQT	46-47	(skim)
4.2.3 Development of Tack Coat Test Procedure Using LTCQT	48-48	(skim)
4.2.5 Effect of Tack Coat Temperature on the Ultimate Tensile Strength	49-50	(skim)
4.3 Experiment II: Rheological Properties of Tack Coat Materials and Its Relationship to Bond Strength	51-51	(skim)
4.3.2 Relationship Between LTCQT Test Results and Tack Coat Rheological Properties	52-52	(skim)
4.4 Experiment III: Development of a Laboratory Test Procedure to Measure the Interface Bond Strength	53-54	(skim)
4.4.1 Effects of Tack Coat Characteristics on Interface Shear Strength	55-57	(skim)
4.4.2 Effect of Confining Pressure	58-59	(skim)
4.4.3 Effect of Dusty Conditions of HMA Surface	60-60	(skim)
4.5.1 Interface Bond Strength at Various Temperatures	61-64	(skim)
4.5.3 Relationship Between Interface Shear Strength and Tack Coat Rheology	65-65	(skim)
4.6.1 Effects of Tack Coat Type and Residual Application Rate	66-67	(skim)
4.6.3 Effects of Surface Wetness	68-68	(skim)
4.7 Experimental VI: Effects of Texture and Permeability on Tack Coat Bond Strength	69-71	(skim)
4.8 Theoretical Investigation	72-79	(skim)
Section 5 - Conclusions	80-81	(skim)
References	82-83	(skim)
Appendix A - Worldwide Survey Questionnaire	84-88	(skim)
Appendix B - ATacker Displacement Rate Verification Experiment	89-89	(skim)
Appendix C - Standard Test Method for Assessing Tack Coat Installation Quality Using the LTCQT	90-96	(skim)
Appendix D - Comparison of the LISST Device and the Simple Shear Tester	97-97	(skim)
Appendix E - Standard Test Procedure for Measuring Interface Bond Strength in the Laboratory Using the LISST	98-105	(skim)
Appendix F - Tack Coat Training Manual	106-134	(skim)
Abbreviations used without definitions in TRB publications	135-135	(skim)

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 712: Optimization of Tack Coat for HMA Placement presents proposed test methods for measuring the quality and performance characteristics of tack coat in the laboratory and the field, and includes a training manual presenting proposed construction and testing procedures for tack coat materials.

Links to appendixes B and D to NCHRP Report 712, which are available only in electronic format, are below:
• Appendix B: ATacker™ Displacement Rate Verification Experiment
• Appendix D: Comparison of the LISST Device and the Simple Shear Tester (SST)

NCHRP Report 712:

Optimization of Tack Coat for HMA Placement

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