Top-Down Cracking of Hot-Mix Asphalt Layers: Models for Initiation and Propagation (2010)

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ii 4.3.1 Summary of Top-down Cracking Performance Model Data ...............................113  4.3.2 Model Calibration .................................................................................................123  4.3.3 Validation of Model .............................................................................................127  4.3.4 Final Model Predictions .......................................................................................132  4.4 Summary of Findings .....................................................................................................137  5. Conclusions and Recommendations for Future Research .......................................................141  5.1 Conclusions .....................................................................................................................141  5.2 Recommendations for Future Research ..........................................................................142  References ....................................................................................................................................146  Appendix A: Development of the VECD-Based Model .............................................................. A-i  Appendix B: Development of the HMA-FM-Based Model ........................................................ B-i  Appendix C: Simulation Tools .................................................................................................... C-i 

iii ACKNOWLEDGMENTS The research reported herein was performed under NCHRP Project 1-42A by the Department of Civil and Coastal Engineering at the University of Florida (UF), and the Department of Civil, Construction, and Environmental Engineering at the North Carolina State University (NCSU). UF was the contractor for this study, with NCSU serving as the sub- contractor. Dr. Reynaldo Roque, P.E., Professor of Civil Engineering at UF, was the Principal Investigator. The other authors of this report were Dr. Y. Richard Kim, Professor of Civil Engineering at NCSU, and Murthy N. Guddati, Associate Professor of Civil Engineering at NCSU; Jian Zou, Research Assistant and Ph.D. Candidate at UF; and Cheolmin Baek, Senganal Thirunavukkarasu, and B. Shane Underwood, Research Assistants and Ph.D. Candidates at NCSU. The work was done under the general supervision of Professor Roque at UF.