This report presents mechanistic-based models for predicting the extent and severity of reflection cracking in hot-mix asphalt (HMA) overlays. These models were developed for use in the design and analysis of HMA overlays; they can be incorporated into the AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG) software. The report and accompanying software will guide pavement and construction engineers in identifying and specifying HMA overlays for asphalt and concrete pavements that will provide desired service life and performance. The information contained in the report will be of immediate interest to state pavement engineers and others concerned with the design and rehabilitation of asphalt and concrete pavements. Appendices A through T for NCHRP Report 669 are available online: Appendix A (Program flow charts) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixA.pdf; Appendix B (Pavement temperature prediction) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixB.pdf; Appendix C (Categorization of traffic loads) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixC.pdf; Appendix D (Cumulative axle load distribution as a function of tire footprint length) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixD.pdf; Appendix E (Determination of hourly traffic numbers) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixE.pdf; Appendix F (Artificial neural network models of stress intensity factors) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixF.pdf; Appendix G (Binder and mixture properties) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixG.pdf; Appendix H (Fracture properties of asphalt mixtures) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixH.pdf; Appendix I (Viscoelastic thermal stress computation) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixI.pdf; Appendix J (Collection of test sections and field performance data) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixJ.pdf; Appendix K (Reflection cracking amount and severity model) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixK.pdf; Appendix L (Calibration of the reflection cracking amount and severity model) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixL.pdf; Appendix M (Calibrated parameters of the reflection cracking amount and severity model) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixM.pdf; Appendix N (Calibration of the computational model to field data) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixN.pdf; Appendix O (User’s guide to the reflection cracking model) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixO.pdf; Appendix P (User’s guide to the computational model to field data calibration program) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixP.pdf; Appendix Q (Finite element program to calculate stress intensity factor) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixQ.pdf; Appendix R (Evaluation of available reflection cracking models) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixR.pdf; Appendix S (Sensitivity analysis of designing program) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixS.pdf; Appendix T (The comparison of field data and predicting results) at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_669AppendixT.pdf (Author/publisher)
Samenvatting