TRB’s National Cooperative Highway Research Program (NCHRP) Report 704: A Performance-Related Specification for Hot-Mixed Asphalt provides a proposed performance-related specification (PRS) for hot-mix asphalt (HMA) in the form of the Microsoft Windows®-based Quality-Related Specification Software (QRSS).
The QRSS is a stand-alone program for Microsoft Windows (versions XP and 7) that employs a database of pre-solved solutions of the Mechanistic-Empirical Pavement Design Guide. The program is capable of (1) calculating the predicted rutting, fatigue cracking, and low-temperature (thermal) cracking of an HMA pavement from the mix volumetric and binder and aggregate properties of the as-designed HMA (typically the job mix formula) and (2) comparing them with predictions calculated from the contractor’s lot or sub-lot quality assurance data for the same properties.
The following are available for download:
• Microsoft Windows®-based Quality-Related Specification Software
• A Manual of Practice: HMA Quality Assurance Spreadsheet Program Using Measured Values of E* and D
• Program Installation Instructions
The following appendices to the report are available for download on the project website.
• APPENDIX A: Raw Data for Permanent Deformation Model Analysis
• APPENDIX B: Raw Data for Fatigue Cracking Model Analysis
• APPENDIX C: Summary of Results for Level 3 Creep Compliance Predictive Equations
• APPENDIX D: Hardening Ratio Database
• APPENDIX E: QRSS User’s Manual