A Performance-Related Specification for Hot-Mixed Asphalt

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 Instillation Instructions

The following appendixes 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

Software Disclaimer - This software is offered as is, without warranty or promise of support of any kind either expressed or implied. Under no circumstance will the National Academy of Sciences or the Transportation Research Board (collectively “TRB’) be liable for any loss or damage caused by the installation or operations of this product. TRB makes no representation or warrant of any kind, expressed or implied, in fact or in law, including without limitation, the warranty of merchantability or the warranty of fitness for a particular purpose, and shall not in any case be liable for any consequential or special damages.