In the development of a quality assurance program, a state highway agency (SHA) incorporates policies and procedures for assessing how well the materials and construction used by a contractor on a construction project satisfy the agency's specifications.
The TRB National Cooperative Highway Research Program's NCHRP Research Report 946: Procedures and Guidelines for Validating Contractor Test Data reviews and evaluates the procedures and practices used in the acceptance of construction materials. The report also proposes a related practice for incorporation into AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing.
Supplemental files to the report include Appendices A through E, available as a single PDF file, a State Highway Agency Survey (Appendix A), Survey Responses (Appendix B), Numerical Simulations (Appendix C), State Highway Agency Date Analysis (Appendix D), and Statistical Tables (Appendix E).
Table of Contents
|Part I - Research Overview||3-4|
|Chapter 1 - Background||5-6|
|Chapter 2 - Research Approach||7-26|
|Chapter 3 - Findings and Applications||27-48|
|Chapter 4 - Summary and Recommendations for Future Research||49-50|
|Abbreviations and Symbols||54-54|
|Appendices A E||55-56|
|Part II - Proposed Practice for Validating Contractor Test Data||57-58|
|Section 1 - Scope||59-59|
|Section 2 - Referenced Documents||60-59|
|Section 3 - Terminology||60-64|
|Section 4 - Procedures and Guidelines for Validating Contractor Test Data||65-72|
|Annex A - Recommended Sampling Plans||73-84|
|Annex B - Procedure for Determining Statistical Outliers||85-88|
|Annex C - Statistical Tables||89-96|
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