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Statistical Specifications

This is a three-part series appearing in HMAT magazine, discussing the background, current state, and future of statistical specifications for Hot Mix Asphalt. The advantages and weaknesses of statistical approaches to material specifications are presented along with an explanation of desirable features for specifications. 

Authors: David E. Newcomb, P.E., Ph.D., and Jon A.Epps, P.E., Ph.D.

pdf Article 1: Historical Background

pdf Article 2: Percent Within Limits specifications

pdf Article 3: Performance Related Specifications (PRS)

For questions on statistical specifications, please e-mail the engineering department.