Porous Friction Course (PFC) mixtures are designed with an open aggregate structure to yield high inplace air voids (i.e., typically between 15 and 20 percent). This allows rainwater to drain horizontally through the layer toward the edge of the pavement structure, thereby improving pavement surface friction.
The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 305: Validation of a Performance-Based Mix Design Method for Porous Friction Courses is designed to assist state highway agencies in implementing the proposed performance-based mix design procedure, verify if the thresholds proposed in the procedure could be achieved, and refine the procedure if needed.
Table of Contents
|Chapter 1. Introduction||1-2|
|Chapter 2. State of Practice||3-9|
|Chapter 3. Experimental Design||10-14|
|Chapter 4. Results and Analysis||15-22|
|Chapter 5. Conclusions||23-24|
|Appendix A. Detailed Test Results||26-27|
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