The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

American Society for Testing and Materials

A review of mix design and evaluation research for permeable friction course mixtures

/pdf/simple-performance-test-for-superpave-mix-design-1wzg959d71.pdf

Simple Performance Test for Superpave Mix Design

Durability of porous or permeable friction courses (PFC) is an important aspect to address when designing this type of hot mix asphalt. At present, several agencies perform the mix design of PFC primarily by determining volumetric mixture properties. This approach ensures adequate mixture functionality, but it does not guarantee mixture durability. This paper evaluates the Cantabro loss test, the Hamburg Wheel-Tracking test (HWTT) and the Overlay test (OT) to determine the one most appropriate for mix design and laboratory performance evaluations. The Cantabro loss test, performed in both dry and wet conditions, is recommended for PFC mix design to corroborate the suitability of the optimum asphalt content defined based on volumetric determinations. The HWTT and the OT are not recommended, since the variability of the test results indicated that these tests may not be suitable for PFC mixtures.

Evaluation of durability tests for permeable friction course mixtures

Due to the recent strategic initiative adopted by the Ohio Department of Transportation (ODOT) to reduce highway crashes, there is a current need to determine if surface friction testing results can be correlated to wet weather crash data in Ohio. The establishment of such correlations would allot ODOT to develop a proactive wet-pavement accident reduction program that would effectively predict locations where wet-pavement crashes may likely occur. Under this study, research was conducted to determine if surface characteristic measurement can be correlated to wet-weather accidents and guidance was provided on the identification of desirable or target friction numbers as a function of site categories and friction demand. A comprehensive literature review was first conducted on pavement surface characteristics, including a review of international research activities. This was followed by a field testing program to evaluate smooth- and ribbed-tire surface friction, as well as pavement macrotexture and roughness, at 90 locations through the state. The 90 sections that were selected represent three site categories: signalized intersections, unsignalized intersections, and congested freeways. These site categories were considered to have the most potential to reduce rear-end crashes. The surface characteristics data from the 90 pavement sections were then analyzed with regards to crash data using both trend analysis and regression modeling techniques. Based on the finding from the field testing program and the available information in the literature, preliminary recommendations were developed for ODOT to consider in its quest for improving the safety of its roadway network. The main body of this report includes an abbreviated summary of the extensive literature search of both U.S. and international studies, a detailed description of the field testing program, a summary of data analysis procedures, a summary of the findings and conclusions, and a summary of the final recommendations for implementation.

Relationship between Skid Resistance Numbers Measured with Ribbed and Smooth Tire and Wet Accident Locations

The objective of this research project was to produce a synthesis of available information to support specific areas related to pavements for the safe, economical development of the Trans Texas Corridor (TTC). This synthesis is divided into several sections, each of which deals with a specific topic or topics. These specific areas include (1) pavement design for heavy vehicles, (2) pavement design for light vehicles, (3) skid resistance issues on high-speed corridors, (4) issues related to traffic characterization, (5) smart pavements for high-speed corridors, (6) pavement material response to dynamic loads and performance prediction, (7) safety issues related to splash and spray, and (8) ride quality for high-speed corridors. Regarding these stated issues, this synthesis recommends state-of-the-art technology to the Texas Department of Transportation (TxDOT) for use during development of the TTC. It provides recommendations for future research to fill gaps in knowledge and to take emerging technology to the stage where it can be implemented during the design and construction of the TTC pavements. This is the first synthesis study to address issues related to the TTC. A secondary objective of this project was to determine if additional synthesis studies in other areas of transportation related to the TTC should be conducted and, if so, how the process might be improved. This synthesis recommends that future syntheses should be more focused on specific, maybe critical issues; the researcher should be instructed to present only those findings that are really new, innovative, and potentially implementable. One element of the study should pursue non-transportation related technology that might be adapted to transportation issues.

/pdf/synthesis-of-pavement-issues-related-to-high-speed-corridors-4hxqqpss55.pdf

Synthesis of Pavement Issues Related to High-Speed Corridors

A mixture design procedure was developed for large stone mixtures with maximum aggregate sizes of 25 mm to 63 mm. The design procedure makes use of existing contractor stockpile gradations with the intent of maximizing the load carrying role of the stockpile containing the largest aggregate. Evaluative laboratory test procedures were developed and tested. A full scale test pavement demonstrated the effectiveness of the procedure.

Design and evaluation of large stone asphalt mixtures

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Synthesis of Pavement Issues Related to High-Speed Corridors

Design and evaluation of large stone asphalt mixtures