Mix it Up

In 2019, TRB web series showcased how driving surface aggregate (DSA) specs and placement can improve unpaved roads over traditional aggregate use.

Researchers at NCAT prepared a standard for cold recycling mix design with foamed asphalt.

The technical committee of the Association of Modified Asphalt Producers conducted a reclaimed asphalt pavement (RAP) study. Here, we outline the results of the AMAP RAP study.

NCAT has completed Phase VI of its asphalt test track, covering information, statistics, and verifiable data on porous friction courses with cellulose fiber, with synthetic fiber, and with ground tire rubber.

Changes to the P-401 spec have placed more emphasis on two items: quality control (QC) and tack coat. Here’s how your P-401 responsibilities have changed.

Recent study examines VDOT’s revised grading specs for the design of SMA mixes with smaller aggregates and the impact of aggregate morphology on the structural stability of the mix.

Recent advances in laboratory polishing and friction testing now provide a better assessment of friction that considers the entire gradation in an asphalt mixture rather than a single aggregate source.

Blacklidge Emulsions looked at volumetrics and performance of plant-produced mixes with increasing RAP content and its rejuvenating product, ReGen.