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Charles Darwin wrote, " It is not the strongest of the species that survive, not the most intelligent, but the most responsive to change." Our industry now finds itself forced to face changes and be responsive to it. The alternative may be to be left behind.
The growth of reclaimed and recycled materials continues to grow. But RAP, RAS, RCA and GTR come from a variety of sources, and that means they meet by physio-chemically characterized before they can be added to mixes. The sixth story in our seven-part series, The Chemistry of Road Building Materials.
Open-graded friction courses may not be for everyone but with attributes such as less spray & less noise, they are gaining acceptance & bringing another option to the table for some road sections