The latest Small Starts study from the National Institute for Transportation and Communities (NITC) offers sustainable road building materials for rural infrastructure, from an unlikely source.
Approximately 7,000 years ago, the eruption of Oregon's Mt. Mazama blanketed the Klamath Basin region with a thick layer of volcanic ash. Matthew Sleep, an associate professor of civil engineering at Oregon Tech, investigated the use of this ash as a natural pozzolan for soil stabilization and unpaved roadway improvement. He found that the ash, prevalent in Southern Oregon, has the potential to be used for gravel roadway dust abatement.
Portland cement, the current industry standard, is a basic ingredient in concrete and mortar. A caustic material that causes chemical burns, it was first developed in the 19th century. It’s time for a new approach.
A sustainability analysis concluded that replacing...