Do-it-(mostly)yourself RCC paving

摘要

In January, Illinois became the latest state DOT to adopt a paving specification for roller-compacted concrete (RCC), a very dry concrete mix with 3/4-inch aggregate that's delivered by dump trucks, placed with an asphalt paver, and compacted with a vibratory roller. Because of its high density and low water content, the material achieves high strength more quickly than conventional concrete pavement mixes. RCC is often topped with a thin layer of asphalt. The result is a pavement that's more durable than full-depth asphalt with a stone base course and easier for self-performing municipalities to finish and repair than conventional concrete pavement.