Principal items of work in the project include: 7,500 CY Excavation, Unclassified, 21,000 SY Dense-Graded Aggregate
Base Course, 4" Thick, 2,000 TON Hot Mix Asphalt 9.
NYCDOT had some familiarity with microsurfacing, a mixture of dense-graded aggregate
, asphalt emulsion, water, and mineral fillers, that could be installed at 3/4-in.
Laboratory investigations determined that the optimum mix was a composite of 84-percent dense-graded aggregate
, 11-percent ponded fly ash, and 5-percent hydrated lime.