Sources: Builder's Concrete & Supply Co., Inc., Fishers, Ind.; CP staff
Builder's Concrete capped a December 7 seminar, The Future of Pavement: Roller Compacted Concrete, by placing both light- and heavy-duty sections of RCC for truck and auto parking areas at its headquarters plant in Fishers, Ind., northeast of Indianapolis. The demonstration saw a tilting drum mixer load zero-slump RCC into dump trucks feeding the machines of seminar cosponsors, Calumet Civil Contractors, Whitestown, Ind., and Delello & Sons Asphalt Paving, Westfield, Ind.
Calumet placed the 8-in.-thick, heavy-duty portions with a mainline tracked high-density paver. It spreads dry RCC mixes and finishes the slab in a process similar to a concrete slipforming machine, substituting vibration with compaction. A finish roller was then applied to increase surface smoothness. Delello & Sons crews tackled the light-duty paving in two steps: placing mixes with a conventional asphalt paver, then finishing with two vibratory and two static drum roller passes. The exercise yielded 13,200 sq. ft. of service-ready RCC pavement on a gloomy day, whose freezing temperatures sustained limited evidence of the season's first snowfall--and idled central Indiana's asphalt plants.
The demonstration followed a four-hour seminar and panel discussion, hosted by Builder's Sales Manager Scott Noel and Quality Control Manager Scott Hall at a nearby conference venue. The event drew about 150 transportation agency, design and construction professionals from across Indiana; in the face of escalating petroleum-based binder prices, many have observed or helped advance development of RCC pavement as an alternative to asphalt base layers or full depth sections.