Paving with RCC

by Oswin Keifer, Jr., Materials and Paving Engineer; U.S. Army Corps of Engineers, Portland, OR,


Serial Information: Civil Engineering—ASCE, 1987, Vol. 57, Issue 10, Pg. 65-68


Document Type: Feature article

Abstract:

Roller compacted concrete pavement differs from the RCC used for dams. Since 1984, when the first full scale RCC pavement in the U.S. was installed by the Corps of Engineers at Ft. Hood, Tex., there have been many military and civilian applications. Costs are generally 20 to 25% less than comparable portland cement concrete or asphalt pavements. Typically, flyash is used to replace 20-30% of the portland cement by volume, aggregates are 3/4 in. maximum, and continuous type plants are used for mixing. The newest American-made RCC paving machines are equipped with tamping as well as vibrating screeds, and compaction is done with heavy steel wheel vibratory rollers. Compaction of all joints is critical, as is keeping the pavement from drying out at any time before curing is complete. So far, service records are not long enough to document durability, but in British Columbia, pavements as old as 10 years show no evidence of freeze-thaw deterioration.

Subject Headings: Concrete pavements | Pavements | Vibration | Roller-compacted concrete | Portland cement | Concrete dams | Asphalt pavements

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