The San Vicente Dam in San Diego County was raised in height by 117 feet using roller compacted concrete. As a result, the dam can now store an additional 152,000 acre -feet of water, more than doubling the original capacity of the reservoir.
San Vicente Dam Raise Fact Sheet
Using Roller Compacted Concrete for Dams
Roller Compacted Concrete (RCC) is produced by mixing the same ingredients used to make conventional concrete including portland cement, fly ash, sand, aggregate, and water. However, the amount of water is significantly reduced resulting in a very stiff, “no-slump” concrete that is placed in a manner similar to asphalt paving. For dam construction, the RCC is transported in dump trucks and installed lift by lift in horizontal layers.
The versatility of cement allows for unreinforced gravity dams and durable pavements composed of RCC to be placed faster and more economically than conventional concrete. RCC can support the loads of rollers and other construction equipment immediately after placement. The compaction adds strength and durability. RCC dams are popular in California and Nevada.
Benefits of Using Roller Compacted Concrete for Dams
Saves time and money for pavements by providing much longer design life with reduced maintenance. RCC pavements can also be opened to traffic immediately after curing time or curing compound, striping and appropriate traffic-control has been established.
Allows for fast and economical construction of new dams and the raising of existing concrete dams by utilizing site aggregates and high production rates. RCC is also beneficial in seismic improvement of existing dams
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