Roller compacted concrete

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Roller-Compacted Concrete (RCC) is a special blend of concrete that has the same ingredients as conventional concrete. It has cement, water, and aggregates, but RCC is much drier and essentially has no slump. RCC is placed similar to paving often by dump trucks or conveyors, spread by bulldozers, and compacted by vibratory rollers.

RCC is typically used for concrete pavement, but it has also been increasingly used to build concrete dams since the low cement content causes less heat to be generated while curing than typical for conventionally placed massive concrete pours. For dam applications, RCC sections are built lift-by-lift in successive horizontal layers so the downstream slope resembles a concrete staircase. Once a layer is placed, it can immediately support the earth-moving equipment to place the next layer. After RCC is deposited on the lift surface, small dozers typically spread it in one-foot-thick layers. ^[1]