The size and nature of the project will dictate which production method to use.
Roller-compacted concrete (RCC) can be produced in any type of equipment that will provide uniform mixing of the cement, aggregates, and water.
Transit mixers. While transit mixers can produce a quality product and make more local RCC available, their slower mixing and discharge times are tailored for smaller scale production. Because RCC is very dry, using fluidizing admixtures is recommended when mixing or hauling in transit mixers.
- Tilt drum mixers. By far the most common central mixing unit, tilt drum mixers are available regionally and are capable of fast, quality-consistent production, which makes them suitable for most RCC projects.
- Mobile truck mixers. Versatility and speed are advantages of mobile truck mixers since all components—aggregates, cement, and water—are stored in separate compartments on the truck.
- Horizontal shaft mixers. Whether single-shaft or dual-shaft, continuous flow (as in a pugmill) or compulsory batch, horizontal shaft mixers provide the most intense and fastest mixing action, making them a good choice for larger and more production-oriented projects.
Regardless of how the RCC is mixed and batched, dump trucks typically transport the mix to the jobsite where it is placed using asphalt-type paving equipment, compacted with large vibratory rollers, and cured. The result is a strong, durable, and economical pavement.