Roller Compacted Concrete (RCC) is a relatively stiff, zero-slump concrete mixture with the consistency of damp gravel and compressive strengths greater than 4,000 psi. RCC can be made using local materials, aggregates or crushed recycled concrete, Portland cement and/or fly ash, and water. A mixing plant capable of the dry and stiff end product is a necessity. Some refer to these mixing plants as pugmills. The mixture is placed and roller compacted with the same commonly available equipment used for asphalt pavement construction. The process requires no forms, finishing, surface texturing, steel reinforcement, joint sawing or sealing. However, saw-cut joints can be easily created to offer an enhanced appearance and to help control cracking. RCC successfully and economically combines strength and durability with ease of construction.
RCC takes its name from the method used to build it in the use of vibratory drum rollers for compaction.
RAPID’s twin-shaft Continuous Mixing Plant (Pugmill) will evenly disperse the relatively small amounts of water and cement together with aggregates to create a stiff dry mix resembling damp gravel.
Dump trucks transport the Roller Compacted Concrete from the plant to the conventional or high-density asphalt pavers.
The Roller Compacted Concrete is placed in layers, sometimes referred to as lifts, 4-9 inches thick.
Steel drum vibratory rollers compact the concrete.
Rapidmix Continuous Mixing Plant - Volumetric or Continuous Weigh?
Our clients have confidence the Rapidmix line is key to ensuring their Roller Compacted Concrete (RCC) projects are carried out on time and within budget. Rapidmix provides the twin-shaft continuous mixing efficiency needed to evenly disperse the relatively small amount of water used in the mixing of RCC. Once mixed, dump trucks transport the RCC and discharge it into a paving plant, which places the material in layers typically up to 10 inches (250 mm) thick and 42 feet (13m) wide. Ports choose RCC pavement, like Port of Long Beach, where they find Roller Compacted Concrete preferable; due to its superb strength, sustainability, low-maintenance, and cost-effective benefits. It is capable of standing up to massive loads and specialized equipment like tanks on the Fort Carson Military Base in Co.
Continuous mixing—When the output of the mixer is equivalent to the input of materials and the mixer can be operated without interruption to charge or discharge material. Rapid offers 2 types of continuous mixing plants:
Volumetric measurement (C)—When the ingredients of concrete are flowing continuously and measured by volume, by using a calibrated rotary opening, a calibrated fixed-gate opening, or a combination of these, so that a known, predetermined volume of each ingredient is obtained in a designated time interval, the method of measurement is volumetric. Continuous volumetric measurement with multiple ingredients requires that the proper relationship among those ingredients be maintained. It is this calibration of speed and volume which provides a smooth continuous release of materials resulting in your next homogeneous mix. See our Volumetric Rapidmix plants: 400C or 600C.
Continuous Weigh (CW)- Materials are continuously weighed from the aggregate hopper via load cells which weighs the material from the hopper to the mixing chamber. On route, the material from the silo, is collected in weigh hoppers where the silo material is then dispensed into the mixing chamber for an accurately weighed and mixed final product. You may review our Rapidmix Continuous weigh plants: 400CW or 600CW.
Both types of plants will mix your materials, this determination may be defined by the source of work or an engineer. Please contact us if you have any additional questions.
The RCC Pavement Council is an excellent resource to find qualified RCC Contractors, equipment, materials, and construction best practices expertise as well as resources and support to the design community. The Council collaborates closely with industry promotion and research partners including the American Concrete Pavement Association, the Portland Cement Association, and the National Ready Mixed Concrete Association. See Videos of Roller Compacted Concrete Pavement or click videos below to learn more about the Roller-Compacted Concrete Pavement Council.