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RCC Production Process

Roller-compacted concrete (RCC) gets its name from the heavy vibratory steel drum and rubber-tired rollers used to compact it into its final form. RCC has similar strength properties and consists of the same basic ingredients as conventional concrete—well-graded aggregates, cementitious materials, and water—but has different mixture proportions. The largest difference between RCC mixtures and conventional concrete mixtures is that RCC has a higher percentage of fine aggregates, which allows for tight packing and consolidation.

RCC pavements combine various aspects of conventional concrete pavement materials practices with some construction practices typical of asphalt pavements. However, while RCC pavements are compacted in the same manner and have similar aggregate gradation as asphalt pavements , the materials and structural performance properties of RCC are similar to those of conventional concrete pavement.

With well-graded aggregates, proper cement and water content, and dense compaction, RCC pavements can achieve strength properties equal to those of conventional concrete,  with very low permeability

RCC Mixing Plant

The production of RCC involves the following processes:

Materials procurement

Selection of the most appropriate and economical material  Materials inspection and establishing acceptance criteria

Materials storage

Storage of cementitious materials Proper storage of aggregates Temperature and dust control  Segregation and moisture control

Quality control and acceptance plan

Establishing quality control plan Source checking and inventory control  Periodic inspection of stored materials

Batching

Avoiding of segregation First in/first out Batching of different admixtures  Temperature maintenance strategies

Mixing

Selection of mixing plant capacity with respect to paving speed Quality, consistency, and uniformity of mixing  On-line quality monitoring

Materials and machinery quality control/quality assurance

Regular calibration of plant equipment Concrete quality testing before dispatch  Transportation equipment quality

Delivery

Quantity Production consistency  Speed

Transportation and throughput

Protecting concrete from excessive temperature rise and  against wind, planning for moisture losses, etc.

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