Products | Ad Mixtures | Roller
ROLLER-COMPACTED CONCRETE (RCC)
A concrete mix can only be classified as Self Compacting Concrete (SCC) if the same is able to flow under its own weight and completely fill the formwork, even in the presence of dense reinforcement, without the need of any vibration, whilst maintaining homogeneity. More technically, SCC should meet the requirements for filling ability, passing ability and segregation resistance, as mentioned in below table: Roller-Compacted Concrete (RCC) or rolled concrete (rollcrete) is a special blend of concrete that has essentially the same ingredients as conventional concrete but in different ratios, and increasingly with partial substitution of fly ash for Portland cement. The partial substitution of fly ash for Portland Cement is an important aspect of RCC dam construction because the heat generated by fly ash hydration is significantly less than the heat generated by Portland Cement hydration. This in turn reduces the thermal loads on the dam and reduces the potential for thermal cracking to occur. RCC is a mix of cement/fly ash, water, sand, aggregate and common additives, but contains much less water. The produced mix is drier and essentially has no slump. RCC is placed in a manner similar to paving; the material is delivered by dump trucks or conveyors, spread by small bulldozers or specially modified asphalt pavers, and then compacted by vibratory rollers
Some of the benefits of using Roller Compacted Concrete are:
- No need to use forms.
- Rebar is not required.
- It provides great strength.
- High Volume Placement.
- It can be used as a roadway after only 24 hours of being placed.
- Span soft localized subgrades.
- Will not be affected by oil spills, fuels and/or hydraulic fluids
The drier consistency and lack of adequate paste in RCC makes its fresh behaviour very different from other types of concretes. This also leads to challenges in characterizing its properties adequately to be translated to practice.
The workability of RCC is considered to be constituted by the cohesion, compatibility, and segregation resistance, retention of workability, water reduction and consistency. In association with FC-SETCON R (water- reducing and retarding admixture), FC-PLAST AEA (air entraining agent) offer distinct benefits and improves different properties of fresh RCC including changing the setting behaviour, cohesion, compatibility, consistency, water reduction, and finishibility.
- Reduced cement consumption
- Pipe cooling not required because of low temperature rise
- Extended workability during hot weather conditions
- Irrigation dam construction
- Hydroelectric stations Complies with IS 9103 -1999 and ASTM C 260
Covers approximately 55-60 Sft/20kg with 6mmx6mm square notched trowel
3 hours at 210C
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