Why is roller compacted concrete used?

Roller-compacted concrete (RCC) is a durable material increasingly used for parking lots and high-load applications. From intermodal yards to industrial flooring, RCC is already seen as an economical and durable solution. Rolling achieves desired densities and strength without reinforcement.

What is roller compacted concrete gravity dam?

Roller-compacted concrete (RCC) is a low-cost, fast method for concrete construction and repair. When working with dams, RCC can be used to repair damaged overflow structures, to protect embankment dams during overtopping, and to raise the crest of a dam.

What is meant by roller compacted concrete?

Roller-compacted concrete, or RCC, takes its name from the construction method used to build it. It’s placed with conventional or high-density asphalt paving equipment,then compacted with rollers. But unlike conventional concrete, it’s a drier mix—stiff enough to be compacted by vibratory rollers.

What are the disadvantages of roller compacted concrete?

Roller Compacted Concrete Disadvantages

• Smoothness is difficult to achieve.
• Revelling of Cracks.
• Skill person required.
• In roller compacted concrete dams, the drainage gallery often increases construction time and increases costs because the earth fill method being used does not easily accommodate such a construction.

In which of the following construction is roller compacted concrete technology used?

RCC can be used in many areas of construction like in dams, pavement construction etc. This paper highlights the applications and materials required in roller compacted concrete. Key Words: Innumerable, compressive, Aggregate, Consolidated, Compacted, Zero-Slump, Consistency, Segregation, Dowel bars.

Which of the following special concrete is used particularly for the construction of gravity dams and pavements?

Low Heat Cement Low heat cement suitable for mass concrete construction like gravity dams, as the low heat of hydration, prevents the cracking of concrete due to heat. This cement has increased power against sulphates and is less reactive and initial setting time is greater than OPC.

What increases concrete strength?

The compressive strength of concrete can be increased by: Including admixtures. Adjusting the cement type and quantity. Reducing the water/cement ratio.

How do you increase slump in concrete?

Adding just 1 gallon of water per cubic yard can: • Increase slump 1 inch • Decrease compressive strength 150 to 200 psi • Waste about 1⁄4 bag of cement • Increase shrinkage by 10% But water isn’t the only way to adjust slump. Consider adding a water reducer or superplasticizer at the site to increase slump.

Which concrete is used for dam construction?

The substructure part of the dam is poured using of hydrophobic cement & Portland Slag Cement; whereas the individual or combination of Portland blast furnace with OPC to gain the strength to the construction of the dam, retaining wall & other structures in the periphery.