Using measurements in feet:

Area of the Circle (ft²):
\( \text{Area} = \pi \times \left( \frac{\text{Diameter}}{2} \right)^2 \)

Volume in Cubic Feet (ft³):
\( \text{Volume}_{ft^3} = \text{Height} \times \text{Area} \)

Volume in Cubic Yards (yd³):
\( \text{Volume}_{yd^3} = \frac{\text{Volume}_{ft^3}}{27} \)

Volume in Cubic Meters (m³):
\( \text{Volume}_{m^3} = \text{Volume}_{ft^3} \times 0.0283 \)

Value of Pi (\( \pi \)): \( 3.14 \)

Pre-pouring Preparations

• Ground Bearing Capacity: Ensure the ground where the cylinders will be poured has sufficient bearing capacity to prevent sinking or tilting.
• Formwork Inspection: Verify the formwork dimensions against the required cylinder dimensions and ensure material specifications meet design requirements.
• Formwork Preparation: Apply release agent evenly to the formwork to facilitate removal after pouring.
• Reinforcement Acceptance and Fixation: Inspect reinforcement for quality and fix reinforcement cages to ensure accurate positioning and stability.

Pouring Process

• Base Preparation: Wet the base before pouring and fill with 5-10 cm of 1:2 cement mortar to enhance density and prevent honeycombing.
• Layered Pouring: Pour concrete in layers not exceeding 50 cm in thickness, especially for taller cylinders.
• Vibration Technique: Use an immersion vibrator to vibrate the concrete evenly and fully, avoiding touching the reinforcement.
• Free Fall Height: Ensure the free fall height of concrete from the chute does not exceed 2 meters; use a chute extension if necessary.
• Pouring Height: For vertical structures exceeding 3 meters in height, use a chute, tremie, chute with side openings, or other suitable method.

Post-pouring Care

• Watering and Curing: Start watering the concrete surface after initial setting (usually 2-4 hours), maintaining it wet for at least 7 days, depending on climate and concrete type.
• Environmental Adaptation Strategies: Adjust watering frequency and methods based on temperature, wind speed, and other environmental conditions.

Additional Considerations

• Safety Precautions: Ensure the safety of personnel during pouring operations by wearing necessary protective equipment.
• Quality Control: Strictly control the quality of concrete, including mix proportions, pouring uniformity, and vibration.
• Construction Records: Keep detailed records of pouring data, such as pouring time, height, and vibration frequency, for quality control and troubleshooting.