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Sand Calculator for Concrete Base

Sand Calculator for Concrete Base


Mix ratio: (Cement:Sand:Gravel)

Length < A

Width < B

Note: 1 Bag of cement = 0.035 m3. 1 Cement bag contains = 50 kg cement

Concrete Base Pouring Precautions


Preparation Before Pouring

  • Check the stability of formwork and supports, especially for cantilever members.
  • Clean the formwork and wet it without ponding.
  • Inspect the reinforcement for specifications, quantity, position, and binding.

Pouring Process Precautions

  • Pour concrete before it sets initially. Re-mix if necessary.
  • Control the concrete mix ratio strictly.
  • Limit the free-fall height of concrete to prevent segregation.
  • Vibrate evenly to ensure compactness without damaging reinforcement.
  • Handle construction joints properly if pouring cannot be continuous.
  • Monitor safety during pouring.

Post-Pouring Care

  • Cover and moisturize the concrete within 12 hours.
  • Water the concrete for the required curing period.
  • Avoid walking on or installing forms and supports until the concrete reaches sufficient strength.
  • Regularly test concrete strength.

Calculate Steps


Step 1: Cement Concrete Volume
Formula: Length × Width × Height


Step 2: Wet Volume of Mix
Formula: Cement Concrete Volume × 1.524


Step 3: Amount of Cement Required
Formula: (Cement Ratio / Total Ratio) × Wet Volume of Mix


Step 4: No. of Cement Bags
Formula: Amount of Cement Required / 0.035


Step 5: Amount of Sand Required
Formula: (Sand Ratio / Total Ratio) × Wet Volume of Mix


Step 6: Sand in Kg
Formula: Amount of Sand Required × 1550


Step 7: Amount of Gravel Required
Formula: (Gravel Ratio / Total Ratio) × Wet Volume of Mix


Step 8: Gravel in tons
Formula: Amount of Gravel Required × 1.3 × Gravel Size



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