Shed Base Concrete Mix Calculator Sand Gravel Cement

Concrete Mix Formulas:

\[ \text{Cement (kg)} = \left[\text{Volume (m³)} \times 1.54 \times \left(\frac{1}{\text{sum ratio}}\right)\right] \times 1440 \] \[ \text{Sand (m³)} = \text{Volume} \times 1.54 \times \left(\frac{\text{sand ratio}}{\text{sum ratio}}\right) \] \[ \text{Gravel (m³)} = \text{Volume} \times 1.54 \times \left(\frac{\text{gravel ratio}}{\text{sum ratio}}\right) \]

Cement Required:

Sand Required:

Gravel Required:

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1. What is the Shed Base Concrete Mix Calculator?

This calculator helps determine the exact amounts of cement, sand, and gravel needed for a shed base concrete mix based on the volume required and your chosen mix ratios.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

1.54 — Conversion factor for dry volume to wet volume
1440 — Density of cement (kg/m³)
Volume — Total concrete volume needed (m³)
Ratios — Your chosen mix proportions

3. Importance of Proper Concrete Mix

Details: A proper concrete mix is crucial for shed base durability. Too much water weakens the mix, while improper ratios can lead to cracking or insufficient strength.

4. Using the Calculator

Tips: Measure your shed base area accurately. Common mix ratios are 1:2:3 or 1:3:5 (cement:sand:gravel). Enter all values as positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical mix ratio for shed bases?
A: 1:2:3 (cement:sand:gravel) is common for small sheds, while 1:3:5 may be used for larger sheds.

Q2: How do I calculate the volume needed?
A: Volume = Length × Width × Depth (all in meters). Add 10% extra for safety.

Q3: Why the 1.54 multiplication factor?
A: It accounts for the increase in volume when mixing dry ingredients with water (bulking factor).

Q4: Can I use this for other concrete projects?
A: Yes, the calculator works for any concrete mix, but adjust ratios based on required strength.

Q5: How thick should my shed base be?
A: Typically 100mm (4 inches) for small sheds, up to 150mm (6 inches) for larger/heavier sheds.