Sand Cement Calculator For Patio Pavers

Material Calculation Formulas:

\[ \text{Cement (kg)} = \left[\text{Area (m²)} \times \text{Thickness (m)} \times 1.33 \times \left(\frac{1}{1 + \text{ratio}}\right)\right] \times 1440 \] \[ \text{Sand (kg)} = \left[\text{Area (m²)} \times \text{Thickness (m)} \times 1.33 \times \left(\frac{\text{ratio}}{1 + \text{ratio}}\right)\right] \times 1600 \]

Cement Required:

Sand Required:

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1. What is This Calculator For?

This calculator helps determine the amount of cement and sand needed for patio paver bedding mortar. It's essential for proper installation and longevity of your paved surfaces.

2. How Does the Calculator Work?

The calculator uses these formulas:

\[ \text{Cement (kg)} = \left[\text{Area} \times \text{Thickness} \times 1.33 \times \left(\frac{1}{1 + \text{ratio}}\right)\right] \times 1440 \] \[ \text{Sand (kg)} = \left[\text{Area} \times \text{Thickness} \times 1.33 \times \left(\frac{\text{ratio}}{1 + \text{ratio}}\right)\right] \times 1600 \]

Where:

Area — Surface area to be paved (m²)
Thickness — Bedding layer thickness (typically 0.03m or 30mm)
Ratio — Cement to sand ratio (e.g., 1:4)
1.33 — Compaction factor
1440 — Cement density (kg/m³)
1600 — Sand density (kg/m³)

3. Importance of Proper Bedding Mortar

Details: The bedding mortar provides a stable base for pavers, ensures proper drainage, and prevents shifting or settling over time. Using the correct mix ratio is crucial for durability.

4. Using the Calculator

Tips: Measure your area accurately in square meters. Typical thickness is 0.03m (30mm). Common ratios are 1:3 to 1:5 (cement:sand). Always add a little extra (5-10%) for waste.

5. Frequently Asked Questions (FAQ)

Q1: What's the typical thickness for bedding mortar?
A: For most patio applications, 25-40mm (0.025-0.04m) is standard, with 30mm being most common.

Q2: What ratio should I use?
A: For general patio use, 1:4 (cement:sand) is common. For heavier traffic areas, 1:3 provides more strength.

Q3: Can I use this for other projects?
A: This is specifically designed for bedding mortar under pavers. Other applications may require different calculations.

Q4: Why the compaction factor?
A: The 1.33 factor accounts for the compaction needed to achieve the desired thickness after settling.

Q5: How do I convert kg to bags?
A: Standard cement bags are typically 25kg or 50kg. Divide the cement result by the bag size to determine how many bags to purchase.