1. What is This Calculator For?

This calculator helps determine the amount of cement and sand needed for laying paving slabs. It uses standard industry formulas to provide accurate material estimates for your project.

2. How Does the Calculator Work?

The calculator uses these formulas:

Where:

• \( Area \) — Area to be paved in square meters
• \( Thickness \) — Bedding layer thickness in meters (typically 0.03m)
• \( ratio \) — Cement to sand mix ratio (e.g., 1:4)
• 1.33 — Compaction and wastage factor
• 1440 — Cement density in kg/m³
• 1600 — Sand density in kg/m³

3. Importance of Accurate Material Calculation

Details: Proper material calculation ensures you purchase the right quantities, avoiding project delays from shortages or unnecessary costs from over-purchasing.

4. Using the Calculator

Tips: Measure your area accurately in square meters. Typical thickness for paving slabs is 30mm (0.03m). Common mix ratios are 1:4 or 1:5 (cement:sand).

5. Frequently Asked Questions (FAQ)

Q1: What's the standard thickness for paving slab bedding?
A: Typically 30-50mm (0.03-0.05m), with 30mm being most common for residential applications.

Q2: What's the best cement:sand ratio for paving slabs?
A: 1:4 or 1:5 are most common. 1:4 provides stronger bedding while 1:5 is more economical.

Q3: Why include a 1.33 factor?
A: This accounts for compaction of materials and typical wastage during mixing and application.

Q4: Can I use this for other concrete work?
A: This is specifically designed for paving slab bedding. Other concrete work may require different calculations.

Q5: How should I adjust for irregular shapes?
A: Break the area into regular shapes (squares, rectangles) and calculate each separately, then sum the results.