1. What is Cement-Sand Ratio?

The cement-sand ratio refers to the proportion of cement to sand in a mortar or screed mix. It's a critical factor that determines the strength and workability of the mixture.

2. How to Choose the Right Ratio

Common ratios include:

• Mortar: 1:4 to 1:6 (general masonry work)
• Screed: 1:2 to 1:3 (floor leveling)
• Plaster: 1:3 to 1:4 (wall finishing)

Explanation: Higher sand content (1:6) makes weaker but more workable mortar, while richer mixes (1:2) are stronger but less workable.

3. Importance of Proper Mixing

Details: Correct ratios ensure adequate strength, durability, and workability. Improper ratios can lead to cracking, poor adhesion, or weak structures.

4. Using the Calculator

Tips: Select your application type (mortar or screed), choose recommended ratio, and enter cement quantity to calculate required sand amount.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mortar and screed?
A: Mortar binds building materials (bricks, blocks), while screed is a thin layer for leveling floors before final flooring.

Q2: Can I use the same ratio for all projects?
A: No, ratios vary by application. Structural work needs stronger mixes than non-load bearing walls.

Q3: How does water affect the ratio?
A: Water isn't included in the ratio but affects workability. Add gradually until desired consistency is achieved.

Q4: Should I account for wastage?
A: Yes, add 10-15% extra to your calculated amounts to account for mixing losses and spillage.

Q5: What about adding other materials?
A: Some mixes include lime or plasticizers. These require different ratios not covered by this basic calculator.