1. What is Cement Sand Ratio for Plastering?

The cement-sand ratio for plastering refers to the proportion of cement to sand used in the plaster mix. In Malaysia, common ratios are 1:4 (stronger mix) or 1:6 (standard mix), though local practices may vary.

2. How Does the Calculator Work?

The calculator uses simple ratio calculation:

Where:

• 1:4 ratio means 1 part cement to 4 parts sand
• 1:6 ratio means 1 part cement to 6 parts sand

Explanation: The ratio determines the strength and workability of the plaster mix.

3. Importance of Correct Ratio

Details: Using the correct ratio ensures proper adhesion, durability, and crack resistance of the plaster. Incorrect ratios can lead to weak plaster or excessive shrinkage.

4. Using the Calculator

Tips: Select your desired ratio (1:4 for stronger mix, 1:6 for standard mix) and enter the amount of cement you plan to use. The calculator will determine the required sand quantity.

5. Frequently Asked Questions (FAQ)

Q1: Which ratio should I use for plastering?
A: 1:4 is stronger but less workable, suitable for exterior walls. 1:6 is standard for most interior plastering in Malaysia.

Q2: Does this ratio include water?
A: No, water is added separately to achieve the desired consistency. Typically 20-25% of cement weight.

Q3: How much area does one bag of cement cover?
A: Approximately 12-15 sq.ft. for 12mm thickness with 1:6 ratio, but this varies based on application technique.

Q4: Should I adjust ratios for different sand types?
A: Yes, finer sand may require slightly less cement, while coarse sand may need more. Local practices in Malaysia may vary.

Q5: Is this ratio suitable for all plastering layers?
A: The base coat often uses 1:4, while the finishing coat may use 1:3 for smoother results.