M20 Sand Aggregate Ratio Calculator

Standard M20 Concrete Ratio:

\[ Ratio = 1 : 1.5 : 3 \text{ (cement : sand : aggregate)} \]

Sand Quantity:

Aggregate Quantity:

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1. What is M20 Concrete Ratio?

The M20 concrete mix ratio is a standard proportion of cement, sand, and aggregate used in construction. The ratio 1:1.5:3 means 1 part cement, 1.5 parts sand, and 3 parts aggregate by volume or weight.

2. How Does the Calculator Work?

The calculator uses the standard M20 ratio formula:

\[ \text{Sand} = \text{Cement} \times 1.5 \] \[ \text{Aggregate} = \text{Cement} \times 3 \]

Where:

1 — Cement proportion
1.5 — Sand proportion multiplier
3 — Aggregate proportion multiplier

Explanation: The calculator takes your cement quantity and automatically calculates the required sand and aggregate quantities maintaining the standard M20 ratio.

3. Importance of Correct Ratios

Details: Maintaining proper ratios is crucial for concrete strength, durability, and workability. Incorrect ratios can lead to weak structures or excessive material costs.

4. Using the Calculator

Tips: Enter cement quantity in kg/m³. The calculator will provide the corresponding sand and aggregate quantities needed for M20 grade concrete.

5. Frequently Asked Questions (FAQ)

Q1: What does M20 stand for?
A: M20 refers to the compressive strength of concrete - 20 MPa at 28 days of curing.

Q2: Is this ratio by volume or weight?
A: The ratio can be used for both volume and weight calculations, though weight measurements are more precise.

Q3: Can I use this ratio for other concrete grades?
A: No, different concrete grades (M15, M25, etc.) have different standard ratios.

Q4: Does this account for water-cement ratio?
A: No, this calculator only handles the dry components. Water-cement ratio (typically 0.4-0.6) should be calculated separately.

Q5: What if I need to calculate for a different volume?
A: First calculate quantities per m³, then multiply by your required volume in cubic meters.