1. What is Density of Granular Sub-Base (GSB)?

Definition: This calculator computes the density of Granular Sub-Base material using mass and volume measurements.

Purpose: It helps civil engineers and construction professionals determine the compactness and quality of GSB material.

2. How Does the Calculator Work?

The calculator uses the fundamental density formula:

Where:

• \( \rho \) — Density (kg/m³)
• \( m \) — Mass (kg)
• \( V \) — Volume (m³)

Explanation: The mass of GSB material is divided by its volume to obtain density.

3. Importance of GSB Density

Details: Proper density measurement ensures the GSB layer provides adequate strength and drainage for pavement structures.

Typical density range for GSB: ~1900–2100 kg/m³

4. Using the Calculator

Tips: Enter the mass of GSB material in kilograms and its volume in cubic meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Granular Sub-Base (GSB)?
A: GSB is a layer of granular material used beneath pavements to provide structural support and drainage.

Q2: Why measure GSB density?
A: Density indicates compaction quality which affects load-bearing capacity and long-term performance.

Q3: How is mass typically measured?
A: Using calibrated scales or weighing equipment at construction sites or laboratories.

Q4: How is volume typically measured?
A: Using water displacement methods or by calculating from dimensions for regular shapes.

Q5: What affects GSB density?
A: Particle size distribution, moisture content, and compaction effort significantly affect density.