1. What is a Type 1 Aggregate Calculator?

Definition: This calculator estimates the quantity of Type 1 aggregate needed for paving projects based on area, depth, and material density.

Purpose: It helps paving professionals and contractors determine how much Type 1 MOT aggregate is required for sub-base preparation.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Weight of Type 1 aggregate (tons)
• \( A \) — Area to be covered (square feet)
• \( D \) — Depth of aggregate layer (feet)
• \( \rho \) — Density of material (pounds per cubic foot, typically 120 for Type 1)

Explanation: The formula calculates volume then converts to weight, dividing by 2000 to convert pounds to tons.

3. Importance of Type 1 Aggregate Calculation

Details: Accurate calculation ensures proper sub-base thickness, structural support for paving, and cost-effective material purchasing.

4. Using the Calculator

Tips: Enter the area in square feet, depth in feet, and density (default 120 lb/ft³). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Type 1 aggregate?
A: Type 1 is a well-graded granular sub-base material (MOT Type 1) used as a load-bearing layer beneath pavements.

Q2: Why 120 lb/ft³ density?
A: This is the typical bulk density for crushed limestone Type 1 aggregate, but actual density may vary slightly.

Q3: How do I convert inches to feet for depth?
A: Divide inches by 12 (e.g., 6 inches = 0.5 feet).

Q4: Does this include compaction allowance?
A: The calculation provides loose material volume. Add 10-15% for compaction depending on material and equipment.

Q5: How does this differ from other aggregate calculators?
A: This specifically calculates for Type 1 MOT aggregate with typical paving densities and conversions.