ToolsMining & QuarryingAggregate Processing

Aggregate Impact Value Calculator

Calculate AIV from original mass and fines produced per BS 812-112. Classifies aggregate toughness for road construction.

Last updated 28 July 2026

About this tool

Calculate Aggregate Impact Value from original specimen mass and mass of fines produced after 15 blows of the standard impact hammer per BS 812-112. Results are classified from exceptionally strong (≤10%) to very weak (>35%).

How to use this tool

Enter original mass and mass passing 2.36mm after test

Technical information

AIV (%) = (fines mass / original mass) × 100

Limitations

BS 812-112 has been superseded by BS EN 1097-2. AIV remains widely used in UK practice.

Revision history

28 July 2026: Initial release

Disclaimer

This tool is provided for educational and general information purposes only. It is not a substitute for professional engineering advice, design or verification.

Diggy and its contributors are not licensed engineering consultants and no results generated by this tool should be used directly for construction, design or safety-critical decisions.

All values and outputs are based on published empirical correlations and should be independently checked and confirmed by a qualified geotechnical engineer before use.

By using this tool, you accept full responsibility for how you interpret and apply the information provided.

Spotted an error? Let us know.

Original specimen mass (g)

Mass passing 2.36mm after test (g)

Related tools

Aggregate Crushing Value CalculatorCalculate ACV from original mass and fines produced per BS 812-110. Classifies aggregate strength for pavement design.Blast Fragmentation CalculatorPredict blast fragmentation using the Kuz-Ram model. Calculate X50 mean fragment size, X80, X20, and powder factor from blast design parameters.Crusher Run CalculatorCalculate crusher run (Type 1 sub-base) quantities from area and depth. Includes weight, order quantity with waste, and lorry load estimates.Roll Crusher Capacity CalculatorEstimate roll crusher throughput from roll dimensions, gap, speed, and fill factor. Supports smooth and corrugated rolls.Silo Capacity CalculatorCalculate silo storage volume and material capacity from cylinder and hopper cone dimensions with bulk density.Slake Durability Index CalculatorCalculate slake durability index (Id1, Id2) from mass loss over two wetting-drying cycles per ISRM / ASTM D4644. Includes durability classification.