Aggregate Testing

Methodology For Aggregate Impact Value (AIV) Test

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The Aggregate Impact Value (AIV) test, outlined in IS 2386 Part IV, evaluates the impact resistance of aggregates. This is performed with an impact testing apparatus, using a specific procedure and sample preparation method. Aggregates acceptable for wearing surfaces in concrete should not exceed a 45% impact value and for bituminous concrete, 30%. The process necessitates care in sample handling, test environment cleanliness, and adherence to standard guidelines.

Methodology for Aggregate Gradation Test

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The aggregate gradation test reveals the distribution of particle sizes in an aggregate sample. The test adheres to the standards of the Bureau of Indian Standards, notably IS 2386 (Part 1): 2016. It includes a sample, sieves, balances, and an oven. The test involves sieving, calculating percentages of particles, graphical representation, and reporting the data. It’s crucial to refer to updated standards for accurate procedures and requirements.