Sampling the initial discharge or the few final tons from a bin or conveyor belt decreases chances of obtaining segregated material and should be encouraged.

Sampling the initial discharge or the few final tons from a bin or conveyor belt decreases chances of obtaining segregated material and should be encouraged.

• A. Not specified
• B. True
• C. False
• D. Always false

Answer: (B)

When sampling from a bin or conveyor, the goal is to get a sample that represents the entire batch, not just a portion that has segregated. Segregation in bulk material happens when different particle sizes separate during flow, producing zones that are coarser or finer than the average. Sampling the very start of discharge or the last few tons can help counter this effect because these portions are less affected by the progressive separation that occurs as material continues to flow. By including increments from the initial discharge and the final portion, you reduce the risk that the sample will be biased by the more segregated mid-stream material, improving representativeness. In practice, combine multiple increments across the discharge to further minimize bias and obtain a representative asphalt mix sample.

When sampling from a bin or conveyor, the goal is to get a sample that represents the entire batch, not just a portion that has segregated. Segregation in bulk material happens when different particle sizes separate during flow, producing zones that are coarser or finer than the average. Sampling the very start of discharge or the last few tons can help counter this effect because these portions are less affected by the progressive separation that occurs as material continues to flow. By including increments from the initial discharge and the final portion, you reduce the risk that the sample will be biased by the more segregated mid-stream material, improving representativeness. In practice, combine multiple increments across the discharge to further minimize bias and obtain a representative asphalt mix sample.