From the Segregation Checklist for Prevention, which practice is recommended?

• A. Compact the mix immediately
• B. Construct in layers
• C. Increase aggregate size
• D. Delay paving until next day

Answer: (B)

To prevent segregation, place the asphalt in thin lifts and compact each lift before the next is added. Constructing in layers keeps the mix thinner and more uniform, so the coarse and fine aggregates stay evenly mixed as compaction occurs. This approach helps manage temperature and compaction forces across the cross-section, reducing the tendency of large particles to settle and fines to migrate. Starting to compact immediately can disrupt uniform distribution and trap segregation; increasing aggregate size makes segregation more likely; delaying paving until the next day introduces moisture and temperature changes that undermine bonding and consistency.