Aggregate Storage Operations are operations that must address.

• A. Segregation, degradation, and contamination
• B. Moisture content
• C. Color variation
• D. Paving schedule

Answer: (A)

Aggregate storage operations focus on maintaining the quality of material in stockpiles and during handling. The three key issues that must be addressed are segregation, degradation, and contamination.

Segregation happens when different particle sizes separate when the material is dumped, moved, or stored, leading to piles that aren’t uniform. This creates a mix with inconsistent gradation, which can cause weak points in the asphalt and uneven compaction.

Degradation refers to the physical breakdown of aggregate from weathering and handling. As aggregates abrade or weather, fines can increase, changing the gradation and making the material more prone to moisture-related problems and less workably graded for the mix.

Contamination is the intrusion of unwanted materials such as clay, silt, organic matter, or debris. Contaminants alter the performance by weakening binder adhesion, increasing moisture susceptibility, and changing the effective gradation.

To manage these, storage practices emphasize proper stockpile design and handling to keep blends uniform, turnover to minimize aging, protection from harsh weather or wind, and routine quality checks.

Moisture content is indeed important for how the aggregate behaves in the mix, but it is typically controlled and adjusted during plant operations rather than being the primary focus of storage quality, color variation is cosmetic and does not affect performance, and the paving schedule is about sequencing and timing rather than the stored material’s integrity.