What is the primary purpose of the proper stockpiling method?

• A. To maximize speed
• B. To avoid contamination, keep well-drained, and maintain uniform gradation.
• C. To minimize cost
• D. To increase moisture content

Answer: (B)

Stockpiling is about preserving the quality of the aggregate so the asphalt mix performs consistently. The primary purpose is to prevent contamination from dust, fines, or other materials, keep the pile well-drained to avoid moisture problems, and maintain uniform gradation so the material loaded into the plant represents the intended particle-size distribution. Contamination or moisture changes can alter gradation and binder performance, leading to weak spots and inconsistent mixes. A properly managed stockpile minimizes these issues, ensuring reliable, uniform results. We wouldn’t aim to maximize speed, reduce quality to save costs, or increase moisture content, since those outcomes would undermine the material’s performance in the pavement.