Who determines the size of the HMA lot?

• A. The QC technician daily.
• B. The production manager weekly.
• C. The site supervisor monthly.
• D. The quality assurance team quarterly.

Answer: (A)

The size of the Hot Mix Asphalt (HMA) lot is determined daily by the Quality Control (QC) technician. This frequency is necessary because the quality and properties of the HMA can vary from day to day based on several factors, including materials, environmental conditions, and production methods.

By assessing the lot size daily, the QC technician is able to implement immediate quality control measures, ensuring that the asphalt mix meets the specified standards for that particular day's production. This proactive approach allows for timely adjustments or interventions, thereby maintaining the overall quality of the paving work. The QC technician's role is critical in establishing consistent quality within each lot, which is key for successful project outcomes.

Other approaches to determining lot sizes on a less frequent basis may not adequately address the daily variability and could potentially lead to issues with the pavement's performance.