What is a primary reason for calculating HMA placement yield?

Calculating Hot Mix Asphalt (HMA) placement yield is crucial for several reasons, one of which is to ensure that the mixture is placed at the correct cross-slope and grade. This measurement allows contractors to confirm that the asphalt is being applied according to specified design parameters, which are vital for proper drainage and structural integrity of the pavement.

When the yield is calculated, it provides insight into how much material is needed to cover a specified area adequately. This directly influences how adjustments can be made to meet the required cross-slope for drainage and the grade for functional usage. Accurate placement ensures that the pavement maintains its desired performance characteristics over time.

While determining final cost of materials, assuring uniform texture, and monitoring equipment efficiency are important aspects of asphalt paving, they do not directly relate to the immediate need for ensuring the correct cross-slope and grade during placement. The primary goal in the context of yield calculation is to maintain the specified geometry of the pavement to support its long-term effectiveness.