How do you calculate the tolerance for the asphalt spread rate target?

Calculating the tolerance for the asphalt spread rate target involves understanding how to define an acceptable range for the application rates being used. By multiplying the target spread rate by 0.05, you're determining a 5% tolerance level, which is a standard method to ensure that the application of asphalt remains within an acceptable range for quality control. This percentage serves as a guideline to accommodate minor variations in application due to factors like equipment performance, weather, or operator adjustments.

This method ensures that the application remains consistent and effective without exceeding or falling below the target rate significantly, which is crucial for maintaining the integrity of the pavement structure. Consequently, using a 5% tolerance reflects common industry practices, promoting that the actual spread rate remains within 95% to 105% of the target figure.

In contrast, options that suggest a different percentage or static adjustments like adding or subtracting 10% do not align with the standard practices used for tolerance calculation. These might lead to an unacceptably wide or narrow application range that can negatively impact the quality and performance of the asphalt pavement.