What should be calculated to adjust the application rate of tack?

Calculating the temperature correction factor is essential for adjusting the application rate of tack because temperature significantly influences the viscosity and behavior of asphalt materials. When temperatures are higher, asphalt tends to be less viscous, which can affect how it spreads and adheres to surfaces. Conversely, at lower temperatures, the material can be more viscous and may require a different application rate to ensure proper bonding.

By applying a temperature correction factor, you can ensure that the tack coat is applied at an optimal rate that will promote effective bonding between layers, which is critical for the overall performance and longevity of the asphalt pavement. This consideration helps in maintaining the performance standards of the paving process, especially under varying temperature conditions.

Other factors such as the size of the aggregate, humidity level, and curing time also play roles in pavement performance but do not have as direct an impact on the adjustment of tack application rates as temperature does. These factors might influence the overall paving process, yet the immediate concern of regulating tack application is primarily linked to temperature changes.