What is the first action if a tack distributor does not have a calibration chart?

The appropriate first action when a tack distributor does not have a calibration chart is to refrain from using it to distribute tack. This is crucial because an uncalibrated distributor may not apply the tack coat at the correct rate, leading to insufficient bonding between layers or excess tack that could cause issues with the pavement structure. Proper calibration ensures that the material is dispensed evenly and at the right quantity, which is essential in maintaining the integrity of the pavement.

In the absence of a calibration chart, proceeding to use the distributor could result in improper application, compromising the quality of the paving job and potentially requiring rework or repairs. Prioritizing accurate calibration helps ensure that all paving operations meet the required specifications and standards for quality and performance. It is important to verify the calibration before any production work begins to maintain compliance and safety within the project.