What is the allowed tolerance for tack application, measured in gallons per square yard?

The allowed tolerance for tack application, measured in gallons per square yard, is a critical component of asphalt paving because it ensures the proper adhesion of the asphalt layers. The specified tolerance is set to maintain the quality of the pavement and to ensure that the tack coat is neither over-applied nor under-applied.

In this case, the tolerance of plus or minus 0.01 gallons per square yard is very precise and reflects the need for accuracy in the application of tack. This tight tolerance helps to prevent problems such as slippage or inadequate bonding between layers, which can lead to premature failures in the pavement structure. It is particularly important to closely control the amount of tack applied to achieve the desired bond strength and durability.

While wider tolerances may allow for some flexibility in application, they can also increase the risk of surface issues and reduce the overall effectiveness of the pavement. Thus, adhering to the tighter tolerance of 0.01 gal/syd is aligned with industry standards for quality control in asphalt paving operations.