What is the lowest temperature limitation for BASE according to paving standards?

The lowest temperature limitation for BASE according to paving standards is set at 40°F. This specific temperature is crucial because asphalt materials require a certain minimum temperature to ensure proper compaction and bonding. If the temperature is too low, the asphalt may not achieve the desired workability, which can lead to issues such as inadequate density, compaction problems, and potential premature cracking of the pavement once it is in service.

Maintaining the right temperature when paving is essential to achieving optimal performance and longevity of the asphalt surface. The specifications and provisions surrounding temperature limitations are rooted in extensive research that highlights the effects of temperature on asphalt mix behavior during placement and compaction. Standards are put in place to guide contractors in creating durable pavement structures, which is why 40°F is established as the lowest acceptable limit for BASE in this context.