What is the maximum temperature range for Asphalt Binder Grade PG 58-28?

The maximum temperature range for Asphalt Binder Grade PG 58-28 is correctly identified as 350-400°F. This grade designation indicates that the asphalt binder is suitable for performance in temperatures that can reach up to 58°C and is expected to handle traffic loads at lower temperatures down to -28°C.

The use of the two numbers in the grade indicates the high temperature and the low temperature performance characteristics respectively. The upper temperature limit of 58°C (or approximately 136°F) nearly aligns with the requirements for hot-mix asphalt applications, where the binder needs to maintain its properties under significant temperature variations from environmental conditions and operational stresses.

Understanding that asphalt binders are crucial for paving applications where both the binder's ability to remain workable at high temperatures and its stiffness at low temperatures is essential helps clarify why PG 58-28 operates effectively in the specified temperature range of 350-400°F. This temperature range is also consistent with the handling and application practices used in the asphalt industry, ensuring that the material performs adequately during installation and service life.

Noting why the other choices fall outside of the acceptable range further reinforces the understanding of asphalt binder properties, as they do not meet the necessary temperatures for effective function in roadway applications.