What does PG stand for in asphalt binders?

In the context of asphalt binders, PG stands for Performance Graded. This terminology is essential as it refers to a classification system used to grade asphalt binders based on their performance characteristics in various temperatures and loading conditions. The Performance Graded system takes into account the climate of the area where the asphalt will be used, ensuring that the selected binder will perform adequately under expected conditions. This grading system helps in providing durable and reliable pavement structures by matching the binder's properties to environmental conditions, traffic levels, and expected pavement lifespan. Therefore, understanding the significance of Performance Graded binders is crucial for engineers and technicians in the asphalt industry to make informed decisions regarding material selection and application.