Final answer:
The typical size of aggregate used for single-surface treatments in road construction ranges from 1/4 inch to 1/2 inch (6 mm to 12 mm), which is selected based on factors like traffic and road conditions.
Step-by-step explanation:
When it comes to pavement maintenance, a single-surface treatment is a common method used to seal and add texture to roadways. The size of the aggregate used in this process can vary depending on several factors including the treatment objectives, the type of traffic, and the existing road conditions. However, for a standard single-surface treatment, the most typically used aggregate sizes range from 1/4 inch to 1/2 inch (6 mm to 12 mm). This size of aggregate ensures proper adhesion to the asphalt binder while providing good coverage and interlock to protect against weather and traffic wear. It is crucial to select the appropriate aggregate size to promote longevity and performance of the pavement surface.