What is the term used for a surface treatment involving a layer of asphalt and aggregate?

The term "single-pass surface treatment" refers to a method in which a single application of asphalt and aggregate is spread over a prepared surface. This technique is commonly used to enhance the surface of roads, providing a smooth finish while sealing the underlying layers to protect against water infiltration and weathering. The appropriate combination of asphalt and aggregate helps to create a durable and skid-resistant surface, which is essential for maintaining road safety and longevity.

In comparison, other treatments such as double-pass surface treatments would involve two separate applications, resulting in different maintenance and performance characteristics than a single application. Cemented surface treatments typically refer to those that use cementitious materials rather than asphalt, which is not the focus here. Composite surface treatment might imply a combination of different materials or methods, but it does not specifically relate to the single application technique that is described in this case. Thus, single-pass surface treatment accurately captures the process outlined in the question.