What is the recommended gallon per square yard for an open graded friction course that is newly constructed?

The recommended gallon per square yard for an open graded friction course that is newly constructed is 0.05 gallon per square yard. This quantity is determined based on the specific requirements for achieving the appropriate density and performance characteristics of the open graded friction course. It ensures that there is enough binder to coat the aggregate and provide the necessary adhesion, while also preventing excessive binder that could lead to problems like bleeding or rutting.

In this context, the amount of binder is critical to maintaining the durability and functionality of the surface. Open graded friction courses are designed to enhance drainage and provide better skid resistance, which is especially important in maintaining safety on roadways. Therefore, adhering to the recommended binder application rate is essential for achieving the desired performance outcomes. The other quantities of binder, while potentially applicable to different types of asphalt mixes or conditions, do not align with the specifications set forth for new open graded friction courses.