What is the purpose of using a wedge in asphalt paving?

The purpose of using a wedge in asphalt paving is primarily to allow for proper drainage and prevent water ponding. A wedge is utilized to create a sloping surface that facilitates water runoff, ensuring that water does not accumulate on the pavement surface. This is crucial in maintaining the integrity of the asphalt and extending its lifespan, as standing water can lead to deterioration and issues such as cracking or potholes. Proper drainage is essential not just for the longevity of the asphalt but also for safety, as it helps prevent slick surfaces that can lead to accidents.

While aesthetic appeal can be enhanced through various means in paving, it is not a primary function of the wedge. Increasing the thickness of the pavement can be accomplished in other ways, typically through the application of additional layers of asphalt. Cost reduction in materials is often a consideration in asphalt paving, but the use of a wedge specifically addresses drainage, making it vital for proper installation and functionality.