Effects of diamond grinding and grooving on tire/pavement noise

摘要

Diamond grinding and diamond grooving are two methods of refurbishing existing Portlandcement concrete roadways. Both methods use diamond-infused steel blades to remove some ofthe roadway. In diamond grinding, the cutting blades are spaced close together, and the finsbetween the channels can break off, resulting in a rough contact patch. In diamond grooving, theblades are farther apart and the contact patch is similar to the original road surface. Using OBSItesting on the resulting roadways, it has been determined that ground and grooved surfaces canexhibit vastly different noise characteristics than the original surfaces. In this paper, therelationship between noise characteristics and properties of the refurbished surfaces is examined.It was found that the noise characteristics depend primarily on the contact patch left behind afterthe grinding process. By increasing the space between the blades, it was possible to reduce theroughness of the pavement and thereby decrease noise.