Segmented diamond blades are used for cutting hard and abrasive materials such as concrete, asphalt, stone, and brick. The diamond segments, which are arranged in a pattern on the blade, provide an abrasive surface that cuts through the material. The segments also help to prevent the blade from overheating during use, which can cause damage to both the blade and the material being cut. The spaces between the segments allow for the removal of debris and water, which helps to keep the blade cool and prevent clogging. Overall, segmented diamond blades are a highly effective and efficient tool for cutting tough materials.