Crack routers are typically used to widen and deepen existing random cracks in asphalt concrete pavement. Crack routers are equipped with a rotating drum with bits and crack router is used for pavement repairing or trench excavation in the sectors of road, municipal engineering, construction, gas and telecommunication. It is much more minimized, energy saving, easy to transport and dynamic compare with cutting machine with electric motor. These bits can be configured for wide or narrow cuts on the job site and allow for maneuverability in mid-cut and adjust with a screw feed to the necessary depths.
Preparation of pavement cracks is important in successful sealant application. Routing or sawing random cracks prior to installation provides clean surfaces for sealant application and a 40 percent greater chance of sealant success. Cutting the pavement along the crack lines provides a reservoir for sealant in smaller cracks and an intact sidewall for adhesion.
There are some industries skip this step and move on to the next step that refers to the cleaning process, which is known as "blow and go." However, It is recommended that routing and sawing cracks before sealant installation, and will eventually become a job specification requirement. Cracks will need to be prepared with a crack router or concrete saw before installation, creating a smoother, deeper reservoir for sealant installation. And then a clean or concave surface will be required in anticipation of the installation of the new SuperPave system (See Sealant Application). Without routing or sawing before sealing, the new technology's performance could be compromised.
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