One of the newest pothole-patching technologies, being used is the Rosco RA-300 asphalt spray patching machine. This patching machine is designed to fit onto a standard dump-truck body or be directly mounted to a chassis. Workers control all patching operations inside the cab by using a joystick to move the patching apparatus, which is located in front of the truck.

The RA-300 pothole patcher works by first cleaning the area to be patched. A high-volume blower provides a blast of air which removes loose rock and debris. Second, the same nozzle is used to supply a tack coat of hot asphalt to the area to be patched, including cracks and holes in the base. Third, with the touch of a button on the nozzle, aggregate and hot asphalt are combined with forced air and shot into the hole. Last, the valve controlling the hot asphalt is turned off, a dust coat of aggregate is applied, and traffic can flow immediately.

The experience in with the pothole patcher has been positive. The patches are more durable and also requires fewer workers to actually do the patching. With conventional patching, four to seven people must be assigned to each patching crew. Currently, one person operate the patcher and either two arrow boards or two flag people to direct traffic.

For information, contact Randy Reznicek at (612) 255-418, or Rosco Manufacturing, (605) 256-6942.