Concrete Spincasting

Stormwater pipes and related assets are subject to wear and failure if not properly inspected and maintained. Stormwater pipes have an expected design life that is greatly influenced by the quality of the original installation and ongoing preventative maintenance. Regular inspections and preventative maintenance can help extend the life of the structure, prevent failures and reduce the public safety risk of dangerous sinkholes. Waiting until an issue shows up on the ground surface can be extremely costly when compared to regular maintenance cost and can be extremely dangerous for the public. Centrifugally Cast Concrete Pipe (CCCP) or “Spin-Casting” and Robotic Shotcrete Concrete Pipe (RSCP) is used to structurally restore deteriorated CMP and RCP Pipes from 30” to 120” diameter (RSCP greater than 48” diameter). Both processes use the same material, and both provide a structural and cost-effective solution to deteriorated and failing pipes with no digging or traffic disruptions. There is no repaving or utilities to relocate. It can be used in most pipe shapes and in pipes with bends. The new pipe is 100% environmentally friendly, structurally sound and fully sealed from end to end without seams. HOW THE PROCESS WORKS…….

The process begins with an inspection of the pipe to be restored. Based on depth, size and other factors, a thickness is determined for the application. Preparation work then begins. Flow through the pipe is diverted and gravel, mud, roots, and debris are removed. After this, the interior is thoroughly cleaned. In some cases, buckling, leaks, voids and damaged invert and joints will require repairs prior to installation of the CCCP or RSCP. The high-speed spin-casting equipment or robotic shotcrete nozzle is secured to the retrieval sled in the center of the pipe at the opposite end of the pipe from the pump. As the high strength, fiber reinforced mortar is pumped and cast evenly around the interior of the pipe, the application equipment is retracted using a custom wench system at a set speed to insure an even application of the predetermined thickness.

Unlike other processes, the application equipment can be started and stopped as needed without joints or gaps. The only thing left behind is a seamless, high strength, fully structural pipe.