High-speed scarification is an economical option when job specifications call for removal of less than one-quarter (¼) inch of concrete. This process is typically used on new bridge decks that are in need of a new overlay. This process is twice as fast as the standard hydrodemolition process. Production rates for the High-speed scarification process are usually around 1,200 to 1,500 sy/shift depending on the job type and site conditions. This machine can also be used for roadways where there is a need to flush the asphalt. High-speed scarification roughens the concrete to a bondable surface, which exposes the underlying aggregate in the concrete slab. This roughened surface will improve the bonding, tensile strength and shear transfer of the new overlay.Whether we employ a single Blaster Vac or a tandem of Blaster truck and vacuum truck depends upon the scale of the project and related factors. The slideshow below shows a variety of images and projects where high-speed scarification was successfully employed
- One engine powers components; water blaster (36,000 psi), vacuum blower and hydraulics, there are several advantages of having a unit powered with one engine. One advantage is that no other supporting equipment is required. This helps increase the efficiency and production on your projects.
- Fresh water storage; holds 3,000 gals of fresh water. The scarification process uses 3,000 to 4,000 gals per/shift.
- Soiled water storage; the soiled water is continuously collected and is pumped from the debris holding tank to a separate holding tank to allow for more debris storage. The soiled water tank can then be pumped off for treatment or discharge.
- Debris storage; as the debris and water are continuously collected during the removal process, the debris and water are separated in the debris holding tank. Once the water is separated from the debris it can be taken to a dump location on the jobsite and hauled to a landfill for disposal.
- Hydrostatically driven; truck is hydraulically driven and controlled using a friction held joystick. There are displays in unit that monitor the forward speed and allow the operator to adjust parameters on the fly. This means that the desired depth of removal can be repeated with ease and allow for a uniform profile.
Rampart’s high-speed scarification process was featured on a National Geographic special. The work was being performed on the Dan Ryan Expressway in Chicago, IL. Click here to watch the video: