The hydrodemolition process generates debris and wastewater (slurry water). The solid debris consists of chunks of concrete, aggregate and sand. Controlling the wastewater and cleaning up the debris has often been viewed as one of the more difficult tasks associated with the use of hydrodemolition. However, with the right equipment, good planning and installation of a collection system, wastewater and debris removal is easily managed.
Click on a picture below for additional information about cleanup and debris removal for various types of hydrodemolition.
Removal of the debris should be done as quickly as possible following hydrodemolition. The debris can quickly dry out and solidify making it difficult to remove. Debris that is allowed to dry in the hot sun is particularly difficult to remove and may require use of high-pressure water blasters (10,000-psi) to loosen the material so that it can be removed. If uncleaned for an extended period of time, the residual cement in the debris can hardened making it impossible to remove the debris without additional hydrodemolition. When it comes to debris removal, sooner is better and immediately is best.
Rampart performs cleanup services using vacuum equipment which contains a 10,000-psi water blaster pump. Our vacuum system provides the fastest and most efficient cleanup available. The 10,000-psi water blaster uses very little water while effectively cleaning the surface. The vacuum then quickly removes the debris from the surface. Our vacuum trucks also contain a hydraulic wastewater discharge pump to remove water from the truck during the cleanup operation without having to stop the work.
Cleanup methods will vary depending on the amount of concrete removed. If only the concrete cover is removed (scarification or shallow removal) then heavier equipment, such as a vacuum truck, can be driven on the surface to perform the cleanup can be used. However, if the rebar is exposed and unsupported (partial depth removal), light-weight equipment is required to prevent damage to the rebar and the structure. Our TracVac®is especially design for this type of removal. Adding the TracVac® to the vacuum truck makes cleanup following hydrodemolition quick and easy.
Some projects may be more easily cleaned by using handheld 10,000-psi water guns. The guns blast the debris onto the undemolished surface where it can be collected using a skidsteer or other type of loader.