Hydrodemolition uses high-velocity water jets to remove deteriorated, delaminated, or contaminated concrete from reinforced concrete structures such as bridges, dams and parking garages. Concrete is removed using ultra-high pressure (UHP – 35,000 psi) waterjets operating at velocities exceeding 1,500 mph. Using UHP water, the hydrodemolition process requires significantly less water than lower pressure systems, while providing ultra-high quality hydrodemolition. The use of less water helps protect the environment and conserve a valuable resource. Because no abrasive is used, the waterjets do not damage the reinforcing steel or other embedded metal items.
Types of Concrete Removal
Benefits of Hydrodemolition
Hydrodemolition provides an excellent bonding surface, free from micro-fractures as well as many other benefits. Hydrodemolition is both an effective and efficient way to quickly remove deteriorated concrete and prepare the surface for the installation of a new concrete overlay or repair material.
Computer-controlled waterjets can remove the concrete to provide a rough and bondable surface (Scarification, High-Speed, Fast Track Hydrodemolition). Bond tests have proven that a monolithic slab is formed when new concrete is place over a surface prepared using hydrodemolition.
- The rough, irregular surface profile provides an excellent mechanical bond for all types of repair materials creating a monolithic repair
- The rough, irregular profile contains more surface area per square foot than any other type of concrete removal process
- Eliminates possibility of surface micro-fracturing (bruising) caused by traditional demolition methods
- Exposed aggregates are not fractured, split or damaged
- Reinforcing and other embedded metal elements are undamaged
- Robotic equipment insures uniform removal
- Lower strength and deteriorated concrete (delamination) is selectively removed
- Vibration to the surrounding structure is eliminated
- Minimizes disruptions to users of occupied space by significantly reducing transmitted sound vibrations through the structure
- Reinforcing steel (rebar) is cleaned, eliminating the need for sandblasting
- Increase speed of concrete removal, which can reduce construction time
- Minimizes dust and the potential for silicosis
- Robotic units reduce labor and minimize soft-tissue injuries compared to manual demolition