Long-lasting restorations using automated concrete removal

Why use ACR™ when restoring Bridges?

Bridges are iconic landmarks connecting people and facilitating trade. They are by default also exposed to weather, wind, and other external forces in the surrounding environment. What causes the concrete to age over time are, in general: chloride penetration, freeze-thaw cycles and carbonization. Eventually, all bridges need maintenance and their critical functions create the demand for a concrete bridge repair solution with great precision, that is safe for the operator while causing limited traffic disturbance.

Conjet’s Automated Concrete Removal robots, utilizing the hydrodemolition technology, are the right choice if you are looking for concrete bridge repair methods that will maximize the bridge’s lifespan, increase workers’ safety and minimize traffic impacts. We call it ACR™.

Supervised Robotic concrete removal with hydrodemolition technology

Challenges when restoring bridges

Restoring concrete bridges is very demanding work due to the tight schedules, engineer specifications, and safety hazards for the operator, construction crew and the public. Difficulties also arise from bridges’ complex structural elements, including:

  • Abutment walls
  • Beams
  • Bearing foundations
  • Decks
  • Piers (pipes)
  • Parapet walls
Conjet robotic hydrodemolition for concrete bridge repair and maintenance
Conjet robot - concrete's surface preparation technologies

This is how acr™ helps during a concrete bridge repair:

  • Abutment walls: If the robot arm does not allow you to reach the removal area, a tower attachment or a frame system are available.
  • Beams: The integrated arm of the robot allows you to remove the slab with the robot positioned on a solid area for high-precision concrete beam repair.
  • Bearing foundations: If there is not enough room for the standard robot, a frame system can get the job done.
  • Decks: With today’s high volumes of traffic, the schedules are tighter than ever before. The Conjet ACR™ robot with ConjetONE control allows for ease of operation and less down time, helping you stay on schedule.
  • Piers (Pillars): A frame system can be set up on the pier, and you can accomplish the removals either in stages or with a larger frame that covers the entire area in one set up.
  • Parapet walls: When reaching over the wall, not only can you extend the tracks but also slide the body of the robot for extra stability. Without any additional attachments.
Supervised Robotic concrete removal with hydrodemolition technology


One of the biggest challenges on all sites where concrete is being removed, or even demolished, is to ensure the health and safety of the workers. Using ACR™ robots to perform a concrete bridge repair is a way to keep a safe working environment for the workers. The robots are operated via the ConjetONE control system, allowing all operations to be configured and monitored from the radio remote control box at a safe distance from the robot.

Hydrodemolition work with Conjet robot


The ACR™ robots have very little unplanned downtime, and the time to shift operation mode is optimized thanks to the innovation and engineering behind the ACR™ robots.

ACR™ robots also help ensure the job is completed on time and according to specification. One ACR™ robot can do the work of 25 jackhammers, resulting in high-speed and high-precision concrete removal and bridge repair.

Conjet hydrodemolition robot performing demolition work


Since ACR™ uses hydrodemolition technology and creates no vibrations or micro-cracks, it is the most sustainable technology used for restoration of concrete structures like bridges. At the same time, it keeps the rebar intact and leaves a surface ideal for bonding. This results in a far longer useful life for the bridge.

Customer case

Beijing fayan engingeering technology ltd
Huanghe river bridge

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