Case stories, films and press releases
The Case stories show the successful use of Conjet Robots to remove concrete. Our representatives are present all around the world for a better contact with you. To find the representative closest to you, please use the form found on this page.
The proven and long established repair technique, known as hydrodemolition, has been extensively used throughout North America, Europe, Russia, the Middle East and South East Asia over the past 29 years.
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Press releases are found here
Case stories
Conjet-Case-Story-Glenlee-Power-station-324-UK
“I was very impressed with the cleaning process and the Conjet Robot, which did a great job. I was also surprised at how quick it was at taking off the old coating back to the bare metal,” said CRL site manager Fran Allan.
Conjet-Case-Story-Rio-Verde
Repairs to the Rio Verde viaduct were performed from a special, purpose built cradle and working platform that wrapped round all four sides of the piers and supported by wire ropes connected to winches at ground level.
Conjet to Rescue in California Tunnel Fire Repairs
The fast response from the US specialist hydrodemolition contractor and rental company Hydro Pressure Cleaning Inc (HPC) contributed to the rapid repairs to a strategic road tunnel in the Newhall Pass on the major I-5 Interstate near Santa Clarita, California about 30 miles (48km) north west of Los Angeles.
Conjet assists in World’s most extensive concrete bridge repairs
The use of brackish water in the concrete mix led to extensive and complex concrete repairs to Sweden’s combined Svinö and Öland Bridge that reached nearly twice the cost of the original structure when restoration is finally completed.
Conjet cleans up on major Zürich bridge
Specialist Swiss hydrodemolition contractor Wan-Jet AG responded to local environmental pressure and developed an acoustic shroud, which has considerably reduced the noise level of its Conjet Robots. The exceptionally quiet Robot 363 allowed an increased daily working time by 2 hours.
Conjet Robot boosts up power plant capacity
A Swedish Conjet Robot 361 hydrodemolition machine has played a major role in boosting the electricity generating capacity of three hydro-electric power plants on the Drava River in the Republic of Slovenia. Contractor Gradis is using its Conjet Robot for removing concrete from nine vertical turbine draft tubes. This operation will make way for new reshaped steel linings and larger diameter, more efficient, greater capacity turbine generator sets.
Conjet Robot 361 assists in repair to major viaduct
The versatility of a Conjet Robot hydrodemolition machine has been successfully demonstrated during the SFr7M repair and strengthening of the major Ponti Del Valico dual two lane concrete viaduct, which straddles the Swiss Italian border at Chiasso, 50km north of Milan.
Conjet Robot preforms laser surgery on UK rail overbridge
Specialist hydrodemolition contractor Laser Civil Engineering successfully used its Swedish Conjet Robot 362 high-pressure water-jetting machine to to carryout vital concrete surgery during essential repairs to the northbound A404M bridge deck, which carries the major trunk road over the Western Region Railway line at Maidenhead in England.
Conjet Robot assists in bridge strengthening
One of the Swedish contractor E-Schakt’s Conjet hydrodemolition Robots has assisted in the strengthening and reconstruction of the deck parapets of a single carriageway bridge, which carries the “Spånga Kyrkväg” road over a path and cycleway at Tensta, about 15km north west of Stockholm.
Midskog hydropower station. Repair of a concrete dam built in the 40’s
The Midskog hydropower station is part of the river Indal’s water regulation system in Northern Sweden. The dam was bulit during the 1940’s and is a combined earth fill and concrete dam.
Excellent results when using hydrodemolition for removal of deteriorated conrete in repair of first Los Angeles aqueduct tunnel
A unique adaption of concrete removal hydrodemolition equipment has facilitated efforts of the City of Los Angeles to meet a major challange in the repair of l44 miles of tunneling and conduits bringing water from the Sierra Nevada mountains to the greater metropolitan area.
Hydrodemolition on Wabash bridge resurface job speeds work, reduces cost
A US $ 1.67 million bridge rehabilitation project in Indiana was utilizing hydrodemolition technology instead of jackhammers for concrete removal and finished up in record time and saved the Indiana Dept. of Highways an estimated US $ 500.000 in direct costs.
Conjet’s diesel Robot performs surgery on bridges in New York state, USA
Specialist US hydrodemolition contractor IVS Hydro Inc has successfully used the first diesel powered Conjet Robot 432 D highpressure water-jetting machine in the US to carry out vital concrete surgery during essential repairs to two sets of dual carriageway bridges on Route 15 near the town of Painted Post, New York State.
Conjet Robot 362 assists in Lisnave dry dock repair
The Portuguese contractor Belbetoés, a subsidiary of Portugal’s leading civil engineering contractor Teixeira Duarte SA, has chosen one of the latest Swedish Conjet Robot 362 hydrodemolition robots to assist with extensive and major concrete repairs to Lisnave’s vast Mitrena reinforced concrete dry dock, near Setubal, about 50 km south east of the Portuguese capital Lisbon.
Conjet Robot assists in emergency tunnel repairs
A Swedish Conjet Robot 362 hydrodemolition machine has played a vital role in successfully assisting in the unexpected emergency repairs to the damaged concrete cooling water outfall tunnel at the Bridgeport Harbour coal fired power station in Bridgeport, Connecticut, USA.
Conjet Robot restores the Skanstull Bridge in Stockholm
A Conjet Robot high pressure water jetting hydrodemolition machine was playing a key role in the SEK 22 M repair and strengthening to the deck if major Skanstull Bridge in Stockholm, Sweden.
Conjet Robot proves versatility on hydrodemolition contract
The versatility of a Conjet Robot hydrodemolition machine has been successfully demonstrated during the 7 million Swiss Franc repair and strengthening of the major Ponti Del Valico. The dual two lane concrete viaduct, straddles the Swiss Italian boarder at Chiasso, 50km north of Milan.
Conjet Robot restores flyover at Staples Corner, U.K.
The first Robot 360 hydrodemolition machine in the UK proved a major success on its debut contract assisting in repairing North London’s A5 Edgware Road flyover, which was severely damaged by a terrorist bomb in April 1992.
Conjet repairs frost damaged water channel
Specialist German hydrodemolition contractor Krüger Wasserhochdrucktechnik, using its Conjet Robot 360 high pressure waterjetting machine, has successfully assisted in the very unusual and tricky repair to, new cooling water feed channel at the country’s Boxberg coal fired station.
Carpark restored by a Conjet hydrodemolition robot
The Swedish hydrodemolition contractor NCC Waterjet, with its fleet of seven Conjet Robot high pressure water jetting machines, was employed by the telecommunications company Ericsson to carry out SEK 7M of repairs to one of its reinforced concrete carparks, outside of Stockholm.
Impressive debut for Conjet tunnel repair robot
Conjet’s smallest and most compact hydrodemolitionmachine Robot 302, developed for use in small tunnels, bridge deck boxes and other similar confined spaces, has exceeded expectations on its debut contract removing concrete lining from a water supply tunnel feeding the Centrale Grossotto hydro-electric power station in northern Italy.
Repairing and modifying hydroelectric power station in Sweden
Landforsen rapids are part of the Dalälven (River Dal) water system close to Älvkarleby, a small community near the Baltic Sea. The power station was completed in 1930 and developed originally 30 MW at max power its 3 identical Kaplan turbines. In 1948 a fourth turbine was installed and the max power output from the station was increased to 38 MW.
Statoil use Conjet to repair pipe lines at the bottom of the North Sea
The pipe lines sometimes needs to be repaired or extended and when doing so, the concrete need to be removed from the outside of the pipe. Using the Conjet equipment enables concrete removal and steel cutting in one “dive”, saving time and money.
The film below shows the test that were performed before taking the equipment in operation.
Film
Below are video clips that show Conjet equipment in different applications.
Click on the arrow to start the film.
Click on the arrow to start the film.
Clips on 
Conjet Nalta is, by far, the smallest automated hydrodemolition equipment on the market. It provides the means for the contractor to utilize the full capacity of the hand-lance pump. The handlance operator controls the Conjet Nalta through radio control (or cable control) at a safe distance giving him a full view of the work at hand.
The Conjet Nalta can operate with a reaction force of up to 600N (compared to 250N for a human operator).
The Panama Canal is one of the busiest lock system in the world. The two lanes operates 24/7, 365 days. Tug trains (55 metric tonnes) are used to pull the ships in position. They run on special tracs on each side of each lane. These tracks are replaced every once an awhile.
When the tracks are replaced, anchoring points are first exposed using hydrodemolition. This requires hydrodemolition down to around 600 mm depth. Conjet AB supplied the necessary tools for a successful operation.
While exposing the anchor points, traffic could not be stopped. When a tug train passed, the cutting head was simply rotated out of the way and when the train has passed, rotated back to its original position. That menat that a minimum of downtime was spent on relocating the cuttin head.
Water for Glenlee Power Station, in Scotland, plunges 125 m down the hillside through a 570 m long steel penstock of varying diameters to the station’s twin 6 MW turbines. The penstock was in need of cleaning and repainting why a Robot 324, equipped with a standard tunnel kit, was used to clean the inside of the penstock.
N.E.T. Waterjet Ltd, had to clean about 4,200 m2 from the inner surface of the 1.8 m to 3 m diameter penstock with its Conjet Robot 324 working on gradients up to 18 degrees.
The Robot 364 was used on this project, the Guri Dam project in Venezuela, to remove concrete from the spillways. The dam has been in operation for the past 40 years. Water force and sun had taken its toll on the spillway concrete why repair was needed.
The Robot 364 was selected because of its outstanding reach. The Multi Purpose Arm (MPA) reaches over 5 meters out in the horizontal plane.
