Press releases

CONJET ASSISTS WITH REPAIRS TO ITALIAN VIADUCT
2009-07-02 — The multi-span reinforced concrete viaduct at Torano, about 100 km east of the Italian capital Rome, is a major structure on the main E80/A24/A25 Autostrada crossing central Italy. The Viadotto Fiume Salto was opened in the late 1960s, but the use of de-icing salts during winter months has since caused considerable calcium chloride damage to the structure forcing the Italian Highways Authority and the Autostrada di Parchi’s owner Toto S.p.a. to carryout extensive repairs. The renovation, funded by revenue from tolls, is expected to cost around €5M and is focusing on the piers and main joints in the concrete deck using the high pressure water jetting technique of hydrodemolition to remove the calcium chloride infected concrete.

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CONJET ASSISTS WITH CHANNEL TUNNEL REPAIRS.
2009-07-02 — Train services through the Channel Tunnel linking Britain and France, where scheduled to be fully restored in February 2009 following several months of repairs after a major fire in the tunnel on 11 September 2008. A lorry caught fire on a Shuttle train carrying heavy goods vehicles bound for France through the 50km long northern tunnel. The fire, which spread to other vehicles, raged for about 16 hours. The extreme temperatures of up to 1000ºC caused extensive damage to about 600m of the 7.6m diameter tunnel’s concrete lining, approximately 11km in from the French entrance.

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CONJET TO THE RESCUE IN CALIFORNIA TUNNEL FIRE REPAIRS
2008-03-18 — The fast response from the US specialist hydrodemolition contractor and rental company HydroPressure Cleaning Inc has 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. The California Department of Transportation instigated the approximate $19M restoration, which included the removal of the entire concrete skin from both walls of the fire damaged tunnel by HPC with its two Conjet hydrodemolition Robots, followed by reskinning with a new sprayed concrete lining.

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CONJET ASSISTS IN RESKINNING CONCRETE ARCH BRIDGE.
2007-07-05 — Strong winds picking up salt from the sea have caused unexpected calcium chloride damage and led to complex and challenging repairs to Croatia’s spectacular reinforced concrete double arch Krk Bridge, which links the northwest mainland at Kralievica, just south of the major port of Rijeka, with the islands of Sveti Marko and Krk. Bridge owner Croatia Highways Authority, Hrvatske autoceste has instigated the €3 M of repairs, which includes the tricky and demanding reskinning of about two thirds of the bridge’s smallest arch with a new sprayed concrete cover by specialist contractor Spegra Konstrucktor Inzcnjering, based in Split.

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CONJET ASSISTS IN REPAIRS TO MAJOR EUROPEAN HIGHWAY BRIDGE
2007-04-19 — The 1km long multi span steel box girder Moerdijk Bridge, over the Hollands Diep river near Dordrecht in the southern Netherlands, is a major structure on the vital E19/A16 European highway through Holland and Belgium. The current 45m wide, dual three lane bridge, opened in the late 1970s and built on the original concrete piers of the previous structure, is believed to be one of the most heavily trafficked bridges in Europe, carrying around 120,000 vehicles a day. During routine inspections of the nation’s steel bridges fatigue cracking was found in Moerdijk’s thin steel deck plate threatening the structure’s integrity, leading the Dutch Ministry of Transport to carry out extensive repairs and strengthening involving Doornbos and Conjet hydrodemolition equipment.

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BAUMA LAUNCH FOR NEW CONJET ROBOT 364
2007-04-19 — The leading Swedish hydrodemolition equipment manufacturer Conjet AB will use Bauma 2007 for the world launch of the latest model in its well renowned 360 range the Conjet Robot 364 MPA.

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CONJET HELPS IN REPAIRS TO MAJOR HIGHWAY BRIDGE IN CROATIA
2007-02-14 — The multi-span reinforced concrete bridge over the river Sava at Ivanja Reka, in the south east suburbs of the Croatian capital Zagreb, is a vital structure on the major E70 highway link through the Balkans. The bridge was opened in 1980 but the use of de-icing salts during winter months has since caused considerable calcium chloride damage, threatening the integrity of the structure and forcing the Croatia Highways Authority, Hrvatske autoceste, to carryout extensive repairs. The restoration, which is expected to cost over €10 M, is focusing on the concrete deck, parts of which have to be completely replaced and Hrvatske autoceste has specified the high pressure water jetting technique of hydrodemolition to remove the damaged areas.

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HYDRODEMOLITION BEST SOLUTION FOR MUSKÖ TUNNEL REPAIR
2006-01-04 — Hydrodemolition was chosen as the preferred technique to assist in the repair of a sub-sea road tunnel in Sweden joining the island of Muskö to the mainland in the southern Stockholm Archipelago. One of the very latest Conjet Robot 363 MPA high pressure water jetting hydrodemolition machines is playing a key role in the repairs by removing the damaged area of shotcrete lining in the tunnel crown that has been chemically attacked and weakened by water leaking in from above.

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PANAMA CANAL INCLUDES CONJET ROBOT IN MAJOR LOCK REPAIRS
2005-05-26 — The Panama Canal Authority, “Autoridad Del Canal De Panama” (ACP), has bought one of the latest Conjet Robot 363 MPA hydrodemolition machines. It will complement the two sets of Conjet Jetframe 122 hydrodemolition equipment the ACP has been using to remove concrete and assist with the replacement of the canal’s special tow track rail system since 1999.

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CONJET ROBOT ASSISTS WITH BRIDGE DECK WIDENING IN UK
2004-09-16 — A Conjet Robot 322 hydrodemolition machine, has been playing a key role in the UK removing concrete at a major redevelopment project in the centre of Plymouth, Devon. The Robot 322 on hire from Doornbos Rental UK in Southampton, is being used to accurately cut out the concrete from the reinforced deck and heavily reinforced cantilevered finger beams of a viaduct carrying a major road above a bus station, shops and café.

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CONJET CHECKS IN AT HEATHROW
2004-08-10 — A Conjet Robot 322 hydrodemolition machine, on hire from Doornbos Rental UK in Southampton, has been playing a key role removing damaged concrete in the first phase of a major structural renovation of Heathrow Airport’s central area Car Park 1A/B. Contractor Taylor Woodrow Corrosion Engineering & Concrete Repairs, is using the Doornbos Rental Conjet Robot 322 to remove decaying concrete from the decks and soffits of the multi-storey car park as part of its £8M concrete repair and refurbishment contract for client BAA/Heathrow Airport Ltd.

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BAUMA LAUNCH FOR LATEST CONJET WIRELESS CONTROL UNIT
2004-03-05 — Conjet AB will use Bauma 2004 for the world launch of the wireless control unit for its industry leading Conjet Robot 322 and Conjet Robot 432D hydrodemolition machines, which use a very high pressure water jet to remove concrete from numerous structures, including tunnel and hydro-electric turbine linings, bridge decks, joints, soffits, pillars and columns, harbour and dock walls, dam faces, car parking decks and airport runways.

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PANAMA CANAL USE CONJET TO ASSIST IN MAJOR LOCK REPAIRS
2003-12-01 — Conjet hydrodemolition equipment is playing a key role in removing concrete and assisting with the replacement of the Panama Canal’s special tow track rail system. The track is used by powerful electric rack and pinion drive locomotives to assist in towing and guiding ships through the canal’s three sets of twin lane locks. The “Autoridad Del Canal De Panama” (ACP), Panama Canal Authority, which has the exclusive charge of the canal’s administration, management, operation and maintenance, is responsible for removing the 16,188 m of worn out tow track, which runs along the tops of the lock walls, and replacing with a new stronger system to cater for the increase in canal traffic and high loadings from the locomotives.

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Conjet Robot 362s Assists in high speed tunnel repairs
2003-07-01 — Italian civil engineering contractor CO.I.PI. S.p.A. has successfully used its two Swedish Conjet Robot 362 hydrodemolition Robots and its own purpose built “Cammello” hydrodemolition machine, with Conjet computer control system, to assist with high speed concrete repairs to a section of one of the two road tunnels on the main A22 Verona Brennero autostrada at Bolzano, in the north east of Italy, about 80 km from the Austrian border. Damaged parts of concrete tunnel lining, in a section of the southern 6 m radius horseshoe shaped tunnel, were removed in just 18 days, following corrosion due to a combination of carbonisation, chloride attack and freezing and thawing cycles.

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Introduction of the compact Conjet Robot 322
2002-06-06 — Conjet AB will use the World of Concrete exhibition in Las Vegas to add the compact Conjet Robot 322 to its comprehensive range of high pressure water jetting equipment which selectively removes weakened and damaged reinforced concrete from numerous structures. The new Conjet Robot 322 is a remotely operated hydrodemolition robot aimed at smaller contractors entering the market.

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Sweden´s supersonic waterjet
2002-05-30 — Removing damaged or poor quality concrete from sensitive structures such as bridges, dam walls, tunnels, docks, harbours and multi-storey car parking decks using pneumatic and hydraulic breakers or road milling machines is universally accepted as being very inefficient and even damaging to the structure being repaired.

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Conjet´s new compact hydrodemolition machine for tunnel repairs
2002-05-30 — Conjet AB has added the compact Conjet Robot 302 hydrodemolition machine to its comprehensive range of high pressure water jetting equipment which selectively removes weakened and damaged steel reinforced concrete from numerous structures.

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Advances in Hydrodemolition in Sweden
2002-05-30 — High pressure water jetting equipment is extremely efficient at removing damaged concrete. Carl Strömdahl, President of Conjet AB, herein outlines the development of this increasingly popular concrete repair technique.

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The history of hydrodemolition
2002-05-01 — High-pressure water jetting equipment is extremely efficient at removing damaged concrete. Carl Strömdahl, President of Conjet AB, outlines the development of this increasingly popular concrete repair technique.

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