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Strong winds picking up salt from the sea have caused calcium chloride damage and led to complex and challenging repairs to Croatia's spectacular reinforced concrete double arch Krk Bridge, which links the north west mainland at Kraljevica with the islands of Sveti Marko and Krk. Bridge owner Croatia Highways Authority has instigated £2M of repairs, which include 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. A Conjet Jetframe 122 high pressure water jetting hydrodemolition machine is playing a vital role in the repairs. Spegra is removing contaminated concrete to a depth of about 30mm over an area of about 2,000m 2 from all four faces of the rectangular section 8.3m wide, 4m deep reinforced concrete arch.

Any exposed reinforcement corroded to below 80% of its original area is also replaced.

The concrete special begins on page 22.

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