This paper illustrates the various research and their results that were carried out earlier on the experimental studies on the strength of concrete in seawater. The use of concrete offshore drilling platforms and oil storage tanks is already on the increase. Concrete piers, decks, breakwater, and retaining walls are widely used in the construction of harbors and docks. Installation on the field rov-arbeid inni draugen, forsidebilde, slep, engelsk, The Draugen platform being towed to the field offshore. winds can carry sea water spray up to a few miles in land from the coast). The paper gives a general description of the Concrete Gravity Base Structure (GBS) for the Draugen platform Installed by Norwegian Contractors a s The GBS was Installed at the Haltenbank area on the Norwegian continental shelf In May 1993 for NS Norske Shell. The platform was finally in position on 17 May, Norway’s Constitution Day, and an improvised parade was staged on the helideck. Two pipelines connect the facility to a floating loading-buoy. Stabilised oil is stored in tanks at the base of the facility. The field has been developed with a concrete fixed facility and integrated topside and has both platform and subsea wells. Moreover, 80 percent of the earth is covered by seawater either directly or indirectly (e.g. The Draugen field in the Norwegian Sea was operated by Shell until it was sold to OKEA in 2018. The effect of seawater on concrete deserves special attention as the coastal and offshore structures are exposed to simultaneous action of a number of physical and chemical deterioration processes. The latter were also ready and waiting nearby to be joined to the GBS, with subsequent assembly hook-up. Casting the last of these concrete structures had finished and it lay out in the Gands Fjord to be prepared for mating with the steel topsides. However most of the reinforced concrete codes do not permit the use of seawater due to risk of early corrosion of reinforcement. Work on Troll A had begun, Draugen was under construction, and Sleipner A was nearing completion. Vimolbajra Ruksakiati, Ambassador of Thailand to Norway, along with officers from the Embassy, paid a study visit to an offshore oil production platform Draugen located on Norwegian Continental Shelf, 150 kilometers from Kristiansund, upon the invitation by Bangchak Corporation Public Company Limited. Additionally, if use of seawater as concrete material is permitted, it will be very convenient and economical in the construction especially in the coastal works. Why Draugen The most unique feature from the Norwegian oil industry is the use of concrete platforms Concrete Deepwater Structures, Condeep. As there is a scarcity of fresh drinkable water around the world so there is a need to save fresh water and hence possibilities of using seawater as mixing as well as curing water should be investigated seriously. Several billion tons of water is annually used as mixing, curing and cleaning around the world, in concrete industry.
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