Qualities of High-Strength Lightweight Concrete Used for Construction of Arctic Offshore Platform

1990 ◽  
Vol 112 (1) ◽  
pp. 27-34 ◽  
Author(s):  
D. Tachibana ◽  
M. Imai ◽  
T. Okada
Keyword(s):  
Arctic Ocean ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
High Strength ◽  
The Arctic ◽  
Oil Exploration ◽  
Freezing And Thawing ◽  
Freeze Thaw ◽  
The Arctic Ocean ◽  
Exploration And Production

Concrete employed in oil exploration and production platforms for use in shallow offshore zones of the Arctic Ocean is required to be lightweight, yet high strength, and moreover possess adequate resistance to freezing and thawing. Generally speaking, lightweight concrete, using artificial lightweight aggregate, has lower freeze-thaw resistance and this presents a serious problem. The study reported here was carried out on the freeze-thaw durability, constructibility and other properties of high-strength lightweight concrete. This paper especially points out the governing factors influenzing freeze-thaw durability of this type of concrete and describes a method of manufacturing concrete possessing superior durability.

scholarly journals Forecast of Gas Hydrates Distribution Zones in the Arctic Ocean and Adjacent Offshore Areas

Geosciences ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 453 ◽  
Author(s):  
Vasily Bogoyavlensky ◽  
Aleksei Kishankov ◽  
Alisa Yanchevskaya ◽  
Igor Bogoyavlensky
Keyword(s):  
Arctic Ocean ◽  
Gas Hydrates ◽  
World Ocean ◽  
The Arctic ◽  
Methane Hydrates ◽  
The Arctic Ocean ◽  
Exploration And Production ◽  
Different Temperatures ◽  
Hydrocarbon Fields ◽  
Conducting Research

Gas hydrates (GH) are perspective energy sources, containing significantly more gas resources compared with conventional fields. At the same time, GH pose a danger for exploration and production of hydrocarbon fields. Methane release to the atmosphere is also a substantial factor of climate change. The objective of this research was the forecast of distribution of zones, favorable for GH existence in the Arctic Ocean and adjacent offshore areas, limited by the 45° latitude. For conducting research, existent data of National Oceanic and Atmospheric Administration (NOAA) on near-bottom water temperatures was analyzed. Using CSMHYD software, based on empirical equations of GH stability, minimal depths appropriate for methane hydrates formation at different temperatures were calculated. On the basis of obtained values, a cartographic scheme with a zone favorable for methane hydrates existence was created. The zone corresponded to distribution of BSRs defined in seismic sections, including those discovered for the first time on the continental slope of the Laptev Sea and in the TINRO Depression of the Sea of Okhotsk. Besides, the zone concurred with the results of other authors research, summarized in the geoinformation system “AWO” (The Arctic and the World Ocean), which could verify the validity of conducted forecast.

USGS Arctic Ocean Carbon Cruise 2012: Field Activity L-01-12-AR to collect carbon data in the Arctic Ocean, August-September 2012

Data Series ◽  
10.3133/ds862 ◽  
2014 ◽  
Author(s):  
Lisa L. Robbins ◽  
Jonathan Wynn ◽  
Paul O. Knorr ◽  
Bogdan Onac ◽  
John T. Lisle ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
The Arctic ◽  
Field Activity ◽  
The Arctic Ocean ◽  
Ocean Carbon

A remarkable pogonophoran from a desalted shallow near the mouth of the Yenisey River in the Kara Sea, with the description of a new species of the genus Galathealinum (Annelida: Pogonophora: Frenulata)

2020 ◽  
Vol 29 (1) ◽  
pp. 138-154
Author(s):  
R.V. Smirnov ◽  
O.V. Zaitseva ◽  
A.A. Vedenin
Keyword(s):  
New Species ◽  
Arctic Ocean ◽  
Anterior Part ◽  
Morphological Characters ◽  
Kara Sea ◽  
The Arctic ◽  
External Layer ◽  
The Arctic Ocean ◽  
A New Species ◽  
Unusual Finding

A new species of Pogonophora obtained from one station at a depth of 25 m from near the Dikson Island in the Kara Sea is described. Galathealinum karaense sp. nov. is one of the largest pogonophorans, the first known representative of the rare genus Galathealinum Kirkegaard, 1956 in the Eurasian part of the Arctic Ocean and a highly unusual finding for the desalted shallow of the Yenisey Gulf. Several characters occurring in the new species are rare or unique among the congeners: under-developed, hardly discernible frills on the tube segments, extremely thin felted fibres in the external layer of the tube, and very faintly separated papillae in the anterior part of the trunk. Morphological characters useful in distinguishing species within the genus Galathealinum are defined and summarised in a table. Diagnosis of the genus Galathealinum is emended and supplemented by new characters. Additionally, three taxonomic keys are provided to the species of Galathealinum and to the known species of the Arctic pogonophorans using either animals or their empty tubes only, with the brief zoogeographical information on each Arctic species.

Positions of the non-Arctic States on the legal regime of the Arctic Ocean

2018 ◽  
pp. 124-135 ◽  
Author(s):  
A. Vylegzhanin ◽  
◽  
V. Salygin ◽  
I. Dudykina ◽  
E. Kienko ◽  
...  
Keyword(s):  
Arctic Ocean ◽  
The Arctic ◽  
Legal Regime ◽  
The Arctic Ocean
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