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A carbon fibre composite (CFC) Byelorussian peat corer

Author(s): L.G. Franzén | T.L. Ljung

Journal: Mires and Peat
ISSN 1819-754X

Volume: 5;
Issue: 01;
Start page: 1;
Date: 2009;
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Keywords: lightweight corer | metal contamination | over-sized | peat sampling | Russian peat corer

The design specification, development and manufacture of a Byelorussian (Russian) peat corer constructed from carbon fibre composite (CFC) are described. The availability of this new composite material introduces new possibilities for constructing field instruments that are as strong as, or stronger than, equipment made from steel and other metals. One advantage is a significant weight reduction. A 10.5 metre coring set in standard stainless and soft steel weighs around 16 kg, whereas the total weight of a similar CFC set is 5.2 kg, giving a weight reduction of almost 70%. The CFC sample chamber is 500 mm long with internal diameter 65 mm, and so contains almost twice the volume of peat that can be collected with a standard 45 mm diameter steel corer. The diameter of the rods is 30 mm, which improves ergonomics, and the CFC has better thermic properties for winter use. Another advantage is that the contamination of samples (notably by chromium and nickel) associated with the use of steel corers is eliminated. The CFC sampler works well in soft peats such as Sphagnum and Carex types. It is less suitable for little-decomposed fibrous and forest peats (e.g. Polytrichum type) and those containing hardwood remains, especially in the more compacted bottom layers. It should be totally satisfactory for organic lake sediments, but probably not for stiff and coarse mineral deposits.

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