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Waterlogged wood consolidation

Magnetic resonance imaging (MRI) has been applied to the study of the distribution of fluid components (i.e., water or a polymer used as consolidant) in a porous material such as stone or waterlogged wood by a direct visualization of the water or fluid confined in the opaque porous medium [13]. [Pg.15]

Monomers with low molecular weights will diffuse into the wood more rapidly than polymers such as PEG. In a second phase, their in situ radiation curing will form wood consolidants that are much stronger than PEG. However, this method requires very heavy irradiation equipment, which is usually available only in nuclear research centers. The irradiation cell dimensions and the 7-source geometry limit the size of the artifacts. For mainly these reasons, the radiation process was applied in very few institutions and in most cases only at the experimental level. The Nucleart Laboratory, which routinely conserves waterlogged wood by this technique, is located in the Grenoble Nuclear Research Center of the French Atomic Energy Commission. [Pg.218]

Structural consolidation depends on placing the consoUdant where strengthening is required. Distribution of the solid consolidant in the object should be as uniform as possible to reduce stresses at interfaces. However, uniformity of distribution is not easily achieved and seems possible only if the consolidant can be immobilized where it is needed. This can be achieved using consolidants, which react by cross-linking with themselves or the object, for example silane consolidation of fossils but not the matrix (Davidson and Alderson, 2009). The consolidant can be immobilized by freezing it in situ, as in the poly(ethylene glycol) consolidation of waterlogged wood (Jensen and Jensen, 2006). The penetration of the consolidant into the smaller pores or molecular structure is... [Pg.122]

Dammar applied in solution has been used for the consolidation of iron (Rathgen, 1905), waterlogged wood (Barker, 1973 Blackshaw, 1974) and other materials (Hiibner, 1934 Plenderleith, 1934). [Pg.272]

An MF resin, Kauramin CE 5549, was proposed as a consolidant for waterlogged wood and lacquerwork (Hoffmann and Wittkopper, 1999) as a replacement for Arigal C and Lyofix DML (Haas, 1969 Grattan and Clarke, 1987). The pre-polymer is applied as a solution in water. It was cured in solution using an added catalyst and heat. Butylated amino-formaldehyde resins were used as coatings, especially for ceramics (Chinaglaze) (Tennent, 1983). The resin solution is mixed with an acid catalyst before apphcation. Chinaglaze was a UF resin modified by the addition of an alkyd (phthalic acid polyester), which yellows badly. [Pg.316]

PEG-Treated Wood. Wood treated with PEG will also have modified gluing properties, although, if properly redried, not as much so as heavily consolidated wood. The use of PEG as a dimensional stabilization treatment was developed in the 1950s (20) and it has been used on a limited scale since then. The utility of PEG treatment for waterlogged archaeological wood is now widely recognized, and it is quite possible that some of the wood so treated has been or will need to be glued. [Pg.394]


See other pages where Waterlogged wood consolidation is mentioned: [Pg.25]    [Pg.27]    [Pg.218]    [Pg.219]    [Pg.361]    [Pg.421]    [Pg.121]    [Pg.207]    [Pg.226]    [Pg.249]    [Pg.264]    [Pg.296]   
See also in sourсe #XX -- [ Pg.107 ]




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