Consolidant adhesion test

The conclusion of excellence, however, is reserved for consolidants dissolved in polar solvents. When toluene was used as the solvent, very little adhesive quality remained for AYAT and Acryloid B72. The use of toluene-ethanol as solvent reduced the shear strength for Butvar B98 by a relatively small amount, compared to ethanol alone as the solvent. These results agree with previous consolidation tests, in which the improvement factor tended to be larger for polar solvents than for nonpolar solvents (12), The poor adhesion of systems with nonpolar solvents may in part result from the superior penetration of nonpolar solvents, leaving little or no adhesive on the surfaces to be bonded. 

There is a need for fiorther research to confirm these findings and consolidate the new and relatively simple method to enhance the bending resistance of glulam beams. Large scale creep tests need to be carried out for bipartite beams connected with suitable adhesives one such creep test is currently being carried out for the adhesive type 027 described above. Potential applications such as arches or long span structures, as well as the possible economic advantages should be studied in more detail. 

Berger, G. A. (Ed.). (1970). The testing of adhesives for the consolidation of paintings. Papers presented at annual meetings in Washington (1968), Los Angeles (1969) and New York (1970). lie American Group. 

Bradley, S. (1984). Strength testing of adhesives and consolidants for conservation purposes. In N. S. Bromelle, (Ed.), Adhesives and consolidants, Paris Congress, 2-8 September 1984 (pp. 22-25). International Institute for Conservation. 

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