Delamination Test of Glue Lines According to EN 391. Nordtest Project 1089-93

摘要

The European standard EN 391 is a method for testing the adhesive bond quality ofglued laminated timber. The principal of the method is to create stresses in the bond line by first saturating the test piece with water beyond the fiber saturation point, which leads to considerable swelling, and then drying it very quickly. This causes shrinkage at the surface and stresses perpendicular to the bond line. If the bond quality is insufficient, failures will occur. The length of the openings resulting from this, in relation to the bond line length, is called delamination, and is taken as a measure of the bond quality. Six glulam