Bending Strength of Damaged Timber Beam Repaired by Adhesive-vacuumed Method

Six scaled-specimens of glued-acacia beam were tested in bending and effectiveness of non-metal repair of damaged beam by epoxy adhesive-vacuumed method was investigated. Two failure modes of glued-acacia beams by bending test were crack in bottom center and split from edge. Different covering method was used for them. MOE of type A showed fairly good recovery after repair. However in comparisons both specimens between bending strength before and after repair remarkable degradation. The epoxy adhesive-vacuumed method in full cover condition was thought to be appropriate and bending strength has possibility to increase more. The reason is adhesive is difficult to permeate the crack inside of the beam, they can permeate mostly from the surface.