Influence of technological procedures on mechanical properties of bonded joint

Abstract

Facades are a key element in creating modern building designs. Their area is up to ¾ of the total area of the outer surface, and this also largely influences the interior of the building. The choice of the type of sheathing structure is not only dependent on the appearance or requirements of the indoor environment but also on the maintenance, the lifetime of the structure and the assembly technology. Ventilated facades, known as "Cold Facades", are an appropriate solution. The principle of these structures is based on the airflow in the gap between the outer and inner parts of the sheathing. The exterior cladding makes the visual aspect of the building and protects the structure against climatic influences. The inner part ensures the thermal, acoustic or fire requirements [1].

The risk of a different assessment of the performance of cementitious ceramic tile adhesives in the light of the results of interlaboratory comparisons

“…The study raises the issue of pull-off measurement reliability as its results infl uence decisions on how to repair the facade (46). Due to the observed variability related to the adhesion measurement, conclusions to modify the current model of assessment of construction products using this essential characteristic (35,41), in conjunction with another product feature, were formulated (30,35,41,50). It is also important because the method of measuring adhesion is destructive.…”

“…The literature also provides information that the sample preparation procedure infl uences the measured value of adhesion (50).…”

Impact of manufacturing imperfections and surface defects on stress–strain behaviour of flexible adhesive joints

“…The effect of manufacturing imperfections, surface defects and their combinations has already been tested by the authors on the sintered ceramic substrate in 2018; 20 therefore, some of the presented results will be compared also with this part of the research. The ceramic tile used was a non-porous material, thus a little different behaviour was expected from timber substrate.…”

“…When testing the influence of this group on ceramic substrate, the bond strength rate was reduced by only 3%. 20 It was observed that the contaminated surface prevented the adhesive from penetrating the substrate, since the fine particles of the sawdust formed a thin separation layer. In II group, as already mentioned above, the greatest decrease in bond strength was monitored in the 14th combination, i.e.…”

“…The effect of similar imperfections was described by the authors in the research case from 2018. 20 Moreover, the influence of technical and technological imperfections and a detail analysis of the effect of their combinations on the adhesive joint composed of EN AW-6060 aluminium alloy and sintered ceramic tile substrates was presented. The obtained results were similar to those presented by Kohl et al., 14 and it was confirmed that the combination of different types of technical and technological imperfections does not have to necessarily lead to a weakening of the adhesive properties and to the deterioration of adhesion strength.…”