Influence of Technological Procedures on Mechanical Properties of Bonded Joint

abstrakt

angličtina

It would not be an exaggeration to say that adhesive joints have been an essential part of the construction industry for several decades now, and their use has become a suitable alternative in this industry as well. The current trends in modern architecture, which place emphasis on pure aesthetic expression, are also a major advantage. A suitable example is the realization of ventilated building envelope systems, where mainly mechanical fasteners are used despite the fact that they can cause deformation of the individual elements of the facade or cause the formation of oxidation stains on the facade cladding. By using the technology of bonded joints on the other hand, these problems can be avoided completely. A substantial disadvantage of bonded joints is, however, the very strict requirements for adherence to the technological procedures defined by the manufacturers of assembly systems. Even a slight deviation from the recommended application steps can have a significant effect on the integrity of the entire system. In the research, five of the most common types of failure to comply with technological procedures in the realization of facade cladding were selected and tested. The aim of the research project was to determine the extent to which a failure to adhere to technological procedures during facade construction can influence the effectiveness of the glued joint. In construction practice, it is quite common during the implementation of a project that there are failures to comply with multiple requirements, or deviations from the prescribed procedures. For this reason, not only individual types of failure to comply with technological procedures were tested, but also their combinations. Altogether, 32 combinations of selected types of failure to comply with technological procedures were tested on two different types of cladding. The glued joint was tested for shear strength and the adhesion of the glue to the substrate on a total of 384 samples. The results of the tests clearly confirm the hypothesis that failure to comply with technological procedures has a significant effect on the effectiveness of bonded joints. It is mainly the different combinations of failure to comply with technological procedures where the glued joint loses effectiveness in the order of tens of percentage points.

Technological Procedures; Mechanical Properties; Bonded Joint

LIŠKA, P.; NEČASOVÁ, B.; ŠLANHOF, J.

5. 9. 2018

Publindústria, Produção de Comunicação, Lda.

Lisabon

978-989-8927-24-8

Book of abstracts of the 12th European Adhesion Conference and 4th Luso-Brazilian Conference on Adhesion and Adhesives

144

144

312

https://paginas.fe.up.pt/~euradh2018/