Geopolymeric Adhesives for Aluminium Joints

Abstract

Bonded joints have been used in substitution of more traditional techniques as screws, rivets and mainly welding. However, the applications in which the work temperatures are relatively high remain as an obstacle to the use of more common polymeric adhesives. In this sense, the study of adhesive properties of thermally stable materials as the geopolymers becomes a need. This work deals with the adhesion of aluminium sandwich beams using geopolymeric adhesives. Metakaolin-based geopolymers were used as adhesives, activated with sodium and potassium silicates. Shear mode adhesion tests were accomplished and the results indicate the possibility for use of these new adhesives.

Numerical and experimental investigation of shear strength between the steel tube and cement paste in petroleum wells

“…To the preparation of geopolymer, it was initially performed the kaolin calcining, heated to 700°C for 2 h, such as the kaolin reaches to the metakaolin condition and becomes more reactive. After manual mixing of the geopolymer precursors, the tube was coated with a layer of cement from the geopolymer synthesized with 2 mm and the same was brought to the drying oven to cure and remained at 55°C for 24 hours, conditions which provide good mechanical properties to the geopolymer [7]. Finally, after the curing of the geopolymer, the tube coated with this material was placed into the mold and the cement was injected, concluding the molding of the specimen.…”

Geopolymerics Adhesives for Joint Steel Plates

“…Although the synthesis of these materials involves solidification processes with mechanisms extensively studied by the scientific community, the geopolymers technology is still recent. In Brazil, the first works come fom the late nineties [10][11]. In this work, it was investigated the adherence of the substrate-adhesive-substrate system through propagation trials of the clefts in Mixed-Mode Flexure Test.…”