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- Title
Verbund in Glas‐Hartschaum‐Beton‐Sandwichelementen: Teil 2 – Experimentelle Untersuchungen zum Verbund zwischen Glas und Hartschaum.
- Authors
Weimar, Thorsten; Hammer, Christian; Leutbecher, Torsten; Metje, Kevin
- Abstract
Bond in glass‐rigid foam‐concrete sandwich elements – part 2: experimental investigations on the bond between concrete and rigid foam Sandwich elements in building envelopes with facing layer made of glass require currently mechanical or adhesive connectors. The absence of these connectors is of interest in terms of resource and energy savings both in production and in the building envelope. This paper reports on the bond behaviour between polyurethane rigid foam and float glass with different surfaces without and with the use of a bonding agent. The studies are part of the development of a glass‐rigid foam‐concrete sandwich element without additional adhesives and mechanical connectors. The results of adhesive tensile and shear tests show that a sandblasted roughened glass surface resulted in cohesive failure in the insulation layer. The production‐related different glass surfaces on atmosphere and tin side come to an adhesive failure between insulation layer and glass. Composites of glass and insulation layer without adhesion agent show no significant differences between the atmosphere and the tin side. Overall, the test specimens with bonding agents achieved higher levels of adhesive tensile and shear strengths. Light and electron microscopic studies of the fractured surface show that the bonding agent has a significant influence on the wetting and pore formation of the liquid polyurethane. The composite of the polyurethane rigid foam and concrete is described in part 1 of the paper.
- Subjects
GLASS composites; SANDWICH construction (Materials); URETHANE foam; SHEAR strength; CELLULAR glass; ADHESIVES
- Publication
Bautechnik, 2019, Vol 96, Issue 10, p740
- ISSN
0932-8351
- Publication type
Article
- DOI
10.1002/bate.201900017