B.T. INNOVATION

Spacers made of glass-fiber-reinforced plastics minimize thermal bridging in double walls

Figure: B.T. innovation

The GRP spacers fixed in the testing press: 1 a) prior to loading and 1 b) during loading

Figure: B.T. innovation

Under 1 b) the bar shows pronounced deflection, leading to interlaminar shear failure of the glass fiber

Figure: B.T. innovation

Force-time diagram: The GRP spacers were subjected to compressive loading by a test press and the progression measured. The various states during the tests are shown based on GRP spacer 300.  the glass fibers at a support area give way;  the glass fibers at the second support area give way.  interlaminar shear failure.  Fracture of the glass fibers. GRP spacer 500 shows directly a bending of the GRP bars, causing no major damage to the support points.

Figure: B.T. innovation

Behavior of the support point under the action of a compressive load (from left to right): before loading; 4 kN; 10 kN; 11 kN

Figure: B.T. innovation

The bar following loading with 11 kN shows a completely intact support point and a buckled support point

Figure: B.T. innovation

At the end, the punching shear behavior of the bar was investigated

Figure: B.T. innovation

Tabelle 1 Ermittelte tolerierbare Last eines GFK-Abstandhalters. Aus zehn Messwerten wurden der höchste und niedrigste Messwert gestrichen und aus den verbleibenden acht Messwerten der Mittelwert gebildet und auf die nächst niedrigere natürliche Zahl abgerundet

Core-insulated double walls manufactured with high efficiency and high quality are widely used worldwide. There is an increasing trend toward building with the least possible thermal conductance and with optimization of the insulation characteristics in walls.

Composite anchors with glass-fiber-reinforced plastics (GRP) and with virtually no thermal conductivity are capable of eliminating numerous possible thermal bridges. In addition, spacers are frequently used to ensure dimensional uniformity of wall thickness. Suitable here are also spacers made of GRP, which are capable of eliminating...