Context

Reusing flat glass requires reliable knowledge of its mechanical properties, particularly bending tensile strength, since glass fails at surface defects. The characteristic bending tensile strength of float glass is specified in DIN EN 572‑1 based on tests on new glass. Additional surface damage arising from manufacturing, processing, transport, installation, use (e.g., cleaning) and dismantling can significantly reduce the residual strength of aged glass. There is a lack of quantitative data on how ageing affects the strength distribution of reclaimed glazing. To make sound decisions on the structural reuse of aged glass, it is essential to determine its strength statistically and compare it with normative values. This thesis aims to contribute to the assessment of residual strength in aged glass panes, thereby providing a scientific basis for safe and economical reuse.

Possible topics for the thesis could include:

– Literature research on the characterization of the flexural strength of float glass,

- Literature research on studies to determine the strength of aged glazing and comparison with new glass,

- Experimental investigations: preparation of samples from dismantled insulating glazing from the 1990s and determination of the biaxial flexural strength of aged glass,

- Examination of the guideline for tested type statics of multi-pane insulating glass (IFT VE-15/1) and analysis of whether the determined strengths of aged glass allow reuse in accordance with the guideline.

Languages: english or german