Breywisch, Franziska

Diploma Thesis:
2053

Topic:
Research into the fiber morphology of non-metallic reinforcement structures after fire events

Editor: 
Franziska Breywisch

University Professor Responsible:
Univ.-Prof. Dr.-Ing. Dipl.-Wirt.-Ing. Jens Otto

Supervisor:
University Supervisor: Dipl.-Ing. Veit Klopfer

Editing Period:
13.05.2025 until 16.09.2025

Abstract:
This paper examines the fibre morphology of non-metallic reinforcement structures, specifically carbon fibres, before and after fire events, as well as their emission tendency during mechanical processing. Carbon reinforcements are characterised by high tensile strength and corrosion resistance, but when exposed to fire they undergo morphological changes such as matrix decomposition and fibre oxidation, which can lead to fragmentation and the potential release of respirable fibres. Two experimental tests compare the exposure levels of undamaged and fire-damaged carbon concrete components during various mechanical processing methods. The results show that the type of process has a significant influence on exposure, but no systematic increase in release due to thermal pre-damage could be detected. The work emphasises the need for further research and appropriate protective measures during demolition work involving carbon concrete.