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- Title
Impact of Thermal Stress on Abrasive Dust from a Carbon Fiber-Reinforced Concrete Composite.
- Authors
Koch, Arne; Friederici, Lukas; Fiala, Petra; Springer, Armin; Di Bucchianico, Sebastiano; Stintz, Michael; Frank, Marcus; Rüger, Christopher Paul; Streibel, Thorsten; Zimmermann, Ralf
- Abstract
Recently, a novel corrosion-resistant construction material, Carbon Concrete Composite (C3), consisting of coated carbon fibers embedded in a concrete matrix, was introduced. However, thermal exposure during domestic fires may impact the release of organic pollutants and fibers during abrasive processing and/or demolition. Consequently, the objective of this study was to explore the emission characteristics of toxic compounds and harmful fibers during the dry-cutting after exposure to 25–600 °C (3 h, air). These parameters mimic the abrasive machining and dismantling after a domestic fire event. Mass spectrometry and chromatography served as analytical methodologies, and no organic pollutants for exposure temperatures ≥ 400 °C were found. In contrast, significant amounts of pyrolysis products from the organic fiber coating were released at lower temperatures. Studying the morphology of the released fibers by electron microscopy revealed a decrease in fiber diameter for temperatures exceeding 450 °C. At ≥550 °C, harmful fibers, according to the World Health Organization (WHO) definition, occurred (28–41 × 103 WHO fibers/m3 at 550–600 °C). This leads to the conclusion that there is a demand for restraining and protection measures, such as the use of wet cutting processes, suction devices, particle filtering masks and protective clothing, to handle thermally stressed C3.
- Subjects
WORLD Health Organization; FIBER-reinforced concrete; FIBROUS composites; CONSTRUCTION materials; ABRASIVE machining; CARBON fibers; THERMAL stresses; ABRASIVES
- Publication
Fibers, 2022, Vol 10, Issue 5, pN.PAG
- ISSN
2079-6439
- Publication type
Article
- DOI
10.3390/fib10050039