TY  - JOUR
AB  - 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 × 104 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 .
AU  - Koch, A.*
AU  - Friederici, L.*
AU  - Fiala, P.*
AU  - Springer, A.*
AU  - Di Bucchianico, S.
AU  - Stintz, M.*
AU  - Frank, M.*
AU  - Rüger, C.P.*
AU  - Streibel, T.
AU  - Zimmermann, R.
C1  - 65062
C2  - 52373
TI  - Impact of thermal stress on abrasive dust from a carbon fiber-reinforced concrete composite.
JO  - Fibers
VL  - 10
IS  - 5
PY  - 2022
SN  - 2079-6439
ER  -