PSI - Issue 64

Niloofar Heirani et al. / Procedia Structural Integrity 64 (2024) 6–13 Author name / Structural Integrity Procedia 00 (2019) 000–000

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repeatability. The incorporation of supplementary cementitious materials such as silica fume and slag also led to better fiber dispersion and improved repeatability. Mixing speed and the order of mixing had the least effect on repeatability. Based on this non-exhaustive examination, the optimal CFCP sensor was determined to contain 15% CF and GU with 20% SF, mixed at a high speed with a centrifugal mixer, with CF added at the start. However, it was noted that mixes exceeding 5% CF were challenging to work with, suggesting a lower CF content may be more practical. Other factors, such as mixing duration and the addition of other conductive fillers (e.g., a hybrid of CF and CNT or CF and CB), may also influence sensor response. 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