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Elevated temperature adhesion testing of spray‐applied fire‐resistive materials

Effective fire protection of steel can be fully realized when spray‐applied fire resistive materials (SFRMs) are bonded sufficiently to structural steel during the event of a fire. The adhesion mechanisms and characterization at elevated temperatures, however, have remained elusive, owing to a shortage of quantitative experimental measurements of adhesion between SFRMs and structural steel. In complement with recent efforts aiming to measure the adhesion at ambient temperature, this contribution reports an experimental method based on a fracture mechanics approach to quantify temperature dependent adhesion behaviors of SFRMs adhered to steel substrates.