Effect of Fireproof Coatings on the Post-Fire Behavior of CFRP Composite Sheets

• Published in: Applied sciences Vol. 13; no. 18; p. 10369
• Main Authors: Qiang, Xuhong, Wang, Kaihao, Jiang, Xu, Xiao, Yi, E, Yibo
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.09.2023
• Subjects: Carbon fiber reinforcement; carbon fiber-reinforced polymer; Civil engineering; Coatings; Concrete; Cooling; Decomposition; fire resistance; fireproof coatings; Investigations; large-space fire condition; Mechanical properties; Nanocomposites; Polymers; post-fire flexural properties; Protective coatings; standard fire condition; Temperature; Tensile strength; China
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app131810369

This study examines the effect of two self-developed novel fireproof coatings on the fire resistance of carbon fiber-reinforced polymer (CFRP) composite sheets. The post-fire flexural properties were chosen as important indicators of fire resistance. This research involves two distinct fire conditions, the standard fire condition and the large-space fire condition, to simulate general interior fires and large-space fires. The post-fire flexural performance of CFRP sheets coated with two different self-developed fireproof coatings was evaluated through three-point bending tests after fire exposure. The experimental findings demonstrated a significant reduction of up to 80% in the post-fire flexural properties of CFRP sheets without fireproof coatings. However, CFRP sheets coated with fireproof coatings exhibited a substantial enhancement in their post-fire flexural properties. Under the large-space fire condition, the fire-resistance duration of CFRP sheets coated with fireproof coatings of at least 25 mm thickness exceeded 2 h, satisfying the requirements of GB50016-2014 fire-resistance class III (columns), class I (beams), and class I (floor slabs), respectively. Under the standard fire condition, CFRP sheets covered by fireproof coatings of 35 mm thickness exhibited a fire-resistance duration of 0.75 h, meeting the requirements of GB50016-2014 fire-resistance class IV (columns), class IV (beams), and class III (floor slabs), respectively.