PSI - Issue 52

Cheolwoo Park et al. / Procedia Structural Integrity 52 (2024) 480–486 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

485

6

Figure 6. Toughness of variables before and after exposure with high temperature.

Figure 6 shows the toughness of variables, before and after exposure to high temperature with single layer wrapped of basalt fiber sheet. After exposure to high temperature the toughness of the specimens decreased. Toughness at 1.0 % polymer used decreased with 5.2 % after exposure with fire.

4. Conclusion In this study, the flexural strength and toughness behavior with polymer percentage contain and wrapped with basalt sheet had been studied. Strength and toughness of specimens were analyzed before and after exposure to high temperature for 1 hour under ISO 834 curve. According to the experimental results adding upto 1.5 % of polymer with single layer wrapped basalt sheet minimize the failure rate on the structure. Polymer presents inside the structure melts under high temperature and create capillary pores. Vapor pressure created inside the structure flow outside form the capillary pores and improved the spalling on the concrete. The flexural strength and toughness of the structure decreased when exposure to the high temperature. To maintain the flow of slurry, powder polymer is good to use to make SIFRCCs structure because of the structure construction method. Acknowledgements This work was supported by the Korea Institute of Energy Technology Evaluation and Planning(KETEP) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. 20215810100020). Ahsanollah, B., Çaglar, Y., Hüseyin, Y., Halit, Y., 2016. Flexural performance of SIFCON composite subjected to high temperature. Constr. Build. Mater. 2016, 104, 99 – 108. Buchanan, A.H., Abu, A.K., 2017. Structural design for fire safety. John Wiley & Sons. Jin, C.L., Kang, H.T., 2018. Mechanism of PVA fibers in mitigating explosive spalling of engineered cementitious composite at elevated temperature. Cem. Concr. Compos. 93, 235 – 245. Kim, S., Oli, T., Park, C., 2020. Effect of Exposure to High Temperature on the Mechanical Properties of SIFRCCs. Appl. Sci. 10 , 2142. Kim, S., Park, C., Kim, Y., 2020. Effect of SIFRCCs with Varying Steel Fiber Volume Fractions on Flexural Behavior. Appl. Sci. 10 , 2072. Kim, S., Han, S., Park, C., Yun, K.-K., 2020. Compressive Behavior Characteristics of High-Performance Slurry-Infiltrated Fiber-Reinforced Cementitious Composites (SIFRCCs) under Uniaxial Compressive Stress. Materials 13 , 159. Muhammad, A., Xiaomeng, H., Wenzhong, Z., Raja, R.H., 2017. High temperature and residual properties of reactive powder concrete – a review. J. Constr. Build. Mater. 147, 339 – 351. References