Performance Evaluation of High Strength Concrete with Composite Fibers in Accordance with High Temperature

Title & Authors
Performance Evaluation of High Strength Concrete with Composite Fibers in Accordance with High Temperature
Kim, Seung-Ki; Kim, Woo-Suk;

Abstract
The objective of the present study is to investigate how elevated temperature ranging from $\small{100^{\circ}C}$ to $\small{800^{\circ}C}$ as well as room temperature affects the variation of mechanical properties of high strength concrete ($\small{over\;f_{ck}=60MPa\;grade}$). In this experiment, specimens were exposed for a period of $\small{2^{\circ}C/min}$ to temperatures of $\small{20^{\circ}C}$, $\small{100^{\circ}C}$, $\small{200^{\circ}C}$, $\small{300^{\circ}C}$ $\small{400^{\circ}C}$, $\small{500^{\circ}C}$, $\small{600^{\circ}C}$, $\small{700^{\circ}C}$ and $\small{800^{\circ}C}$, respectively. Accordingly, the study investigated the fire resistance performance of high strength concrete mixed with composite fibers which composed with hybrid fibers and steel fibers. After cooling down to ambient temperature, the following basic mechanical properties were then evaluated and compared with reference values obtained prior to thermal exposure: (i) compressive strength in room temperature; (ii) residual compressive strength; (iii) Poisson's ratio; (iv) weight change; (v) SEM analysis & XRD analysis In addition, XRD and SEM Images analyses were performed to investigate chemical and physical characteristics of high strength concrete with composite fibers according to high temperature.
Keywords
High strength concrete;XRD;SEM analysis;Composite fiber;Spalling;Elevated temperature;
Language
Korean
Cited by
References
1.
Behnood, A., and Ghandehari, M. (2009), Comparison of Compressive and Splitting Tensile Strength of High-Strength Concrete with and without Polypropylene Fibers Heated to High Temperature, Fire Safety Journal, 44, 1015-1022.

2.
Han, M. C., and Choi, H. K. (2011), The Effect on Mechanical Properties and Micro-structure of High Strength Concrete at Elevated Temperature, Journal of Architectural Institute of Korea, 27(3), 123-130.

3.
Han, C. G., and Kim, W. K. (2009), An Experimental Study on the Curing Method and PP Fiber Mixing Ratio on Spalling Resistance of High Strength Concrete, Journal of the Korea Institute of Building Construction, 9(6), 113-119.

4.
Han, C. G., Kim, S. S., Kim, S. S., and Pei, C. C. (2008), Spalling Prevention of High Strength Concrete Due to Hybrid Organic Fiber and Different Lengths of Polypropylene Fibers, Journal of Architectural Institute of Korea, 24(2), 61-68.

5.
Jang, K. H., Pei, C. C., Jin, H. L., Jee, S. W., Yang, S. H., and Han, C. G. (2007), The fire resistance properties of the high strength concrete with various contents of nylon and polypropylene fibers, Proceeding of the Korea Institute for Structural Maintenance and Inspection, 11(1), 311-314.

6.
Kang, Y. H., Kang, C. H., Choi, H. G., Shin, H. J., and Kim, W. J.(2014), Compressive Properties of Ultra High Strength Concrete Exposed to High Temperature, Journal of the Korea Concrete Institute, 26(3), 377-384.

7.
Kim, W. S., Kang, T. H.-K., and Kim, W. J. (2014), State-of- Art Research and Experimental Assessment on Fire-Resistance Properties of High Strength Concrete, Journal of the Korea Institute for Structural Maintenance and Inspection, 18(3), 28-39.

8.
Kim, W. S., Kim, S. K., Lee, H. J., Lee, H. S., Kang, Y. H., and Kim, W. J. (2014), A Study of Characteristic Change of High Strength Concrete with Hybrid Fibers & Steel Fibers at High Temperature, Journal of the Korea Institute for Structural Maintenance and Inspection, 26(2), 435-436.

9.
Kim, H. Y., Seo, K. W., Lee, W. J., Kim, N. H., and Park, C. G. (2004), Effect of fiber blending on material property of hybrid fiber reinforced concrete, Proceedings of the Korea Concrete Institute, 16(2), 349-352

10.
Kim, J. H., Shin, Y. S., Moon, K. H., Park, C. G., and Kim, J. S. (2011), Fire Resistance Performance of High Strength Concrete Column with Hybrid Fiber Reinforcement, Journal of Architectural Institute of Korea, 27(5), 85-92.

11.
Kodur, V., and Sultan, M. A. (2003), Effect of Temperature on Thermal Properties of High-Strength Concrete, Journal of Materials in Civil Engineering, 15(2), 101-107.

12.
Lee, H. S., Kang, Y. H., Kim, W. S., and Kim, W. J. (2014), Mechanical properties of high strength concrete mixed with hybrid fibers under high temperature, Proceeding of the Korea Concrete Institute, 26(2), 355-356.

13.
Park, J. M. (2009), An Experimental Study about Fire Resistance Characteristics of High Strength Concrete with Polypropylene Fiber and Steel Fiber, Master thesis, Konkuk Univ., Dept. of Architectural Engineering.

14.
Reis, M., Neves, I., Tadeu, A., and Rodrigues, J. (2001), High-Temperature Compressive Strength of Steel Fiber High-Strength Concrete, Journal of Materials in Civil Engineering, 13(3), 230-234.

15.
Yoon, M. H., Kim, G. Y., Lee, T. G., Shin, K. S., Lee, W. J., and Lee, J. H. (2012), Spalling properties of ultra high strength concrete according to the melting and vaporization point of mixed fiber, Proceedings of the Korea Concrete Institute, 24(1), 865-866.