Effects of Elevated Temperatures on the Compressive Strength of HFCC

Abstract:

This paper presents the results of elevated temperatures on the compressive of high fly ash content concrete (HFCC). The specimens were prepared with three different replacements of cement by fly ash 30%, 40% and 50% by mass and the residual compressive strength was tested after exposure to elevated temperature 250, 450, 550 and 650°C and room temperature respectively. The results showed that the compressive strength apparently decreased with the elevated temperature increased. The presence of fly ash was effective for improvement of the relative strength, which was the ratio of residual compressive strength after exposure to elevated temperature and ordinary concrete. The relative compressive strength of fly ash concrete was higher than those of ordinary concrete. Based on the experiments results, the alternating simulation formula to determine the relationship among relative strength, elevated temperature and fly ash replacement is developed by using regression of results, which provides the theoretical basis for the evaluation and repair of HFCC after elevated temperature.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 416-420
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.416
• Online since: May 2011
• Authors: Fu Ping Jia, Heng Lin Lv, Yi Bing Sun, Bu Yu Cao, Shi Ning Ding
• Keywords: Compressive Strength, Elevated Temperature, High Fly-Ash Content Concrete (HFCC)

References

[1] Yang Taiwen. Research development on high performance high volumn fly ash concrete. Concrete, 2004, 179(9):22-26. (in Chinese)

[2] Song Shaomin, Li Honghui, Xing Feng. Research on carbonation resistance and steel corrosion resistance of high volumn fly ash concrete. Journal of Wuhan University of Technology, 2008, 30(8):38-42. ( in Chinese)

[3] Jin Zuquan, Sun Wei, Zhang Yunsheng et al. Multi-factor service life prediction model for concrete with fly ash. Journal of Southeast University , 2005,35(1):149-154. (in Chinese)

[4] Qian Jueshi, Meng Zhiliang, Zhang Xinyuan. Carbonation resistance of high addition fly-ash concrete. Journal of Chongqing Jianzhu University, 1999, 21(1):5-9. (in Chinese)

[5] Rafat Siddique Performance characteristics of high-volumn Class F fly ash concrete. Cement and Concrete Research, 2004, 34:487-493.

DOI: 10.1016/j.cemconres.2003.09.002

[6] N.Bouzoubaa, M.H. Zhang, V.M. Malhotra. Mechanical properties and durability of concrete made with high-volumn fly ash blended cements using a coarse fly ash. Cement and Concrete Research, 2001, 31:1393-1402.

DOI: 10.1016/s0008-8846(01)00592-0

[7] Wu Bo, Liang Yuehuan. Statistical Analysis of strength of concrete and steel bar after high-temperature treatment. Journal of South China University of Technology (Natural Science Edition), 2008, 36(12):13-20.

[8] Guo Zhenhai, Shi Xudong. Caculation and performance of reinforced concrete after elecated temperature.Beijing: Tsinghua University Press, 2003:3-7.

[9] Jia Fu-ping, Lv Heng-lin, Cui Yanli etc. Investigation on degraded behavior of concrete specimen at different heated temperatures. Journal of CUMT, 2009, 38(1):25-29.

[7] Luigi Biolzi, Sara Cattaneo, Gianpaolo Rosati. Evaluating residual properties of thermally damaged concrete. Cement & Concrete Composites, 2009, 30:907-916.

DOI: 10.1016/j.cemconcomp.2008.09.005

[11] Ali Behnood, Masoud Ghandehari. Comparison of compressive and splitting tensile strength of high-strength concrete with and without polypropylene fibers heated to high temperatures. Fire safety Journal, 2009, 44:1015-1022.

DOI: 10.1016/j.firesaf.2009.07.001

[12] Hsuanchih Yang, Yiching Lin, Chiamen Hsiao, JianYou Liu. Evaluating residual compressive strength of concrete at elevated temperatures using ultrasonic pulse velocity[J]. Fire Safety Journal, 2009, 44:121–130.

DOI: 10.1016/j.firesaf.2008.05.003