The Experimental Study on Realkalization Repair for the Durability of RC Structure after Fire

Abstract:

The damages to reinforced concrete structures subjected high temperature of fire mainly include the followings: high temperature make the microstructure of concrete be loose and porous, the strength of concrete and steel reduce greatly.The alkaline hydration products of cement was decomposed under the high temperature, which would destroy the alkaline environment of concrete around steel and cause the steel corrosion. In this paper, the machanism of realkalization technique is present. Moreover, method of mercury intrusion pore measurement, SEM analysis and investigation on pH Value of concrete pore solutions experiment were carried out to study the durability repairing efficiency of realkalization technique.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 699-703
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.699
• Online since: May 2011
• Authors: Yan Xiong, Di Wu
• Keywords: Durability, Fire Damage, RC Structure, Realkalization Repair

References

[1] Chi-Sun Poon, et al.: Cement and Concrete Research Vol.31 (2001), p.1307–1318.

[2] Zhang Yi and Jin Weiliang: Industrial Construction Vol. 35(2005), p.93–96, in Chinese.

[3] XU Zheng-kai, YUAN Zhi-jun and HU Ji-qun: Engineering Mechanics Vol. 23(2006), p.117–130, in Chinese.

[4] WANG Kong-fan, XU Qing-feng and LIU Ting-lin: Construction Technology Vol. 34(2005), p.9–11, in Chinese.

[5] Wu Bo: Mechanical properties of RC structures after fire (Science Publishers, Beijing 2003), in Chinese.

[6] YAN Hui-qun, et al.: Journal of Sichuan University Vol. 40(2008), p.74–78, in Chinese.

[7] Kowbel W and Pate LK, et al. Vol. 46(2001), p.2577–2581.

[8] Powers-Couche L.: Concrete Repair Digest Vol.1 (1992), p.241–248.

[9] Powers-Couche L., in: Proceedings of the 16th International Conference on Cement Microscopy, edtied by Cement Microscopy Association, Texas (1994), in press.

[10] Z.P. Bazant and M.F Kaplan: Material Properties and Mathematical Models (Addison-Wesley, London 1996).

[11] B. Georgali and P.E. Tsakiridis: Cement Concrete Composites Vol.27 (2005), p.255–259.

DOI: 10.1016/j.cemconcomp.2004.02.022

[12] Bruno Huet, et al.: Electrochimica Acta Vol.51 (2005), p.172–180.

[13] Emmanuel E. et al.: Journal of Performance of Constructed Facilities Vol.12 (1998), p.77–84.

[14] Velibasakis E E, et al.: Concrete International Vol.19 (1997), pp.39-45.

[15] A.W. Adamson: Physical Chemistry of Surfaces (Science Publishers, Beijing 1985), in Chinese.

[16] Шейкин, А.Е, Hu Chunzhi translates: Structure and Properties of Concrete (China Architecture & Building Press, Beijing 1984), in Chinese.

[17] C. J. Newton and J. M. Sykes: Cement and Concrete Resarch Vol. 17 (1987), p.765–776.

[18] Lianfang Lia, et al.: Cement and Concrete Research (2005), P. 277–283.