Experimental Research on Mechanical Properties of the early-Age Shotcrete

Abstract:

Abstract. The compressive strength and elastic modulus of early-age shotcrete have important influence on the safety of tunnel during construction period. In order to investigate the laws of the mechanical properties of early-age shotcrete, experiments on the compressive strength and elastic modulus of early-age shotcrete with two different mixes used frequently on construction sites were carried out. The results show that the compressive strength and elastic modulus of shotcrete develop fairly rapidly and especially the development of elastic modulus of shotcrete is faster than that of ordinary concrete. There is an exponential relationship between the compressive strength and time as well as the elastic modulus development and time. Simultaneously their formulas were derived. The research results of this paper are not only helpful to understand the laws of the mechanical properties of early-age shotcrete, but also provide some reference for the reliability analysis of tunnel under construction.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 2188-2192
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.2188
• Online since: September 2011
• Authors: Nan Xie, Jie Ouyang, Bing Li, Jing Hui Lu
• Keywords: Compressive Strength, Elastic Modulus, Shotcrete

References

[1] Liping Lu, Zhong Shi: Concrete, Number 1 (2003), pp.33-34. (In Chinese).

[2] Lu Zhou, Yongchun Chen: Shrinkage and Creep. (China Railway Publishing House, China 1994).

[3] Jiye Li, jingqiang Liu, Feng Zhang, Zhongmei Xi: Practical Technology Manuals of Concrete Mix Design. (Chemical Industry Press, China 2008) (In Chinese).

[4] GB50010-2010, Code Concrete Structure Design (In Chinese).

[5] Zongming Yu: Low Temperature Architecture Technology Journal, Vol. 3(2002), pp.18-20 (In Chinese).

[6] Zongming Yu: Construction Technology, Vol. 10(1994) (In Chinese).

[7] Jianren Zhang, Haichen Wang, Weijun Yang: Journal of China and Foreign Highway, Vol. 22(3) (2003), pp.89-92(In Chinese).

[8] Bofang Zhu: Temperature Stress and Temperature Control of Mass Concrete. (China Electric Power Press, China 1999) (In Chinese).

[9] Xingping Lin: Journal of Yunnan Water Power, Vol. 15(4) (1994), pp.15-18(In Chinese).

[10] Yang Yang, Feiyun Chen: China Concrete and Cement Products Journal, Vol. 3(2004), pp.1-4(In Chinese).

[11] GB/T50081-2002, Standard for test of mechanical properties on ordinary concrete(In Chinese).

[12] Lennart Østergaarda, David A. Lange, Salah A. Altoubat, Henrik Stang： Cement and Concrete Research , Vol. 31(2001), pp.1895-1899.

[13] Vojkan Jovicic, Jakob Sustersic, Zeljko Vukeli: Tunneling and Underground Space Technology, Vol. 24(2009), pp.723-730.