Hydro-Abrasive Erosion of Concrete Incorporated with Nano-SiO2, Super-Fine Slag or Rubber Powder
HE Zhen, CHEN Xiaorun, YANG Huamei, CAI Xinhua State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China
In this paper, we investigates the concretes respec- tively incorporated with 5% (m︰m) nano-SiO2 (NS), 40% (m︰m) super- fine slag (SS), as well as 40% (m︰m) SS combining 20% replacement of sand volume with RP. The tested mechanical properties include compressive strength, abrasion resistant strength, and elastic modulus. The results indicate that among these concretes, the SS-RP concrete has the highest abrasion re- sistant strength with increment ratios of 1.71 and 1.35 at 28 days and 90 days, respectively; the SS concrete has the highest com- pressive strength with increment ratios of 2.03 and 1.95 at 28 days and 90 days, respectively; the elastic modulus of SS-RP concrete significantly decrease compared with the SS concrete and is slightly higher than that of the reference concrete. It is concluded that NS, SS, and RP all can improve the abrasion resistance of concrete, and it will be significantly improved when SS combining RP is incorporated.
 Lian Jijian, Yang Min. High Dam Discharge Engineering [M]. Beijing: China Water Power Press, 2008 (Ch).
 Liao Bi’e. The mechanism and approach to improve the abrasion resistance of concrete [J]. Hydropower Technology, 1993, 9: 25-29(Ch).  Graham J R, Greegan P J, Hamilton W S, et al. Erosion of concrete in hydraulic structures [J]. ACI Materials Journal, 1987: 148-149.
 Horszczaruk E. Abrasion resistance of high-strength con- crete in hydraulic structures [J]. Wear, 2005, 259: 62-69.
 Horszczaruk E K. Hydro-abrasive erosion of high perform- ance fiber-reinforced concrete [J]. Wear, 2009, 267: 110-115.
 Wang Lijiu, Wang Baomin. Influence of nano-SiO2 on the performance of Portland cement [J]. Concrete Technology, 2003, 43: 666-669(Ch).
 He Zhen. Research on Abrasion-Erosion Resistant High Performance Concrete (AER-HPC) [D]. Wuhan: The Li- brary of Wuhan University of Technology, 1999(Ch).
 Li Guangyu, Wang Zhengzhong. Influence of rubber powder on the abrasion resistance of concrete [J]. China Rural Water and Hydropower, 2010, 5: 121-123(Ch).
 Fang Kun. Research on the Abrasion Resistance of Rubber Concrete [D]. Tianjin: The Library of Tianjin University 2010(Ch).
 SL350-2006. Test Code for Hydraulic Concrete [S]. Beijing: China Water Power Press, 2006(Ch).
 DL5150-2001. Test Code for Hydraulic Concrete [S]. Bei- jing: China Electric Power Press, 2001(Ch).
 Sobolev K, Flores L, Torres-Martinez L M, et al. Engineer- ing of SiO2 nanoparticles for optimal performance in nano cement-based materials [J]. Nanotechnology in Construction, 2009, 12: 139-148.