Latest Article
Hydro-Abrasive Erosion of Concrete Incorporated with Nano-SiO2, Super-Fine Slag or Rubber Powder
Time:2014-1-07  
HE Zhen, CHEN Xiaorun, YANG Huamei, CAI Xinhua
State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China
Abstract:
 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. 
Key words:concrete; abrasion resistance; nano-SiO2; super-fine slag; rubber powder
CLC number:TV 431
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