Hydro-Abrasive Erosion of Concrete Incorporated with Nano-SiO_2, Super-Fine Slag or Rubber Powder  

作　　者：HE Zhen CHEN Xiaorun YANG Huamei CAI Xinhua 

机构地区：[1]State Key Laboratory of Water Resource and Hydropower Engineering Science, Wuhan University

出　　处：《Wuhan University Journal of Natural Sciences》2013年第6期535-540,共6页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Basic Research Program of China(973 Program)(2009CB623201 and 2013CB035901);the National Natural Science Foundation of China(50972109 and 51109170);the Doctoral Program of Higher Education of China(20090141110021)

摘　　要：In this paper, we investigates the concretes respec- tively incorporated with 5% （m ： rn） nano-SiO2 （NS）, 40% （rn ： 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.In this paper, we investigates the concretes respec- tively incorporated with 5% （m ： rn） nano-SiO2 （NS）, 40% （rn ： 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.

关 键 词：CONCRETE abrasion resistance nano-Si02 super-fineslag rubber powder 

分 类 号：TV431[水利工程—水工结构工程]