Comparative study on early impact properties of fiber reinforced geopolymeric concretes
Luo Xin1;Xu Jinyu1,2;Li Weimin1
1.Department of Airfield and Building Engineering, Air Force Engineering University Engineering College, Xi’an, China; 2.College of Mechanics and Civil Architecture, Northwest Polytechnic University, Xi’an 710072, China
Abstract：In order to make a comparative study on the effect of various fibers on early mechanical properties of geopolymeric concrete (GC). First, slag and fly ash, were used in the fabrication of GC reinforced with basalt and carbon fibers of various volume fractions, and liquid sodium silicate and sodium hydroxide were used for slag and fly ash activation. Then after 3 and 7 days standard curing, impact properties of basalt fiber reinforced geopolymeric concrete （BFRGC）and carbon fiber reinforced geopolymeric concrete (CFRGC) were investigated using a 100-mm-diameter split Hopkinson pressure bar (SHPB ) apparatus, and comparison of the experiments was analyzed. The results show that early impact properties of fiber reinforced geopolymeric concretes (FRGCs) exhibit strong strain rate dependency. Early dynamic strength properties of BFRGC are better than those of CFRGC. In the range of 10–102 s-1, BFRGC and CFRGC possess the same grade of specific energy absorption, but compared to CFRGC, the priority in energy absorption capacity of BFRGC becomes more and more prominent with increase of average strain rate. From the above comparison, it was concluded that BFRGC possesses excellent early impact properties, which can be mainly displayed by dynamic strength properties and energy absorption capacity
罗鑫;许金余;李为民. 纤维增强地质聚合物混凝土早期冲击力学性能的对比研究[J]. , 2009, 28(10): 163-168.
Luo Xin;Xu Jinyu;Li Weimin. Comparative study on early impact properties of fiber reinforced geopolymeric concretes. , 2009, 28(10): 163-168.
2009, Vol. 28 
