The split Hopkinson pressure bar (SHPB) testing with diameter 40 mm was used to investigate the dynamic mechanical properties of engineered cementitious composites (ECCs) with different fly ash content.The basic properties including deformation,energy absorption capacity,strain-stress relationship and failure patterns were discussed.The ECCs showed strain-rate dependency and kept better plastic flow during impact process compared with reactive powder concrete (RPC) and concrete,but the critical compressive strength was lower than that of R-PC and concrete.The bridging effect of PVA fiber and addition of fly ash can significantly improve the deformation and energy absorption capacities of ECCs.With the increase of fly ash content in ECCs,the static and dynamic compressive strength lowered and the dynamic increase factor enhanced,Therefore,to meet different engineering needs,the content of fly ash can be an important index to control the static and dynamic mechanical properties of ECCs.
参考文献
| [1] | Tai, YS .Uniaxial compression tests at various loading rates for reactive powder concrete[J].Theoretical and Applied Fracture Mechanics,2009(1):14-21. |
| [2] | D.P. DIAS;C. THAUMATURGO .Fracture toughness of geopolymeric concretes reinforced with basalt fibers[J].Cement & concrete composites,2005(1):49-54. |
| [3] | G. Fischer;Victor C. Li .Effect of fiber reinforcement on the response of structural members[J].Engineering Fracture Mechanics,2007(3):258-272. |
| [4] | Q.M. Li;S.R. Reid;H.M. Wen;A.R. Telford .Local impact effects of hard missiles on concrete targets[J].International journal of impact engineering,2005(1/4):224-284. |
| [5] | Zhi-Liang Wang;Yong-Sheng Liu;R.F. Shen .Stress-strain relationship of steel fiber-reinforced concrete under dynamic compression[J].Construction and Building Materials,2008(5):811-819. |
| [6] | D.L. Grote;S.W. Park;M. Zhou .Dynamic behavior of concrete at high strain rates and pressures: I. experimental characterization[J].International journal of impact engineering,2001(9):869-886. |
| [7] | Kraiwood Kiattikomol;Chai Jaturapitakkul;Smith Songpiriyakij .A study of ground coarse fly ashes with different finenesses from various sources as pozzolanic materials[J].Cement & concrete composites,2001(4/5):335-343. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%