【摘 要】
：
Reactive powder concrete(RPC) is an new kind of high-performance cement based material. In order to systematically study dynamic mechanics character of reac
【机 构】
：
NorthwestInstituteofNuclearTechnology,Xi’an,Shanxi710024,China
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Reactive powder concrete(RPC) is an new kind of high-performance cement based material. In order to systematically study dynamic mechanics character of reactive powder concrete, impact compression experiments and impact flattened Brazilian disc specimens ofRPC have been investigated with modified split Hopkinson pressure bar (SHPB) experimental facility using brass pulse shaper, curve about stress versus strain and other parameter at strain rates of 20.3/s一 137.0/s is obtained from impact compression. The dynamic tensile strength and tensile failure strain at strain rates of3.4/s-26.2/s is obtained from impact flattened Brazilian. For comparison, the quasi-static compress and split tension of RPC are obtained with an MTS 810 materials test system and CSS-88500 electron universal material testing machine.The experimental result show that dynamic compression strength，elastic modulus and failure strain, dynamic tensile strength and failure strain significantly increase comparing to quasi-static experiment,RPC have the character of impact harding and ductility enhancement. RPC exhibit excellent failure patterns at high strain rate. The RPC specimen remained their integrity at the strain rate at which the matrix concrete specimens will crushed completely. Whether impact compression or impact splitting under strain rate including this paper s experiments, the relationship between the DIFC or DIFT and the logarithm of strain rate is linear.
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