Author(s)

D. Grady

Abstract

Unique shock compression experiments have been developed and pursued which provide material equation of state data for dynamic strength, pore crush, shock Hugoniot and adiabatic decompression. Experimental data have been obtained on an aggregate concrete to Hugoniot pressures of 25 GPa. New analytic methods were developed to extract equation-of-state properties from dynamic test data. Unexpected residual strain results are compared with predictions of thermal expansion and dilatancy mechanisms in concrete. 1 Introduction Experimental shock and adiabatic release data have been determined for concrete over a shock pressure range of approximately 3-25 GPa. In the experimental method a concrete sample (disc) is mounted in a projectile and undergoes planar impact on a thin disc of metal (copper or

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