DETERMINATION OF THE HUGONIOT EQUATION OF STATE OF GROUT. REPORT I. 1963 TESTS.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
The emplacement of instruments in the hydrodynamic shock range of a nuclear detonation has necessitated the study of the shock characteristics of the emplacing grouts. If the Hugoniot equation of state of the grout does not match that of the surrounding medium, a mismatch will occur at the interface of the grout and surrounding medium, causing a distortion of the shock front. The Hugoniot equation of state is determined by the locus of pressure-volume points generated by shocks from a given state. The first grouts tested were hydrating cement grouts, using portland or calcium-aluminate cement they were intended to match the shock impedance of rock salt. Because of what appeared to be a low shock impedance of the hydrating cements, an epoxy-resin grout was proportioned. Two pressure-volume points were determined for this grout which showed this mixture to have a higher impedance than rock salt. Therefore, a match could be achieved by replacing some of the aggregate with a material having a lower shock impedance. This approach may offer a means of achieving shock-impedance matches of grouts with natural materials.
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