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A robust experimental technique to measure the shock response of compacted granular materials is demonstrated. The Hugoniot curve for a quasi-statically compacted soil (∼14% porous) is presented in the stress range 0.7–4.3 GPa and compared to that of similar un-compacted materials. The soil investigated was a mixture of silt and sand in a 2:1 ratio by volume, with compacted density 2290±40 kg m-3. The Hugoniot data was generated using a plate-impact reverberation technique similar to that used by other authors. [ABSTRACT FROM AUTHOR]

The shock response of geological materials is of interest to many industries, in particular oil and gas exploration. The porous inhomogeneous composition of geological materials complicates characterisation under dynamic loading. The behaviour of dry limestone has been investigated under the condition of uniaxial strain using a plate impact facility. Manganin gauges were used to measure both longitudinal and lateral stresses within the limestone. The Hugoniot and shear data obtained are compared with that available in the open literature. [ABSTRACT FROM AUTHOR]

Porous and granular materials are widely found in a number of environments. One of the most important groups both geographically and in the construction industry are the sands. A review of the response of sand (42% porous) over a wide range of strain rates is presented. Factors such as water content and density variation are addressed. In addition a very low-density silica dust (95% porous) is also discussed in relation to its contrasting behaviour. [ABSTRACT FROM AUTHOR]