In order to investigate the effects of the grain size distribution and the micro-structure of soils on the mechanical characteristics, some static triaxial compression tests were carried out, and then the relationship of stress-strain and the strength behavior of silty sand were compared among undisturbed samples with different grain size distribution, undisturbed and remolded samples with the ...

The dynamic compression deformation of 3 µm, 15 µm and 25 grain size ZK60 alloys under high-strain-rate is systematically studied. Dynamic experiments at a strain rate 1700 s−1 were conducted using split Hopkinson pressure bar, the microstructure specimen was characterized via electron backscatter diffraction transmission microscopy, as well calculation Schmid factors. results showed that alloy...

The relationship between textural properties of selected Nigeria rocks and penetration rate of top-hole hammer drill was investigated. These rock samples were tested in the laboratory for mineral composition, silica content and porosity. Also, average grain size and packing density were determined from photomicrograph of the samples using empirical equations proposed by researchers. Penetration...

in this study we report the rock magnetic properties of surface soil samples and their spatialvariability from the northernmost district of kerala to understand pedogenic processes and soil erosion. themagnetic signal is mainly from fine grained pedogenic magnetite as other sources like anthropogenic andlithogenic magnetite, bacterial magnetite and greigite are absent. the surface soil samples ...

Microstructures of rocks play an important role in determining the rheological properties and usually help to reveal the processes that lead to their formation. Several processes can be active during the formation of a rock and they may be active simultaneously or in series. Some processes change the microstructure significantly and may obliterate any fabrics that indicate the previous history ...

Grain size effect on rock strength is a topic of great interest in geotechnical engineering. A consensus obtained from earlier laboratory tests that generally decreases with the increase grain for both silicate and carbonate rocks; however, some recent numerical results conflict such test results. To address this intriguing issue, polymineralic crystalline low porosity investigated numerically ...