1. Too low an effective confining pressure may cause the cement to become ductile. 2. The tests carried out by Robertson show plasticity occurring at high confining pressures . 3. As the magma ascends towards the surface, the temperature and confining pressure decrease. 4. C'= is called dilatancy of closely packed soil particles depends on confining pressure . 5. It is observed that the higher the confining pressure , the greater the ductility observed. 6. First boiling is defined as a decrease in confining pressure below the vapor pressure of the melt. 7. To maintain an approximately static plasmoid radius, this pressure must be balanced by an external confining pressure . 8. A decrease in temperature and confining pressure will allow an increase in crystallization and vapor pressure of the dissolved gas. 9. Within depths less than 5 km, dynamic metamorphism is not often produced because the confining pressure is too low to produce frictional heat. 10. Sometimes, testing of cohesive samples is done with no confining pressure , in an "'unconfined compression test " '.
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