TY - JOUR N2 - The poorly cemented Ciężkowice poorly sorted sandstone and the compact Mucharz fine grain sandstone have been laboratory tested at the triaxial compressing conditions in thermo-pressurized chamber of a rigid press MTS-815. The confining pressure: P = σ₂ = gσ₃ range from 0 to 96 MPa and the temperature: T from 22°C to 120°C (simulated 500 m intervals from the surface to the depth of 3500 m). During (the) each test, the characteristics of deformation and the elastic wave velocity paths were simultaneously monitored. The volume density and longitudinal wave velocity showed a non-linear increase with the progress of simulated depth, a volume density growth by 1.6 to 4.0%, and the elastic wave velocity up to 250% of the primary value (surface condition), dependable on loading path, phase of deformation, and varying type of lithology. That may lead to wide error margin in a determination of rock’s engineering properties and also create discrepancies between the static parameters of rocks (Est, gνst) determined by standard laboratory load tests, and the dynamic parameters (Ed, νd) determined from the wave velocity and volume density. L1 - http://www.czasopisma.pan.pl/Content/83749/mainfile.pdf L2 - http://www.czasopisma.pan.pl/Content/83749 PY - 2011 IS - No 1 EP - 85 KW - great depth KW - high pressure KW - temperature KW - volume density KW - longitudinal wave velocity KW - sandstones KW - triaxial tests A1 - Pinińska, J. A1 - Dziedzic, A. PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES DA - 31.03.2011 T1 - Volume Density and Longitudinal Wave Velocity Changes of the Ciężkowice and Krosno Flysch Sandstones Under High Pressure and Temperature in the Triaxial Test Condition SP - 73 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/83749 T2 - Archives of Civil Engineering ER -