Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Thermal/mechanical properties of Pomona and Umtanum basalts: elevated temperature comparative triaxial test

Technical Report ·
OSTI ID:6768303
The thermomechanical behavior of Umtanum and Pomona basalt cores from the Hanford Site near Richland, Washington, is investigated. The objective of this study is to provide information relating conditions within the Pomona flow at the Near-Surface Test Facility (NSTF) to projected repository conditions within the Umtanum flow. This project included experiments to measure bulk and grain density, apparent porosity, static and dynamic elastic constants, and compressive strength under triaxial loading. All tests were performed in accordance with Rockwell-approved test procedures. In addition to comparing the properties of Umtanum and Pomona basalts, the triaxial compression test is designed to provide data for comparing the effects of heating specimens in unconfined and confined conditions and for comparing the properties of jointed and unjointed specimens. The complete testing program is outlined. All specimens were grouped in pairs. One specimen from each pair was heated to 200/sup 0/C before applying the confining pressure. For the other member of the pair, the confining pressure was applied first. Intact Umtanum specimens were not available so no specimens are listed in the intact classification.
Research Organization:
Foundation Sciences, Inc., Portland, OR (USA)
DOE Contract Number:
AC06-77RL01030
OSTI ID:
6768303
Report Number(s):
RHO-BWI-C-91
Country of Publication:
United States
Language:
English