Effect of radiation on topopah spring tuff mechanical properties
The effect of radiation on the mechanical properties of Topopah Spring tuff was investigated by performing uniaxial compressive tests on irradiated and control samples of the tuff from the potential repository horizon at Yucca Mountain. Test results are presented, including stress-strain curves and peak strength and Young`s modulus values. These results show that for homogeneous uncracked samples of Topopah Spring tuff, exposure to gamma radiation had no discernible effect on the unconfined partially healed subvertical caracks indicate that exposure may reduce the strength and Young`s modulus significantly. This is attributed to weakening of the cementing materials in the cracks and fractures of the samples that were irradiated. These results are preliminary, and additional studies are warranted to evaluate whether radiation weakens cementing materials in welded tuff.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 632723
- Report Number(s):
- UCRL-JC-124343; CONF-961202-; ON: DE98051362; TRN: 98:008944
- Resource Relation:
- Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1 Nov 1996
- Country of Publication:
- United States
- Language:
- English
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Unconfined compression experiments on Topopah Spring Member tuff at 22{degrees}C and a strain rate of 10{sup {minus}9} s{sup {minus}1}: Data report; Yucca Mountain Site Characterization Project
Effect of radiation on the mechanical properties of Topopah Spring Tuff