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Test Apparatus

By Earthquake Hazards Program

Triaxial Machines

Machine Axial Stress (MPa) Pc (MPa) Pp (MPa) Temp (°C) Displacement Rate (µm/s) Sample Dimensions
1 1100 500 200 Can add .001 to 50 3”
2 None 500 200 Can add .001 to 50 3”
3 1800 700 200 600 .001 to 20 1”
4 1800 600 200 600 .001 to 20 1.5”
5 1800 700 200 600 .001 to 20 1”

Other Machines

Machine Normal Stress (MPa) Displacement Rate Shear Loading Rate Sample
Rotary 0.4 1 µm/s to 1 m/s   15”
Direct Shear 150 .001 to 1000 µm/s   3”
2 meter press 8   .00001 to .01 MPa/s 1.5 x 1.5 m