Geology Reference
In-Depth Information
Unconfined compressive strength (MPa)
1
-5 0. 1
10
100
Very Weak
Weak
Mod Weak
Mod Strong
Strong
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
UCS
IS(50)-->UCS
Figure B5-1.4 Typical UCS data from Simsima Limestone (courtesy of Karim
Khalaf, Fugro, Middle East).
critically. If laboratory test samples contain
flaws such as discontinuities, then measured intact strength
may be too low. Of course, at the mass scale, the
flaws and joints will be extremely important but their
contribution cannot be properly assessed by their random occurrence and in
uence on laboratory test
results.
 
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