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Advances in Civil Engineering
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2020
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Article
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Tab 2
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Research Article
Evaluating Long-Term Strength and Time to Failure of Sandstone with Different Initial Damage
Table 2
Values of the initial damage variable for different specimens.
Initial damage state
Unloading stress (MPa)
Value of initial damage
D
1
25.5
0.036
D
2
31.4
0.227
D
3
35.3
0.383
D
4
38.4
0.505