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Tensile Strength of Rock

Tensile strength Te  is 20 to 30x smaller than the strength of the rock in simple compression σc.

Strength in simple tension To for selected intact rocks [MPa]

Basalt

3 - 18

Gneiss

7 - 16

Granite

11 - 21

Limestone

3 - 5

Marble

7 - 12

Quartzite

4 - 23

Sandstone

5 - 11

Schist

5 - 12

Slate

2 - 17

Tuff

2 - 4

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