Mining Engineering > GATE 2026 > Rock Mechanics - Slake Durability Index
In a Slake Durability Index (SDI) test, a rock sample of 500 g undergoes two standard cycles of wetting and drying. The mass of the sample retained after the test is 400 g. The SDI of the sample, in %, is
A
10
B
40
C
20
D
80

Correct : d

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slake durability index test SDI calculation wetting drying cycles mining engineering gate rock sample mass change GATE Mining Engineering 2026 SDI percentage calculation wetting drying SDI rock sample SDI test

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