The effect of clay content on the relation between uniaxial compressive strength and needle penetration index for clay-bearing rocks
Abstract The needle penetration index (NPI) test is a non-destructive test that is applicable both in the field and laboratory, and does not require any special sample preparation. This test has been used for the estimation of physico-mechanical properties of soft rocks. In this study, the influence...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-02-01
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| Series: | International Journal of Geo-Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s40703-020-00135-y |