Strength of cement grout plugs in salt

Date

1991-01-01

Author

Akgün, Haluk

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Design of plugs for abandonment of boreholes and shafts may be governed by the bond strength between the plug and host rock. This paper presents the results of push-out tests on cement grout plugs in salt. Two expandable cement grouts have been tested. The average interface shear strengths ranged from 2 to 12 MPa. Peak shear stresses at failure, assuming an elastic stress distribution along the interface, were up to eight times higher. Standard deviation commonly reached 20%. Dissolution along the interface was observed, and may have been enhanced by clay inclusions in the salt. This dissolution appears to have reduced bond strengths. Application of the results to the design of plugs for larger openings (e.g. shafts, drifts, or boreholes) is discussed.

Subject Keywords

Aquifers - protection, Grouting - mechanical properties, Radioactive wastes - geological repositories, Stresses - analysis, Water resources - salt water intrusion

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0025903046&origin=inward
https://hdl.handle.net/11511/72485

Conference Name

1991 SME Annual Meeting (25 - 28 Şubat 1991)

Collections

Department of Geological Engineering, Conference / Seminar

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Citation Formats

H. Akgün, “Strength of cement grout plugs in salt,” Denver, CO, USA, 1991, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0025903046&origin=inward.