Mechanical and acoustic properties of weakly cemented granular rocks

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This paper presents the results of laboratory measurements on the mechanical and acoustic properties of weakly cemented granular rock. Artificial rock samples were fabricated by cementing sand and glass beads with sodium silicate binder. During uniaxial compression tests, the rock samples showed stress-strain behavior which was more similar to that of soils than competent rocks, exhibiting large permanent deformations with frictional slip. The mechanical behavior of the samples approached that of competent rocks as the amount of binder was increased. For very weak samples, acoustic waves propagating in these rocks showed very low velocities of less than 1000 m/sec for ... continued below

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Nakagawa, S. & Myer, L.R. May 9, 2001.

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This paper presents the results of laboratory measurements on the mechanical and acoustic properties of weakly cemented granular rock. Artificial rock samples were fabricated by cementing sand and glass beads with sodium silicate binder. During uniaxial compression tests, the rock samples showed stress-strain behavior which was more similar to that of soils than competent rocks, exhibiting large permanent deformations with frictional slip. The mechanical behavior of the samples approached that of competent rocks as the amount of binder was increased. For very weak samples, acoustic waves propagating in these rocks showed very low velocities of less than 1000 m/sec for compressional waves. A borehole made within this weakly cemented rock exhibited a unique mode of failure that is called ''anti-KI mode fracture'' in this paper. The effect of cementation, grain type, and boundary conditions on this mode of failure was also examined experimentally.

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OSTI as DE00799643

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  • 38th American Rock Mechanics Association Symposium, Washington, DC (US), 07/08/2001--07/10/2001

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  • Report No.: LBNL--50814
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 799643
  • Archival Resource Key: ark:/67531/metadc741566

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  • May 9, 2001

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  • Oct. 19, 2015, 7:39 p.m.

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  • April 4, 2016, 1:36 p.m.

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Nakagawa, S. & Myer, L.R. Mechanical and acoustic properties of weakly cemented granular rocks, article, May 9, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc741566/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.