Large and Small Strain Properties of Sands Subjected to Local Void Increase
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 128, Issue 12
Abstract
Local strain effects are proposed as a source of shear strength reduction in cemented particulate media, shales, and heterogeneous systems. Shear strength degradation through local straining may arise from particle dissolution, double-layer shrinkage in reactive clay phases, and volume change associated with thermal processes. This study focuses on mechanical property changes produced by local straining in particulate systems made of sand–salt mixtures. Local strains were induced by the dissolution of salt particles. Large-strain properties (angle of shear resistance and dilation rate) were measured using triaxial test methods. Small-strain properties (acoustic wave velocity and attenuation) were measured with a resonant column device and piezocrystals (bender elements). Experimental data showed that large-strain properties are sensitive to changes in aggregate volume; a reduction in the angle of shearing resistance up to 26% was observed for a 90% sand–10% salt mixture after salt dislocation. Acoustic wave velocity and attenuation values changed up to 25% during particle dissolution. Fine sand–salt specimens showed smaller changes in macroscopic parameters, compared to coarse-grained specimens. Changes at the microscale assessed using small-strain measurements are clearly reflected at the macroscale as a reduction in the angle of shearing resistance. Finally, it is shown that changes in macroscale parameters produced by internal volumetric strains can be estimated by considering the change in the void ratio and assuming a random distribution of internal strains. However, small-strain parameters cannot be evaluated using the same approach because the microstructure has a stronger effect on wave propagation parameters (velocity and attenuation) than the macroscopic parameters.
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References
Aloufi, M., and Santamarina, J. C.(1995). “Low and high strain mechanical properties of grain masses—The effect of particle eccentricity.” Trans. ASAE, 38(3), 877–887.
Aggour, M. S., Tawfiq, K. S., and Taha, M. R. (1988). “Impulse and random testing of soils.” Proc., Earthquake engineering and soil dynamics II; recent advances in ground-motion evaluation, Von Thun, J. Lawrence, eds., Geotechnical Special Publication No. 20, Park City, Utah, 346–358.
Been, K., and Jefferies, M. G.(1985). “A state parameter in sand.” Geotechnique, 35(2), 99–112.
Brignoli, E. G. M., Gotti, M., and Stokoe, K. H.(1996). “Measurement of shear waves in laboratory specimens by means of piezoelectric transducers.” Geotech. Test. J. , 19(4), 384–397.
Cascante, G., and Santamarina, J. C.(1996). “Interparticle contact behaviour and wave propagation.” J. Geotech. Eng., 122(10), 831–839.
Cascante, G., and Santamarina, J. C.(1997). “Low strain measurements using random-noise excitation.” Geotech. Test. J., 20(1), 29–39.
Chang, C. S., Misra, A., and Sundaram, S. S.(1991). “Properties of granular packings under low amplitude cyclic loading.” Soil Dyn. Earthquake Eng., 10(4), 201–211.
Drnevich, V. P., Hardin, B. O., and Shippy, D. J. (1978). “Modulus and damping of soils by the resonant-column method.” Dynamic Geotechnical Testing, American Society for Testing and Materials, Special Testing Publication No. 654, Philadelphia, 91–125.
Duffy, J., and Mindlin, R. D.(1957). “Stress–strain relations of a granular medium.” J. Appl. Mech., 24(4), 585–593.
Dyvik, R., and Madshus, C. (1985). “Lab measurements of using bender elements.” Proc., Advances in the Art of Testing Soil Under Cyclic Loading, Detroit, ASCE, New York.
Fam, M., and Santamarina, J. C.(1995). “Study of complementary mechanical and electromagnetic wave measurements in an oedometer.” Geotech. Test. J., 18(3), 307–314.
Goddard, J. D.(1990). “Nonlinear elasticity and pressure-dependent wave speeds in granular media.” Proc. R. Soc. London, 430, 105–131.
Hardin, B. O., and Drnevich, V. P.(1972). “Shear modulus and damping in soils: Measurements and parameter effects.” Soil Mech. Found. Eng. (Engl. Transl.) ASCE, 98, 603–624.
Petrakis, E., and Dobry, R. (1987). “Micromechanical modeling of granular soil at small strain by arrays of elastic spheres.” Rep. No. CE-87-02, Dept. of Civil Engineering, Rensselaer Polytechnic Institute, Troy, N.Y., 90–115.
Rothenburg, L., Bathurst, R. J., and Dusseault, M. (1989). “Micromechanical ideas in constitutive medelling of granular materials.” Powders and Grains, J. Biarez and R. Gourvès, eds., A. A. Balkema, Rotterdam, The Netherlands, 355–363.
Sanchez-Salinero, I., Roesset, J. M., and Stokoe, K. H., II. (1986). “Analytical studies of body wave propagation and attenuation.” Rep. No. GR-86-15, Geotechnical Engineering, Univ. of Texas at Austin, Austin, Tex., 79–137.
Santamarina, J. C., and Cascante, G.(1996). “Stress anisotropy and wave propagation: A micromechanical view.” Can. Geotech. J., 33(5), 770–782.
Santamarina, J. C., and Fam, M.(1997). Discussion of “Interpretation of bender element tests.” Geotechnique, 47(4), 873–875.
Thomann, T. G., and Hryciw, R. D.(1990). “Laboratory measurement of small strain shear modulus under conditions.” Geotech. Test. J. , 13(2), 97–105.
Viggiani, G., and Atkinson, J. H.(1995). “Interpretation of bender element tests.” Geotechnique, 45(1), 149–154.
Viggiani, G., and Atkinson, J. H.(1995). “Stiffness of fine-grained soil at very small strains.” Geotechnique, 45(2), 249–265.
Wolf, K. H., and Chilingarian, G. V. (1975). “Diagenesis of sandstones and compaction.” Compaction of coarse-grained sediments, II, Chilingarian and Wolf, eds., Elsevier, New York.
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Copyright © 2002 American Society of Civil Engineers.
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Received: May 24, 1999
Accepted: Mar 29, 2002
Published online: Nov 15, 2002
Published in print: Dec 2002
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