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Shear strength evaluation of clay-rock mixtures.
Iannacchione AT; Vallejo LE
Slope Stability 2000. Geotechnical Special Publication No. 101. Reston, VA: American Society of Civil Engineers, 2000 Jan; :209-223
At present, there is little knowledge concerning the shear strength of clays containing floating rock particles with concentrations from 0 to 30%. In practice, the effect of rock particles is typically disregarded in shear strength analysis. The two primary reasons for this are: 1) a lack of agreement concerning the influence of rock particles on material strength, and 2) the expense and difficulty of testing clay-rock mixtures with existing laboratory procedures. These factors have impeded the development of successful slope remediation design techniques for colluvium derived from resistant sedimentary rocks or spoil produced from surface mining. This study reviewed 31 technical papers which contain analysis of shear strengths for clay and sands with varying mixtures of rock particles. These technical papers published over the last 40 years, are comprised of field case studies, laboratory evaluations, and theoretical analysis. Evaluation of this body of knowledge has shown that the shear strength gradually increases with increasing percentages of floating particles in unsaturated clays.
Analytical processes; Analytical instruments; Case studies; Soil sampling; Soil analysis; Particle counters; Statistical analysis; Laboratory testing
Conference/Symposia Proceedings; Book or book chapter
Griffiths DV; Fenton GA; Martin TR
Slope Stability 2000. Geotechnical Special Publication No. 101
Page last reviewed: April 9, 2021Content source: National Institute for Occupational Safety and Health Education and Information Division