000004810 001__ 4810 000004810 005__ 20141119144555.0 000004810 04107 $$aeng 000004810 046__ $$k2002-06-02 000004810 100__ $$aVallejo, Luis E. 000004810 24500 $$aTHE ELASTIC MODULI OF SOILS WITH DISPERSED OVERSIZE PARTICLES 000004810 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference 000004810 260__ $$bColumbia University in the City of New York 000004810 506__ $$arestricted 000004810 520__ $$2eng$$aTo calculate the elastic deformations experienced by soils subjected to static or dynamic loads, knowledge of the elastic moduli is required. The elastic moduli are normally evaluated in the laboratory using conventional triaxial compressive tests on cylindrical samples. For meaningful test results, it is necessary to maintain a ratio of sample diameter to the maximum particle size of approximately 6 to 1 or greater. However some soils have large and dispersed oversize particles that make it impossible for them to be tested in the conventional triaxial apparatus. This study presents the application of a theoretical method developed by Hashin that calculates the elastic moduli of a composite made of an elastic matrix containing large dispersed particles. The Hashin method requires only knowledge of the elastic moduli of the matrix coupled with the concentration by volume of the large particles in order to calculate the elastic moduli of the mixture. The Hashin method was applied to a clay-sand mixture, and it was found to predict very well its measured elastic moduli. The measurement of the elastic moduli was carried out using an ultrasonic velocity apparatus. 000004810 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000004810 653__ $$aElastic Moduli, Soil Mixtures, Laboratory Tests, Ultrasonic Velocity, 000004810 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002 000004810 720__ $$aVallejo, Luis E.$$iLobo-Guerrero, Sebastian 000004810 8560_ $$ffischerc@itam.cas.cz 000004810 8564_ $$s1057862$$uhttp://invenio.itam.cas.cz/record/4810/files/368.pdf$$yOriginal version of the author's contribution as presented on CD, . 000004810 962__ $$r4594 000004810 980__ $$aPAPER