Abstract:A series of consolidated undrained tests are conducted to explore the influence law of the rubber content XC, particle size ratio of rubber and sand d50, r/d50, s, relative density Dr and confining pressure σ3 on the initial deformation modulus of rubber particle-sand mixture. The test results show that the initial deformation modulus of the rubber-sand mixture decreases exponentially with the increase of XC. The smaller d50,r /d50,s, the more obvious attenuation of the initial deformation modulus by the addition of rubber particles. The initial deformation modulus increases with the increase of Dr and σ3. The larger Dr, the slower growth rate of the initial deformation modulus. Fitting the initial deformation modulus according to Janbu's empirical formula, it is found that the parameter K decreases with the increase of rubber content. The parameter n fluctuates less when the rubber content is small, and the dispersion increases when the rubber content exceeds 30%. Finally, a normalized prediction formula for the initial deformation modulus of the rubber-sand mixture is proposed.
Key words: rubber particle-sand mixtures; consolidated undrained test; initial deformation modulus; prediction formula
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