ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 25 October 2011
Page Count: 19

Dynamic Behavior of Sand/Rubber Mixtures. Part I: Effect of Rubber Content and Duration of Confinement on Small-Strain Shear Modulus and Damping Ratio

Anastasiadis, Anastasios
Aristotle Univ.,

Senetakis, Kostas
Aristotle University of Thessaloniki,

Pitilakis, Kyriazis
Aristotle Univ.,

Gargala, Chrysanthi
Aristotle Univ.,

Karakasi, Iphigeneia
Aristotle Univ.,

(Received 7 December 2010; accepted 27 September 2011)

Abstract

The paper examines the small-strain dynamic properties of mixtures composed of sandy soils with recycled tire rubber. For this purpose, the experimental results stemming from a torsional resonant column testing program on twenty four [24] saturated and dry specimens are analyzed. The percentages of rubber used range between 0 and 35 % by mixture weight. G_O values increase whereas DT_O values decrease systematically as the content of rubber decreases and the mean confining pressure increases. Based on the experimental results we propose an analytical relationship for the estimation of G_O, which is expressed in terms of an equivalent void ratio that considers the volume of rubber solids as part of the total volume of voids, along with an analytical relationship for the estimation of DT_O. Finally, the effect of the specimen’s size and the duration of confinement on the initial shear modulus and damping ratio of the mixtures are also discussed.

Keywords:
shear modulus, damping ratio, resonant column testing, sand/rubber mixtures

Paper ID: JAI103680
DOI: 10.1520/JAI103680
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