Abstract:

Rubber mixed with soil are applicable in lightweight fills for slopes, retaining walls, and embankments, utilizing it as a kind of seismic isolation material in base isolation, and see if it can produce fine seismic isolation effect. This paper researches on the dynamic properties of granulated rubber-sand mixtures from the angle of base seismic isolation. The dynamic shear modulus of the different proportions of the mixtures under different consolidation pressures were measured using cyclic simple shear test. And the curves of G-? (where G is shear modulus, ? is shear strain) were obtained and compared. Results show that the granulated rubber can efficiently reduce the dynamic shear modulus of the rubber-sand mixture, which increases with the increase of the consolidation pressure.

Key words: rubber, sand, dynamic shear modulus, seismic isolation