Centrifuge modeling was used to investigate the effect of colloidal silica treatment on the liquefaction and deformation resistance of loose, liquefiable sands during centrifuge in-flight shaking. The ability to uniformly introduce colloidal silica grout to the model was investigated. Loose sand was successfully saturated with 6 weight percent colloidal silica grout and subsequently subjected to two shaking events to evaluate the response of the remediated sand layer. The treated soil did not liquefy during either shaking event. Significantly lower levels of strains were measured for the treated centrifuge models compared to the strains recorded in similar centrifuge tests done on untreated soil models.
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