Abstract
A compacted benntonite−sand mixture containing gravel has been developed for use as an impervious material. For the purpose of understanding a compacted benntonite−sand mixture containing gravel, the authoes investigated the effects of gravel content, bentonite content, maximum grain size, water content.
Laboratory tests have shown that the permeability of bentonite-sand mixture containing gravel is lower than that of a similar material which does not contain gravel. The coefficient of permeability of bentonite-sand mixtures, k, has a significant correlation with effective bentonite wet density (initial wet density of bentonite excluding gravel and sand portions). This method could also be applied to estimating the permeability of mixtures including bentonite.
