EXPERIMENTAL STUDY ON APPLICABILITY OF CRUSHED SHELL PARTICLES USING COVER SOIL OF FINAL WASTE DISPOSAL FACILITY

Abstract

 Capillary barrier is a soil layer system which is composed of a finer soil layer underlain by a coarser soil layer. The authors found that an employment of crushed shells instead of gravel in the lower layer greatly reduces transport of the finer particles in the upper layer into the lower layer, and provides an effective function of capillary barriers.
 In this study, elution amount of calcium from the crushed shells upon contact with percolating water and effect on pH value of the leachates, had become apparent from the two types of laboratory experiments. As the result, the authors was to clarify the applicability of the crushed shells to the cover soil of the final waste disposal facility et al. required long term stability.