Alternative Employment of Crushed Shell Particles in Capillary Barrier of Soil
Keywords:Capillary barrier, Water retention capacity, Crushed shell particles, Fishery byproduct waste
Capillary barrier is a tilting soil layer system which is composed of a finer soil layer underlain by a coarser soil layer. Water which infiltrates into the soil is suspended just above an interface between the soil layers and diverted downward along the interface, with the result that a vertical movement of water into deeper soil layers below the interface stops within some length along the interface. As the water diversion in the capillary barrier is caused by a sharp contrast in water retention capacity between the finer and coarser soils, any material which can provide the sharp contrast in water retention capacity can be alternatively employed in the capillary barrier system. In the study a coarse-grained material of crushed shell particles is selected as an alternative candidate for the lower layer soil of the capillary barrier, and its water retention capacity is measured to examine a practical effectiveness of the crushed shell particles in the capillary barrier system.