Development of a new type of impervious material of final landfill with heavy metal adsorption

摘要

We are developing a new type of clay liner with heavy metal adsorption. This material consists of zeolite, doromite, hydrotalcite and sludge. These additive agents have not only cation exchange capacity but also anion exchange capacity. On the other hands, we used dehydrated cake made from sludges of the quarry. Sludge is not suitable for effective recycling and utilization. Sludge has high water content and contains many fine-grained particles. The original condition of sludge can not be used as ground materials .However we pay attention to the capability of recycling use of sludge and suggest that sludge can be effectively used for construction in order to enhance recycle use. In this study, we examined the workability and the execution management method of 2 kinds of sludge using additional agents. This study investigated the physical properties, compaction characteristics, permeability, leachate behaviour and cone index of new type of clay liner material. Especially, this paper describes the results of the examination in terms of the following four points ((1) Confirmation of trafficability, (2) Permeability properties, (3) Proposal of mechanical quality management and (4) Evaluation of long-term durability).