Abstract
Authors have developed a technique, called the cement-mixing and mechanical dehydration (CMD), as one of waste recycling and pollutant stabilization techniques. In order to investigate the strength properties and elution characteristics for contaminated sediments containing heavy metals, tri-butyl tin (TBT) and tri-phenyl tin (TPT), unconfined compression test and a series of elution tests were performed for contaminated sediments treated by the CMD. The main conclusions obtained form this study are as follows; 1) CMD is effective for increasing the unconfined compressive strength of contaminated sediments. 2) Heavy metals eluted from contaminated sediment treated by CMD can be satisfied with the Japanese national environmental quality standard. 3) Elution of TBT and TPT can be expressed by an exponential function of the potential of hydrogen, pH, in alkaline pH range.
