Abstract
Application of drinking water sludge to geotechnical construction is greatly anticipated for projects such as road infrastructure, but durability of the material must be evaluated. Poly-aluminum chloride, a flocculating agent contained in drinking water sludge, is expected to leache as aluminum and influence interparticle aggregation. This study investigated the compressibility and hydraulic conductivity of drinking water sludge after wet.dry processing with Al leaching using constant strain rate consolidation testing. Long-term leaching behaviors were evaluated using serial batch leaching tests. For Al release of less than 0.4 mg/kg, results show almost no influence on the compressibililty and hydraulic conductivity of drinking water sludge. The wet—dry processes corresponded to 3.16 years’ progress at an actual site.
