Geotechnical characteristics of stabilised aged biosolids

Abstract

Stockpiles of air-dried sludge from wastewater treatment plants, known as biosolids, are constantly increasing worldwide. This subsequently adds to the urgency of stabilising biosolids in an effort to convert them into a suitable construction material for use in engineered fills. This paper reports the result of a laboratory testing programme on biosolids stabilised with two types of waste materials, namely, bauxsol and fly ash. The biosolids collected from the Western Treatment Plant in Melbourne were stabilised in different ratios and tested to determine their compaction, strength, permeability and deformation characteristics. Both static and dynamic compaction methods were used in the pre..