Possible use of biosolids in fired-clay bricks

摘要: Abstract In Australia, thousands of tonnes biosolids are produced annually and millions dollars expended on their management. Biosolids derived from wastewater sludge, which is the major solid component collected treatment process. This paper presents some results a study concerning use in fired-clay bricks. The geotechnical characteristics three samples stockpiles Eastern Treatment Plant (ETP) Melbourne were investigated to assess suitability as partial replacement material for clay classification tests including liquid limit, plastic limit sieve analysis indicated that clayey sand poorly graded silty sand. linear shrinkage varied 10% 15% organic content 6% 14%. Control bricks with 0% clay–biosolids 25% by weight made properties compressive strength, shrinkage, density, Initial Rate Absorption (IRA), water absorption determined whereas thermal conductivity was estimated an empirical model. Furthermore, effect adding microstructure evaluated scanning electron microscopy (SEM). showed strength 25.9, 17.4 16.2 MPa different used study. mainly because addition content, resulted fired-bricks higher apparent porosity thus lower density strength. control 36.1 MPa.