Characterisation of Basic Properties of Mineral Binders with Calcined Water Treatment Sludge

Abstract

The paper discusses basic properties of mineral binders containing calcined water treatment sludge (WTS). The supplementary waste material was dried at 105°C and subjected to calcination at high temperatures of 400, 600 and 800°C for a constant time. Chemical composition was determined and pozzolanic activity was measured using the Chapelle test. Moreover, standard consistency, setting time and mechanical properties of cementitious binders containing 25% and 50% of calcined sludge were determined. The test results presented indicate that water treatment sludge calcined at 800°C exhibits high pozzolanic activity and can be considered a promising ingredient of cement-based mineral binders.