Use of Sludge from Drinking Water Purification in the Production of Effective Ceramic Articles

Abstract

The results of research on the use of sludge produced in the process of purification of drinking water (SPDW), which contains about 68% Fe₂O₃, as an additive in the production effective ceramic articles are presented. SPDW was added in amounts 40 – 60% into the batch for the production of effective ceramic articles; the firing temperature of the ceramic articles was 900, 1000, and 1050°C. The investigations showed that the addition of SPDW affects the properties of ceramic samples as follows: it lowers the density, strength in compression, and thermal conductivity and increases porosity. SPDW is a natural pigment that imparts a darker red color to the ceramic.