DefinePK

Abstract

This is paper studies the effect of using dye residue (DR), as a partial replacement of cement, on some properties of cement. The main compound composition of cement, the setting times, drying shrinkage and soundness of cement were the main focus of the paper. DR-cement pastes containing 10, 20, 30, 40, and 50 percents of DR as partial replacement of cement together with cement paste (with zero percent DR) as control were prepared. Results of the investigations carried out show that the use of DR as a partial replacement of cement increased the percentage composition of tricalcium aluminate (C3A), and dicalcium silicate (C2S) in the resulting mixture from 10.83% to 15.18% and 16.35% to 80.00% respectively for 50% DR but decreased that of tetracalcium aluminoferrite (C4AF) and tricalcium silicate (C3S) in the mixture from 9.12% to 5.26% for 50% DR and 54.10% to 0.80% for 20% DR. It also increased both the initial and final setting times of the DR-cement mixtures from 105 minutes to 165 minutes and 183 minutes to 243 minutes, respectively at DR content of 20%. The use of DR as a partial replacement of cement was found to be effective in reducing the drying shrinkage of the resulting DR-cement mixtures and is capable of removing unsoundness in cement.