Effect of Sodium lignosulphonate-based Cement Retarder on the Free Fluid Property of Cement Slurry

This study was carried out using API recommended practice 13B-2 in a cement laboratory, and the essence was to establish the effect of sodium lignosulphonate-based retarder on the free fluid of cement slurry.The test was carried out at different temperatures of 80oF and 100oF and retarder concentrations of 0.01 gal/sk, 0.03gal/sk, 0.05 gal/sk, 0.07 gal/sk, 0.09 gal/skand 0.10 gal/sk. The test results obtained showed thefree fluid of sodium lignosulphonate-based retarder at concentrations of 0.01gal/sk, 0.03gal/sk, 0.05gal/sk, 0.07gal/sk, 0.09gal/sk and 0.10gal/skwere 0.8%, 1.2%, 1.46%, 1.75%, 1.92% and 2.12% at 80oF respectively; similarly at 100oF the free fluid were 0.79%, 1.21%, 1.56%, 1.72% 1.91% and 2.22%.The results it meant that concentration play a major role in adjusting the free fluid property of cement slurry while temperature has no significant effect on it.