Rheological Characteristics of Fly Ash Slurry at Varying Temperature Environment with and without an Additive

Transportation of fly ash is a major problem in its efficient disposal. The main problem associated with fly ash transportation is that the particles settle down sooner than desired. The primary objective of this investigation is that not only the fly ash particles should remain floated till it reaches the end but also settle down after that. As a part of the research program, the slurry concentration was kept at 30% (by weight). Rheological tests were conducted using Advanced Computerized Rheometer. Fly ash slurry was prepared using ordinary tap water. Zeta potential was measured to test the stability of the colloidal fly ash particles using Malvern Zeta Sizer instrument. Surface tension was also measured to know the drag reduction behavior of the fly ash slurry by using Surface Tensiometer. The rheological behavior of the fly ash slurry was determined at varying temperature environment with and without an additive. Cetyltrimethyl Ammonium Bromide (CTAB) concentration of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% (by weight) was used as an additive with equal amount of a counter-ion (Sodium Salicylate). The test results and flow diagrams are generated using Rheoplus software and are presented in this paper. Suitable discussions and conclusions are made based on the research findings.