INVESTIGATION OF EFFECTS TO THE RHEOLOGICAL PROPERTIES OF ADDITIVE MATERIALS WHICH ARE USED ON CEMENT ENJECTIONS

Abstract

In this study the rheological properties of the injection mixtures containing various proportions of bentonite (B), fly ash (UK) and silica fume (SD) were investigated. L16 orthogonal array with three parameters and four levels was selected using Taguchi Design of Experiment Method. In the preparation of the injection mixtures the percentages of bentonite, fly ash and silica fume (by weight of solid) used were 0 %, 0.5 %, 1 %, 3 %, 10 %, 20 %, 30 %, 40 %, and 0 %, 5 %, 10 %, 20 %, respectively. For the prepared injection mixtures the sedimentation and Marsh funnel experiments were performed. The experiments were carried out water to solid ratios (W/S) of 1.25 and the experimental results were evaluated separately using Taguchi method. As a result of the evaluations; the most effective parameter on the flowing time (viscosity) and the amount of sedimentation was determined as the silica fume. For the investigated properties of the injection mixtures the optimum mixing ratios were determined with the Taguchi method and for these ratios the confirmation experiments were performed.

Keywords

• Uçucu kül, Silis dumanı, Bentonit, Enjeksiyon, Taguchi yöntemi