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Campina Grande, PB, Brazil

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Table I - Chemical characteristics of the CMC samples used.
Fig. 1 shows the data obtained after measurements of  rheological properties [apparent viscosity (AV), plastic  viscosity (PV), yield point (YP) and gel strength (GS)] and  filtrate volume (FV) of the samples analyzed
Table III shows the rate of filtrate volume reduction of  clay  dispersions  prepared  with  maximum  concentration        (2 g/350 mL of water) of carboxymethylcellulose in relation  to the dispersion formulated only with clay (15 g/350 mL of  water)

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