Wetting Cumulative , Volumes

The effect of UPF is verified by observing the similar pore size distributions of the wet granulation and the direct compression tablets in Frogerais, after 25% of the cumulative volume. 

Figure 10.6 Cumulative volume size distributions for the SRM 114p cement powder for wet (LAS-W) and dry LD (LAS-D) methods. (Reprinted from Ferraris, C. F. et al.. Cement, Concrete and Aggregates, 26(2), l-l I, 2004. With permission.)...

The time vs. suspension-supernatant interface height data shown in Table 5.3 were obtained from ajar sedimentation test using a one litre measuring cylinder with an inside diameter of 6.5 cm. The supernatant clarity was good. The time vs. cumulative filtrate volume data shown in Table 5.4 were obtained from a leaf filter (Buchner) test using a vacuum of 70 kPa. The filter leaf had an area of 38 cm, and the final masses of wet and dry cake were 197 g and 128 g respectively. The final cake height was estimated to be 3.1 cm. Both tests were performed in accordance with the recommendations shown in Chapter 4. 

The volume flow for the wet run, Jy > and for the dry one, /y, versus the applied pressure, allows evaluation of several statistical parameters [91-95]. From these data, the cumulative and differential distributions of relative number of pores and flow ean be obtained. If the absolute number of pores and porosity are to be evaluated, a model for the gas flow through the pores must be assumed. 

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