Free lime prediction

Variations in predicted 28-day mortar strength among cement producers led Moir (1997) to study the burnabilities of kiln feeds from 15 cement plants in the laboratory, using a horizontal programmable tube furnace. An equation to calculate the temperature required for 1% free lime was given as ... 

When the sintering data for ceramic matrices with controlled amounts of rigid inclusions are compared with the predictions of the rule of mixtures, drastic deviations are found, particularly for polycrystalline powder matrices. Figure 11.15 shows the sintering data for a polycrystalline ZnO powder matrix (particle size —0.4 xm) with different amounts of coarse, inert SiC inclusions (size = 14 p.m) (26). The inclusions severely reduce the densification of the composite relative to that for the free ZnO matrix, and for inclusion volume fractions v, greater than —20 vol%, densification is almost completely inhibited. Data for a soda-lime glass powder (particle size = 4 pim) containing controlled amounts of coarse, inert SiC inclusions (particle size = 35 p.m) are shown in Fig. 11.16 (27). The... 

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