Viscosity silicate solid content

Silicate SioUA Content Viscosity. As the silicate solids content of a bound sand body increases, the strength of the sand body also increases as shown in Fig. 4. The mold densities of all samples were held constant at 1.55-1 58 gm/cc... 

As the silicate solid content is increased in the coated sand, the strength of each junction point attains its maximum value In these higher silicate solids cases, the viscosity of the silicate solution is not a determining factor and additional water has no effect on the strength of the bound sand samples For each sand studied, and each silicate ratio investigated, there is a specific water content of the silicate solution that gives optimum strength properties ... 

The clear to cloudy, colorless aqueous solutions vary in specific gravity and viscosity. Viscosity of silicate solutions increases with the increasing solids content as well as with increasing ratio. In contrast, for any particular concentration and ratio there is a minimum in viscosity. Increases in viscosity can be rather abrupt. This is especially valid in the case of the more siliceous solutions. 

Calcium aluminate cement with a lower or intermediate AI2O3 content cannot be produced in rotary or shaft kilns of the type common in the manufacture of Portland clinker. The temperature range between incipient melting and complete fusion of the raw mixes is too narrow to permit successful clinkerization, in which a melt and solid phases must coexist. Moreover, the viscosity of calcium aluminate (-ferrite) melts is significantly lower than that of the calcium silicate-aluminate-ferrite melts formed when Portland clinker is produced. 

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