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A High Alumina Concentrate From Low-Grade Burley Clay, Leonard Stearns
A High Alumina Concentrate From Low-Grade Burley Clay, Leonard Stearns
Masters Theses
"The principal source of raw material for the production of high-alumina refractories are the diaspore clays of Missouri. These highly refractory clays contain a large percentage of the mineral, diaspore, a monohydrate of alumina whose theoretical chemical formula is Al₂O₃ʺH₂O. The clays as mined contain from 85 to 65 per cent alumina...Diaspore clays as now found fill sandstone-lined "sink holes" or depressions in the parts of the district underlain by rocks of the Pennsylvanian Age. They are rough open-textured clays, grey or buff in color usually, containing the mineral diaspore in the form of shot-like particles or "oolites." There are …
Determination Of Alkalies In Portland Cement By The Dropping Mercury Electrode Method, William Joseph Smothers
Determination Of Alkalies In Portland Cement By The Dropping Mercury Electrode Method, William Joseph Smothers
Masters Theses
"In many industries whose product or products contain alkalies, the determination of the amount present is very essential from a control standpoint. This present investigation is concerned with a method for quantitative determination of sodium and potassium as accurately as by customary chemical methods and which will require less time in its operation. Portland cement is a product in which the amount of sodium and potassium present is of prime importance. This importance of the alkalies upon the behavior of concrete was first noticed in California where, after numerous tests, it was definitely shown that with certain aggregates there was …