Magnesia Binder Preparation from Local Natural and Technogenic Raw Materials

Abstract

The preparation of magnesia binders based on natural and technogenic mineral was the result of the research. The obtained magnesia binders possess the increased flexural and compressive strength which values are close to ones of natural materials. High flexural and compression strengths are associated with the features of the hardened caustic dolomite containing magnesium oxyhydrochlorides which crystallize as a fiber. The fibrous crystals not only increase the cement strength, but also act as a reinforcing material. The resulting magnesia binder does not require a moist environment at hardening. It is characterized by decorativeness and ecological compatibility, has a neutral hardening product composition

Foam Glass Lightened Sorel’s Cement Composites Doped with Coal Fly Ash

“…0.012% of natural potassium, and low concentration of potassium in MOC-GF mixtures (maximum 4 g of natural potassium, which represents~0.0005 g of radioisotope 40 K), the use of fly ash in the composition of the researched composites does not represent any problem for their natural radioactivity. Moreover, as reported, e.g., in [34,59], the MgO radioactivity is almost negligible compared to that of Portland cement. In the caustic magnesia used in this work, no potentially radioactive elements were detected.…”