EFFECT OF PHOSPHOGYPSUS TO THE SLAG BINDER ACTIVITY
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2017, Vol 171, Issue 5
Abstract
The ecological problem of utilization of metallurgical slags is shown. As a result of the analytical review of literature sources, there are varieties and tonnage of slags in Ukraine, their chemical composition, data on the hydraulic activity of slags of various types. The most active are granulated slags, which contain the largest amount of glass phase. The waste crystallized slags are the least active. It has been established that even the most active slag does not harden independently and requires activation. It is proposed to utilize slags by producing walled piece products, activation is carried out by a combination of mechanical activation by pressing and chemical additive of phosphogypsum. Experimental studies were carried out for the slags of the Dnieper Metallurgical Combine and phosphogypsum from the dumps in Kamensk. As a result of electron microscopic studies, it is established that the slag dross is partially hydrated, which further reduces their activity. Dependences of the physical-mechanical properties of the pressed stone on the type of slag and the amount of the phosphogypsum additive are established. The addition of 2.5 % phosphogypsum ensured a compression strength of 20 MPa sufficient for walled piece products.
Authors and Affiliations
Varvara Vinnichenko, Viacheslav Butskii, Tetiana Kostiuk, Andrii Plugin, Dimitri Braizew
Keywords
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- EP ID EP313179
- DOI 10.18664/1994-7852.171.2017.111397
- Views 65
- Downloads 0
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