COMPRESSIVE STRENGTH OF SLAGS AS A RATE OF THEIR HYDRAULICITY

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 51-56 pp

ABSTRACT
Hydraulicity is the property of a binder to harden in contact with water. This property is
usually associated with lime or cement. Hydraulicity is produced by burning a limestone
containing silica, alumina and iron oxides which above certain temperatures combine
totally or partially. There are a lot of factors that can influenced the hydraulicity
(chemical composition, temperature, pressure and grain size etc.). In this contribution
the influence of chemical composition four kinds of metallurgical slags (blast furnace
slag granulated and gravel and cupola furnace slag granulated and gravel) on
compressive strength of slags were obtained. Theoretical hydraulicity of all slags was
reated. Experimental hydraulicity was evaluated as a compressive strength of samples of slag after 1, 2, 24 48 hours, after 7, 14 , 21 and 28 days. Theoretical hydraulicity of all slags was low, the highest value achieved blast furnace slag – granulated, the lowest cupola furnace slag – granulated. The highest experimental hydraulicity in the very short time achieved blast furnace slag –gravel and samples from granulated cupola furnace slag was disintegrated after 46 hours.

Keywords: blast furnace slag, cupola furnace slag, hydraulicity, compressive strength