Abstract :
In this study, cement additives are developed
by substituting granulated blast furnace slag and
steel slag (SS) with the mixture of clinker–plaster.
Mortar specimens of cement are prepared with these
additives. Measurable properties of the series of
cement additives such as the fineness moduli, Blaine
values and specific gravities are computed before the
casting. The Vicat setting times of specimens are
determined according to the terms stated in TS EN
196-3 and the changes in their expansion levels are also
detected. Furthermore, the cements produced and the
mortar specimens casted are undergone thermal processes
at the temperatures of 20, 100, 200, 300, 400, 500,
600, 700 and 800 C, and mechanical and physical
experiments are carried out for each series after the
thermal processes. In all the series, sudden losses in
strength are observed during the thermal process
beyond 600 C. Consequently, M3a series specimens
that are produced with 80% clinker and gypsum in
12% blast furnace slag and 8% SS yield the best results
in terms of compressive strength, elasticity modulus
and decomposition.
