| dc.description.abstract | Conventionally, stone and sand are considered the coarse and fine aggregates of
concrete; however, any manufactured inert material can also be used as the
aggregates. These conventional aggregates, such as stone and sand, are usually
collected from natural sources. As continued extraction of stone and sand from natural
sources results in an imbalance in the natural ingredients and affects the environment
adversely, the recent advancement of using waste materials as aggregates in concrete
production has gained momentum to create a greener environment. This study focuses
on the applicability of iron slag (a by-product of steel production) as a replacement for
conventional fine aggregate in concrete production. Primarily, physical properties of
iron slag, such as grain size distribution, dry density, specific gravity, and absorption
capacity values, were measured. Then this iron slag sample was mixed with the sand
at different doses (0%, 10%, 20%, and 30% of total fine aggregate). To observe the
effect of this blended fine aggregate (a mixture of iron slag and sand), concrete
cylindrical specimens were produced with the mixing ratio of cement fine aggregate
and coarse aggregate to be 1:1.5:2.5 and tested under compression up to failure. It was
found that the different doses of iron slag and sand yielded increased compressive
strength values of the concrete compared to a batch where only sand was used as fine
aggregate. It was also found that the different doses of iron slag and sand yielded
similar compressive strength values after heating compared to a batch where only
sand was used as fine aggregate. Therefore, it is expected that the iron slag has merits
to be used alone or in conjunction with sand as fine aggregate in producing concrete | en_US |
