This is an open access article distributed under the CC BY 4.0
Volume 19 article 790 pages: 262 - 269
Self-compacting concrete (SCC) has many properties comparing to conventional concrete and represents a good
choice towards sustainability. The use of different recycled materials contributes to seize the negative impact of huge
amount of waste on the ecosystem. In this study, locally available materials have been used as partially cement
replacements. Such materials including ceramic waste powder (CWP) and glass powder (GP) in addition to fly ash
with total cement replacement of 30%(12%CWP+8%GP+12%Fly ash) have been found to increase the compressive
strength by about 7% compared to the control SCC. Normal aggregate was replaced by recycled aggregate with different
recycled aggregate which are Recycled Concrete (RC), Crushed red brick (REB) and Crushed ceramic (CER.)
The percentages of replacements are: 25%, 50%, 75% and 100%, for each type of aggregate. The results show that
the increase of the amount of recycled aggregates decreases the strength properties of SSC and effect on workability
of SSC also the result show a reduction in oven dry density. The combination of different type of recycled aggregate
shows a reduction in SSC strength. The use of fibers shows better performance of SSC compared to combination
aggregate mix without fiber but reduce the workability of SCC. However, the fiber content of 1.0% shows the best
result of the mechanical properties, whereas, fiber content up to 1.5% affects negatively on concrete properties. The
use of hybrid fiber also increases the strength properties of concrete.
The work described in this paper has been conducted in
the laboratory of Technical engineering college of Mosul.
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