WEB-REPORT
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Group 1-42
Project Title Investigating the use of eggshell and mussel shell as aggregates in concrete
Synopsis

Along with the increase in world population, the amount of food waste
generated has been increasing and it is important to find ways to
recycle these wastes. Eggshell and mussel shell are common wastes
which are often being disposed. This study proposes the use of
eggshell and mussel shell as partial replacement of sand in the
production of concrete. Sand was replaced from 10% to 30% by both
types of shell in the making of concrete. The replacement of sand
by 10% to 30% of eggshell results in a decrease in flexural
strength of concrete. For mussel shell, replacement level
of 30% leads to a decrease in flexural strength. No significant
decrease in flexural strength was observed when the replacement
level was 10% and 20% mussel shell. Concrete with 10% mussel shell
replacement was found to have the greatest flexural strength.
Hence, concrete modified with 10% mussel shell was most promising
and further tests were conducted on it. When subjected to a
temperature of 45°C, the concrete with 10% mussel shell behaved
in a similar manner as the unmodified concrete with no noticeable
difference in the decrease in strength. This finding suggests
that the modified concrete is suitable to be used in countries
such as Singapore where the day temperature is high.
Water absorption tests show that the concrete modified
with 10% mussel shell absorbs less water than the unmodified concrete.
Hence it is suitable to be used in pavements which are exposed to rain.
Mussel shell can be successfully used as a partial replacement of
sand in the making of concrete. The concrete with 10% mussel shell
has great potential to be further developed into building materials.

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Team Members
(Names & Classes)
Group Leader:
WONG LU YONG, JONAVAN 4S3
 
Group Member/s:
ANSEL BRYCE TAN JUN YING 4S3
DYLAN ONG JUN JIE 4S3