The Study of Periwinkle Shells as Fine and Coarse Aggregate in Concrete Works
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For a country like Nigeria and indeed the third world
countries at large, to be able to achieve a sustainable infrastructural
development particularly in the area of housing in the nearest
future, low cost building materials especially those readily available
within each geo political areas must be exploited and used to make
housing affordable for all and sundry. The inflationary trend in the
Nigeria economy escalated the cost of building materials to the
extent that many of the conventional building materials are no
longer affordable for the construction of low cost housing. This
research presents the study of the suitability of periwinkle shells as
fine and coarse aggregate in construction works. Experimental and
statistical approach was adopted in this project. Physical and
mechanical properties of periwinkle shells and crushed granite
were determined and compared. A total of sixty (60) concrete cubes
of size 150 x 150 x 150 mm with different percentages by weight of
crushed granite to periwinkle shells as fine and coarse aggregate in
order of 0%, 10%, 30%, 50% and 100% inclusion of periwinkle
shells were cast, tested and their physical and mechanical
properties were determined. Compressive strength test showed that
30% replacement of granite by periwinkle shells and 30%
replacement of sharp sand by periwinkle fine aggregate were
satisfactory without compromise in compressive strength
requirement for a mix ratio 1:2:4. Also, the cost analysis shows a
24% savings in cost when periwinkle shells are used holistically
(100%) as coarse aggregate and 6.8% savings in cost when 30% are
used to replace granite as coarse aggregate.
Keywords
TA Engineering (General). Civil engineering (General)