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Volume 14 article 388 pages: 345-350
The aim of this
research work is to investigate the optimum replacement of cement by silica fume
and fly ash and to calculate the compressive strength of concrete. The cement
has been replaced by fly ash and Silica fume varying in different percentage
like 0%, 10%, 20%, 30%, 40% and 50% by weight of cement. Concrete specimens of
ratios 1:2:4 and 1:1.5:3 were prepared, cured, tested and compared in term of
compressive and split tensile strength with the traditional concrete. Tests
were conducted to calculate the mechanical properties for the concrete ranging
from 7, 14 and 28 days curing both for compressive and split tensile strength.
It has been observed that the compressive strength increases when cement is
replaced 10% by Silica fume and Fly ash. However, the compressive strength is
gradually reduced when the cement replaced more than 10%. The effect of Silica fume
and Fly ash on various other concrete properties has also been investigated in
this paper. It has also been observed that the use of Silica fume and Fly ash
not only improve the various properties of concrete but could also be economical
in cost of construction.
The details of the experimental study shown in
this paper were conducted in the Structural Engineering Laboratory, Department
of Civil Engineering, Quaid-e-Awam University College of Engineering, Science
and Technology, Nawabshah. The authors are highly thankful to the students and
the laboratory staff for their cooperation in this regard.
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