Concrete is the most dominant material used in building structures in Indonesia.
Typically, concrete consists of cement, fine aggregate, coarse aggregate, and
water. With the advancement of time, the use of concrete materials has become
increasingly diverse. One such innovation is the addition of Silica Fume as an
admixture in concrete. This study aims to determine the effect of adding Silica Fume
on the compressive strength of concrete with the a target strength of 20 MPa. The
test specimens are cylindrical concrete samples with a diameter of 15 cm and a
height of 30 cm, with four variations of Silica Fume addition : 0%, 10%, 12,5%,
and 15%. Compressive strength tests were conducted on concrete, aged 14 days,
with the planned compressive strength measured at 28 days. The test results show
that the 15% Silica Fume addition exhibited the most highest increase, reaching
29,63 MPa from the planned compressive strength. In comparison. The 10%, and
12,5% variations showed increases of 24,49 MPa, and 27,02 MPa from the planned
compressive strength, respectively.