PENGARUH PERBANDINGAN AGREGAT HALUS DENGAN AGREGAT KASAR TERHADAP WORKABILITY DAN KUAT TEKAN BETON
ABSTRACT: Aggregates generally
occupy 70% to 80% by
volume of concrete
so it has
important influence to
concrete properties. The proportion of fine aggregate and coarse
aggregate in the concrete mix required to obtain a good combined
aggregate gradation. Good
proportion of fine
aggregate and coarse
aggregate is in accordance
with the standard
curve of the
combined aggregate gradation
as the Concrete
Mix Design Procedure. The
most important properties
of hardened concrete
is compressive strength
and the most important properties of fresh concrete
is workability. Based on these problems, the research about influence of fine
aggregate to coarse aggregate ratio to workability and compressive strength of
concrete was carried out.
The ratio of the mixture used for 1 m3 of concrete was 356 kg cement: 842
kg sand: 1093 kg split, and water cement
ratio (wcr) 0.52.
Variation of fine
aggregate to coarse
aggregate weight ratio
used is 0%:
100%, 30%: 70%, 35%:
65%: 40%: 60%,
43.5%: 56.5%, 45%:
55% , 50%:
50%, 55%: 45%,
60%: 40%, 65%: 35%, 70%: 30%, and 100%: 0%. There were
3 speci mens of each variation and the
total of specimens were 36. The samples
used in this
research were concretes
cylinder 150 mm
x 300 mm.
Concrete compressive strength
testing was carried out at 28 days concrete age.
From the results of this study, it can be concluded that reduction of
sand and addition of split can increase workability. Addition of sand and
reduction of split can decrease workability. Ratio of fine aggregate (sand) to coarse
aggregate (split) affects
the compressive strength
of concrete although
water cement ratio
(wcr) fixed. Ratio of fine aggregate (sand) to coarse aggregate (split)
affects the unit weight of the concrete.
Penulis: Arusmalem Ginting
Kode Jurnal: jptmesindd140165
