PENGARUH KADAR AIR AGREGAT TERHADAP KUAT TEKAN BETON
ABSTRACT: Concrete mix design
with the volume proportions are often
used because it is very easy in implementation. The volume proportion of
cement, sand, and split / gravel that often used are 1 : 2 : 3 and 1 : 1.5 :
2.5 with the specific water cement ratio (wcr). The water content of aggregate
(split / gravel and sand) in the field can be either air dry or wet. The
difference of water content on aggregate increase or decrease the water cement ratio, and
result of concrete
compressive strength also varies. Based on these issues then examined
the influence of water content of aggregate on concrete compressive strength
with the volume proportions 1: 2: 3 and 1 : 1.5 : 2.5 and with water cement
ratio 0.6. The samples that used in this research are a concrete cylinder 150
mm x 300 mm, fine aggregate of sand and coarse
aggregate of crushed stone/split and gravel. The water content of aggregate
used be varied such as: wet, saturated surface dry (SSD), and air
dry (5 variations). The number of specimens of each variation 3, and
total specimen 84. Concrete compressive strength testing performed at 28 days. From
these results obtained: a decrease water content in aggregate will decrease the
slump value in volume proportion 1 : 2 : 3 and 1 : 1.5 : 2.5. Slump value of
volume proportion 1 : 2 : 3 less than 1:
1.5: 2.5 in any condition of the water content
on aggregate. Condition of the water content on aggregate
that larger or smaller than the
SSD condition in volume proportion 1 : 2 : 3 are resulted decreased concrete
compressive strength. In volume
proportion 1 : 1.5 : 2.5 with aggregate water content greater
than the SSD resulted in decreased
concrete compressive strength
and on the condition of the water content is smaller than SSD resulted
in increased concrete compressive strength. On SSD condition, concrete compressive strength by volume
proportion 1 : 2 : 3
are almost equal to 1 : 1.5
: 2.5, while in the wet and
air dry conditions aggregate,
compressive strength of concrete with the
volume proportion 1 : 2 : 3 less than the volume proportion 1 : 1.5 : 2.5.
Penulis: Arusmalem Ginting,
Wawan Gunawan, Ismirrozi
Kode Jurnal: jptmesindd110185
