Update Artikelilmiah: 18004

KRISNA MAHARANDI WIJAYA

NIM

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Abstrak (Bhs. Indonesia)

Melihat banyaknya infrastruktur yang direncanakan oleh pemerintah
terutama dalam bidang keairan, maka dari itu penggunaan struktur beton bertulang
pada daerah agresif atau yang selalu terkena air laut sangat berisiko terhadap
terjadinya korosi pada tulangan akibat adanya infiltrasi dari unsur garam pada air
laut, Untuk mengurangi resiko korosi tulangan maka beton dibuat sekedap
mungkin terhadap air. Untuk itu dilakukan penambahan superplasticizer & calcium
stearate ke dalam beton untuk mengurangi tingkat absorbsinya. Superlasticizer
yang digunakan adalah 2,075 l/m3 dan calcium stearate digunakan pada penelitian
dengan variasi penambahan ke dalam beton sebanyak 0 kg, 1 kg, 5 kg, dan 10 kg
per m3 beton. Tujuan dalam penelitian adalah untuk mengetahui pengaruh
penambahan superplasticizer & calcium stearate terhadap tingkat absorbsi beton
dan korosi baja tulangan, dan juga mengetahui penggunaan superplasticizer untuk
peningkatan workability proses pengerjaan.Sampel benda uji absorbsi berupa silinder
beton berukuran diameter 8 cm dengan tinggi 16 cm. Sedangkan sampel benda uji
korosi berupa balok beton berukuran 10x10x20 (cm) yang diberi tulangan baja
berdiameter 12 cm. Hasil pengujian diperoleh penurunan tingkat absorbsi sebesar
52,88%, 84,13% dan 90,38% untuk masing-masing penambahan calcium stearate
1 kg, 5 kg, dan 10 kg per m3 beton. Sedangkan pada pengujian korosi buatan
diperoleh penurunan resiko korosi pada baja tulangan untuk masing-masing
penambahan calcium stearate 1 kg, 5 kg, dan 10 kg per m3 beton berturut-turut
sebesar 5,4%, 16,06%, dan 89,53%. Sehingga dapat disimpulkan bahwa semakin
banyak penambahan calcium stearate mengakibatkan tingkat absorbsinya menurun
dan laju korosinya pun menurun.

Abtrak (Bhs. Inggris)

Considering the number of infrastructure planned by the goverment,
especially in the maritim sector, there for the use of reinforced concrete structure
in the aggressive area or always exposed by sea water very risky against the
corrosion of the reinforcement due to infiltration of salt from sea water, including
chloride and sulfate. These elements enter and seep into the concrete through the
pores of the capillaries in the concrete, so that concrete change of chemical
properties from alkaline to acid. As a result of these changes, the passive layer on
the surface of the steel reinforcement was damaged and causing a chemical
reaction betwen steel ions OH¯ or Cl¯. The reaction formed residual substances in
the form of rust whose volume can reach 2 to 10 times the volume of steel
reinforcement. To reduce the risk of corrosion of the steel reinforcement, so the
concrete is made watertight. Superplasticizer and Calcium stearate are added into
the concrete to reduce the level of concrete absorption. Superplasticizer was used
in 2,075 l/m3and Calcium stearate was used on research with a variety of addition
into the concrete as much as 0, 1, 5 and 10 kg/m3 of concrete. The purpose of the
research was to determine the effect of addition superplasticizer and calcium
stearate against the level of concrete absorption and corrosion of steel
reinforcement and also to determine the use of superplasticizer to improve the
workability of the process. Absorption testing method referring to SKSNI S-36-
1990-03 while the corrosion testing using artificial electrochemical corrosion
testing method. Absorption test samples using a cylinder concrete diameter of 8 cm
with a height of 16 cm. Corrosion test sample using a concrete beam with size
10x10x20 (cm) which are given steel reinforcement diameter 12 cm. The test results
obtained a decrease in the rate of absorption of 52,88%, 84,13% and 90,38% for
each addition of calcium stearate 1, 5 and 10 kg/m3 of concrete. Whereas the
artificial corrosion tests obtained redused risk of corrosion of the steel
reinforcement for each addition of calcium stearate 1, 5 and 10 kg/m3 of concrete
row of 5,4%, 16,06% and 89,53%. So it can be concluded that the more of the
addition of calcium stearate resulted in decreased levels of absorption and redused
the corrosion of steel reinforcement.

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