Everest, Def Afuww Wildan (2015) IDENTIFIKASI ZONA KOROSI PADA TULANGAN BESI BETON DENGAN PROCESSING DATA GROUND PENETRATION RADAR DAN ATRIBUT REFLECTION STRENGTH (ENVELOPE) DAERAH PLTGU MUARA KARANG, JAKARTA UTARA IDENTIFICATION OF CORROSION ZONE IN CONCRETE IRON REINFORCEMENT WITH GROUND PENETRATION RADAR DATA PROCESSING AND ATTRIBUTE OF REFLECTION STRENGTH (ENVELOPE) REGIONAL OF PLTGU MUARA KARANG, NORTH JAKARTA. Other thesis, UPN "VETERAN" YOGYAKARTA.
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Abstract
Dalam studi ini, digunakan processing data GPR, dengan menggunakan
data sekunder yaitu RAW Data dalam bentuk (RAMAC Files) sebagai inputnya
yang tujuannya untuk mendapatkan time, offset, dan amplitude. Parameter nya
berupa Frequency, dan Dielectric Constant. Penelitian ini dilakukan di PLTGU
daerah muara karang, Jakarta utara, yang bertujuan untuk menganalisa tulangan
beton yang baru dan lama dan juga tulangan besi yang mengalami korosi. Pada
line BA1 dan BA2 dapat diinterpretasi keberadaan tulangan besi pada beton
berada di kedalaman 0.1-0.3 meter, dengan waktu berkisar 2-10 ns. Pada line BA3
diinterpretasi tidak terlalu mengalami korosi. Pada line BT1 diinterpretasi
keberadaan tulangan besi pada beton berada di kedalaman 0.02 – 0.1 meter
dengan time 1 – 4 ns dan pada kedalaman 0,26 – 0.32 meter dengan time 9 – 11
ns, dan pada line BT2 dapat diinterpretasi keberadaan tulangan besi pada beton
berada di kedalaman 0.02 – 0.1 meter dengan time 1 – 5 ns dan telah mengalami
korosi.
Berdasarkan nilai konstanta dielektrik beton yaitu 0.06 m/ns, didapatkan
penampang radargram yang diinterpretasi sebagai keberadaan beton berdasarkan
nilai reflektor yang kuat dengan sifat khas tulangan besi seperti difraksi.
Sedangkan keberadaan zona korosi diinterpretasi berada pada jenis beton lama,
karena telah terpengaruh oleh air laut, terlihat pada data GPR yang menghasilkan
penampang radargram, dengan nilai amplitudo lemah juga reflektor yang kecil
yang memiliki ciri khas membentuk difraksi sehingga dapat di interpretasi sebagai
tulangan besi yang terkorosi.
Kata kunci: Geoteknik, Geo-radar, Konstanta Dielektrik, korosi, Frekuensi,
Tulangan Besi, atribut envelope, radargram, amplitudo.
In this study, I use data processing GPR, using secondary data in the form
of RAW data (RAMAC Files) as input which aim to get are time, offset, and
amplitude. The parameters are Frequency, and Dielectric Constant. This research
was conducted in the PLTGU Muara Karang, North Jakarta. The aims are to
analyze the concrete reinforcement new and old, and to analyze the concrete
reinforcemen which has a corrosion. Iron reinforcement in this study are line BA1
and BA2 can be interpreted as a presence of iron reinforcement in concrete in the
depth of 0.1-0.3 meters, with a range of 2-10 ns, line BA3 interpreted less affected
by sea water, line BT1 interpreted whereabouts steel reinforcement in concrete at
a depth of 0.02 - 0.1 meters with a time 1-4 ns and at a depth of 0.26 - 0:32 meters
with a time 9-11 ns, line BT2 can be interpreted the presence of iron
reinforcement in concrete at a depth of 0.02 - 0.1 meters time 1-5 ns. The
envelope attributes results describe the location of reinforcing iron based high
amplitude values. In the old walls that have been affected by sea water had
corroded due to oxidation (rusting), from the amplitude value radargram
weakened and which has undergone a corrosion.
Based on value of the dielectric constant of concrete is 0.06 m / ns,
obtained radargram sectional that interprets the existence of concrete by the
value of a strong reflector with characteristic iron reinforcement looks like
diffraction. While, the existence of zones of corrosion are interpreted in the type
of old concrete, because it has been affected by sea water. The data GPR is
produce of radargram sectional with the value of a weak amplitude and small
reflector with characteristic iron reinforcement looks like diffraction, thus in
interpretation as iron reinforcement which has a corrosion.
Keyword : Geotechnical, Geo-radar, Dielectric Constant, Corrosion, Frequency,
iron reinforcement, attribute of envelope, radargram, amplitude.
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | Q Science > QC Physics |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 18 May 2016 02:40 |
| Last Modified: | 18 May 2016 02:40 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/1320 |
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