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INDONESIA
JURNAL POLI-TEKNOLOGI
Published by Politeknik Negeri Jakarta
ISSN : 14122782     EISSN : 24079103     DOI : https://doi.org/10.32722/pt.v20i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Poli-Teknologi Journal is a journal, which began publication in 2002, published by the Research and community service Unit of Politeknik Negeri Jakarta. It starts from Volume 1 Number 1 in January 2022 for printed version; ISSN (print) 1412-2782 and ISSN (online) 2407-9103. Poli-Teknologi Journal is a series of scientific publications in applied science and technology area from the perspective of a multi and interdisciplinary studies and it is published 3 times in year.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 14 Documents
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Search results for , issue "Vol. 10 No. 1 (2011)" : 14 Documents clear
TINJAUAN VARIASI TEBAL GROUTING SIKADUR® 31 CF NORMAL Dan PANJANG PENYALURAN TERHADAP DAYA LEKAT BAJA TULANGAN PADA BETON MUTU NORMAL Anis Rosyidah; Gilang Maulid R; Efendi Yasin
Jurnal Poli-Teknologi Vol. 10 No. 1 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.744 KB) | DOI: 10.32722/pt.v10i1.435

Abstract

Abstract One of the requirements in reinforced concrete structures is the existence of bonding between reinforcement and concrete, so that if the concrete structure of the given load will not slip between reinforcing steel and concrete, with a condition for disbursement length and diameter sufficient reinforcement. This research was conducted with laboratory experimental methods, this study used threaded steel bars 10 mm in diameter grown on cylindrical concrete specimens with a length variation of normal quality distribution of 100 mm and 200 mm, and for thickness variation Sikadur® 31 CF Normal used a thickness variation mm, 2 mm, 3 mm. Each specimen is tested with a method of "bond, a pull-out test". Based on the results obtained from voltage variations thick adhesive Sikadur® 31 CF Normal, with thick sticky voltage Sikadur®31 CF Normal 2 mm produces voltage optimium closely with the value of 8.412 MPa,the adhesive stresses are found for the distribution of the required length of 182.860 mm for thickness variation Sikadur® 31 CF Normal 1 mm, 97.586 mm for thickness variation Sikadur® 31 CF Normal 2 mm, while for thickness variation Sikadur® 31 CF Normal 3 mm can not be calculated and analyzed the test results because of the "bond, a pull-out" no reinforcing steelreaches the yield condition, caused by broken concrete and reinforcing steel cylinder apart before reaching the yield condition. Then the length distribution obtained by the above formula Park & Paulay compared with the length distribution of article 14.2 of SNI 30-2847-2002 obtained epoxy ratio of 2:13 for the thickness of 2 mm with a planting of 100 mm. In the epoxy thickness 1 mm with 200 mm obtained planting 2:7 ratio, and the planting of monoliths obtained 2:5 ratio. Bold use of Sikadur® 31 CF Normal apparently affect the pattern of damage to the concrete and steel. When planting steel bars are too short we need a thicker epoxy, planting reinforcement 100 mm with a thickness of 3 mm epoxy. When planting longer needed a thinner epoxy, the planting of 200 mm reinforced epoxy with a thickness of 1 mm. Based on the pattern of damage that occurs, the thickness of epoxy should consider the quality of concrete used to prevent the destruction of the concrete. Keyword: grouting thickness, development length, bond stress.
PENGUJIAN KETAHANAN API PELAT LANTAI SANDWICH BETON – POLYSTYRENE – BETON Sumargo Sumargo
Jurnal Poli-Teknologi Vol. 10 No. 1 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (856.954 KB) | DOI: 10.32722/pt.v10i1.436

Abstract

Abstrak Satu benda uji pelat lantai sandwich beton-polystyrene-beton dengan ukuran 3500 mm x 3600 mm dan tebal 170 mm diuji ketahanan terhadap api. Pelat beton yang dinamakan sebagai b-deck ini terdiri dari tiga lapis yaitu 30 mm pada bagian bawah terdiri dari beton semprot demikian juga dengan bagian atas tetapi dengan ketebalan 40 mm. Kedua lapisan beton ini mengapit polystyrene setebal 100 mm. Dalam arah melintang dari sisi panjang 3600 mm dipasang balok anak sebanyak 6 buah dan berjarak 600 mm satu dengan lainnya. Balok anak mempunyai tulangan tiga buah berdiameter 12 mm dengan masing-masing 2 tulangan di bawah dan satu di atas. Tulangan sengkang balok ini berdiameter 8 mm dengan jarak 150 mm dengan mutu BJ34. Balok anak mempunyai tinggi 120 mm yang tertanam dalam pelat dan tidak muncul di bawah permukaan pelat. Selimut beton di atas dan bawah polystyrene dipasang wiremesh berdiameter 3 mm dengan jarak 150 mm x 80 mm dimana jarak 80 mm dipasang dalam arah memanjang atau dalam arah 3600 mm sedangkan wiremesh melintang yang berjarak 150 mm berada dalam arah 3500 mm. Wiremesh mempunyai tegangan leleh minimum 550 MPa dan mutu beton minimum 22,5 MPa. Pelat ditempatkan pada tungku uji dengan simulasi beban tambahan berupa tumpukan karung pasir merata pada seluruh permukaan atas pelat sebesar 200 kg/m2. Pada bagian bawah yaitu sisi selimut beton 30 mm dipanaskan secara bertahap dari kondisi temperatur ambien hingga mencapai temperatur tungku rata-rata 1090oC. Tahapan pengujian ini mengikuti SNI 1741-2008 dimana pada menit ke 10 temperatur dinaikkan hingga 632oC, menit ke 70 mencapai 1006oC dan dihentikan pada menit ke 180 yaitu sebesar 1090oC. Hasil pengujian menunjukkan bahwa kekakuan pelat berkurang sebesar 38% saat pembakaran berlangsung 30 menit atau mencapai 712oC dan menjadi 56% hingga terakhir pembakaran selama 180 menit. Berat sendiri pelat b-deck yang hanya 54% dari berat pelat konvensional dengan ketebalan yang sama berikut beban tambahan sebesar 200 kg/m2 memberikan defleksi maksimum sebesar 3,5 mm. Sedangkan defleksi maksimum pada akhir pembakaran adalah 60,84 mm. Hal ini menunjukkan bahwa api berpangaruh sangat signifikan pada pelat lantai ini. Hasil verifikasi dengan menggunakan perangkat lunak SAP2000 dengan model elemen shell, dengan ukuran elemen 180 mm x 175 mm, 2 titik integrasi, dengan tiga lapis pelat sesuai dengan faktual, perletakan sendi menghasilkan lendutan maksimum sebesar 73,6161 mm, sedangkan untuk tumpuan jepit memberikan defleksi maksimum sebesar 0,08882 mm. Hal ini menunjukkan bahwa kondisi peletakan sangat berpengaruh pada defleksi dan hal ini bisa mensimulasi kondisi pelat di lapangan yang mempunyai kekangan dari balok disekelilingnya. Hasil pengujian menunjukkan bahwa pelat memenuhi persyaratan Tingkat Ketahanan Api (TKA) 180/180/160 sesuai dengan SNI 1741-2008 yaitu memenuhi stabilitas, integritas, dan insulasi. Kata kunci: SNI 1741-2008, api, polystyrene, temperatur, pelat, b-deck
DAMPAK GRADASI AGREGAT DENGAN DUA VARIASI ASPAL TERHADAP SIFAT CAMPURAN BETON ASPAL Mulyono Mulyono; Edy Pramono; Eva Azhra Latifa
Jurnal Poli-Teknologi Vol. 10 No. 1 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (42.938 KB) | DOI: 10.32722/pt.v10i1.438

Abstract

Abstract This research meant to observe impact of aggregate gradation with two kind of asphalt towards asphaltic concrete properties. Asphalt Cement Wearing Course research which is applied to aggregate gradation above and below Restriction zone according to Bina Marga December 2005 specification. Both of asphalt has same viscosity but come from different resources suggest different behavior at temperature impact. Laboratory test do to determine void in mineral aggregate, void in mixture and void filled with asphalt, stability and flow occurred. The conclusions are: (1) For two kind of asphalt Pertamina and Shell, aggregate gradation above restriction zone better than below, however some result does not show any patron. (2) Two kind of asphalt with same penetration have same asphalt optimum percentages, 6 - 6,5%. (3) Aggregate gradation above restriction zone has 1312 kg -812 kg stability with 3,97% - 3,93% void in mixture with 10% filler. (4) Refusal test for two kind of asphalt’s result shows that smallest void in mixture and biggest void filled with asphalt occur at above restriction zone. Keywords: aggregate gradation, restricition zone, void, stability, flow.
PERBANDINGAN EFISIENSI BAK PROSES DUA SEL DAN TIGA SEL DALAM MENURUNKAN KANDUNGAN BESI (Fe) DALAM AIR LIMBAH SECARA ELEKTROKOAGULASI DENGAN KATODA DARI KARBON BEKAS BATERAI Sutanto Sutanto
Jurnal Poli-Teknologi Vol. 10 No. 1 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v10i1.537

Abstract

The content pollutants of iron (Fe) in waste water that uncontrolled can cause environmental pollution. Iron content in the waste water that exceeds 1 mg / L is not safe for the environment. Because the regulation of the Minister of Environment No.Kep-03/MENKLH/II/1991 explained that the maximum content of iron in the waste water is 1 mg / L If the iron content in the waste water exceeds that of such provision, the waste water must be treated until comply with the regulations of the Ministry of Environment. One of the processing carried out in this research is to apply the electrocoagulation process with aluminum as anode and waste carbon baterry as cathode. The research is conducted by flowing water of 7 liters of industrial waste water into the bath electrocoagulation process. The process is runing in the two and three cell of tank with an power electric 12 V and intervals of 2 minutes for observation iron content in waste water. The iron content in waste water is analyzed by Atomic Absorption Spectrophotometer (AAS). The results of process until 28 minutes showed that the iron content is reduced from 4.23 mg/L to 0.91 mg/L or equivalent with 78.49 % for process in two cells and from 4.23 mg/L to 0.33 mg/L or equivalent with 92.20 % for process in three cells. Conclusion, the efficiency of the three cells is the best than two cells to reduced iron content in the waste water. Keywords:Waste water, Pollutant of Copper,Electrocoagulation,Reduction of Pollutant

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