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All Journal Jurnal Teknik Sipil Jurnal Teknik Sipil
Dantje A. T. Sina
Dosen pada Jurusan Teknik Sipil, FST Undana
Civil Engineering, Building, Construction & Architecture

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PENGGUNAAN PASIR BESI SEBAGAI AGREGAT HALUS BETON PEMBERAT PIPA MINYAK/GAS LEPAS PANTAI Dasalaku, Anggrainy P. W.; Sina, Dantje A. T.; Bella, Rosmiyati A
Jurnal Teknik Sipil Vol 1, No 3 (2012)
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Abstract

ABSTRAKPasir besi merupakan potensi alam yang terdapat di Pantai Pasalai Malli, KecamatanMamboro, Kabupaten Sumba Tengah, Propinsi Nusa Tenggara Timur dalam jumlahyang sangat banyak yaitu mencapai 100 juta ton. Pasir besi memiliki bobot yang beratsehingga dapat dimanfaatkan sebagai agregat halus pada beton pemberat pipa. Hasilpenelitian, dengan metode ACI memperoleh berat jenis dan kuat tekan beton pemberatsebesar 2722.868 kg/m3 untuk kekuatan 38.14 MPa. Beton ini memenuhi persyaratanabsorpsi beton pemberat di bawah 5% yaitu maksimum 4.29%.
PENGARUH PENAMBAHAN SERAT DAUN GEWANG (CORYPHA UTAN LAM) TERHADAP KUAT LENTUR DAN KUAT TARIK BELAH BETON Ndoen, Vista G.; Sina, Dantje A. T.; Bunganaen, Wilhelmus
Jurnal Teknik Sipil Vol 4, No 1 (2015): Jurnal Teknik Sipil
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Abstract

Pemanfaatan daun gewang dipilih karena daun gewang dinilai cukup kuat untuk menahan tarik. Berdasarkan hal ini maka daun gewang diproses menjadi serat dan digunakan sebagai bahan tambahan pada beton untuk menambah kekuatan beton.Penelitian ini bertujuan untuk mengetahui pengaruh penambahan serat daun gewang (corypha utan lam) terhadap kuat lentur dan kuat tarik belah beton serta untuk mengetahui persentase penambahan serat daun gewang (corypha utan lam) yang tepat untuk mencapai kuat lentur dan kuat tarik belah maksimum.Benda uji yang digunakan dalam penelitian ini adalah balok beton dengan ukuran 15 x 15 x 60 cm3 dan silinder beton dengan ukuran tinggi 30 cm dan diameter 15 cm. Mutu beton f’c = 25 MPa.Jumlah benda uji 72 buah dengan 3 sampel pada masing – masing waktu dan perlakuan.Sampel – sampel tersebut diberi penambahan konsentrasi serat 0,25%, 0,50% dan 0,75% terhadap berat semen dimana serat – serat tersebut telah direndam dalam alkali NaOH 5% selama 2 jam dengan panjang serat 3 cm. Hasil penelitian menunjukkan bahwa penambahan serat daun gewang pada campuran beton dapat meningkatkan kekuatan beton dan juga dapat menahan patahan beton.Persentase penambahan serat daun gewang sebesar 0,75% mempunyai nilai kuat lentur 5,96 MPa dan nilai kuat tarik belah sebesar 3,94 MPa. Dengan demikian hasil penelitian penambahan serat daun gewang pada campuran beton menunjukkan nilai maksimum kuat lentur dan tarik belah beton terdapat pada penambahan serat gewang dengan persentase sebesar 0,75% pada umur 28 hari. Utilization of gewang leaf been selected because leaf of gewang assessed strong enough to hold then tensile. Based on this, leaf of gewang processed become fiber and used as an additive concrete to increase concrete strong. Purpose of this research are to know about the effect of the addition of leaf fibers gewang (Corypah Utan Lam) to the bending strength and concrete crack tensile strength and also to know an exact presentation of addition of leaf gewang fiber (Corypah Utan Lam) to get the bending strength optimum and crack tensile strength optimum. The test specimen used in this research are beam concrete with size 15x15x60 cm3+ and the heightof cylinder concrete is 30 cm with diameter 15 cm. Concrete quality f’c = 25 Mpa.The number of test specimen with 72 pieces with 3 specimen on each time and treatment. Specimen are given the addition of fiber concentration of 0.25%, 0.50%, and 0.75% by weight of cement where fibers that has been soaked Alkaline NaOH 5% for 2 hours with a fiber length of 3 cm. The result showed that the addition of gewang fiber that used in the concrete mix can increase the strength of concrete and also holding the crack of concrete.Percentage of 0.75% gewangleaf fiber has a bending strength value of 5.96 Mpa and crack tensile strength value divided by 3.94 Mpa. Thus, the result of additional gewang fiber research of the concrete mixture showed the optimum value bending strength and crack tensile concrete are in addition to the percentage of gewang fiber of 0.75% at 28 days.
ANALISA INDEKS BIAYA UNTUK PEKERJAAN BETON BERTULANG DENGAN MENGGUNAKAN METODE SNI 7394-2008 DAN LAPANGAN (Studi Kasus pada Proyek Pembangunan Asrama STIKES CHMK Tahap III) Messah, Yunita A.; Sina, Dantje A. T.; Manubulu, Christiani C.
Jurnal Teknik Sipil Vol 2, No 1 (2013): Jurnal Teknik Sipil
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Abstract

The index cost affect the amount of unit price construction work. Cost index used in the calculation analysis of unit price refers to the Standar Nasional Indonesia (SNI). SNI describe about the average labor productivity in Indonesia. Labor productivity are different depend on work experience, cultural origins, and the others. This study was conducted to know the costs index of labor in Kupang by took one of case study on STIKES CHMK Dormitory Construction Project in third Phased. Cost index of reinforced concrete in this project, obtained by doingreal observation for the total of labor and time required to complete each item of reinforced concrete, especially the workfrom column,beam and plate and it began from the work of iron, formwork, casting up to demolition formwork.Then the observationsresult were analyzed descriptively. Based on the analysis result, the amount of the cost index is 0.0208 foreman: 0.0377 the head of handyman: 0.09929 handyman: 0.2502 worker to install 1m2 formwork, 0.0044 foreman: 0.0177 the head of handyman: 0.0268 handyman : 0.0796 worker to work 10 kg iron, and 0.0340 foreman: 0.0272 the head of handyman: 0.1427 handyman: 1.1888 worker to make 1m3concrete. This index used in the analysis of the differentation of labor presentage based on SNI and field method and continued with the calculation of unit price for each work item which used SNI and field method.
PENGARUH PENAMBAHAN CACAHAN LIMBAH PLASTIK JENIS HIGH DENSITY POLYETHYLENE (HDPE) PADA Sina, Dantje A. T.; Udiana, I Made; Da Costa, Bernad D.
Jurnal Teknik Sipil Vol 1, No 4 (2012)
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Abstract

Waste is a very complex problem in urban area. Plastic waste is increasing every year. Kupang with population of 291,794 people generate waste reaches 926 m3/day. Organic waste to 700 m3 and inorganic waste about 226 m3. Concrete is planned by strength quality 25 MPa. Based on the analysis in this study obtained that concrete flexural strength value increased due to the addition of HDPE plastic shredded into the concrete, with chopped levels are added to the concrete at 0%, 0.50% and 0.90% .0,70%. Flexural strength value of normal concrete without the addition of shredded plastic (0%) is 4.12 MPa, flexural strength of concrete with the addition of shredded plastic 0.50% is 4.30 MPa increased 4.37% from normal concrete flexural strength, flexural strength of concrete with the addition of shredded plastics 0.70% is 4.21 MPa increased 2.19% from the normal concrete flexural strength and flexural strength of concrete with the addition of shredded plastic 0.90% is 3.94 MPa decreased 3.64% of flexural strength normal concrete.
PENGENDALIAN WAKTU DAN BIAYA PEKERJAAN KONSTRUKSI SEBAGAI DAMPAK DARI PERUBAHAN DESAIN Messah, Yunita Afliana; Lona, Lazry Hellen Paula; Sina, Dantje A. T.
Jurnal Teknik Sipil Vol 2, No 2 (2013): Jurnal Teknik Sipil
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Abstract

The purpose of this study is to describe the effect of changing control of the design that have an impact on the time and cost of construction work that affects the performance of construction work Embung Irrigation Oenaem. This study used two methods of controlling the Earned Value Analysis (EVA) and integrated method of shortening the duration of the critical path (Crashing Length) at Critical Path Method (CPM) using the application as an alternative to controlling overtime. To use of the two methods mentioned above it can be seen and obtained alternative pengedalian time and construction costs as a result of design changes that occurred in the Irrigation Development Project Embung Oenaem. Based on the analysis that had been done when a deviation occurs at 7 weeks, the total work period to 37 weeks from 30 weeks the amount of time a plan with estimated cost is Rp. 9,489,206,129.03. Then controlled using the method of shortening the duration (Crashing Length) with future application of the overtime work to 35 weeks (5 weeks delay) with the amount of the cost of Rp. 9.458.239.978,70 (excluding VAT) of the total contract value of Rp. Rp. 8.563.635.912,98 (excluding VAT 10%).
STUDI KELAYAKAN TEKNIS PENGGUNAAN PASIR LAUT ALOR KECIL TERHADAP KUALITAS BETON YANG DIHASILKAN Ramang, Ruslan; Sina, Dantje A. T.; Irpan, Muhamad
Jurnal Teknik Sipil Vol 3, No 2 (2014): Jurnal Teknik Sipil
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Abstract

Pembangunan di Kabupaten Alor khususnya di Desa Alor Kecil masih menggunakan pasir laut untuk dijadikan sebagai bahan agregat halus dalam pembuatan beton. Namun secara ilmiah belum diketahui kualitasnya, sehingga perlu dilakukan kajian atau studi tentang kelayakan kualitas beton dari bahan tersebut. Tujuan penelitian ini adalah untuk mengetahui kelayakan berdasarkan kualitas beton yang dilihat dari nilai kuat tekan serta kuat tarik belah beton menggunakan pasir laut Alor Kecil kondisi asli maupun yang dicuci terlebih dahulu dengan sampel beton pasir takari pada umur 7 hari, 14 hari dan 28 hari. Benda uji yang digunakan adalah beton silinder (diameter 15 cm dan tinggi 30 cm). Metode yang digunakan untuk analisa data adalah statistik deskriptif berupa perbandingan hasil pengujian berupa grafik dan tabel serta perhitungan statistik berupa analisis varians. Berdasarkan hasil uji kualitas diperoleh hasil bahwa untuk kuat tekan beton pasir takari memiliki nilai lebih besar dibandingkan beton pasir laut Alor Kecil baik kondisi asli maupun yang dicuci terlebih dahulu, hal yang sama juga diperoleh untuk pengujian kuat tarik belah beton. Selain itu pengujian kuat tekan untuk semua beton memenuhi kuat tekan perlu yang disyaratkan oleh SNI. Di samping itu, hasil pengujian statistik berupa analisis varians diperoleh kesimpulan bahwa tidak ada perbedaan yang signifikan dari hasil pengujian kuat tekan untuk masing masing sampel beton tersebut.
EVALUASI BAHAYA GEMPA (SEISMIC HAZARD) DENGAN MENGGUNAKAN METODE POINT SOURCE DAN PENENTUAN RESPONS SPEKTRA DESAIN KOTA KUPANG Sina, Dantje A. T.
Jurnal Teknik Sipil Vol 1, No 1 (2011)
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Abstract

AbstrakGempa yang terjadi pada suatu lokasi diakibatkan oleh adanya pelepasan energi daripusat gempa, yang kemudian merambat hingga lokasi gempa. Besarnya energi yang sampaike lokasi akan mempengaruhi besarnya gempa yang terjadi. Seismic hazard analysismerupakan analisa pengaruh pelepasan energi dari pusat gempa terhadap lokasi tertentu,yang akan menghasilkan parameter-parameter gerakan tanah yang berguna bagi desainstruktur.Berdasarkan Standar Perencanaan Ketahanan Gempa untuk Struktur BangunanGedung (SNI – 1726 – 2002), kota Kupang berada dalam batas wilayah 4 dengan faktorrespons gempa 0.20 g dan wilayah 5 dengan faktor respons gempa 0.25g. Namun, dalamkurun waktu beberapa tahun terakhir, terjadi beberapa kali gempa dengan magnitude lebihdari 8 skala Richter. Oleh karena itu, perlu dilakukan penelitian tentang Bahaya Gempa(Seismic Hazard) dan Penentuan Respons Spektra Desain Kota Kupang dengan tujuanuntuk mengetahui nilai Peak Ground Acceleration (PGA) kota Kupang akibat gempa periodeulang 500 tahun dan respons spectra desain yang tepat untuk kota Kupang sesuai denganPGA di atas.Penelitian ini menghasilkan gempa rencana dengan periode ulang 500 tahun di kotaKupang mempunyai Peak Ground Acceleration (PGA) 0.2 g dan memiliki durasi antara 8detik dan respons spectra desain yang tepat untuk kota Kupang dengan menggunakanpercepatan adalah maksimum 1961.33 mm/s2.AbstractThe earthquake which occurred at a site is caused by the release of energy from theepicenter, which then propagate to the location of the earthquake. The amount of energy tothe location will affect the magnitude earthquake that occurred. Seismic hazard analysis is ananalysis of the influence of the release of energy from the epicenter of a particular location,which will result in ground motion parameters are useful for the design of the structure.Based on Standar Perencanaan Ketahanan Gempa untuk Struktur Bangunan Gedung(ISO - 1726 - 2002), the city of Kupang located within the boundary 4 with 0,20 g seismicresponse factor and region 5 with 0.25g earthquake response factor. However, within recentyears, occurred several times a quake with a magnitude of more than 8 on the Richter scale.Therefore, the need to do research on Seismic Hazard and determination of response spectradesign of the city of Kupang in order to know the value of Peak Ground Acceleration (PGA)*) Dosen Teknik Sipil FST Undana 42Kupang earthquake return period of 500 years and the response spectra for the city ofKupang.This research results an earthquake with return period of 500 years in Kupang city has aPeak Ground Acceleration (PGA), 0.2 g and has a duration of between 8 seconds and theresponse spectra for Kupang by using the maximum acceleration is 1961.33 mm/s2.
TINJAUAN KUAT LENTUR BALOK KOMPOSIT KAYU Alves, Paulito M. D.; Sina, Dantje A. T.; Cornelis, Remigildus
Jurnal Teknik Sipil Vol 2, No 2 (2013): Jurnal Teknik Sipil
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Abstract

This research was use wood beam, reinforced concrete plate and nail as shear connector. Nail that used is artless nail and thread nail that public reside in marketing. the purpose of this research is to know bending strength of a composite beam of wood-concrete with shear connector artless nail and shear connector thread nail. The research was conducted at the Laboratory of Concrete Civil Engineering Department University of Nusa Cendana Kupang - NTT and Laboratory of Mechanical Engineering State Polytechnic of Kupang - NTT. From the results of research and analysis of the data obtained the maximum tension of composite beam with shear connector artless nail : maximum load as big as 40000 N; bending moments as big as 5.01 x106 Nmm; tension depresses as big as 29,327 N/mm2; contact surface-tension as big as 3,545 N/mm2; bending stress as big as 16,381 N/mm2; the shear stress as big as 6,325 N/mm2. Whereas the average test results of composite beams with shear connector thread nail is obtained by maximum load as big as 51667 N; bending moment as big as 6.47 x 106 Nmm ; tension depresses as big as 38,400 N/mm2; contact surface-tension as big as 4,624 N/mm2; bending stress as big as 21,205 N/mm2; the shear stress as big as 8,036 N/mm2.
Co-Authors Amorin Menezes Anggrainy P. W. Dasalaku Bernad D. Da Costa Christiani Chandra Manubulu Elia Hunggurami Lazry Hellen Paula Lona Muhamad Irpan Paulito M. D. Alves Remigildus Cornelis Rosmiyati A Bella Ruslan Ramang SATRIYAS ILYAS Vista G. Ndoen, Vista G. Wilhelmus Bunganaen Yunita A. Messah