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All Journal E-journal Widya Eksakta JURNAL KAJIAN TEKNIK SIPIL Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil International Journal of Civil Engineering and Infrastructure (IJCEI) Prosiding Seminar Nasional Rekayasa dan Teknologi (TAU SNAR- TEK)
Dewita, Hikma
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Transportation Other

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KAJIAN KUAT TEKAN DAN KUAT LENTUR PADA BETON MUTU FC’35 DITAMBAH FLY ASH DAN ABU SEKAM PADI RICE HUSK ASH Mardiaman; Dewita, Hikma; Narto, Heribertus
E-journal Widya Eksakta Vol 2 No 1 (2020)
Publisher : E-journal Widya Eksakta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Beton merupakan material komposit yang bahan utamanya terdiri dari semen, agregat (halus dan kasar) dan air dengan komposisi tertentu. Salah satu bahan utama pembuatatan beton yaitu semen Portland, Di Indonesia dari September 2017 hingga september 2018, konsumsi tahunan Portland di Indonesia meningkat dari 47,43 juta ton menjadi 49,76 juta ton. Dengan meningkatnya pembanggunan konstruksi di Indonesia, itu membutuhkan banyak penyediaan semen Portland sementara produksi semen Portland di Indonesia tentunya akan menurun dari tahun ke tahun. Oleh karena itu bahan pengganti yang menjanjikan adalah abu terbang (fly ash) dan abu sekam padi (rice husk ash) yang menggantikan perananaan semen. Produksi limbah abu terbang dan abu sekam padi dapat dikendalikan dan dimanfaatkan sebagai penambahan semen pada beton mutu fc’35. Penelitian ini dilakukan di laboratorium PT. Adhimix Precast Indonesia dan berlansung selama 28 hari, dimulai dari persiapan bahan material beton sampai dengan pengujian test tekan dan test lentur. Mutu beton yang dikaji yaitu beton mutu Fc’ 35 Mpa dengan nilai slump yang direncanakan yaitu 75-100 mm. Hasil penelitian menunjukkan variasi campuran dengan menambahkan fly ash dan rice husk ash sebagai pengganti semen 0–20 % dapat mencapai target yang direncanakan yaitu diatas 35 MPa. Selanjutnya disimpulkan bahwa penambahan fly ash dan rice husk ash 0–20 dapat digunakan pada konstruksi beton.
Analisis Struktur Beton Pelat Lantai dan Balok dengan Metode Bekisting Sistem Fix Shoring Arisyi, Luthfan; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 8 No. 2 (2024)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v8i2.15598

Abstract

In the construction of a building, it is necessary to plan a concrete structure that can make us feel safe and comfortable. The concrete structure itself is very close to making a slab and beam, the design and implementation of a slab and beam has many innovations in the manufacturing process. One of the information during the construction of the structure is formwork with a fixed shoring system. Where when the formwork can be removed quickly enough from the usual time, this will cause a reaction on the structure itself and the fix shoring is the part that reduces the impact of the reaction. The purpose of this study was conducted to find out whether the fix shoring system formwork is able to provide safe results according to the building permit. The fix shoring method based on the results of the analysis obtained, the floor slab concrete structure was able to withstand the deflection that occurred on day 2 (2.891 of the maximum deflection of 8.333). Meanwhile, the elastic deflection only met the requirements on day 3 (Mu<Mcr, 8.729 kN/m < 8.700 kN/m). For the concrete structure itself has a size of 40x70 and 30x70. The conclusion is that the overall results comply with the specified permits from the pedestal to the field. It can be stated that the formwork of the fixed shoring system, on the 3rd day, the formwork can be removed without affecting the state of the concrete structure.
CONTROL OF SCHOOL FACILITIES AND INFRASTRUCTURE PROJECTS OF OGAN KOMERING ILIR REGENCY AND OGAN ILIR REGENCY Sanrach, Handa Dwi; Dewita, Hikma; Sembiring, Kristina; Nabiho, Pio Ranap Tua
International Journal of Civil Engineering and Infrastructure Vol 3, No 2 (2023): IJCEI Volume 3 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.3.2.21-30

Abstract

The project and school infrastructure of Ogan Komering Ilir Regency and Ogan Ilir Regency aims to determine project performance. The analysis was carried out based on completed projects in the aspects of time and cost control using the Earned Value Analysis concept which consists of three indicators, namely BCWS, BCWP and ACWP. The analysis was carried out on time deviations (SV), cost deviations (CV), total budget deviations (BV) and was carried out in weeks (21 weeks). From this deviation analysis, productivity and project performance can be analyzed again, such as the time performance index (SPI) and Cost Performance Index (CPI). Based on Earned Value analysis, the schedule deviation (SV) on the project is 0. This means that in Week 21 the heavy work carried out was completed according to plan. Apart from that, the time performance index on the project is 1 (implementation completed according to schedule), while the cost performance index is 1.03 (1.3 > 1 which means expenditure is lower than planned).
ANALISIS BIAYA DAN WAKTU PROYEK APARTEMEN GATEWAY PARK JATI CEMPAKA DENGAN METODE NILAI HASIL dan, hamdan; Simanihuruk, Bertinus; Dewita, Hikma
Jurnal Kajian Teknik Sipil Vol 9, No 1 (2024): JURNAL KAJIAN TEKNIK SIPIL
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jkts.v9i1.6140

Abstract

Perencanaan  pengendalian  waktu  dan  biaya  merupakan  bagian dari  struktur  manajemen proyek konstruksi secara keseluruhan. Pengendalian proyek diperlukan agar pekerjaan tetap berjalan sesuai rencana dalam batas waktu, biaya dan mutu yang ditetapkan pada  rencana awal. Analisis dilakukan pada proyek Apartemen Gateway Park Jati Cempaka, Bekasi.Dengan analisis konsep Nilai Hasil dapat diketahui hubungan antara apa yang sesungguhnya telah dicapai secara fisik terhadap jumlah anggaran yang telah dikeluarkan. Ada tiga indikator dasar yang menjadi acuan dalam menganalisis kinerja dari proyek berdasarkan konsep Nilai Hasil,yaitu  BCWS, BCWP, dan ACWP. Tujuan penelitian ini untuk menganalisis biaya dan waktu pekerjaan pada Proyek Apartemen Gateway Park Jati Cempaka ini adalah:Mengetahui penyimpangan terhadap waktu pada Proyek Apartemen Gateway Park Jati Cempaka.Mengetahui penyimpangan terhadap biaya pada Proyek Apartemen Gateway Park Jati Cempaka.Mengetahui pengendalian biaya  pada Proyek Apartemen Gateway Park Jati Cempaka.Mengetahui indeks kinerja biaya dan waktu pada Proyek Apartemen Gateway Park Jati Cempaka Dari hasil perhituangan Schedule Varians (SV) pada minggu pertama sampai Minggu ke 24 (dua puluh empat) menunjukan angka negatif,yang artinya pelaksanaan proyek lebih lambat dibandingkan Schedule yang direncanakan.Dari hasil perhitungan Cost Varians (CV) pada Minggu ke 2 dan Minggu ke 3 menunjukan angka negatif yang artinya proyek menelan anggaran lebih besar dari rencana awal sementara pada Minggu ke 4 dan Minggu ke  5 menunjukan angka positif yang artinya penggunaan biaya proyek lebih kecil dari anggaran dan pada Minggu ke 6 sampai dengan Minggu ke 24 proyek kembali menelan anggaran biaya lebih besar dari rencana awal proyek. Hasil perhitungan Schedule Performance Index (SPI) pada minggu pertama sampai dengan Minggu ke 24 sebesar 0,95 yang menunjukan proyek mengalami keterlambatan.Hasil perhitungan Cost Performance Index (CPI) pada minggu pertama sampai dengan Minggu ke 24 sebesar 1,00 menunjukan bahwa pelaksanaan proyek dilapangan sesuai dengan rencana anggaran biaya.
ANALYSIS OF COST AND TIME CONTROL ON THE LIBRARY CONSTRUCTION PROJECT OF THE POLICE TRAINING INSTITUTE USING THE EARNED VALUE Xena S P, Canda; Bangun, Sempurna; Dewita, Hikma; Naibaho, Pio Ranap Tua
International Journal of Civil Engineering and Infrastructure Vol 4, No 2 (2024): IJCEI Volume 4 No. 2
Publisher : University Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/ijcei.4.2.1-12

Abstract

In a construction project, the factors that become indicators of the success of a project are that it must be cost, time and quality that can be achieved by planning, scheduling, and controlling its implementation properly. The method used to analyze data regarding cost control and project implementation time so that it can be effective and efficient is to use the concept of the value of the results (Earned Value Concept). From the data that has been obtained, the next step is to calculate the work weight for each item. Then an analysis of cost and time control is carried out using several approaches, namely: BCWS, BCWP and ACWP. The results of project data processing use the analysis calculation of the result value method. From the calculation of the Schadule Variance (SV) the work accelerates 1 week from the predetermined schedule. the total schedule/schedule 17 weeks of work and the results of the calculation on the 17th week is 2,710,716.28. Showing a positive number, this indicates that the implementation of the work is faster than the planned schedule. From the results of the calculation of Cost Variance (CV) the work has accelerated by 1 week from the predetermined schedule. week 17 is 2,011,321,591.90. Showing a positive number, this indicates that the cost to complete the project is less than the planned cost. The calculation result of the Schedule Performance Index (SPI) that the work has accelerated 1 week from the predetermined schedule. In week 1 to week 17 of 1.00, it shows that the project was carried out on time. The results of the calculation of the Cost Performance Index (CPI) of work accelerated by 1 week from the predetermined schedule. In the 1st week to the 17th week of 1.00 indicates that the work in the field costs in accordance with the planned budget
Karakteristik Beton Mutu FC 30 Dengan Menggunakan Limbah Peleburan Baja (Slag) Dan Pembakaran Batubara (Fly Ash) Nur Rohman, Muhammad; Simanihuruk, Bertinus; Dewita, Hikma
Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi Vol. 5 No. 1 (2025): Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi 2024
Publisher : Fakultas Teknik dan Teknologi - TANRI ABENG UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47970/snarstek.v2i1.771

Abstract

The use of slag and fly ash waste for building materials is not optimal, because it contains heavy metal oxides. With the issuance of Government Regulation no. 22 of 2021, dust resulting from burning coal from Steam Power Plants and other activities is not included as B3 waste. With research on the use of fly ash and slag to increase the compressive strength of concrete, research was carried out in the laboratory to determine the optimal composition for the use of slag and fly ash as a substitute for coarse aggregate and cement in concrete mixtures. By testing in the laboratory, results were obtained with variations in slag. 10, 20% and 30% with fly ash remaining at 10% as a concrete mixture by comparing with a normal concrete mixture. From the test results, the results obtained were that the addition of slag and fly ash waste could reduce the heat of concrete at FC 30, producing concrete compressive strength close to normal concrete compressive strength, namely 26.31 MPa for 7 days, 33.11 MPa at 28 days, and 39.61 MPa at 56 days with composition10% slag and 10% fly ash with the slump value achieved was 6 cm which makes it difficult to make concrete. The addition of 20% and 30% slag with 10% fly ash produces a compressive strength of concrete that is lower than the concrete compressive strength of FC 30. The appropriate composition to use is 10% slag as a substitute for coarse aggregate and 10% fly ash as a cement substitute
PENGARUH PENGGUNAAN STYROFOAM DAN KAWAT BENDRAT TERHADAP KUAT TEKAN BETON RINGAN Prisilia, Anggita; Simanihuruk, Bertinus; Dewita, Hikma
Jurnal Kajian Teknik Sipil Vol 6, No 1 (2021): JURNAL KAJIAN TEKNIK SIPIL
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jkts.v6i1.4832

Abstract

Beton merupakan material yang banyak digunakan untuk struktur. Salah satu metode yang dapat digunakan untuk mengurangi berat jenis beton yaitu dengan menggunakan agregat ringan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penggunaan kawat bendrat pada beton ringan. Beton ringan merupakan salah satu jenis beton dengan berat volume dibawah 1850 kg/m3 . Agar beton menjadi ringan, penambahan styrofoam dilakukan pada campuran beton. Beton yang semakin ringan maka kekuatan yang dimiliki akan semakin rendah, untuk itu dilakukan penambahan serat pada beton segar. Berkaitan dengan hal tersebut, dilakukan penelitian bersifat eksperimen di Laboratorium membuat beton menggunakan kawat bendrat sebesar 1% dari jumlah semen dengan penambahan styrofoam 10%, 30%, dan 50% dari volume agregat kasar terhadap kuat tekan beton. Pengujian dilakukan pada umur beton 14 hari dan 28 hari menggunakan benda uji berbentuk silinder 15 cm x 30 cm. Dari hasil penelitian, didapat hasil kuat tekan pada umur beton 14 hari dan 28 hari untuk beton normal sebesar 29.47 MPa dan 32.75 MPa. Pada beton serat nilai kuat menurun menjadi 26.93 MPa dan 29.53 MPa. Untuk kuat tekan beton serat dengan penambahan styrofoam 10%, 30% ,dan 50% pada 14 hari didapat 28.47 MPa, 22.37 MPa, dan 13.76 MPa. Sementara pada umur beton 28 hari didapat 31.85 MPa, 26.30 MPa, dan 15.44 MPa. Hasil penelitian dapat disimpulkan bahwa semakin banyak penambahan styrofoam kuat tekan akan semakin menurun. Kuat tekan beton maksimum diperoleh pada beton variasi penambahan styrofoam 10%, akan tetapi pada variasi tersebut tidak dikategorikan sebagai beton ringan. Beton ringan pada penelitian ini diperoleh pada penambahan styrofoam 50% dengan berat volume 1839.62 kg/m3 .Kata Kunci : pengaruh, styrofoam, kawat bendrat, kuat tekan, beton ringan
ANALISIS KUAT TEKAN DAN KUAT TARIK BELAH PADA BETON BUSA DENGAN PEMAKAIAN PASIR ABU BATU SEBAGAI AGRERAT HALUS BERE, MARIA DEOLINDA; Simanihuruk, Bertinus; Dewita, Hikma
Jurnal Kajian Teknik Sipil Vol 6, No 2 (2021): JURNAL KAJIAN TEKNIK SIPIL
Publisher : Universitas 17 Agustus 1945 Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52447/jkts.v6i2.5206

Abstract

 Beton busa merupakan salah satu inovasi baru yang dikategorikan ke dalam beton ringan yang mempunyai berat jenis rendah yang semakin banyak digunakan dalam dunia konstruksi di Indonesia. Beton busa tersusun atas bahan – bahan agregat halus,semen,air dan foam agent. Tujuan dari penelitian ini adalah untuk mengetahui kuat tekan dan kuat tarik belah dari beton busa dengan variasi foam agent yang digunakan dan juga pengaruh dari agregat halus yang digunakan yaitu pasir abu batu. Pengujian kuat tekan beton dilakukan untuk mengetahui seberapa baik kualitas beton dalam menahan tekanan atau beban yang akan dipikul. Pengujian kuat tarik belah beton bertujuan untuk mengevaluasi ketahanan geser dan rambatan dari komponen struktur beton. Penelitian ini dilakukan di Laboratorium karena bersifat eksperimen, variasi foam agent yang digunakan adalah 15% dan 30%  dari jumlah semen per m³, pengujian dilakukan pada umur beton 14 hari, 28 hari dan 35 hari menggunakan benda uji silinder 15 cm x 30 cm.  Dari hasil penelitian di dapat Rata – rata kuat tekan berturut – turut menurut umur beton 14 hari, 28 hari dan 35 hari adalah : 23.13 Mpa,  26.25 Mpa, dan 27.78 Mpa (tanpa foam agent), 17.54 Mpa,  20.29 Mpa, dan 21.91 Mpa (foam agent 15%), 13.44 Mpa, 15.11 Mpa dan 16.69 Mpa (foam agent 30%). Rata – rata kuat tarik belah  berturut – turut menurut umur beton 14 hari, 28 hari dan 35 hari adalah : 3.62 Mpa,  4.09 Mpa, dan 4.32 Mpa (tanpa foam agent), 2.93 Mpa,  3.34 Mpa, dan 3.59 Mpa (foam agent 15%), 2.02 Mpa, 2.42 Mpa dan 2.66 Mpa (foam agent 30%). Kesimpulan dari hasil penelitian yaitu semakin banyak variasi foam agent yang dicampurkan semakin rendah kuat tekan dan tarik belah beton busa. Pada penelitian ini yang termasuk ke dalam beton ringan adalah beton busa dengan variasi foam agent 15% dan 30% dengan berat volume maksimum masing – masing 1735.85 kg/m³ dan 1298.11 kg/m³.
Analisis Waktu pada Pekerjaan Tambahan Proyek Pembangunan Gedung PT. Petrokimia Gresik Nurafifah, Nabilah Mawadah; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 1 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i1.16449

Abstract

The time analysis of the additional work of the PT. Petrokimia Gresik Building Construction project aims to determine the delay and acceleration during the implementation of additional work to meet the SLF (Certificate of Functioning) requirements on the work items of emergency stairs, fire extinguisher, GWT and electrical which have a contract value of Rp 3,556,641,848, - with a planned project completion time of 19 weeks located on Jl. Tanah Abang II no. 63, Central Jakarta, DKI Jakarta. In this study using the Earned Value Concept method, which is a method that can analyze time and provide an overview of conditions at the time of realization which includes indicators in the form of BCWS and BCWP. At the time of the implementation of the additional work, in fifth weeks to twelveth seen from the value of the schedule variant (SV) shows a positive number (+) which means the work is carried out faster than planned. However, the evaluation of week 15 to week 17 seen from the schedule variance value (SV) has a negative value (-) which means there is a delay from the plan schedule at the time of implementation. But the delay did not really affect the project completion time at the end because previously there was an acceleration of work. At the end of the SPI calculation, it has a value of 1 = 1, which means that the work implementation time is in accordance with the planned time of 19 weeks.
Analisis Program Keselamatan dan Kesehatan Kerja (K3) serta Pengaruh terhadap Keberhasilan Proyek Pembangunan Gedung PT. Petrokimia Gresik Zulma, Nabillah; Dewita, Hikma; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 1 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i1.16450

Abstract

The Occupational Safety and Health (K3) program is very important in implementing building projects. The possibility of work-related accidents and illnesses is often caused by the contractor's failure to implement the program (K3) as intended. A project can be said to be successful if there are no serious accidents or zero accidents. When implementing a building project, it is important to utilize an effective safety and health management system during construction (SMK3). The aim of this research is to understand SMK3 procedures, determine the impact of implementing SMK3, and determine the main factors that influence the success of PT projects. Petrokimia Gresik regarding building construction. This research is quantitative research using two methods, namely assessment based on Key Performance Indicators (KPI) and data analysis using the multiple linear regression method. The data collection method was through distributing questionnaires and the instrument used was a Likert scale. After conducting an assessment based on the Key Performance Indicator (KPI), the implementation of SMK3 in the PT building construction project. Petrochemicals are in line with targets. Furthermore, the research results show that the influence of occupational safety and health (K3) has a positive impact on achieving PT project objectives. Petrochemicals are affected by safety and health issues which have an impact on better implementation of SMK3. The dominant factor that influences project success based on the variables studied is occupational health.
Co-Authors Arisyi, Luthfan Bangun, Sempurna BERE, MARIA DEOLINDA dan, hamdan Mardiaman Nabiho, Pio Ranap Tua Narto, Heribertus Nur Rohman, Muhammad Nurafifah, Nabilah Mawadah Nurhikmah, Salmah Pio Ranap Tua Naibaho Prisilia, Anggita Sanrach, Handa Dwi Sembiring, Kristina Simanihuruk, Bertinus Xena S P, Canda Zulma, Nabillah