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All Journal Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil BANGUN REKAPRIMA Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS)
Sukoyo Sukoyo
Fakultas Teknologi Industri, KK Sistem Manufaktur, Institut Teknologi Bandung
Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Engineering Industrial & Manufacturing Engineering Social Sciences Transportation Other

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PENINGKATAN EFISIENSI BAHAN STRUKTUR BETON BERTULANG DENGAN PENGGUNAAN VARIASI CAMPURAN MUTU BETON PADA DAERAH TARIK BETON Sukoyo, Sukoyo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 18, No 2 (2013): WAHANA Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v18i2.984

Abstract

In a cross-sectional design of reinforced concrete, is generally assumed to be only 30 to 50% higher cross section work withstand being hit withstand tensile rest. From these assumptions and with the use of the model diagram, meaning there are still opportunities to optimize the function of the concrete with the use of lower levels of the cement mixture. With this method the benefits expected to be obtained and optimally efficient use of cement as an adhesive in the construction of reinforced concrete. Experiments carried out by varying the mix proportion of concrete as high as 50% higher for the cross-sectional area that will receive the attractive force. Of the six variations resulting mixture is made that the flexural strength of concrete as indicated by the flexural strength test results obtained that the bending moment variation cement mix with lower levels do not affect the flexural strength of about 9.2 KNm.
PENGARUH PENAMBAHAN SERBUK BAN BEKAS TERHADAP PARAMETER MARSHALL PADA ASPAL BETON CAMPURAN PANAS LAPIS AUS AC-WC PERKUATAN STRUKTUR KOLOM DAN BALOK AKIBAT PERUBAHAN LAYOUT RUANGAN DENGAN METODE CFRP (STUDI KASUS : PEMBANGUNAN MASJID AS-SHOHABAT TEMBALANG) N S, Danang Prastyo; Prawesti, Ratih; Sugiharto, Sugiharto; Sukoyo, Sukoyo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 23, No 1 (2018): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v23i1.1355

Abstract

This research was conducted to analyse the alternative which might be done to givesolution for column structure reinforcement and bar in case of building room layoutchange. There were 4 methods which were presented for analysing column structurereinforcement and bar in this research. The dimensions of the removed column were25x40 cm with a length of 350 cm and the reinforced beams were 25x40 cm withspan length of 800 cm. This research also showed the price which was gotten fromvarious methods did as consideration of solution chosen. The analysis wasconducted by using SAP2000 application. This analysis was done by 2 columnremoval without reinforcement which in the fact the structure is not powerful if thereis not any reinforcement by the result of 2 column removal so that for safetyanticipation, it is better if reinforcement is implemented. The first method is themethod with the elimination of 2 columns but without the reinforced structure, afterSAP2000 analysis on the portal, obtained the maximum moment that happened was76,1 KN exceeding the permitted moments of 62 KN so that this will be dangerous tothe strength of the structure, therefore for security anticipation should be donereinforcement. The second method which is the first solution is the method ofJacketing Column & Beam obtained the result that the building was considered safeby enlarging the original beam dimensions 25x40 cm to 35x65 cm and the originalcolumns 25x30 cm to 40x40 cm. It is also supported by the value of the momentsshown not exceeding the maximum allowed moments. The third method is analternative to the second retrofit solution by providing additional structuralelements instead of the existing missing columns, but with this method it willinterfere with the aesthetic value of the building, since the new element beams arevery visible. The last method is the use of CFRP (Carbon Fiber ReinforcedPolymer), this method proved to be the most efficient way to overcome the structuralreinforcement problems at As-Shohabat mosque in terms of processing time, laborcost, and sufficient strength to replace the reinforcement that occurs due to thereduction of the column that supports the block.Kata kunci: strengthening column and beam, strengthening structure, CFRP
ANALISIS PENAMBAHAN LEM PUTIH POLY VINYL ACETATE TERHADAP SIFAT FISIK DAN MEKANIK BETON 1PC : 2 PS : 3 KR Harprastanti, Primasiwi; Praharseno, Fikri; Supriyadi, Supriyadi; Sukoyo, Sukoyo; Wasino, Wasino
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 29 No. 1 (2024): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v29i1.5657

Abstract

The rapid development of concrete nowadays demands us to conduct research or further develop previous research. The goal is to produce higher quality concrete products. This research aims to determine the effect of adding Poly Vinyl Acetate white glue to the physical and mechanical properties of concrete with a ratio of 1PC: 2PS: 3KR. This research was conducted at the Materials Laboratory of the Civil Engineering Department, State Polytechnic of Semarang. The concrete produced in this study is in the form of cylinders with a diameter of 15cm, nine in total, and one beam measuring 15x15x60 cm. The samples produced consist of one sample of normal concrete and four samples with PVAc glue mixtures (2.5%, 5%, 7.5%, and 10%). The research results show that the addition of glue has little effect physically. The percentage results of compressive strength of cylinders at 7 days of age with normal concrete are as follows: PVAc 2.5% increased by 12.96%; PVAc 5% increased by 4.78%; PVAc 7.5% decreased by 14.68%; PVAc 10% decreased by 39.57%. At 14 days of age, with normal concrete: PVAc 2.5% increased by 16.66%; PVAc 5% decreased by 3.65%; PVAc 7.5% decreased by 20.93%; PVAc 10% decreased by 52.10%. At 28 days of age, with normal concrete: PVAc 2.5% decreased by 6.13%; PVAc 5% decreased by 13.24%; PVAc 7.5% decreased by 20.69%; PVAc 10% decreased by 48.86%. As for the flexural strength results of beams at 28 days of age, concrete with PVAc content: 2.5% decreased by 32.09%; 5% decreased by 45.56%; 7.5% decreased by 36.51%; 10% decreased by 33.88%. These results are compared with normal concrete.
PENDAMPINGAN PEMBANGUNAN PONDASI JEMBATAN SEBAGAI AKSES PERUMAHAN PERMATA JANGLI TAHAP 2 Sulistiawati, Baiq Heny; Pangesti, Rendy Dwi; Supriyadi, Supriyadi; Fatmawati, Leily; Rahmawati, Roselina; Setyono, Karnawan Joko; Sukoyo, Sukoyo; Mulyono, Tedjo; Sudarmono, Sudarmono; Warsiti, Warsiti
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5584

Abstract

Bridges have a central role as routes that connect between regions, one of which is Permata Jangli Housing Phase 2. Because of the importance of this connectivity, community dedication to repairing bridges is a major concern in efforts to maintain the safety and sustainability of the bridge. This community service examines repair methods for the retaining walls around the bridge to avoid the potential for the bridge to be eroded by water flow. Through the active participation of community members and the implementation of appropriate construction techniques, the results of this collaboration show that the retaining walls around the bridge have been successfully repaired, as well as increasing their resistance to water pressure and erosion. The success of this community service not only improves the quality of life of local residents by ensuring sustainable connectivity, but also empowers communities in efforts to preserve their vital infrastructure. This community service can be an inspiring example for similar efforts in similar housing complexes that face similar challenges in maintaining important infrastructure such as bridges. This underlines the important role of community service in maintaining infrastructure as a key aspect in sustainable development in urban housing.
PERKUATAN STRUKTUR KOLOM DAN BALOK AKIBAT PERUBAHAN LAYOUT RUANGAN DENGAN METODE CFRP Prawesti, Ratih; Prastyo, Danang; Sukoyo, Sukoyo; Nurhadi, Imam; Sulaiman, Sriwahyuningsih
Bangun Rekaprima Vol. 8 No. 2 (2022): Oktober 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.064 KB) | DOI: 10.32497/bangunrekaprima.v8i2.3972

Abstract

Penelitian ini dilakukan untuk mengetahui perkuatan struktur kolom dan balok yang dibutuhkan pada bangunan Masjid Ash-Shohabat di Jl. Banjarsari Selatan, Tembalang, Semarang, karena perubahan pemanfaatan ruang.   Ada 2 kolom berukuran 25x40 cm dengan tinggi 350 cm yang akandihilangkan. Akibat penghilangan kolom ini perlu dilakukan kajian penelitian apakah perlu perkuatan pada kolom dan balok yang masih ada atau tidak. Setelah dilakukan analisis dengan software SAP2000, diperoleh hasil momen maksimal pada ujung - ujung balok 76,1 KNM yang mana ini melebihi momen kapasaitas balok sebesar 62 KNM, sehingga diperlukan perkuatan struktur. Metode perkuatan yang digunakan adalah dengan menggunakan material CFRP (Carbon Fiber Reinforced Polymer), dimana kekurangan tulangan yang diperlukan pada balok tersebut, diganti dengan material CRFP. Dari hasil perhitungan maka diperoleh kebutuhan CRFP sebanyak   2 buah dengan ukuran 220 mm x 1800 mm tebal 0,15 mm yang dipasang pada sisi atas ujung - ujung balok. Waktu yang dibutuhkan untuk pelaksanaan hanya 3 hari dengan biaya Rp3.800.000,-.
OPTIMALISASI PEMANFAATAN LIMBAH PECAHAN BATA UNTUK MENINGKATKAN KETERAMPILAN BATU DI KELURAHAN NGADIRGO KOTA SEMARANG Wicaksono, Teguh Mulyo; Wasino, Wasino; Mukhlisin, Muhammad; Supriyadi, Supriyadi; Sudarmono, Sudarmono; Junaidi, Junaidi; Sukoyo, Sukoyo; Suwarno, Anung; Mahmudi, Wildana Latif; Abdillah, Rifqi Aulia
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5467

Abstract

2022 is the beginning of offline learning after the Covid-19 pandemic. where previously learning was carried out online including practicums. One of the practicums carried out in the Semarang State Polytechnic Civil Engineering department is the masonry practicum which is carried out for semester 1 students. With the offline masonry practicum, the practicum will leave behind brick fragments that can no longer be used. These broken bricks will usually be thrown away at the end of each semester after all the practicums have been carried out. the proportion of brick fragments to intact bricks usually reaches 30% to 40%. The construction workers come from the Ngadirgo community, they learn building work autodidactically based on experience. With the continued development of BSB, there are quite a lot of employment opportunities, including development workers. Techniques and methods of masonry work that comply with construction standards can increase the ability of craftsmen to become skilled workers so that it is hoped that they can improve the welfare of the community around Ngadirgo sub-district, Mijen sub-district. Ngadirgo sub-district currently has a village cemetery which is located in Ngadirgo hamlet RW 2, in this cemetery there is no coffin house which is used to store death equipment including the coffin which is currently still entrusted to one of the residents' house. With the existence of coffin house products made from brick masonry in the village cemetery area.
OPTIMALISASI PEMANFAATAN LIMBAH ABUTA (ABU SEKAM PADI, DAN SERBUK BATA) SEBAGAI SUBTITUSI SEMEN PADA CAMPURAN BETON RAMAH LINGKUNGAN Wicaksono, Teguh Mulyo; Mukhlisin, Muhammad; Fatmawati, Leily; Rahmawati, Roselina; Supriyadi, Supriyadi; Sukoyo, Sukoyo; Sudarmono, Sudarmono; Herlambang, Fajar Surya; Anastasya, Frida
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5681

Abstract

Construction prioritizes the strength of concrete without thinking about the negative impact on the environment. The cement industry is estimated to contribute 5-7% of CO2 gas emissions in the world. On the other hand, Indonesia is also faced with environmental problems caused by various industrial waste. From this problem an innovation emerged, namely ABUTA (husk ash and brick ash). The aim of this innovation is to create a concrete innovation using Abuta Waste (Rice Husk Ash, and Brick Powder). For the manufacture of economical, environmentally friendly concrete to reduce the negative impacts caused by excessive use of cement and reduce industrial waste in Indonesia. In writing this proposal the author used the experimental writing method and data collection method. The concrete innovation applied is concrete with a mixture of variations in the composition of rice husk ash powder and red brick powder of 10% of the cement composition in conventional concrete so that it is more economical and environmentally friendly. In this study, the ACI (American Concrete Institute) mix design method was used with the required design quality of 30 MPa. It is hoped that this innovation can become an environmentally friendly concrete innovation to reduce the negative impacts of excessive cement use and reduce industrial waste in Indonesia. Based on the mix design, the proportion of ash mixture (rice husk ash and brick powder) is 1:1. Meanwhile, the ratio of the amount of ash mixture to cement is 10%: 90%. The compressive strength of concrete with a 0% Abuta mix variation (7 days old) was 19.5, while the concrete innovation with a 10% Abuta mix variation (7 days old) was 15.70 Mpa. This means that the 10% mixture reduces the compressive strength value by 46.28% below the 0% abuta mixture variation. Using a mixture of 10% ash (rice husk ash and brick powder) in innovative concrete can reduce production costs by IDR. 76,700/m ³. Based on the materials obtained in this manufacture, it can be concluded that to obtain optimal compressive strength, better quality materials are needed. The application of concrete can be applied in casting work floors and non-structural construction work such as buildings that require general load power such as housing, sculpture, home interiors and others.
KLASIFIKASI JENIS HASIL PROSES PRODUKSI PAVING BLOCK PADA CV WARINGIN PUTIH, BANYUMANIK SEMARANG SESUAI DENGAN STANDAR NASIONAL INDONESIA (SNI 03- 0691-1996) Rahmawati, Roselina; Sukoyo, Sukoyo; Isnubroto, Danang; Supriyadi, Supriyadi; Wahyono, Herry Ludiro; Santosa, Stefanus; Yusetyowati, Yusetyowati; Sulaiman, Sri Wahyuningsih; Wibowo, Hadi
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 4 No. 1 (2023): Vol. 4 No. 1 April 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v4i1.3914

Abstract

Bata beton atau Paving block adalah suatu komposisi bahan bangunan yang dibuat dari campuran semen Portland atau bahan perekat hidrolis sejenisnya, air, agregat dengan atau tanpa bahan tambahan lainnya yang tidak mengurangi mutu bata beton itu. Hasil proses produksi sangat dipengaruhi oleh faktor produksi, antara lain : kualitas/komposisi bahan baku, peralatan yang dipergunakan untuk memproduksi, langkah- langkah dalam membuatnya sampai dengan perawatan. Proses produksi di CV Waringin Putih ini sangat dipengaruhi oleh permintaan pengguna (pemesan), sehingga sangat memungkinkan hasilnya kurang terkendali (kualitasnya bervariasi). Untuk itu diperlukan pendampingan, agar supaya hasilnya dapat memuaskan konsumen karena biasanya akan menjadikan permintaan (demand) produk tersebut akan bertambah yang berarti akan menambah pendapatan, mengingat kualitas Paving block dari CV Waringin Putih ini betul-betul memenuhi standar. Setelah selesai pendampingan CV Waringin Putih telah terekomendasi bahwa proses produksi Paving block hasilnya memenuhi Standar Nasional Indonesia 03- 0691-1996 dengan hasil Mutu C yaitu paving block tersebut dapat digunakan untuk Pejalan Kaki dan penggunaan lain.
A Dual Resource Constrained Unrelated Parallel Machine Scheduling Model Considering Tardiness and Workload Balance Larasati, Karina Amanda; Sukoyo, Sukoyo; Akbar, Muhammad
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.87-102

Abstract

The proposed study pertains to Multi-Task Simultaneous Supervision Dual Resource Constrained (MTSSDRC), which considers minimizing tardiness and workload balance. The workload balance is calculated using the Workload Smoothness Index (WSI). Additionally, the research concentrates on unrelated parallel machine schedules as they reflect the actual industry conditions in practice. This issue employs three methodologies: Mixed-Integer Linear Programming (MILP), Mixed-Integer Quadratic Problem (MIQP), and Mixed-Integer Quadratically Constrained Programming (MIQCP).  The results in the MILP model focus on the value of total tardiness so that the results obtained have a smaller total tardiness value. However, it is still uncertain that the WSI value is better because no boundaries have been set between the two objective functions to achieve optimal values in the MILP model. The MIQP model focuses on the Workload Smoothness Index (WSI) value to give a limit to the total tardiness objective function. Limit values ​​are obtained from MILP model values, and the resulting WSI value becomes smaller. Moreover, the MIQCP model focuses on the total tardiness value and has limits in the form of permitted WSI. This model produces a small WSI value in accordance with the specified WSI limits while adjusting the specified total tardiness.
Multi-Task Simultaneous Supervision: Dual Resource-Constrained Scheduling Problem in Identical Parallel Machines Considering Differences in Operator Skill Levels Rizka, Afifah; Sukoyo, Sukoyo; Akbar, Muhammad
Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri Vol. 26 No. 2 (2024): December 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jti.26.2.119-130

Abstract

This paper focuses on developing a Multi-Task Simultaneous Supervision Dual Resource-Constrained Scheduling (MTSSDRC) system that considers differences in skill between operators, aiming to minimize makespan and balance operator workload. Workload balance is calculated using the Workload Smoothness Index (WSI). The mathematical model developed uses three techniques: Mixed-Integer Linear Programming (MILP), Mixed-Integer Quadratic Programming (MIQP), and Mixed-Integer Quadratically Constrained Programming (MIQCP). These techniques can handle scheduling cases on a small to medium scale. Results from MILP focus on minimizing makespan, with an additional constraint for calculating the WSI. MIQP focuses on workload balance so that the WSI value becomes an objective function. It also adds a constraint for the allowable makespan value. The result from MIQP shows that the WSI value is lower than in MILP, and the makespan values are equal to the MILP makespan value. Next, MIQCP aims to minimize makespan with a constraint for the allowable WSI value. The MIQCP model produces a makespan value adjusted to a WSI value close to zero. Finally, further analysis is presented regarding the influence of differences in operator skills based on the results of the three models. Based on these models, operators with better skills will be assigned more frequently than others.
Co-Authors Abdul Hakim Halim Anastasya, Frida Anung Suwarno, Anung Bermawi P. Iskandar Fajar Surya Herlambang Hadi Wibowo Harprastanti, Primasiwi Isnubroto, Danang Junaidi Junaidi Karina Amanda Larasati Leily Fatmawati, Leily Muhammad Akbar Muhammad Mukhlisin Mulyono, Tedjo Nurhadi, Imam Pangesti, Rendy Dwi Praharseno, Fikri Prastyo, Danang Prawesti, Ratih Rifqi Aulia Abdillah, Rifqi Aulia Rizka, Afifah Roselina Rahmawati S.Pd. M Kes I Ketut Sudiana . Setyono, Karnawan Joko Stefanus Santosa SUDARMONO SUDARMONO Sulaiman, Sri Wahyuningsih Sulaiman, Sriwahyuningsih Sulistiawati, Baiq Heny Supriyadi Supriyadi TMA Ari Samadhi Wahyono, Herry Ludiro Warsiti Warsiti Wasino Wasino Wicaksono, Teguh Mulyo Wildana Latif Mahmudi, Wildana Latif Yusetyowati Yusetyowati, Yusetyowati