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Journal : TEKNIK

Technical and Economic Analysis of Ship Launching with Slipway and Airbag KM. Sabuk Nusantara 72 in PT. Janata Marina Indah Shipyard Semarang Sugeng, Sunarso; Ridwan, Mohammad; Suharto, Suharto; Khristyson, Samuel Febriary
TEKNIK Vol 41, No. 3 (2020): December 2020
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v41i3.33710

Abstract

In a ship planning can not be separated from the planning of the ship launching process. A ship can glide perfectly if it has a high enough planning time and costs. The launch process itself is divided into several ways. The choice of this method needs to be considered because it relates to the budget and preparations made. The method used is the calculation according to the numerical approach assisted by computational software. In the first calculation it is planned with the slipway launch, and then the next one is planned with the airbags that have been implemented previously. The purpose of this study is to provide analysis results as a consideration in implementing the slipway and airbag ship launching method on KM ships. Belt Nusantara 72 measuring 2000 DWT. In steps 5 to 6, both the slipway and the airbags experience a stern lift condition with a value (yVd) of 1396.97 ton.  Based on the economic analysis of the hours of people using airbags, there is a decrease in working hours by 44% when compared to the launch using a slipway. This also happened to work productivity where it was 84% more time effective. When viewed from an investment point of view, the use of slipways is actually more economical than airbag, the difference is 43% more economical using slipways. Both types of launch can be applied by looking at the economical side and the ability of each shipyard in carrying out the launching process and seeing the main size of the ship to be launched.
Analysis of Fine Glass Waste Addition as a Filler Material for Sand Substitution on the Properties of Mortar Products Suharto, Suharto; Amin, Muhammad; Al Muttaqii, Muhammad; Marjunus, Roniyus; Fitri, Nuzullia; Suhartono, Suhartono
TEKNIK Vol 42, No. 3 (2021): December 2021
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v42i3.32686

Abstract

Inorganic glass waste can replace sand in mortar production due to its SiO2 content being greater than 70%. This study aims to analyze the increase in mortal product agility due to the substitution of sand and reducing environmental pollution. The fine glass waste used is restrained on 80 and 120 mesh sieves. The fine glass waste substitution variations are 0, 10, 20, 30, 40, and 50% of the sand weight. The results show that fine glass waste could be used as a material for sand substitution because of the content of SiO2 of 73.8%. The results from XRD indicate that the phase of fine waste glass is amorphous. The mortar was printed with a 5x5x5 cm cube mold, and it was soaked for 7, 14, and 21 days. Based on the results, the compressive strength with a high value of 13.58 MPa at 20% fine glass waste substitution and 120 mesh. The density of 2.8±0.8 g/cm3, porosity 4.40±0.001%, and absorption 2.83±0,0009%. The compressive strengths, density, porosity, absorption, XRF and XRD characterization were evaluated. The results showed that the SiO2 compound in waste glass with the right composition of 20% could significantly increase the compressive strength. Phase formation of Calcite (CaCO3), Quartz (SiO2), and Portlandite (Ca(OH)2) was formed from the results of XRF characterization
Co-Authors A.A. Ketut Agung Cahyawan W Abd Rahman Adi Antoni ADY RAHMANTO, DHIDHIN NOER Afandi, Faisal Fari' Al Muttaqii, Muhammad Alamsyah, Mahdelia Fa’iq Anak Agung Ketut Sudharmawan Andari, Imelda Tri Ardiyanto, Jefri Arintina Rahayuni Arpandjam’an, Arpandjam’an Arum Purnaningtyas Arwinda Nugraheni Azzahra. M, Sitti Fatimah Bagus Prabowo, Yoghi Bagus Susetyo Dewannata, Danial Aghnia Dewi Retno Suminar Dewi, Cicilia Dikna Astrina DS, Priyarsono Durahim, Darwis Dwi Fajriyati Inaku, Dwi Fajriyati Eddy Soewandojo Eko Saputra Emdat Suprayitno Ervin Oktavianingtyas Faizah, Iva Fandanu, Rifky Fatkhurrohman, Ali Fauzul Hanif Noor Athief Feerzet Achmad Fitri, Nuzullia Fitriani Pramita Gurning Harahap, Desi Marwiyah Hardi Warsono Hardiyan, Rizki Candra Hendrik Hendrik Herlambang, Agam Hidayat, Ahmad Khilmi Hukama, Ikhwan Ibrahim Latepo Innawati Jusup Irianto, Sugeng Kipa Jundapri Kurniawan, Cessna Kushandayani, Kushandayani Kustiarana Willyandhika, Kustiarana La Ode Muh Munadi Lisnurani, Lisnurani Margaretha, Christine Marjunus, Roniyus Meliana, Dita Mimbadri, Yuris Moeljahwati, Endah Muchti Yuda Pratama Muh. Ibnan Syarif, Muh. Ibnan Muhammad Amin Muhammad Iqbal Fasa Muhammad Lukman Ngaliman, Ngaliman Nita Rukminasari Nunung Ernawati Nur Hidayati P. Fans Pebrianthy, Lola Pratama, Febrya Yoga Prihartini Prihartini Qomaruddin, M. Bagus Rahma, Maulidia Rahmadi Tambaru Ramba, Yonathan Reni Yuniarti Samiadji, Samiadji Samuel Febriary Khristyson Santosa, Teguh Budi Saragih, Imelda Margaretha Sarana Sarana setiawan, Darma Setiyawan, Trio Sigalingging, Marhaban Siswanto, Edy Siti Aesijah Skripsa, Tira Hamdillah Soesaptri Oediyani Solly Aryza Sri Ambarwangi Subroto, Agus Suhartono Sulaiman Sulaiman Sulianti, Wulan Murni Sulianti, Wulan Murni sulistyaningtyas, ummun nesya Suminar, Ratna Sunarso Sugeng Suryanto Suryanto Susi Dwi Widyawati suwarni, putri Thomas Saputro, Thomas Totok Prasetyo Tri Yuniningsih Trias Andati Uli Silalahi, Yuni Uli Silalahi Usman Hadi Wahyu Lestari Wattimena, Riles Melvy Widodo Sarjana AS, Widodo Yandono, Prayudo Eri Yandono, Prayudo Eri Yofita Sandra, S.Pd., M.Pd., Zico Farlin, Dr. Budiwirman, M.Pd., Yuliastutik, Lilik Yulis Setiya Dewi Yuliyani Yuliyani, Yuliyani