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Journal : Teknisia

ANALISIS PERBANDINGAN PRODUKTIVITAS PEKERJAAN FONDASI DANGKAL DENGAN MATERIAL BLOK BETON DAN PRODUKTIVITAS PEKERJAAN SESUAI SNI 2836:2008 Hari Nuryanto; Setya Winarno
TEKNISIA Vol. XXVI, No. 2, November 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol26.iss2.art2

Abstract

The use of concrete block material instead of rubble stone on shallow foundation work has many advantages. One aspect that needs to be studied is its workforce productivity. This paper aims to elaborate workforce productivity on shallow foundation work with concrete block material and compare its result to Standard of SNI 2836:2008. Data are collected from construction project which has site-wide construction in Krandon and site-narrow construction in Keringan. The method of data collection has been done by direct investigation from the beginning to the end of the foundation project and complemented by photo and video. These findings have shown that workforce productivity on shallow foundation work with concrete block material both in wide-site and narrow site construction is higher than that of SNI Standards, i.e. 48,87% and 7,14% higher, respectively. Moreover, the productivity rate tends to increase due to the learning effect and adaptation on this foundation work done repetitively. There is a learning curve: y=0,1271.ln(x)+0,4818, in which y=productivity rate and x=work session.
Utilization of used white paper for papercrete (mechanical and economic characteristics) Al-Shehari, Waleed Redhwan Mohammed; Winarno, Setya
Teknisia Vol 29 No 2 (2024): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol29.iss2.art4

Abstract

Paper-crete may possibly be a change surface made by combining wasted-paper with customary cement. This function as substitution for schedule concrete and gives central focuses like squander diminishment and the assistance of headway& common impact. This study consider is to degree the compressive and flexural (mechanical strength) of paper-crete, evaluate the making taken a toll of paper-crete, and recognize the idealize paper degree interior the concrete blend based. on both. mechanical and cash related variables. An exploratory think roughly was conducted to see at the mechanical and budgetary properties of paper-crete with grouped paper degrees. White wasted-paper has been joined into the concrete blend. The test fabricate took put at Kaliurang Laoratory. An layout was done to actuate time taken a toll information from particular merchants found close Kaliurang Road. The compressive and flexural qualities of paper-crete are by and broad reduced when white wasted-paper is utilized in paper-crete settling. The quality reduces with developing wasted-paper substance. The comes around appear up that there's not a idealize mix of paper-crete made with white paper for the quality and period taken a toll. The brought of paper-crete made utilizing white waste.paper increments with its composition.
Experimental study on the utilization of raw rice husks as a partial replacement of sand in the production of paver blocks Hakim Muganga; Setya Winarno; Fitri Nugraheni
Teknisia Vol 29 No 2 (2024): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol29.iss2.art6

Abstract

This study explores the potential use of raw rice husks as a partial substitute for sand in the production of paver blocks, addressing the increasing demand for concrete and the overuse of natural resources like aggregates. Rice husks, an abundant waste material in Indonesia, were incorporated into paver blocks made from Portland cement, sand, and raw rice husks. The initial mix ratio was 1 part cement to 8 parts sand, with subsequent mixes gradually replacing sand with rice husks in proportions ranging from 0.5 to 2 parts. The paver blocks were mixed, molded, and compacted, and their properties were tested for compressive strength, water absorption, skid resistance, and abrasion resistance. Five different mix variations were tested, and the production costs were analyzed. The findings revealed that increasing the rice husk content reduced compressive strength but improved water absorption, skid resistance, and abrasion resistance. Additionally, higher rice husk content resulted in lower production costs. The optimal mix, consisting of 1 part cement, 7.5 parts sand, and 0.5 parts rice husks, met all Indonesian standards and demonstrated the best performance. Further research is recommended to assess freeze-thaw resistance and enhance the cost-effectiveness and quality of paver production.
Analisis Fluktuasi Jumlah dan Karakteristik Penumpang Bus Trans Jogja Kondisi Sebelum, Selama, dan Setelah Covid-19 Budi Utomo, Rizki; Winarno, Setya
Teknisia Vol 28 No 2 (2023): Teknisia
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknisia.vol28.iss2.art5

Abstract

Trans Jogja Urban Public Transportation is a form of reform of the subsidized road transport system in the Special Region of Yogyakarta,  which has served the Yogyakarta Urban Area since 2008. Trans Jogja Buses have served 25 sub-districts, with a fleet of 128 buses subsidized by the DIY Regional Government and 44 buses subsidized by the Ministry of Transportation of the Republic of Indonesia. When the COVID-19 pandemic hit in 2020-2021, there was a decrease in people's movements, resulting in a decrease in Trans Jogja Bus passengers. This study aims to analyze the fluctuations of passengers and compare the characteristics of the Trans Jogja Bus passengers in conditions before COVID-19 (in 2019), during COVID-19 (in 2020 and 2021), and after COVID-19 (in 2022). The analysis results show that based on the monthly average, the number of Trans Jogja Bus passengers in conditions during COVID-19 decreased by 54%. After COVID-19, it increased by 12% compared to during COVID-19.  The monthly average number of passengers After COVID-19 is not as regular as in conditions before COVID-19, with a disparity of 50%t. Based on the characteristics of passengers during COVID-19, the proportion of missing passengers is by the professional aspect, namely students/students and civil servants/national soldiers/police. Regarding travel intentions, a relatively large proportion of the missing were college, school, and tourism travel, each decreasing by 7%.