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All Journal Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil
Bodja Suwanto, Bodja
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Transportation

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Kajian Mutu Bata Beton Untuk Meningkatkan Mutu Produksi Dengan Menambah Admixture Suwanto, Bodja
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 17, No 2 (2012): WAHANA Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v17i2.115

Abstract

Concrete blocks produced by local company in Banyumanik region at Pedalangan area are unable to reach its maximum compressive strength, compare to other company production in Semarang city. Testing its concrete block from UD DIPO company in Durian street, resulting of compressive strength on age of concrete 14 days, ?tk = 121.325 kg/ cm2, 21 days ?tk = 131.175 kg/ cm2, and 28 days ?tk = 150.625 kg/ cm2. So if it?s used for street pavement, its cannot handle heavy weight automobile, To increase compressive strength is with improving the quality of mixture material, such as sand, cement, fly ash, and the mixture must be added by WFA as much as 0.02 part, so the mixture of concrete block can be describe = 1 part of cement + 6 part of sand + 0.25 part fly ash + 0.02 part WFA and water added per use. After the concrete block being cast on a dice. then tested its compressive strength on 14 days old, its compressive strength became ?tk = 133.15 kg/ cm2, on the 21 day old it?s the compressive strength became ?tk = 199.525 kg/ cm2, and on the 28 days ?tk = 214.025 kg/ cm2. The result it the compressive strength reach + 40 %
Analisis Perbandingan Ipal Lama Dan Ipal Baru Pada Rumah Sakit Telogorejo Semarang Wardani, Annisa Rizki Yudiya; Kiswari, Kutin Beta; Mukhlisin, Muhammad; Suwanto, Bodja
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 19, No 2 (2014): WAHANA Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v19i2.133

Abstract

Hospital is a health care institution which becomes educational place of research and health workers. On the other side, hospital often potentially causes environmental pollution due to its liquid waste. It is said in Law no 20 year 1990 that ?setiap orang atau badan yang membuang limbah cair wajib mentaati baku mutu limbah cair sebagaimana ditentukan dalm izin pembuangan limbah cair yang ditetapkan baginya?. Therefore, it is necessary to create sewage treatment plant system or STP to manage liquid waste. The system is quite good until encounters overloading. But now, Telogorejo Hospital has upgraded its STP into the newest STP with higher capacity of water treatment. Objectives of this research are to analyze the effectiveness of operational system and procedure of IPAL and also compare the previous IPAL with the newest one on the Telogorejo Hospital. Research method used in this research are interview, observasion, secondary data collecting, and data analyzing. The result shows that the upgrading of the IPAL, from capacity, process and effluent quality, is much more effective.
KARATERISTIK CAMPURAN TANAH LEMPUNG MERAH DENGAN SERBUK BATU BATA PADA BERBAGAI PORSI CAMPURAN UNTUK PENINGKATAN DAYA DUKUNG LAPISAN TANAH DASAR (SUBGRADE) Wahjoedi, Wahjoedi; Suparman, Suparman; Supardjo, Supardjo; Suwanto, Bodja; Mulyono, Tedjo
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 20, No 2 (2015): WAHANA Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v20i2.148

Abstract

The development of increasingly advanced and sophisticated technology especially in terms of automotive technology very rapidly, in addition to models and forms of transport are designed and made with the size of economy class as well as personal, jugaringan and affordable by almost all sections of society. Besides, the welfare of society has been developing quite well, as well as the policy of the system sales of vehicles, both cars and montor that makes it easy for enthusiasts or buyers. So no one promotion through advertising inscribed that Avanza is a car that knows all corners of Indonesia. Relating it is then for the government through relevant agencies, need to pay attention and menyediakanjalan adequate as a means for smooth transportation (traffic) as supporters of pavement, through the compaction of soil material base both without additive or with additives as fillers (filter) to improve gradation of soil particle. The use of the added material should be used from the existing materials in the location (local materials) so it will be cheaper. One of them exploit the potential of local materials (clay combustion products) such as brick dust mixed with clay for the improvement of gradation and changes in physical properties through a reduction in the value of consistency so that the results increase the carrying capacity of the subgrade with CBR testing laboratory by the equation: Unsoaked y = 2,147x + 19.76 with R2 = 0.9144, Soaked 0,6303x + y = 3,924 with R2 = 0.6519, where y = carrying CBR (%), x = percent plus brick powder material.
Co-Authors Kiswari, Kutin Beta Muhammad Mukhlisin Mulyono, Tedjo Supardjo Supardjo Suparman Suparman Wahjoedi Wahjoedi Wardani, Annisa Rizki Yudiya