Teknikhttps://repository.uhn.ac.id/handle/123456789/592024-03-29T13:41:07Z2024-03-29T13:41:07ZPengelolaan Limbah Konstruksi Di JakartaLumbangaol, Partahihttps://repository.uhn.ac.id/handle/123456789/36802020-02-11T03:28:29Z2013-01-01T00:00:00ZPengelolaan Limbah Konstruksi Di Jakarta
Lumbangaol, Partahi
This paper deals with construction waste management in Jakarta and its relation to urban solid waste management issues. As the largest industry in any economy, construction industry is a major consummer of natural resources and a major generator of solid waste. Attempts to reuse its waste stream would considerably reduces its natural resources consumption. Despite the fact, information and studies on the management of this waste stream in Jakarta has been very limited. Observations and interviews with contractor and waste trader/transporter in Jakarta reveal that the management of this waste stream has been carried out by waste trader/transporter in the absence of government policy and regulation. Waste generated from one construction project is usually re-used by other projects. In between these projects a network of waste trader/transporter are actively seeking and channelling the waste material. Factors giving rise to these (re-use) activities consist of factors internal to the waste materials and factors external to waste materials. The former includes quantity, quality of waste material, and distance/location where waste are generated. The later includes the readily available low cost labor, incremental method of housing construction, as well as the high demand on housing in Jabotabek.
2013-01-01T00:00:00ZANALISA KARAKTERISTIK GETARAN TRUK MOLEN KAPASITAS 3-5 METER KUBIK BETON COR BERDASARKAN KECEPATAN 30;45;50 (KM/JAM) UNTUK DAERAH HORIZONTAL, LONGITUDINAL DAN VERTIKAL BERDASARKAN TIME DOMAINSihombing, SuriadyGinting, Sibukhttps://repository.uhn.ac.id/handle/123456789/22262019-06-01T09:33:41Z2017-02-13T00:00:00ZANALISA KARAKTERISTIK GETARAN TRUK MOLEN KAPASITAS 3-5 METER KUBIK BETON COR BERDASARKAN KECEPATAN 30;45;50 (KM/JAM) UNTUK DAERAH HORIZONTAL, LONGITUDINAL DAN VERTIKAL BERDASARKAN TIME DOMAIN
Sihombing, Suriady; Ginting, Sibuk
Convenience and safety at a time when driving is a very needed by the users of transport services. Measurement of vibration is one way that can be done to monitor the level of comfort in driving and further by vibration analysis can be known exactly if any interruption occurred during in the course. Therefore, researchers want to find out how the analysis of the vibration characteristics of truck molen capacity 3-5 cubic meters of concrete cast based on the speed of 30; 40; 50 (Km/h) for Horizontal areas; Longitudinal and vertical based on time domain on line travel Toll-free from Belawan-Tanjung Morawa. Measurement of the overall response of vibration on engine block buffer tube mixer for diesel-fueled trucks molen capacity 3m3, 5m3 at a speed of 30 .40, 50 km/h axial direction, vertical and horizontal obtained the largest Deviations obtained at capacity 5m3 horizontal direction with the highest price 138 x 10-6 m (138 μm) at a time when seconds to 44 with a speed of 50 km/h lowest price, while the axial direction 4.5 x 10-6 m (4.5 μm) at the time of 12 seconds to speed of 30 km/h on the capacity 5m3. The greatest speed is obtained at 5m3 capacity horizontal direction represents the highest price 5.47 mm/sec at the time seconds to 44 with a speed of 50 km/h, while the lowest axial direction of 0.1 mm/sec at a time of 12 seconds to a speed of 40 km/h. The greatest acceleration is obtained at capacity 3m3 horizontal direction represents the highest price of 5.30 mm/sec2 at the time of seconds to 40 with a speed of 50 km/h, while the lowest horizontal direction 1.55 mm/dtk2 at the time of 12 seconds to a speed of 30 km/h at 5m3 capacity.
So From standard ISO 10816-3 for the price of 5.47 mm/sec velocity vibration on engine block buffer tube mixer for diesel-fueled trucks molen capacity 3m3, 5m3 with the category of heavy machinery (large) included in Zone B young, green vibration from the engine well and can be operated without restrictions.
2017-02-13T00:00:00ZPengaruh Waktu Tahan dan Laju Pemanasan Terhadap Besar Butir Austenit Dan Kekerasan Pada Proses Heat Treatment Baja HSLANapltupulu, Richard A.M.Manurung, Charleshttps://repository.uhn.ac.id/handle/123456789/20602019-02-12T07:31:03Z2014-02-01T00:00:00ZPengaruh Waktu Tahan dan Laju Pemanasan Terhadap Besar Butir Austenit Dan Kekerasan Pada Proses Heat Treatment Baja HSLA
Napltupulu, Richard A.M.; Manurung, Charles
Pengontrolan mikrostruktur akhir (ferit) yang baik merupakan salah satu cara yang efektif untuk mendapatkan baja karbon dengan sifat mekanis yang baik. Struktur butir yang diinginkan pada mikrostruktur akhir bergantung pada ukuran butir awal yang terbentuk selama proses pemanasan awal dan pembentukannya, dimana untuk mendapatkan butir ferit super halus, maka harus terbentuk butir prior austenit yang super halus saat proses pemanasan awal. Untuk itu dibutuhkan suatu proses yang dapat mengontrol mikrostruktur baja karbon selama proses pemanasan awal serta pendinginan.
Pada proses pemanasan awal, butir pearlit akan bertransformasi menjadi butir austenit yang kan mengalami proses rekristalisasi dan tumbuh. Apabila butir austenit sempat bertumbuh menjadi besar, maka butir ferit akhir juga akan memiliki ukuran yang besar dan sifat mekanisnya akan menurun. Oleh sebab itu perlu suatu perhatian khusus pada pembentukan dan pertumbuhan butir prior austenit pada proses pemanasan awal (reheating) agar diperoleh ukuran mikrostruktur akhir yang memberikan sifat mekanis yang maksimal.
Penelitian ini ditujukan untuk mengetahui pengaruh parameter proses pemanasan awal yang meliputi laju pemanasan dan waktu tahan terhadap pertumbuhan butir austenit dan sifat mekanis materialnya (kekeresan) pada temperatur 1120oC. Dari hasil penelitian diperoleh hasil bahwa ada hubungan yang saling terkait antara laju pemanasan dan waktu tahan terhadap pertumbuhan butir austenit dan kekerasan yang terjadi. Sementara itu model
untuk pertumbuhan butir austenite pada temperatur 1120°C adalah 198,98.Hr-0•201.t°,057.
2014-02-01T00:00:00Z