Pengaruh Abu Ketel sebagai Bahan Penambah Campuran Beton Normal terhadap Kuat Tekan

Much of the kettle ash waste found in palm oil mills is wasted and can pollute the environment. Therefore, efforts need to be made to handle this waste. One of them is its use as an additional ingredient in concrete mixtures. . This research aims to analyze the effect of kettle ash on the rate of increase in compressive strength through laboratory testing with variations in kettle ash used, namely 0%, 5%, 10%, 15% and 20% of the cement weight. The test specimens have dimensions of 15 cm x 15 cm x 15 cm with testing times at 3 days, 7 days, 14 days, 28 days and 56 days. Based on analysis of research data, it was found that the majority experienced an increase in the compressive strength of concrete without additional materials. Increases occurred at 3 days, 7 days, 14 days and 28 days. The percentage increase in compressive strength for the majority decreased at the age of 3 days, 7 days, 14 days. Meanwhile, at the age of 56 days the majority experienced an increase in the percentage of compressive strength which was caused by a quite significant increase in compressive strength. The highest compressive strength at 56 days was produced by test object code BAK 1 of 38.59 MP

Pengaruh Penambah Ekstraksi Bubuk Lindi Hitam Terhadap Limbah Aspal Bekas Pakai

Jalan yang sering dilalui kendaraan berat, mengakibatkan penuaan aspal yang dapat menurunkan kualitas aspal tersebut. Inovasi yang dilakukan, yaitu memanfaatkan limbah aspal yang termodifikasi dengan ekstraksi bubuk lindi hitam atau lignin. Penelitian ini untuk mengetahui karakteristik pengikat aspal bekas pakai dengan tambahan lignin dengan kadar 0%, 3%, dan 6%. Pengujian reologi aspal meliputi berat jenis, penetrasi, daktilitas, titik lembek, viskositas.Penelitian ini menunjukkan bahwa aspal bersifat sangat kaku dan membutuhkan suhu yang sangat tinggi untuk mencair. Hasilnya terbukti dari titik lembek tertinggi (78,5°C pada kadar lignin 6%), penetrasi terdalam (9,33 mm pada kadar lignin 0%), daktilitas terpendek (4,15 cm pada kadar lignin 6%), nilai viskositas yang mendekati spesifikasi bina marga (3592,205 cSt pada lignin 3%), Kesimpulannya, bahan zat aditif lignin mampu membuat aspal semakin kaku dan keras dan tidak baik untuk bahan peremajaan aspal

Karakteristik Arus Lalu Lintas Pada Jalan 2/2 Tidak Terbagi

The conditions of volume, speed, and density are influenced by the interaction of the driver and the vehicle with the road and the environment. One of the way to understand traffic behavior is by describing it in mathematical and graphical form.Through analysis of the relationship between volume, speed, and density can be known information about the current traffic flow conditions. The Greenshield model is used to represent the mathematical relationship between volume, speed, and density. The purpose of the study to analyze the characteristic relationship on 2/2 roads with an undivided type. Based on the results of calculating the mean speed, the service level of this road is type E. The mean speed in the morning is 28.78 km/hour towards Teluk and 25.44 km/hour towards Tanjung Karang. It concluded that the mean speeds of vehicles at this research location are not according to the Regulation of the Minister of the Republic of Indonesia Number 96 of 2015, where for secondary arterial roads with a service level of at least C, namely 60 km/hour.Based on the analysis of the relationship between traffic characteristics using the Greenshield model obtained (r2) = 0,276

Analisis Waste Material pada Tulangan Kolom Berbasis Building Information Modeling (BIM)

This research aims to investigate the influence of implementing BIM concepts on waste material analysis in type 1 and type 2 column reinforcement. Type 1 column reinforcement refers to the reinforcement applied on each floor separately, while type 2 column reinforcement refers to the reinforcement applied every two floors. In this research, the BIM concept is implemented using Autodesk Revit software. The research process begins with data collection, 3D structural modeling, reinforcement modeling, inputting reinforcement schedule marks, clash detection, outputting the Bar Bending Schedule (BBS), cutting lists, and waste material analysis.  The research findings indicate that the total weight of type 1 column reinforcement requirement is 29319.17 kg for D16 and 10232.06 kg for Ø10, with a total weight of waste reinforcement is 2739.17 kg for D16 and 120.64 kg for Ø10. Meanwhile, the total weight of type 2 column reinforcement requirement is 32103.36 kg for D16 and 10232.06 kg for Ø10, with a total weight of waste reinforcement is 6350.03 kg for D16 and 120.64 kg for Ø10. The waste level of type 1 column reinforcement is 9.34% for D16 and 1.18% for Ø10, while the waste level of type 2 column reinforcement is 19.78% for D16 and 1.18% for Ø10. Based on the research findings, it can be concluded that type 1 column reinforcement is more effective and efficient compared to type 2 column reinforcement in terms of the weight requirement and waste generated

Evaluasi Kinerja Struktur Gedung Bertingkat dengan Metode Analisis Pushover (Studi Kasus: Gedung 6 Rumah Sakit Pendidikan Perguruan Tinggi Negeri (RSPTN) Universitas Lampung)

The high potential for earthquake in Indonesia encourages the design of buildings to be resistant towards earthquake vibrations. The level of vulnerability to lateral forces, especially earthquake shocks, is closely related to the height of the building. Therefore, the design of multi-storey building structures must be designed by analyzing earhquake loads with the aim of preventing the building from collapsing and reducing the number of fatalities due to earthquakes. This research takes a case study at Building 6th of the State University Education Hospital of University of Lampung using a performance-based seismic design approach, which involves the use of non linear pushover analysis techniques based on ATC-40 (capacity spectrum method) and FEMA-356 (displacement coefficient method). The result of the pushover analysis are capacity curves, building displacement targets, building collapse schemes, and result of building performance evaluations against earthquake loads based on ATC-40 and FEMA-356 regulations. The analysis result show that the level of building performance in the x-direction and y-direction with the maximum total drift ratio parameter based on ATC-40 and FEMA-356 is Immediate Occupancy, so it can be concluded that the building is still able to withstand when an earthquake occurs and the risk of human loss is very small

Implementasi Building Information Modeling (Bim) Dalam Analisis Waste Material Tulangan Kolom Pada Gedung LVP Production Indonesia

The rapid development of information technology, especially in the construction sector, has become an important issue in supporting the country's infrastructure needs to produce increasingly high-quality, integrated, and efficient infrastructure products. Therefore, the utilization of Building Information Modeling (BIM) technology has become an alternative that allows construction stages to be faster and more efficient, especially in minimizing waste material. This research aims to determine the influence of applying BIM concepts in optimizing waste materials for column reinforcement of type 1, type 2, and type 3. The research begins with data collection, structural 3D modeling, reinforcement modeling, input of reinforcement mark schedules, clash detection, Bar Bending Schedule (BBS) output, cutting lists, and waste material analysis. The research results show that the total weight requirement of type 1 column reinforcement is 28,449 kg, type 2 column is 26,390 kg, and type 3 column is 26,784 kg, while the total waste weight of type 1 column is 1,256.41 kg, type 2 is 872.6 kg, and type 3 is 916.14 kg. The waste level of type 1 column reinforcement is 4.42%, type 2 column is 3.31%, and type 3 column is 3.42%. Thus, it can be concluded that type 2 column reinforcement is more effective and efficient compared to type 1 and 3 column reinforcement

Perbandingan Metode Penentuan Intensitas Curah Hujan (Studi Kasus: Kawasan Wilayah Sukarame Bandar Lampung)

One of the main factors causing flooding in an urban area is rainfall intensity. Perhaps this research has been widely discussed in other studies, but this research was conducted in an area with rainfall characteristics that are different from other areas, so this research is expected to provide further information for flood management and water structure design in related areas. The purpose of the research is to obtain and compare rain intensity methods in order to select a method that is suitable for rainfall characteristics in the sukarame area.  The short-term intensity calculation method uses the Mononobe method because this method only requires maximum daily rainfall data. The calculation of rain intensity approach uses Talbot and Sherman methods to find the appropriate rain intensity method. The results showed that high-intensity rain lasts for a short duration. From the comparison results, different rain intensity analysis results were obtained, this may be due to the use of different settings from each method. It is concluded that the Mononobe method with the Sherman equation is most suitable for rainfall characteristics. Key words : Rainfall Intensity, Mononobe, Talbot, Sherman, IDF Curve

Analisis Tundaan Kendaraan Akibat Weaving Di Jalan Diponegoro Menggunakan Metode Gap Acceptance

The slowing down of vehicle speed that occurs on Jalan Diponegoro is caused by the behavior of vehicles that make intertwining movements (weaving). This condition causes vehicles traveling straight to reduce vehicle speed due to the presence of vehicles entering from Jalan Dr. Cipto Mangunkusumo towards Jalan Diponegoro. Queues that occur on Jalan Diponegoro cause a narrowing of the road, which can cause travel delays. The aim of this research is to analyze travel delays due to interwoven conflicts or weaving that happened on Jalan Diponegoro. This research was analyzed using the method gap acceptance. According to the results of data processing analysis and literature studies, the delay time was 23.28 seconds in the morning and 13.77 seconds in the afternoon for each 5 minute time interval. Key words: Travel Delay, InterwovenConflict, Gap Acceptance

Quantity Material Take Off Penulangan Kolom Zona B Gedung Perawatan Bedah Terpadu RSUD Dr.H. Abdul Moeloek dengan Building Information Modelling (BIM)

In this era of globalization, technology is growing rapidly in all aspects of life, including in the field of infrastructure. Technological developments in the field of infrastructure can be seen from the many softwares that facilitate development work. The software then comes packaged in a program called Building information Modeling (BIM). One of the software of Building information Modeling (BIM) is a Autodesk Revit which is able to automatically generate Material Quantity Take Off (QMTO) which is used by contractors in making Bill Of Quantity (BOQ). in Quantity Material Take Off (QMTO) an important aspect that must be considered is reinforcement or reinforcement work. Therefore, the researchers reviewed the Quantity Material take Off (QMTO) reinforcement, especially the column in the integrated surgery building, RSUD Dr. H. Abdul Moeloek. Based the research that has been done using Autodesk Revit software, there are difference in the value of column reinforcement volume between calculations using conventional methods. Base of the results of the analysis, the value of column reinforcement volume with conventional methods is greater than using the BIM-based method with percentage difference of 6,54 %. In addition, the percentage of waste material is quite large, namely 9,61 %. Key words : Building Information Modeling (BIM), Autodesk Revit, Quantity Material Take off (QMTO), column reinforcement, Waste Material . Di era globalisasi ini, teknologi semakin berkembang pesat di seluruh aspek kehidupan termasuk dalam bidang infrastruktur. Perkembangan teknologi di bidang infrastruktur dapat dilihat dari banyaknya software-software yang memudahkan pekerjaan pembangunan. Software-software tersebut kemudian hadir dalam kemasan sebuah program yang disebut Building Information Modelling (BIM). Salah satu software dari Building Information Modelling (BIM) adalah Autodesk Revit yang mampu secara otomatis menghasilkan Quantity Material Take Off (QMTO) yang digunakan kontraktor dalam pembuatan Bill Of Quantity (BOQ). Pada Quantity Material Take Off (QMTO) aspek penting yang harus diperhatikan adalah tulangan atau pekerjaan penulangan. Oleh karena itu peneliti meninjau Quantity Material Take Off (QMTO) penulangan khususnya kolom pada Gedung Bedah Terpadu RSUD Dr. H. Abdul Moleoek. Berdasarkan penelitian yang telah dilakukan menggunakan Software Autodesk Revit terdapat perbedaan nilai volume penulangan kolom antara perhitungan menggunakan metode konvensional dan metode berbasis BIM. Berdasarkan hasil analisis didapat nilai volume penulangan kolom dengan metode konvensional lebih besar dibandingkan dengan menggunakan metode berbasis BIM dengan selisih persentase sebesar 6,54 %. selain itu didapatkan hasil persentase waste material yang cukup besar yaitu 9,61 %Kata kunci : Building Information Modelling (BIM), Autodesk Revit, Quantity Material Take Off (QMTO), Tulangan Kolom, Waste Material

Daya Lenting Akar Mangrove Rhizophora sp. sebagai Peredam Gelombang (Studi Kasus Pantai Dewi Mandapa, Pesawaran)

Hutan mangrove adalah sekelompok pohon atau tumbuhan yang hidup dengan kesamaan adaptasi morfologi dan fisiologi terhadap habitat yang dipengaruhi pasang surut. Gelombang laut menyebabkan abrasi di sekitar pesisir pantai. Daya lenting mangrove memberikan kontribusi besar terhadap peredam gelombang.Tujuan penelitian adalah untuk mengetahui daya lenting akar tunjang mangrove Rhizophora sp. sebagai peredam gelombang.Metode digunakan pada penelitian ini adalah metode Transek-kuadrat oleh Wantasen tahun 2002 untuk menghitung cakupan daerah penelitian. Pengujian dilakukan menggunakan alat Control Universal Testing Machine dan dilakukan uji tarik untuk mendapatkan nilai gaya yang dapat ditahan oleh satu akar mangorve. Hasil pengolahan di peroleh pada ketebalan 10 meter, kelentingan akar tunjang mencapai 2,7380E+03 J/m2 dengan energi gelombang yang bisa ditahan sebesar 2,97726E-01 J/ms. Namun, pada ketebalan 50 meter, kelentingan turun menjadi 2,2041E+03 J/m2 dengan energi teredam sebesar 2,99245E-01 J/ms. Kesimpulannya adalah daya lenting akar tunjang oleh mangrove Rhizophora sp memiliki data lenting yang baik dalam meredam gelombang, daya lenting akar mangorve akan meningkat seiring dengan bertambahnya jumlah akar mangrove pada suatu area sehingga energi peredaman meningkat