Prabowo Setiyawan, Prabowo
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Islam Sultan Agung Semarang Jl. Kaligawe, KM 4, Semarang

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PEMANFAATAN SERBUK ECENG GONDOK SEBAGAI CAMPURAN BETON MUTU TINGGI anam, Syaiful; S, Nurul ilmiyati; R.M, Ravendra; P, Rochim Putra; Setioboro, Slamet; Setiyawan, Prabowo
Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Vol 1, No 1 (2015): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 6 2015
Publisher : Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik

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Semen merupakan bahan yang sangat penting dalam pembuatan beton.Pembuatan beton yang baik juga bergantung pada agregat yang digunakan.Penggunaan bahan tambahan kimia sesuai kebutuhan untuk memperkuat hasil beton pun dilakukan demi menghasilhan beton mutu tinggi. Kandungan Eceng Gondok yang memiliki senyawa kimia yang sangat berperan penting dalam pembuatan semen menjadikan Eceng gondok dimanfaatkan untuk dibuat serbuk yang akan digunakan sebagai campuran pembuatan beton. Kandungan dalam serbuk eceng gondok memiliki kesamaaan unsur penyusun dengan semen sehingga dengan penambahan serbuk eceng gondok pada campuran beton maka dapat dihasilkan beton mutu tinggi. Kandungan Kimia Eceng gondok mengandung unsur SiO2, kalsium (Ca), Magnesium (Mg), Kalium (K), Natrium (Na), Chlorida (Cl), Cupper (Cu), Mangan (Mg), dan Ferum (Fe). Dengan memiliki unsur tersebut terdapat kesamaan dengan unsur pembentuk dari semen yaitu Trikalsium Silikat (C3S) atau 3CaO.SiO2, Dikalsium Silikat (C2S) atau 2CaO.SiO2, Trikalsium Aluminat (C3A) atau 3CaO.Al2O3, Tetrakalsium Aluminoferit (C4AF) atau 4CaO.Al2O3.FeO3. Pemanfaatan eceng gondok sebagai bahan tambahan pencampuran beton mutu tinggi dapat menjadi solusi yang tepat, untuk Mendapatkan biaya yang murah dengan mutu yang terbaik. Kata Kunci : Beton,Eceng gondok, Semen
Shear Failure Mechanisms of Steel Fiber RC Beams at Elevated Temperatures Setiyawan, Prabowo; A, Antonius; S, Sumirin; Widianto, Aref
Journal of Advanced Civil and Environmental Engineering Vol 1, No 1 (2018)
Publisher : Universitas Islam Sultan Agung

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This paper presented an experimental tests for 12 reinforced concrete beams test contained low steel fiber volume in post-burn conditions. Beam experiments were designed in such a way in order to the collapse mechanism of one point load behaved dominant in shear failure. The main parameter that was reviewed in the experiment was spacing of shear reinforcement and temperature (normal, 300oC, 600oC, 900oC). Result of the experiment showed that the collapse mode of specimens at all temperatures was not pure shear. This was signified by the appearance of cracks that occurred around the middle of the span before the beam was crushing. This behavior indicated the role of steel fibers in increasing the shear capacity of beams. 
STUDI EKSPERIMENTAL SIFAT-SIFAT MEKANIK BETON NORMAL DENGAN MENGGUNAKAN VARIASI AGREGAT KASAR ., Mujahidin; ., Antonius; Setiyawan, Prabowo
Prosiding Seminar Nasional Inovasi Dalam Pengembangan SmartCity Vol 1, No 1 (2017)
Publisher : Prosiding Seminar Nasional Inovasi Dalam Pengembangan SmartCity

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Abstract

ABSTRAKBeton terdiri dari 4 komponen dasar pembentuk beton yaitu campuran antara semen, agregat kasar, agregat halus  dan air. Untuk mengetahui dan mempelajari perilaku masing-masing bahan penyusun beton tersebut memerlukan pengetahuan bagaimana karakteristik bahan yang akan dibuat sebagai penyusun beton tersebut. Dalam penelitian ini ingin mengetahui sifat-sifat mekanik beton normal dengan menggunakan mix design beberapa jenis agregat kasar.Analisis data yang kami gunakan adalah analisa data secara kualitatif yaitu dengan menginterpretasi tabel-tabel, grafik-grafik, atau angka-angka yang ada kemudian melakukan uraian dan penafsiran. Dalam penelitian ini menggunakan sampel sebanyak 108 dengan menggunakan mutu beton K-250, dibuat  2 kelompok dan 5 jenis mix design sehingga dari hasil pengelompokkan tersebut dapat dengan mudah dibuat analsis hasilnya.Dari hasil penelitian benda uji beton mutu K-250 dapat disimpulkan bahwa agregat kasar yang ukuran gradasinya 1-2 mempunyai sifat-sifat mekanik yang hasil yang lebih baik daripada agregat kasar yang ukuran gradasinya 2-3 baik pada kuat tekan beton, modulus of rupture dan modulus elastisitas.Hasil benda uji beton berdasarkan sifat-sifat mekanik beton dapat disimpulkan bahwa:Ø Sampel F (25% kricak manual + 75% kricak pecah mesin) dengan agregat kasar ukuran 1-2 menghasilkan kuat tekan beton paling tinggi sebesar 276,66 Kg/cm2 dari standar rencana beton yang dibuat K. 250 Kg/cm2.Ø Sampel F (25% kricak manual + 75% kricak pecah mesin) dengan agregat kasar ukuran 1-2 menghasilkan modulus of rupture paling tinggi sebesar 15,91 Kg/cm2.Ø Sampel F (25% kricak manual + 75% kricak pecah mesin) dengan agregat kasar ukuran 1-2 menghasilkan modulus elastisitas  paling tinggi sebesar 15.944,80 Mpa. Kata kunci: Beton, benda uji, sifat-sifat mekanik beton normal
PLANNING CONCEPT OF RISK MANAGEMENT IN CONSTRUCTION PROJECT faraj Nasr, Nafaa Alfaitouri; ., Pratikso; Setiyawan, Prabowo
Prosiding Seminar Nasional Inovasi Dalam Pengembangan SmartCity Vol 1, No 1 (2017)
Publisher : Prosiding Seminar Nasional Inovasi Dalam Pengembangan SmartCity

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Abstract

Construction project has many risks; therefore it should be managed correctly and implemented from start to finish. Risk management is the correct way to minimize the risk in construction project. In the context of managing risk, people in construction company can analyze the risk that may happened with SWOT analysis as a tool to observe and determine strategy.Keyword: SWOT analysis, risk management, construction project
Cold-Formed Steel Technology in Building Structure and its Problems as an Alternative Solution of Corrosion Resistant Structures at Coastal Areas Setiyawan, Prabowo
International Conference on Coastal and Delta Areas Vol 1, No 1 (2015): Management and Engineering in the Sustainable Development on Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

This paper aims to determine the technological development of cold-formed steel ishappening today and the problems of its application especially on the building structures. The coldformed steel structures have become alternative could be used in coastal areas due to its corrosion resistant properties. The development of the cold-formed steel use on structures is reviewed. In addition, the advantages and lacks of the cold-formed steel structural members are presented based on the research conducted previously. It is concluded that cold-formed steel technology has great potential to be developed and be applied to building structure even some problems arised have to be overcome especially regarding to local buckling and low capacity of the connection
Design Of Pavement Using Buton Natural Rock Asphalt Stabilized Subgrade Soil Rizkiyawati, Lely; Nastiti, Wilujeng Ashri; Rusbintardjo, Gatot; Setiyawan, Prabowo
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

The performance of pavements is governed by the strength of the subgrade, because subgrade is roadbed soil where the pavement structure is laid. If bearing capacity of the subgrade high, deformation of pavement will not occur and it is not easy to deteriorate. In the contrary, if bearing capacity of the subgrade low, pavement deformation will occur and pavement will deteriorate. This research have objectives to analysis the pavement structure of using existing subgrade soil and using subgrade stabilized with Buton Natural Rock Asphalt (BNRA).  The road connecting Semarang - Purwodadi where always in worst condition was used for study in this research. Semarang – Purwodadi road is laid over montmorillonite expansive clay with lower bearing capacity or have low CBR value only 1 to 2 %. To analysis the pavement structure, both flexible and rigid pavement, AASHTO 1993 pavement design are used. The result show that flexible pavement structure laid over stabilized soil have thinner pavement structure compare to the one laid over the subgrade of original expansive clay soil. Similarly for rigid pavement, the thick of concrete slab over the subgrade of expansive clay is 30 cm, and if laid over the subgrade of stabilized expansive clay with Buton Natural Rock Asphalt (BNRA) is only 25cm. It can be concluded that Buton Natural Rock Asphalt (BNRA), have significant influence to the strength and bearing capacity of expansive clay soil.  Keywords: asbuton, stabilized subgrade, expansive clay soil, AASHTO
ALTERNATIVE SOLUTION TO OVERCOME THE CORROSION OF CRROSIVE ENVIRONMENT STRUCTURES Setiyawan, Prabowo
International Conference on Coastal and Delta Areas Vol 1, No 2 (2015): the 2th International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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This paper aims to understand the cost-effective methods of corrosion problems solutions of structures constructed at corrosive areas. The solution is basically done by providing additional layer on the steel or concrete structural components. The study was done by reviewing the existing design standards and the research results conducted by the previous researchers as well as the publications issued by the company concerning on the corrosion problems solutions. It can be concluded that the corrosion problems decreasing the structural strength as well as life of the structure can be caused by chloride/carbonation, contact with water (moisture) and contact with oxygen. It can also be inferred that regarding to the purpose the corrosion problems solutions could be classified as corrosion protection, types of application and longevity. In addition, the chosen method and the product used to overcome the corrosion problems of the structures are affected and should be considered the local environment especially related to the chloride concentration, concrete properties, humidity and temperature.Keywords: steel structure, concrete structure, corrosive environments, corrosion problems solutions