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All Journal Journal of Engineering and Technological Sciences Jurnal Teknik Sipil AGREGAT Portal: Jurnal Teknik Sipil Jurnal Kacapuri : Jurnal Keilmuan Teknik Sipil Jurnal Pengabdian Masyarakat Inovasi Indonesia
Ivindra Pane
Department Of Civil Engineering, Bandung Institute Of Technology, Jalan Ganesha 10, Bandung 40132, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Public Health Social Sciences Transportation

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Confinement of Reinforced-Concrete Columns with NonCode Compliant Confining Reinforcement plus Supplemental Pen-Binder Kristianto, Anang; Imran, Iswandi; Suarjana, Made; Pane, Ivindra
Journal of Engineering and Technological Sciences Vol 44, No 3 (2012)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.434 KB) | DOI: 10.5614/itbj.eng.sci.2012.44.3.2

Abstract

Abstract.  One  of  the  important  requirements  for  earthquake  resistant  building related  to  confinement  is  the  use  of  seismic  hooks  in  the  hoop  or  confining reinforcement  of  reinforced-concrete  column  elements. However, installation of a  confining  reinforcement  with  a  135-degree  hook  is  not  easy.  Therefore,  in practice, many construction workers apply a confining reinforcement with a  90-degree  hook  (non-code  compliant).  Based  on  research  and  records  of  recent earthquakes  in  Indonesia,  the  use  of  a  non-code  compliant  confining reinforcement  for  concrete  columns  produces  structures  with  poor  seismic performance.  This paper  presents a study  that  introduces  an additional element that is expected to improve the effectiveness of concrete columns confined with a non-code compliant  confining reinforcement. The additional element, named a pen-binder,  is   used to keep the  non-code compliant  confining reinforcement in place. The effectiveness of this element  under pure axial concentric loading  was investigatedcomprehensively.The  specimens  tested  in  this  study  were  18 concrete columns,with a cross-section of 170 mm x 170 mm and a height of 480 mm. The main test variables were the material type of the  pen-binder, the angle of  the  hook,  and  the  confining  reinforcement  configuration.The  test  results indicate  that  adding  pen -binders  can  effectively  improve  the  strength  and ductility of the column specimens confined with a non-code compliant  confining reinforcement. 
On the Development of a Nomogram for Alkali Activated Fly Ash Material (AAFAM) Mixtures Simatupang, Partogi H.; Imran, Iswandi; Pane, Ivindra; Sunendar, Bambang
Journal of Engineering and Technological Sciences Vol 47, No 3 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.159 KB) | DOI: 10.5614/j.eng.technol.sci.2015.47.3.1

Abstract

Alkali activated fly ash material (AAFAM) has become the most promising material to substitute materials based on ordinary Portland cement (OPC). However, there is no available nomogram for AAFAM mixtures. In contrast, there are many rational methods available in the literature to make paste, mortar and concrete with OPC based materials, such as Monteiro-Helene’s nomogram, which uses Abram’s law, Lyse’s law and Molinari’s law. This paper presents a study to construct such a nomogram for AAFAM mixtures by first conducting experiments on the  paste and mortar phases. The procedure of Monteiro-Helene’s nomogram was adopted in this formulation. The first step in this direction was to find a close relationship between the strength and paste composition of the material that can be used as a substitute for Abram’s law. The second step  was  to construct the equivalent  of  Lyse’s and Molinari’s relationships by varying the sand and fly ash contents. The results show that it is possible to make a nomogram for AAFAM mixtures such as the one for OPC based materials. Class F fly ash and its mortar phase were used to construct the nomogram. In addition, the  mortar  samples  that were  used to build the nomogram had similar solidification products according to their microscopic characteristics.
Kekuatan Riset Multiskala dalam Membentuk Teknologi Infrastruktur Masa Depan Pane, Ivindra
Jurnal Teknik Sipil Vol 15, No 1 (2008)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (800.202 KB)

Abstract

Abstrak. Riset multiskala adalah bidang riset yang mengeksploitasi beragam fenomena fisika dan kimia yang terjadi pada berbagai skala observasi. Yang menjadi perhatian utama dalam riset ini adalah skala observasi berpengaruh terhadap tingkat pemahaman mengenai suatu fenomena fisika atau kimia. Pemahaman yang mendalam biasanya didapat setelah observasi pada skala yang lebih kecil (mikron- maupun nano-meter) yang dapat dilakukan pada suatu bahan/sistem buatan manusia maupun bahan/sistem di alam. Riset multiskala dikenal menghasilkan terobosan-terobosan dalam bidang iptek. Contoh yang sangat nyata adalah pelapis anti basah yang dihasilkan dari rekayasa struktur permukaan sehingga butiran cairan membentuk sudut kontak < 900 (non wetting), jenis pelapis yang tahan terhadap suhu sangat tinggi yang disebut pelapis pelindung panas (thermal barrier coating), dan semen pemakan polutan yang mengandung titanium dioksida yang dapat mempermudah proses dekomposisi polutan di udara. Contoh-contoh ini setidaknya ini dapat mengilhami kita akan potensi dari riset multiskala pada aplikasi teknologi infrastruktur. Tulisan ini mengetengahkan hasil riset multiskala terutama yang erat hubungannya dengan perkembangan teknologi infrastruktur. Diharapkan apa yang disajikan dapat dikembangkan lebih lanjut di lingkungan ITB.Abstract. Multiscale research is a subject that exploits various physical and chemical phenomena at different observation scales. In this research, the emphasis is that the observation scale influences our level of understanding regarding a physical or chemical phenomenon. A deeper understanding is usually acquired by making observations at smaller scales (micon- or nano-meter) that can be done towards man-made or natural materials/systems. Multiscale research is known to produce breakthrough inventions in science and technology. Some real examples include the non wetting coating that is developed by engineering a surface that allows for the liquid contact angle to be less than 900 (non wetting), the thermal barrier coating which can withstand exposures tovery high temperature environment, and the pollutant consuming cement containing titanium oxide which allows for decomposition of pollutants in air. These examples can inspire the development of multiscale research for infrastructure technology. This paper highlights the results of multiscale research, especially those that is relevant to the development of infrastructure technology. It is desired that what is presented can be developed further at ITB.
Studi Eksperimental Perilaku Siklis Flat Sab Beton Mutu Sangat Tinggi Kurniawan, Ruddy; Budiono, Bambang; Surono, Awal; Pane, Ivindra
Jurnal Teknik Sipil Vol 21, No 2 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1024.573 KB)

Abstract

Abstrak. Makalah ini menampilkan hasil penelitian eksperimental terhadap 3 buah benda uji struktur flat slab beton mutu sangat tinggi dengan campuran beton bubuk reaktif dibawah kombinasi beban gravitasi dan beban lateral siklis. Pengujian dilakukan dengan sistem sub assemblage hubungan pelat dan kolom dari struktur flat slab. Benda uji terdiri dari pelat dengan rasio tulangan tarik relatif rendah (0,65%) dan relatif tinggi (1,8%) yang diaplikasikan untuk bentang pelat 3,00 m sedangkan untuk pelat dengan bentang 2,00 m rasio tulangan yang dipakai hanya 1,8%. Beban gravitasi sebesar 8,45 kN/m2 diaplikasikan konstan, sedangkan beban lateral siklis diberikan dalam bentuk displacement control. Pembebanan siklis dilakukan melebihi ketentuan drift ACI 374.1-05 yaitu sampai dengan drift ± 5,00%. Pada drift 5%, perilaku non linear struktur menunjukkan respon histeresis yang daktail tanpa mengalami penurunan kekuatan yang signifikan baik untuk rasio tulangan tinggi maupun rendah. Meskipun demikian, penurunan kekakuan masih terjadi. Pengaruh rasio tulangan tarik lebih signifikan dibanding bentang pelat terhadap respon kekuatan dan kekakuan pelat terutama pada fase inelastis. Pelat bentang 3,0 m dengan rasio tulangan tarik rendah mempunyai rasio daktilitas perpindahan paling tinggi sedangkan pelat dengan bentang 3,0 m dengan rasio tulangan tarik tinggi mempunyai rasio daktilitas perpindahan paling rendah dibanding yang lain. Abstract. This paper presents the result of the experimental study on three very high strength concrete flat slab structures constructed with reactive powder concrete under combined gravity and cyclic lateral loads. The tests were conducted on slab-column connection sub assemblages of the flat slab structure. Two specimens had slab span of 3.00 m with relatively low and high tension steel reinforcement ratios of 0.65% and 1.8%, respectively. The other specimen had slab span of 2.00 m with tension steel reinforcoment ratio of 1.8%. The specimens were subjected to constant gravity load of 8.45 kN/m2 and the lateral cyclic load using displacement control close to 5% drift ratio. The drift was set up larger than as required in ACI 374.1-05. At 5% drift, nonlinear behavior of the structures showed ductile hysteresis responses without a significant decrease in strength both for lower and higher tension steel reinforcement ratio. However, a stiffness degradation still occurred for all specimens. Effect of tension steel reinforcement ratio was more significant than that of slab span on stiffness and strength responses particularly at inelastic ranges. Slab with span of 3.00 m and low tension steel reinforcement ratio showed the largest displacement ductility ratio while the slab with same span but higher tension steel reinforcement ratio resulted the lowest displacement ductility ratio compared to the other specimens.
Studi Eksperimental Perilaku Sambungan Balok-Kolom Eksterior Beton Bubuk Reaktif Terhadap Beban Lateral Siklis Naibaho, Pio Ranap Tua; Budiono, Bambang; Surono, Awal; Pane, Ivindra
Jurnal Teknik Sipil Vol 22, No 3 (2015)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.58 KB) | DOI: 10.5614/jts.2015.22.3.1

Abstract

Abstrak. Beton bubuk reaktif adalah jenis beton baru yang memiliki kuat tekan ultra tinggi. Komponen penyusunnya adalah powder sangat halus yang memiliki kandungan silika tinggi. Hal ini bertujuan untuk menyempurnakan reaksi yang terjadi pada beton dan meningkatkan homogenitas beton. Beton bubuk reaktif terdiri dari: semen, silica fume, pasir kuarsa dengan diameter maksimum 600 μm, superplasticizer dan serat polypropylene. Penelitian ini bertujuan mempelajari perilaku sambungan balok-kolom eksterior dengan meneruskan dan atau menambahkan tulangan pada sambungan balok-kolom eksterior menggunakan beton bubuk reaktif dengan pembebanan lateral siklis. Penelitian terdiri atas tiga buah benda uji dengan kuat tekan beton bubuk reaktif 135 MPa. Benda uji pertama (BU-1) berupa sambungan balok-kolom konvensional, benda uji kedua (BU-2) sambungan balok-kolom eksterior dengan meneruskan tulangan balok menembus kolom dan menambahkan pelat seukuran penampang balok pada sisi kolom dengan las, sedangkan benda uji ketiga (BU-3) sambungan balok-kolom eksterior dengan menambahkan tulangan pada tulangan pokok balok di sambungan balok-kolom eksterior. Hasil penelitian eksperimental dengan sistem pembebanan lateral siklis benda uji-3 lebih baik dibandingkan dengan benda uji-2 dan benda uji-1 untuk pola retak, kurva histeretik, hubungan antara beban dan lendutan, disipasi energi, degradasi kekuatan, dan degradasi kekakuan pada setiap siklus pembebanan. Abstract. Reactive Powder Concrete is a new type of concrete that posseses an ultra high compressive strength. The primary component of Reactive Powder Concrete is very fine powder with high silica content to improve the concrete’s chemical reaction and its homogeneity. Reactive Powder Concrete is a mixture of cement, silica fume, 600 μm diameter maximum of quartz, superplasticizer and polypropylene fiber. This research aims to evaluate the behavior of exterior beam-column connections with extended beam longitudinal bars and/ or added reinforcement using reactive powder concrete under lateral cyclic loading. This study consisted of three specimens with reactive powder concrete compressive strength of 135 MPa. The first specimen (BU-1) was detailed as a conventional beam-column connection, the second specimen (BU-2) was detailed by extending beam longitudinal reinforcement bars which are welded to a steel plate as large as beam’s cross section to the far side of column, while the third test specimen (BU-3) was detailed by adding reinforcement to the main reinforcement of the beam in the exterior beam-column connections. The results showed that specimen BU-3 possesed better cyclic behavior compared to the other two specimens in terms of crack pattern, hysteretic curve, energy dissipation, strength and stiffness degradation at each loadingcycle.
Program Eksperimental Perilaku Siklik Pilar Persegi Berongga Jembatan dengan Beton Berkekuatan Ultra Tinggi Rahman, Mohammad Junaedy; Budiono, Bambang; Surono, Awal; Pane, Ivindra
Jurnal Teknik Sipil Vol 22, No 2 (2015)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (931.967 KB) | DOI: 10.5614/jts.2015.22.2.4

Abstract

Abstrak. Makalah ini membahas perilaku histeretik pilar beton bertulang berpenampang bujursangkar berongga (Hollow Rectangular Section Pier, HRSP) dengan mengaplikasikan material beton berkekuatan ultra tinggi (Ultra High Strength Concrete, UHSC). Program eksperimental dilaksanakan pada dua model spesimen HRSP-UHSC yang dibebani kombinasi gaya aksial tekan yang konstan dan perpindahan lateral siklik quasi static melalui aktuator pada loading frame. Pembebanan lateral berbasis pada control perpindahan sesuai ACI-374.1-05 (2005). Gaya aksial tekan diaplikasikan pada HRSP-70 dan HRSP-60 dengan rasio masing-masing sebesar 0.075fc’Ag. dan 0.15fc’Ag. Hasil ekeperimental menunjukkan bahwa peningkatan rasio gaya aksial tekan berpengaruh signifikan terhadap peningkatan kekuatan geser pilar, namun selanjutnya pilar mengalami degradasi kekuatan lebih cepat dengan pencapaian drift ratio dan faktor daktilitas perpindahan yang menurun. HRSP-70 mampu mencapai drift ratio 5.80% dengan faktor daktilitas perpindahan 5.35, sedangkan faktor daktilitas perpindahan HRSP-60 menurun menjadi 4.58 pada drift ratio 3.50%. Kecenderungan ini mengakibatkan HRSP-70 mampu mengakomodir  degradasi kekakuan dari keadaan leleh pertama sampai pada kondisi batas hingga 82.99%, sedangkan pada HRSP-60 hanya sekitar 77.86%. Begitu pula pendisipasian energi pada HRSP-60 menurun 39.46% setelah gaya aksial tekan dinaikkan sebesar 50%.Abstract. This paper discusses the hysteretic behavior of Hollow Rectangular Section Piers (HRSP) by applying Ultra High Strength Concrete (UHSC) material. The experimental program conducted in two models of HRSP-UHSC specimens were loaded by combination of a constant axial compression force and quasi static lateral cyclic loads through actuators on the loading frame. The lateral loads were based on displacement controls in ACI 374.1-05 (2005). The constant axial compression forces were applied into the HRSP-70 and HRSP-60 of 0.075fc’Ag and 0.15fc’Ag, respectively. The experimental results indicate that the increasing of the axial compression force ratio enhances the shear strength significantly, but then it experiences higher strength degradations with lower attainment of drift ratio and displacement ductility factor. The HRSP-70 achieved a displacement ductility factor of 5.35 at drift ratio of 5.80%, while HRSP-60 achieved a displacement ductility factor of 4.58 at drift ratio of 3.50%. This trend resulted that HRSP-70 was able to accommodate the stiffness degradation of the first yield state to the ultimate conditions up to 82.99%, while the HRSP-60 was only about 77.86%. Similarly, the energy dissipation of HRSP-60 decreased by 39.46% after the constant axial compression force had been increased 50% from previous specimen.
The Behavior of Slab-Column Joints of Reactive Powder Concrete under Cyclic Load Budiono, Bambang; Surono, Awal; Pane, Ivindra; Kurniawan, Ruddy
Journal of Engineering and Technological Sciences Vol 48, No 4 (2016)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1262.994 KB) | DOI: 10.5614/j.eng.technol.sci.2016.48.4.4

Abstract

Experimental work on four specimens of reinforced concrete slab- column connection sub-assemblages using reactive powder concrete (RPC) was conducted. The specimens were subjected to a combination of gravity and cyclic loading. The gravity loading was represented by a number of concrete cubes hung on the slab bottom surface and the cyclic lateral loading was applied on the upper end of the columns. The specimens consisted of two variables, i.e tensile flexural reinforcement ratio (0.65% and 1.8%) and slab span (2.0 m and 3.0 m). Shear reinforcement was not used in the slab. The displacement history consisted of three repeated cycles, starting from 0.07 to 5.00 percent drift ratio, covering the elastic and the inelastic response of the specimens. The RPC mixture proportion for the specimen’s material was developed using local materials and normal concrete technology methods. The average RPC compression tests results were 136.0 MPa at 28 days and 141.0 MPa at the time of the first specimen, tested at 56 days. The tests results showed that up to 5.0 percent drift all specimens had stable hysteresis loops without any significant degradation of strength and stiffness. The specimen with a larger tensile flexural reinforcement ratio developed more strength, stiffness and energy dissipation.
EFEKTIVITAS SUPERPLASTICIZER TERHADAP WORKABILITAS DAN KUAT TEKAN BETON GEOPOLIMER Herwani Herwani; Iswandi Imran; Bambang Budiono; Ivindra Pane; Ediansjah Zulkifli; Elvira Elvira
Portal: Jurnal Teknik Sipil Vol 10, No 2 (2018)
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v10i2.975

Abstract

Beton Geopolimer merupakan beton yang tersusun dari campuran agregat kasar dan halus tanpa pengikat semen Portland (OPC). Sebagai penggantinya, digunakan pengikat dari bahan yang banyak mengandung silica dan alumina seperti fly ash. Analog dengan beton yang berbasis semen Portland, beton geopolimer juga menjadi kurang sempurna jika campuran beton segar mempunyai konsistensi yang tinggi dan bersifat kental (kaku) sehingga sulit untuk dikerjakan (workabilitas rendah). Penambahan Superplastisizer manjadi salah satu cara untuk meningkatkan workabilitasnya. Dalam makalah ini digunakan superplastisizer yang berbasis naphthalene dengan dosis 0%, 1.5%, dan 2 %. Molaritas larutan NaOH yang digunakan sebagai aktivator alkalin adalah 8 M, 10 M, 12 M, dan 14 M dengan rasio Na2SiO3/NaOH = 1.5. Dari hasil pengujian diketahui bahwa pengaruh superplastisizer yang berbasis naphthalene cukup efektif untuk memperbaiki workabilitas beton geopolymer. Beton segar menjadi lebih encer dan mudah dilakukan pemadatan saat di tuang ke dalam cetakan. Superplastisizer juga mampu meningkatkan kekuatan beton geopolymer namun besaran hanya mencapai 5.42%. Dosis Superplastisizer akan optimum pada persentase 1.5% terhadap berat fly ash dengan kuat tekan mencapai 31.63 MPa dan nilai slump antara 8-10 cm. Molaritas larutan NaOH yang baik untuk rasio Na2SiO3/NaOH = 1.5 adalah 8 M.
Confinement of Reinforced-Concrete Columns with NonCode Compliant Confining Reinforcement plus Supplemental Pen-Binder Anang Kristianto; Iswandi Imran; Made Suarjana; Ivindra Pane
Journal of Engineering and Technological Sciences Vol. 44 No. 3 (2012)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2012.44.3.2

Abstract

Abstract.  One  of  the  important  requirements  for  earthquake  resistant  building related  to  confinement  is  the  use  of  seismic  hooks  in  the  hoop  or  confining reinforcement  of  reinforced-concrete  column  elements. However, installation of a  confining  reinforcement  with  a  135-degree  hook  is  not  easy.  Therefore,  in practice, many construction workers apply a confining reinforcement with a  90-degree  hook  (non-code  compliant).  Based  on  research  and  records  of  recent earthquakes  in  Indonesia,  the  use  of  a  non-code  compliant  confining reinforcement  for  concrete  columns  produces  structures  with  poor  seismic performance.  This paper  presents a study  that  introduces  an additional element that is expected to improve the effectiveness of concrete columns confined with a non-code compliant  confining reinforcement. The additional element, named a pen-binder,  is   used to keep the  non-code compliant  confining reinforcement in place. The effectiveness of this element  under pure axial concentric loading  was investigatedcomprehensively.The  specimens  tested  in  this  study  were  18 concrete columns,with a cross-section of 170 mm x 170 mm and a height of 480 mm. The main test variables were the material type of the  pen-binder, the angle of  the  hook,  and  the  confining  reinforcement  configuration.The  test  results indicate  that  adding  pen -binders  can  effectively  improve  the  strength  and ductility of the column specimens confined with a non-code compliant  confining reinforcement. 
On the Development of a Nomogram for Alkali Activated Fly Ash Material (AAFAM) Mixtures Partogi H. Simatupang; Iswandi Imran; Ivindra Pane; Bambang Sunendar
Journal of Engineering and Technological Sciences Vol. 47 No. 3 (2015)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2015.47.3.1

Abstract

Alkali activated fly ash material (AAFAM) has become the most promising material to substitute materials based on ordinary Portland cement (OPC). However, there is no available nomogram for AAFAM mixtures. In contrast, there are many rational methods available in the literature to make paste, mortar and concrete with OPC based materials, such as Monteiro-Helene's nomogram, which uses Abram's law, Lyse's law and Molinari's law. This paper presents a study to construct such a nomogram for AAFAM mixtures by first conducting experiments on the  paste and mortar phases. The procedure of Monteiro-Helene's nomogram was adopted in this formulation. The first step in this direction was to find a close relationship between the strength and paste composition of the material that can be used as a substitute for Abram's law. The second step  was  to construct the equivalent  of  Lyse's and Molinari's relationships by varying the sand and fly ash contents. The results show that it is possible to make a nomogram for AAFAM mixtures such as the one for OPC based materials. Class F fly ash and its mortar phase were used to construct the nomogram. In addition, the  mortar  samples  that were  used to build the nomogram had similar solidification products according to their microscopic characteristics.
Co-Authors Abdul Haris Abdul Harris Adde Currie Siregar Anang Kristianto Awal Surono Awal Surono Awal Surono Awal Surono Awal Surono, Awal Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Budiono Bambang Sunendar P Budiono, Bambang Budiono, Bambang Budiono, Bambang Ediansjah Zulkifli Eka Wahyuni Elvira Elvira Fitriyati Agustina Fitriyati Agustina Herwani . Iswandi Imran Made Suarjana Mohammad Junaedy Rahman Muhammad Noor Asnan Partogi H. Simatupang, Partogi H. Pio Ranap Tua Naibaho Pratiwi, Dheka Shara Rahman, Mohammad Junaedy Ruddy Kurniawan Rusandi Noor Santi Yatnikasari Surono, Awal Surono, Awal Surono, Awal Ulwiyah Wahdah Mufassirin Liana Ulwiyah Wahdah Mufassirin Liana