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Pemakaian Fine Coarse Aggregate Sebagai Bahan Paving Tahan Aus (Fine Coarse Aggregate Usage As Raw Materials Of Abrasion Resistant Paving) Erwin Rommel Rommel
Media Teknik Sipil Vol. 9 No. 1 (2011): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v9i1.1113

Paving blocks are widely used in pavement construction such as container terminals, highways, parking lots, other open areas. Ease of installation, low maintenance and meet of the aestethics aspect cause more paving blocks of preferred. The FCA (fine coarse aggregate) paving blocks has the advantage in a mixture of 1:4:3, which is made by full-pressing method at 100 kg/cm2 with a strength reaches 406 kg/cm2 (grade-1); impact resistance is the best on the mixture of paving the heering-bone pattern. This further research will look at the quality aspects of paving from the abrasion resistance and the absorption rate of FCA paving blocks to provide paving mixture variables in (1; 4; 0, 1; 4; 3, 1; 4; 5) and the amount of pressing (60; 80 and 100 kg/cm2). The research results obtained minimum the abrasion resistance obtained at the paving 1; 4; 3 is given pressing 100 kg/cm2, abrasion value of 0.046 mm / min on a top layer of paving using admixture 1; 2 and 0.089 mm / min on without a top layer of paving blocks. The best absorption levels obtained at the paving with the same composition but at 60 kg/cm2 pressing provision.Key-word : pressing, strength, abrasion resistance

PERENCANAAN ULANG BALOK BETON BERTULANG PADA GEDUNG RUSUNAWA UMM DENGAN METODE STRUT AND TIE Dona Dwi Fitrianti; Zamzami Septiropa; Erwin Rommel
Media Teknik Sipil Vol. 9 No. 2 (2011): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v9i2.1198

Deep beam is the reinforced concrete structure, which has loads like normal beam, but has acomparatively high rate / width of a large, with clean span of Ln equal to or less than four times theoverall member height (h) or twice effectively depth beam (2d ) from the face of support withconcentrated loading. Strut and Tie Model (STM) is a method used to find the balance between loadand reaction forces in the concrete and steel.Redesign on Rusunawa beams using deep beam structure that consists of, beam 0.9 mx0,3mwith length 6.8 m that loaded of concentrated loading and deep beam 1.3 mx0, 4m by 4.2 meterslong that uniformly distributed loading. quality of concrete is used 25 Mpa and the quality of Steel350 MpaFrom the results of planning by using Strut and Tie Model (STM), obtained main flexurereinforcement of 6.8 meters is 4D19 for tensile bar and 5D19 for assembling bar. and Ø8- 160mmfor horizontal and vertical stirrups. As for the deep beam spans 4.2 meters, obtained flexurereinforcement is 5D20 for tensile and assembling bar and Ø8 - 220.2 mm for horizontal and verticalstirrups.Keywords: Deep beam, Strut and Tie method

PENGARUH PEMBERIAN PERAWATAN STEAM CURING TERHADAP KEKUATAN DAN DURABILITAS BETON DENGAN SEMEN POZZOLAN (EFFECT OF STEAM CURING ON STRENGTH AND DURABILITY CONCRETE WITH CEMENT POZZOLAN) Erwin Rommel
Media Teknik Sipil Vol. 9 No. 2 (2011): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v9i2.1200

The use of concrete as a building material has been developed both in quantity and qualityaspects. Concrete production time is long term in a foundry to make many breakthroughs to makea concrete material that fast food, such as precast concrete. The use of precast concrete in the areaof an aggressive environment than expected strength factors are also needed high durability,including resistance to porosity and permeability properties of concrete.This research was conducted with the cooperation of one of Precast Concrete Factory in EastJava, including the manufacture of 15x15x15 cm cube of concrete and steam curing system.Thisvariable on research ; use the type of cement (pozzolan cement and cement type-1), the length ofsteam (5 and 7 hours), and the quality concrete (K350 and K700). As for the testing performed oncompressive strength, permeability and porosity of concrete.This study concluded that steam curing system to provide early strength concrete that isbetter than conventional curing (non-steam), where compressive strength of the post-steam canreach 51% of high-strength concrete (K700) with the results 361 kg/cm2, whereas in normalconcrete (K350) reached 52% (compressive strength 192 kg/cm2). Pozzolan cement concrete alsohas the advantage in increasing the durability of concrete, especially in high-strength concrete,where the concrete porosity becomes smaller either by steam curing and non-steam. Permeabilityof concrete is given a steam becomes smaller than the normal concrete with conventional curing(non-steam).Key word : steam curing, pozzolan cement, strength of concrete

PEMAKAIAN FLY-ASH SEBAGAI CEMENTITIOUS PADA BETON MUTU TINGGI DENGAN STEAM CURING (THE USE OF FLY-ASH AS CEMENTITIOUS ON HIGH-STRENGTH CONCRETE WITH STEAM CURING) Erwin Rommel; Yunan Rusdianto
Media Teknik Sipil Vol. 10 No. 2 (2012): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v10i2.1787

Erwin Rommel1 & Yunan Rusdianto2Jurusan Teknik Sipil Fakultas Teknik Universitas Muhammadiyah MalangAlamat Korespondensi :Jalan Raya Tlogomas 246 Malang 65144email : erwin67pro@yahoo.com HP 08123314432ABSTRACTThe use of fly-ash as cementitious will be made to utilize physical and chemical properties offly-ash that has a dominan of silica and good of modulus fines. The use of steam curing will be donein this study which can speed up the cycle of making concrete. This is advantageous in the productionof precast concrete and velocity field construction.The research was conducted by making concrete cube 15x15x15 cm for 80 pieces and thentested the compressive strength and absorption of concrete. Achieve the quality of concrete madewith the provision of K600 with giving the fly-ash respectively 7.5%, 15% and 30% by weight ofcement.The results of the research obtained by the use of fly-ash as much as 7.5% as a cementitiousthat was given to the steam curing will provide the initial strength of concrete reached 47% ofcompressive strength at 28 days. While the effect of giving fly-ash in concrete has not seen absorptionsignificantly when compared to concrete without fly-ash.Key word : concrete, fly-ash, steam curing

PENGARUH PENGGUNAAN SERAT HIGH DENSITY POLYETHYLENE (HDPE) PADA CAMPURAN BETON TERHADAP KUAT TARIK BETON Erwin Rommel; Yunan Rusdianto; Anita Kurniati
Media Teknik Sipil Vol. 12 No. 1 (2014): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v12i1.2038

PENGARUH PENGGUNAAN SERAT HIGH DENSITYPOLYETHYLENE (HDPE) PADA CAMPURAN BETON TERHADAPKUAT TARIK BETON1)Erwin Rommel, 2)Yunan Rusdianto, 3)Anita Kurniati1,2,3)Jurusan Teknik Sipil Fakultas Teknik Universitas Muhammadiyah Malang3)Alumni Teknik Sipil FT-UMMemail : erwin67pro@yahoo.comABSTRACTResearch on the addition of HDPE fibers in normal concrete is intended to determine therelationship between the percentage of variation of fiber addition of HDPE to the workability, tensilestrength and determine the pattern of deployment of fiber in concrete. The addition of HDPE fibersis intended to increase the tensile strength of concrete.The concrete was mixed using gresik cement type PPC, sand with the gradation limits zone 2,the gravel with a maximum grain size of 20 mm, and HDPE fibers with a width of 0.5 cm and 2.5cm long. Variations in the addition of HDPE fibers are 0%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%,9%, 10% of the volume of the mixture. Tensile strength testing performed with a cylindrical testpiece with a diameter of 150 mm and 300 mm height at the age of 28 days of the test object. Tensilestrength of concrete data analysis using regression analysis.The results showed that the addition of HDPE fibers can increase the value of tensile strengthsides. There is a strong pull on the sides of the optimum levels of 4% with a tensile strength of 2.86MPa increased by 18%Key words: Concrete, HDPE fibers, Tensile strength

PERBAIKAN SIFAT FISIK DAN REAKTIFITAS FLY ASH SEBAGAI CEMENTITIOUS PADA BETON Erwin Rommel; Dini Kurniawati; Arman Putra Pradibta
Media Teknik Sipil Vol. 12 No. 2 (2014): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v12i2.2282

PERBAIKAN SIFAT FISIK DAN REAKTIFITAS FLY ASHSEBAGAI CEMENTITIOUS PADA BETON Improvement of The Physical Properties and Reactivity of Fly Ash As Cementitious On ConcreteErwin Rommel1, Dini Kurniawati2, Arman Putra Pradibta31,2,3Jurusan Teknik Sipil Fakultas Teknik – Universitas Muhammadiyah MalangAlamat korespondensi : Jalan Raya Tlogomas 246 Malang 65144email : erwin67pro@yahoo.comAbstractVariety of materials researchs is curently underway to develop environmentally friendly concrete is very varied in order to meet the demands of higher cement production. One way is to replace some of the cement with the rest of coal burning PLTU or commonly known as fly ash. Purpose of this study was to determine the effort to improve the physical and chemical properties of fly ash as a partial cement replacement material and influence the reactivity of fly ash has improved by incubating the silica synthesis. The physical examination, fly ash decreased in term of quality and fineness increase in the adsorption of the water content. The chemical test showed that a decline in the percentage of the elements Si and Al but an increase in elemental Fe. It also affects the content of the main compound SiO2 and Mullite are dominated by 77 – 80% fly ash decreased after a treatment process. Reactivity test using XRD found that fly ash has decreased the amount of 3,47% amorphous structure after experiencing the treatment. Fly ash that would be dominated by the reactive silica is a form of amorphous silica, is because the contact surface af amorphous silica is greater than crystalline. This reduction causes no more reactive fly ash after going through the process of treatment and no better used as a partial replacement for cement in concrete. Keyword : fly ash, environmentally friendly concrete, and synthesisAbstrakTeknologi bahan dan teknik untuk mengembangkan beton ramah lingkungan sangat bervariatif guna menjawab tuntutan produksi semen yang semakin tinggi. Salah satu caranya ialah mengganti sebagian semen dengan sisa pembakaran batubara dari PLTU atau yang biasa disebut fly ash. Tujuan dari penelitian ini adalah untuk mengetahui upaya memperbaiki sifat fisik dan kimia dari fly ash sebagai material pengganti sebagian semen serta pengaruh reaktifitas dari fly ash yang telah mengalami perbaikan dengan pensintesisan silika. Hasil pemeriksaan fisik, fly ash mengalami penurunan dalam segi kualitas kehalusan dan mengalami kenaikan dalam penyerapan kadar air setelah mengalami proses treatment.Hasil pemeriksaan kimia menunjukkan bahwa terjadi penurunan persentase pada unsur Si dan Al akan tetapi mengalami peningkatan pada unsur Fe. Hal tersebut juga berpengaruh terhadap kandungan senyawa utama SiO2 dan Al6Si2O13 (Mullite) yang mendominasi fly ash sebesar 77 – 80 % mengalami penurunan setelah mengalami proses treatment. Hasil uji reaktifitas dengan menggunakan XRD didapatkan bahwa fly ash mengalami penurunan jumlah struktur amorf sebesar 3,47 % setelah mengalami proses treatment. Penurunan ini menyebabkan fly ash tidak lebih reaktif setelah melalui proses treatment dan tidak lebih baik digunakan sebagai bahan pengganti sebagian semen dalam beton secara keseluruhan.Kata Kunci : fly-ash, beton ramah lingkungan, sintesis

PENGARUH PEMBERIAN JUMLAH DAN RASIO (L/d) SERAT BENDRAT TERHADAP SIFAT MEKANIK BETON Ahmad Hafiz S.G; Erwin Rommel; Lukito Prasetyo
Media Teknik Sipil Vol. 13 No. 1 (2015): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v13i1.2538

PENGARUH PEMBERIAN JUMLAH DAN RASIO (L/d) SERAT BENDRAT TERHADAP SIFAT MEKANIK BETONThe Influence of Steel Fiber Amount And L/D ratio to Mechanical Properties of ConcreteAhmad Hafiz S.G1, Erwin Rommel2, Lukito Prasetyo31 Staf Badan Perencana dan Pengembangan Kampus UMM2,3 Jurusan Teknik Sipil Universitas Muhammadiyah MalangAlamat korespondensi : email: erwin67pro@yahoo.com, ahafizsg16@gmail.com, prasetyo.lukito@gmail.comAbstractFiber concrete is the concrete which is mixed with fiber. The fiber was mixed into the concrete with the addition of fiber percentage. In this research, the fiber used was bendrat fiber. It had a diameter 0.8 mm which was cut be 1 cm, 2 cm, and 3 cm. Thus, the ratio (l/d) of fiber bendrat got 12,5 ; 25; and 37,5. Moreover, the amount of additional fiber used was 1 %, 2 % and 3 % from the amount of each cement ratio.In this research made 60 test concrete cylinder (150x300) mm in each of the 30 cylinder for testing compressive and 30 cylinders for testing tensile of the concrete. As for testing shear strength made 30 concrete specimen the shaped doubel-L (200x300x75) mm.The research results obtained that the wearing of a fiber ratio L/d = 12.5 will be able to enhance the tensile strength and shear stregth of concrete where fiber consumption bendrat as much as 3% obtained the greatest tensile strength 2,41 MPa or increased twice from the concrete without fibres, while for maximum shear strength reach 4,94 MPa with an increase of 54% compared to concrete without fibresKeywords: fiber concrete, steel fiber, tensile strength, shear strengthAbstrakBeton serat adalah bahan beton yang dicampur dengan serat dengan persentase tertentu. Dalam penelitian ini,serat yang digunakan adalah serat bendrat. Serat bendrat berdiamtere 0,8 mm dipotong-potong dengan panjang 1 cm, 2 cm dan 3 cm sehingga menghasilkan rasio L/d masing-masing 12,5; 25; dan 37,5. Sedangkan banyaknya serat yang ditambahkan terhadap volume berat yang digunakan masing-masing ; 1%, 2% dan 3%. Dalam penelitian dibuat 60 silinder diameter 150 mm dengan tinggi 300 mm masing-masing 30 silinder untuk pengujian tekan dan 30 silinder untuk pengujian tarik belah beton. Sedangkan untuk pengujian geser beton dibuat 30 specimen beton berbentuk doubel-L berukuran (200x300x75) mm. Hasil penelitian diperoleh bahwa pemakaian serat dengan rasio L/d=12,5 akan dapat meningkatkan kuat tarik dan kuat geser beton dimana pemakaian serat bendrat sebanyak 3% diperoleh kuat tarik terbesar 2,41 MPa atau meningkat 2 kali dari beton tanpa serat, sedangkan untuk kuat geser maksimal mencapai 4,94 MPa dengan kenaikan 54% dibandingkan dengan beton tanpa serat.Kata kunci : beton serat, serat bendrat, kuat tarik, kuat geser.

TINJAUAN PERMEABILITAS DAN ABSORBSI BETON DENGAN MENGGUNAKAN BAHAN FLY ASHSEBAGAI CEMENTITIOUS Erwin Rommel; Yusuf Wahyudi; Rozy Dharmawan
Media Teknik Sipil Vol. 13 No. 2 (2015): Agustus
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v13i2.2559

TINJAUAN PERMEABILITAS DAN ABSORBSI BETON DENGAN MENGGUNAKAN BAHAN FLY ASHSEBAGAI CEMENTITIOUSReview The Use of Fly-ash as a Cementitious to Concrete Absorbtion and PermeabilityErwin Rommel1, Yusuf Wahyudi2, Rozy Dharmawan31,2Jurusan Teknik Sipil Universitas Muhammadiyah Malang Jl. Raya Tlogomas 246 Malang 65144 Telp. (0341) 464318-319 Pes. 130 Fax. (0341)4604353Alumni Jurusan Teknik Sipil Universitas Muhammadiyah MalangEmail: erwin67pro@yahoo.comAbstractFly-ash material improvement efforts through the process of synthesis of silicawith the activator NaOH 5M solution has been done to improve the properties of reactivity. Repair of concrete permeability resistance trying to do with fly-ash as cementitious 10%, 20%, 30%, 40%. Concrete permeabilitytesting done by making 30 specimen (20x20x12) cm. Beside that alsocarried out testing on the absorption testing by making cylinder concrete (15x30) cm as much as 30 specimen. The comparison is done as the creation of concrete using fly-ash in a conventional fly-ash on concrete. The result of absorption obtained that the use of fly ash tend to be able to reduce the absorption on the concrete, both the conventionalfly-ash or fly-ash treatment. Even the usage of fly-ash above20% is not contrastive in the absorption of concrete given the fly-ash treatment or conventional fly-ash. The capability of concrete permeability looksbetter onconcrete using fly-ash treatment comparedto conventional fly-ash.Keywords : fly ash , permeability , absorptionAbstrakUpaya perbaikan material fly-ash melalui proses sintesis silika dengan aktivator NaOH 5M telah dilakukan guna memperbaiki sifat reaktifitasnya. Perbaikan ketahanan permeabilitas beton coba dilakukan dengan mengganti 10%, 20%, 30%, 40% berat semen dengan bahan fly-ash hasil rekayasa. Pengujian permeabilitas beton dilakukan dengan membuat 30 benda uji berukuran (20x20x12) cm. Disamping itu dilakukan juga pengujian pada ketahanan absorbsi beton dengan membuat benda uji silinder diameter 15 cm tinggi 30 cm sebanyak 30 benda uji. Sebagai pembanding dilakukan pembuatan beton dengan menggunakan bahan fly-ash konvensional (tanpa perbaikan) pada campuran beton. Hasil pengujian absorbsi diperoleh bahwa penggunaan fly ashcenderung dapat mengurangi nilai absorbsi pada beton, baik pemakaian fly-ash konvensional maupun fly-ash yang telah melalui hasil rekayasa. Bahkan pemakaian fly-ash diatas 20% tidak memperlihatkan perbedaan nilai absorbsi pada beton yang diberi fly-ash hasil rekayasa maupun fly-ash konvensional. Untuk kemampuan permebilitas terlihat lebih baik pada beton yang memakai fly-ash rekayasa dibandingkan dengan fly-ash konvensional.Kata Kunci : fly ash, permeabilitas, absorbsi

Kuat Lentur Dinding Panel Beton Busa dengan Perkuatan Wiremesh Erwin Rommel; Yunan Rusdianto; Rofikatul Karimah; Lukito Prasetyo; Anel Prasyas
Media Teknik Sipil Vol. 18 No. 1 (2020): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v18i1.11099

PPermasalahan energi dan lingkungan menjadi issue utama yang terjadi di negara-negara maju dan negara yang sedang berkembang tidak terkecuali di Indonesia. Kondisi geografis negara Indonesia yang terletak pada iklim tropis dan sebagian besar dilewati wilayah gempa, maka diperlukan desain bangunan yang dirancang selain tahan gempa juga harus memiliki konsep bangunan hemat energi. Bangunan tahan gempa dan hemat energi adalah impian bangunan dimasa mendatang, dimana dibutuhkan bangunan yang ringan, sifat insulasi yang baik, tata ruang optimal, serta bangunan yang memanfaatkan energi pada lingkungan sekitar. Dinding panel beton busa menjadi salah satu alternatif selain bobotnya ringan, pemasangannya cepat dan dapat diproduksi massal dipabrik. Tujuan penelitian ini adalah untuk mengetahui sifat mekanik dari dinding panel beton busa dengan memakai perkuatan wire mesh. Dinding panel berukuran 900 mm x 300 mm x 80 mm mm dibuat dengan campuran semen dan pasir 1:2,75 faktor air semen 0,425 dan 2% foam agent sebanyak 15 unit. Setiap 3 benda uji dibuat dengan dinding panel tanpa perkuatan (PD), dinding panel diberi styrofoam pada bagian tengah (PDS), dinding panel dengan serat ijuk (PDF), dinding panel dengan wiremesh 4 mm (PDM) dan dinding panel dengan wiremesh 4 mm dan styrofoam (PDMS). Pengujian lentur dilakukan dengan metode four-point-bending dengan mengamati beban retak, beban ultimit, displacemen dan pola retak yang terjadi. Hasil pengujian diperoleh bahwa kuat lentur dinding panel yang memakai wiremesh meningkat hingga enam kalinya dan kekakuan lenturnya meningkat dua kali dibandingkan dengan panel dinding tanpa wiremesh. Pola retak yang terjadi pada dinding panel dengan wiremesh menghasilkan penyebaran retak yang lebih merata dengan keruntuhan lentur bersifat daktail, sedangkan dinding panel tanpa perkuatan menunjukkan keruntuhan lentur bersifat getas.

TEKNOLOGI PEMBUATAN PAVING BLOCK DENGAN MATERIAL FCA (FINE COARSE AGGREGATE) Erwin Rommel
Jurnal Gamma Vol. 4 No. 2 (2009): Maret
Publisher : Jurnal Gamma

Show Abstract | Download Original | Original Source | Check in Google Scholar

Paving block most use in construction such as pavement, highway and parking area. Ease onsetting, cheap of treatment and aesthetic fully cause of paving block such as like. Production ofpaving block is not optimally from quality, because paving block still from the home industryproduct. The research is given production paving block with FCA (fine coarse aggregate) materialalternative another sand and cement. The strength paving block testing at some paving productwith full-pressing method, partial-pressing method and vibrating method.The research was done in UMM Laboratory and Home Industry. The six series paving blockconsist of cement : sand : FCA are 1:4:0, 1:4:3, 1:4:5, 1:8:0, 1:8:3, 1:8:5 respectively. Each variantwas made with pressing method (40, 60, 80 and 100 kg/cm2 respectively) and vibrating method,such as fully and partially method with totally specimen are 540 (each series was made 3 specimen).Curing method is done with spray water surface on paving block of age ; 7, 14, and 21 days,respectively.FCA paving block with full-pressing method can reach paving quality grade II, strength 276kg/cm2 at ratio 1:4:3, for partial-pressing maximum strength happened at ratio 1:4:0 (paving nonFCA) with strength 283 kg/cm2. The pressing method is better to compare with vibrating method,compression strength more than 200 kg/cm2, for partial-vibrating method (maximum strength is199 kg/cm2 at ratio 1:4:5, 21 day) strength result is better to compare with full-vibrating (strengthis 163 kg/cm2 at ratio 1:8:0, 21 day)

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