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Gunawan Wibisono
Universitas Riau
Agriculture, Biological Sciences & Forestry Arts Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Kuat Tekan Dan Porositas Beton Campuran Crumb Rubber Dan Abu Sekam Untuk Material Perkerasan Kaku Di Tanah Gambut Mia Qoryati; Monita Olivia; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study aims to study the compressive strength and porosity of PCC concrete and PCC-CR-RHA concrete. PCC concrete as a control and PCC-CR-RHA concrete that contains 5% of crumb rubber and 10% of rice husk ash. These concretes exposed to peat water with flexural strength according to Bina Marga 2018 standard regarding rigid pavement of 4.5 MPa and 35 MPa compressive strength. The tests were carried out after speciments were cured on peat water for 0, 7, and 28 days. The test results showed that the compressive strength of PCC concrete was 32.065 MPa, higher than the compressive strength of PCC-CR-RHA at 28 days. While the porosity of PCC concrete was 7.204%, lower than the porosity of PCC-CR-RHA at 28 days. The test results of PCC concrete compressive strength at the age of 28 days for peat water curing increased by 10.01% as well as PCC-CR-RHA concrete, which increased by 6.79%. PCC concrete porosity values at the age of 28 days for peat water curing decreased by 36.90% as well as PCC-CR-RHA concrete, which decreased by 43.15%. Based on the results of tests conducted, both types of concrete have good compressive strength and porosity when exposed to peat water.Keywords: Compressive strength, porosity, crumb rubber, rice husk ash, rigid pavement, peat soil.
Analisis Kinerja Simpang Empat Tak Bersinyal Pada Ruas Jalan Cempaka – Jalan Teratai Pekanbaru Aidi Yani Fitri; Sri Djuniati; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Crossroad is an intersection of two or more roads that joins or crosses each other and often run into traffic conflicts. The intersection of Cempaka Road – Teratai Road is one of a intersection without traffic signs. Traffic conflicts, such as traffic jams during the peak hour, have happened frequently in this intersection. This study’s objective is to calculate the performance of this intersection based on Indonesian Highway Capacity Manual (Manual Kapasitas Jalan Indonesia, MKJI) 1997. The study took three days to finish; Saturday (28/10/2017), Sunday (29/10/2017), until Monday (30/10/2017), with observation hours happening during morning (07.00-09.00 WIB), noon (11.00-14.00 WIB) and afternoon (16.00-19.00 WIB). Based on the conducted surveys and traffic calculation, traffic peak hours happen on Monday from 16.45 to 17.45 WIB with the value of Q = 2984,5 smp/hr, C = 3170 smp/hr, Ds = 0,94, DTI = 12,70 s/smp, DTMA = 9,08 s/smp, DTMI = 19,91 s/smp, DG = 4,02 s/smp, D = 16,72 s/smp, and QP = 36 - 70%.. Due to the calculated Ds having a value higher than the value stated by MKJI which is 0,75, a planning and regulation needs to be done for the intersection of Cempaka Road – Teratai Road. In order to make the value of Ds for this intersection lower than 0,75, a lane (B) prohibiton and a widening of the major lanes from 7,7 m and 7,6 m into 9,7 m and 9,6 m respectively were done and then the Ds value for Cempaka Road – Teratai Road intersection finally reaches the intended target with the value being 0,69.Keywords: Intersection without traffic sings, traffic flow, capasity, degree of saturation
Stabilisasi Tanah Gambut Menggunakan Geopolimer Hybrid Erwin Erwin; Gunawan Wibisono; Monita Olivia
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Peat soil has high moisture content and organic content. Peat soil is stabilized to improve soil properties and increase its strength. This study examines stabilization mixtures on peat soil with geopolymers hybrid. Geopolymers are alternative substitutes for cement, made from remnants of industrial waste which rich of silica and alumina, such as fly ash, husk ash, slag and palm ash. The geopolymer bond can be activated with an activator solution. Geopolymers were added by OPC to accelerate hardening and optimize strength on the ground. The purpose of this study is to compare the compressive strength of peat soil mixed with the soil geopolymer hybrid using an Unconfined Compressive Strength (UCS) Test. This study used a different variation of the treatment that are the age of 7 days and 28 days. Binder for the mixed set of 200 kg/m3 with geopolymer materials used by 50% of the binder and the OPC which was used by 50% and 100% of the binder. The results showed that the compressive strength with hybrid geopolymer mixture tends to increase from 7 days to 28 days and the compressive strength of geopolymer hybrid is higher than peat. Based on the results of this test it is concluded that peat soil using a mixture of hybrid geopolymer could increase the value of compressive strength.Keywords: peat soil, OPC, fly ash, geopolymer hybrid, UCS
Porositas Beton Geopolimer Hybrid Faba Dengan Variasi Modulus Silikat Pada Air Gambut Ayu Nofikasari; Monita Olivia; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 9 (2022): Edisi 1 Januari s/d Juni 2022
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study examines the value of porosity in hybrid geopolymer concrete immersed in peat water. FABA as the main ingredient for making concrete has a high silica content. The purpose of this study was to find out the modulus activator with the ratio of modulus silicate (Ms) as one of the factors affecting the porosity value of FABA hybrid geopolymer concrete immersed in peat water. This study has been done to determine the percentage of pores in the concrete by examined the characteristics of the geopolymer concrete material. The mix design of the specimens was determined by a silicate modulus ratio of 2, 2.5, and 3, 12M for the NaOH molarity, 0,65 for Na2SiO3/FABA ratio, and 0,26 for water/FABA ratio. The samples were made in the form of a cylinder concrete with diameter 105 mm and height 105 mm with a total of 24 samples. The samples were cured at room temperature for 28 days and then immersed in peat water for 28 days. The results showed that the lowest geopolymer concrete porosity was found in concrete with Ms 3, which was 11.92% and the highest was found in concrete with Ms 2, which was 14.24%.Keyword : Porosity, fly ash, geopolymer, modulus silicate, NaOH
Pengaruh Gradasi Pasir Dan Kadar Lempung Terhadap Kuat Geser Tanah Khairul Umam; Soewignjo Agus Nugroho; Gunawan Wibisono
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Clayey sand’s shear strength is influenced by several factors, for examples sand and clay soil fraction, soil properties, density, moisture content, and gradation. Sand and clay mixture with same composition may different in shear strength. It is influenced by moisture content, density and gradation. This research aims to study the effect of clay content in sand that change the Shear strength of soil. Variation of clayey sand soil distinguished based on percentage, every variation have different gradation from well-graded sand to poorly-graded sand. Each sample variation is mixed with a certain moisture content, preloading created in order to represent overburden pressure. Samples was tested of gradation, density and shear strength. Relationship between gradation and shear strength value expressed by the value of Cc, Cu and cohesion, internal friction angle shows specific graphs in particular trends. The results showed effect of gradation and density on soil shear strength. Soil with well-graded sand and dense has good shear strength, in the other hand shear strength decreased when the gradation and density became lower. The addition of clay will increase cohesion and decrease internal friction angle.Keywords : clay, density, gradation, shear strength, sand.
DURABILITAS BETON BERTULANG DI LINGKUNGAN TANAH GAMBUT DI KABUPATEN BENGKALIS Surgaroni uga; Monita Olivia; Gunawan Wibisono
JURNAL TEKNIK Vol. 15 No. 1 (2021): Edisi April 2021
Publisher : JURNAL TEKNIK UNILAK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/teknik.v15i2.5194

Abstract

Paparan air gambut yang bersifat asam dapat mempengaruhi durabilitas beton khususnya degradasi permukaan beton serta korosi baja tulangan pada beton bertulang yang berdampak pada masa layan beton bertulang itu sendiri. Penggunaan semen untuk konstruksi dalam beberapa tahun belakangan ini telah beralih dari tipe Ordinary Portland Cement (OPC) menjadi Portland Composite Cement (PCC). Hal ini berdasarkan kebijakan industri semen untuk mengkonversi sebagian kandungan semen OPC menggunakan material pozzolanik. Oleh karena itu semen tipe PCC lebih mudah diperoleh di pasaran dan telah banyak digunakan sektor konstruksi. Pada penelitian ini dikaji Durabilitas beton bertulang di lingkungan tanah gambut. Parameter penelitian adalah semen PCC dengan mutu beton f’c14,53 MPa (K-175);f’c20,75 MPa (K-250) dan f’c28 MPa (K-337,35) melalui proses curing menggunakan air normal dan umur beton yang direndam di lingkungan air gambut. Beton PCC dengan mutu beton f’c14,53 MPa (K-175);f’c20,75 MPa (K-250) dan f’c28 MPa (K-337,35) digunakan sebagai benda Uji, kemudian benda uji direndam di bak perendaman selama 28 hari dan diletakkan di daerah lingkungan gambut di Kelapa sari kabupaten Bengkalis hingga waktu pengujian. Pengujian yang dilakukan adalah kuat tekan, kuat tarik dan Kuat Lentur setelah benda uji direndam di Air gambut pada umur 0, 28, 91, dan 120 hari. Hasil pengujian menunjukkan bahwa umumnya kuat tekan, Kuat Tarik dan Kuat Lentur Meningkat direndam di di lingkungan gambut hingga umur 120 hari.
The Effects of Using Ground Cockle Seashells as an Additive for Mortar in Peat Environment Monita Olivia; Ismi Siska Rahmayani; Gunawan Wibisono; Edy Saputra
Journal of the Civil Engineering Forum Vol. 6 No. 3 (September 2020)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.55651

Abstract

Seashells are available abundantly in coastal areas and have the potential to be used as aggregates and replacement for cement in mortar and concrete. They are also applied as mineral additives for mortar or concrete to increase the resistance of these materials in an aggressive environment, especially in constructing structures such as drainage and sewer networks which require good resistance to organic acid attack. This paper discusses the potential addition of ground seashells to improve the performance of mortar used as a drainage lining in an acidic environment such as peatland. The mix was designed using a 4% ground cockle shell (Anadara granosa) by cement weight as an additive in two mixes which include Ordinary Portland Cement (OPC) and OPC Cockle Shell (OPCCS). The samples were cured in a water pond for 28 days before they were placed in water and peat water for 120 days after which the compressive strength, porosity, sorptivity, change in weight, and visual characteristics were investigated. The results showed the compressive strength of OPCCS mortar increased by 11.29% after immersion in peat water for 120 days with its porosity and sorptivity decreased by 5.78% and 31.07% due to the refinement of the pores and capillary network in the mortar. Moreover, the weight of the brushed and unbrushed OPCCS mortar in peat water was lesser compared to the OPC due to the increase in CaO content which has the ability to fill the pores and reduce disintegration. The visual examination showed an improvement in the pH of OPCCS mortar due to the ability of the ground cockle shells to neutralize the acidity of the peat water. This study, therefore, shows the use of ground cockle shells as an additive makes it possible to use mortar as a drainage lining because the shells provide excellent resistance to acidic peat environments.
The Influence of High Plasticity and Expansive Clay Stabilization with Limestone on Unconfined Compression Strength Soewignjo Agus Nugroho; Gunawan Wibisono; Andarsin Ongko; Avrilly Zesthree Mauliza
Journal of the Civil Engineering Forum Vol. 7 No. 2 (May 2021)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.59438

Abstract

Clay is a cohesive material that becomes very soft when high content of water is added. This condition makes construction activities difficult on this type of soil. There is, therefore, a need for stabilization when dealing with high plasticity clay through several methods such as the application of limestone. However, this method mostly does not meet the standards due to the reaction between limestone and groundwater which normally alters soil properties, thereby, leading to a reduction in stickiness and softness of the soil. Meanwhile, limestone generally has the ability to compact and stabilize the soil due to its fine powder which consists of metals and non-organic mineral compositions. Therefore, this study was conducted to identify the influence of using limestone additives for stabilization at different mixture compositions on clay. The properties of the soil were tested before the Unconfined Compression Strength Test and the results showed limestone was effective in stabilizing high plasticity and expansive clay. This was proven by the 10% increase in the Unconfined Compression with lime content in curing conditions for 28 days as well as the 319% magnitude of the non-soaked, 6% reduction in the liquid limit value, and 46% increment in the plastic limit value.
BIO-PORTA TANK (BACTERIAL PORTABLE SEPTICTANK) SEBAGAI SOLUSI SANITASI PERUMAHANDENGANMUKA AIR TANAH TINGGI [BIO-PORTA TANK (BACTERIAL PORTABLE SEPTICTANK) AS A SANITATION SOLUTION OF HOUSING WITH HIGH GROUNDWATER LEVEL] Dhea Fitra Yofani; Shakila Fuadah Lubis; Milka Novita Manalu; Ramadhan Yanuari; Rezha Yaren; Gunawan Wibisono; Monita Olivia
Jurnal Sinergitas PKM & CSR Vol 4, No 3 (2020): DECEMBER
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jspc.v4i3.2425

Abstract

Kubang Jaya village is located in a low land peat swampy area and often suffers from the flood in the rainy season.  Swampy peat area generally has a high groundwater level; thus, it can immerse the septic tank in the housing in the area.  The height of the groundwater table is approximately 50cm from the surface level, while the depth of the septic tank is 150cm.  When the septic tank below groundwater level, this could cause a mix of soil water and septic tank waste.  This community development activity aims to educate the community about sanitation and give lecture and training of installing bio-porta septic tank (bacterial portable septic tank) for housing in high groundwater level area. Bio-porta septic tank consists of two drums as sediment tank and aeration tank. Bio balls were used to speed up the decomposition by aerobic bacteria in the tank.  An aerator was added to the installation to increase the proliferation of bacteria. The community development activities were pre-test, lecture, post-test, practical and cadre training.  Results show that there was an increase of understanding and knowledge of community from 24% to 62% about the septic tank in high groundwater level area.  The community also agreed to replace the conventional septic tank into the bio-porta septic tank in the future.  The activity also has a positive impact on educating and changing the mindset and attitude the community of Kubang Jaya village in improving the sanitation with an intention to the bio-porta septic tank in the future.BAHASA INDONESIA ABSTRACT: Desa Kubang Jaya merupakan kawasan dataran rendah rawa gambut dan sering mengalami banjir saat musim hujan. Lahan rawa gambut umumnya memiliki muka air tanah tinggi sehingga dapat merendam tangki septik pada perumahan yang terdapat di kawasan tesebut. Rata-rata tinggi muka air tanah sekitar ±50 cm, sedangkan kedalaman tangki septik warga sekitar ±150 cm dari permukaan tanah. Apabila tangki septik terendam, maka hal ini dapat mengakibatkan pencampuran air tanah dengan limbah tangki septik. Oleh karena itu dilakukan kegiatan pengabdian masyarakat dengan memberikan pengetahuan mengenai sanitasi lingkungan dan memberikan penyuluhan serta pelatihan pembuatan tangki septik bio-porta (bacterial portable septic tank) untuk rumah di lingkungan dengan muka air tanah tinggi. Tangki septik bio-porta terdiri dari dua drum yang berfungsi sebagai tangki pengendapan dan tangki aerasi. Untuk mempercepat proses penguraian oleh bakteri aerob di dalam tangki maka digunakan bio ball atau rumah bakteri. Aerator ditambahkan pada instalasi untuk mempercepat perkembangbiakan bakteri aerob. Kegiatan pengabdian terdiri dari pre-test, penyuluhan, post-test, praktek, dan pelatihan kader. Hasil evaluasi kegiatan pengabdian menunjukkan terjadinya peningkatan pengetahuan masyarakat dari 24% menjadi 62% tentang tangki septik di lahan dengan muka air tanah tinggi.  Masyarakat juga sangat setuju untuk mengganti tangki septik konvensional dengan tangki septik bio-porta di masa mendatang. Hasil kegiatan sangat berdampak positif untuk mengedukasi dan mengubah pola pikir serta sikap warga desa Kubang Jaya dalam memperbaiki sanitasi lingkungan tempat tinggal dengan keinginan untuk menggunakan tangki septik bio-porta di masa mendatang.
EDUKASI PELESTARIAN LAHAN GAMBUT UNTUK ANAK USIA SEKOLAH DASAR MENGGUNAKAN MEDIA BUKU KREATIF [EDUCATION PEATLAND CONSERVATION FOR ELEMENTARY SCHOOL USING CREATIVE BOOK MEDIA] Habib Abdurrahman; Abrar Rifqi Pratama; Ardian Yolanda; Arif Rahman; Zakiyul Fuadi; Gunawan Wibisono; Monita Olivia
Jurnal Sinergitas PKM & CSR Vol 6, No 1 (2022): APRIL
Publisher : Universitas Pelita Harapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19166/jspc.v6i1.5095

Abstract

Peatlands have an important role in ecosystems as a carbon storage and helps to reduce greenhouse gas emissions.Inappropriate peatland conversion causes common problems such as forest fires which create severe air pollution and trigger the production of greenhouse gases due to the release of stored carbon. As a result, early education regarding peat soil conservation is necessary to ensure that people understand the importance of peat soil and the harm that happens when peatlands are converted inappropriately. This program aims to educate students about peatlands and raise awareness about the importance of protecting and conserving peat from an early age. Educational materials are delivered using creative books containing illustrated stories, important knowledge about peat, and interactive games to attract student’s interest in reading and make information easier to recall. The results of the final evaluation through a questionnaire revealed that using creative books to educate students about peatlands was successful in improving students' understanding of peatlands. This is proven by the increasing number of students who fully understand the peat information that has been taught from 3 students to 32 out of 33 students.BAHASA INDONESIA ABSTRAK: Salah satu peran penting lahan gambut bagi ekosistem adalah sebagai pengikat karbon sehingga bermanfaat dalam mengurangi gas rumah kaca. Pengalihfungsian lahan gambut dengan cara yang tidak benar menyebabkan timbulnya masalah yang umum terjadi seperti kebakaran lahan gambut yang menyebabkan pencemaran udara melalui polusi kabut asap dan memicu terbentuknya gas rumah kaca akibat pelepasan karbon yang disimpannya. Untuk itu, pemberian edukasi mengenai pelestarian tanah gambut perlu diterapkan sejak dini agar masyarakat mengetahui peranan penting tanah gambut dan kerusakan yang terjadi apabila lahan gambut dialihfungsikan. Pengabdian ini bertujuan untuk memberikan edukasi pengenalan lahan gambut sekaligus meningkatkan kepedulian untuk menjaga dan melestarikan gambut sejak dini. Materi edukasi disampaikan menggunakan buku kreatif yang berisi cerita bergambar, pengetahuan penting tentang gambut, dan games interaktif agar menarik minat membaca dan membuat informasi menjadi lebih mudah diingat oleh siswa. Hasil evaluasi akhir melalui kuisoner menunjukkan bahwa pemberian edukasi tentang tanah gambut menggunakan media buku kreatif berhasil meningkatkan pemahaman siswa mengenai lahan gambut yang dibuktikan dengan bertambahnya jumlah siswa yang telah paham sepenuhnya mengenai materi gambut yang telah diajarkan dari semula 3 siswa menjadi 32 dari 33 siswa.
Co-Authors Abdurrahman, Habib Abrar Rifqi Pratama Afdal Afdal Agus Ika Putra Agus Nugroho, Soewignjo Ahmad Fajriman Aidi Yani Fitri Ainiyyah Fadhilah Alfian Kamaldi Alfian Malik Alfikri, Nur Ali Imron Rusadi Andarsin Ongko Ardian Yolanda Arief Rahman Arief Rijaldo Fajri Arif Rahman Avrilly Zesthree Mauliza Ayu Nofikasari Dhea Fitra Yofani Dinni Yunike Jasril Edy Saputra Eko Soebowo Erwin Erwin Fachrul Willian Fahri Hafisuddin Fahrurrozi Fandy Agisman Febri Paramitha Ramadhani Ferisma Ratu Giri Ferry Fatnanta Frans Rezal Habib Abdurrahman Hasibuan, Putra S Hengki Tornando Ihsanul Muslim Irvan Arisma Iskandar Romey Sitompul Ismeddyanto, Ismeddiyanto Ismi Siska Rahmayani Kairon Wika Rejeki Sembiring Kamaldi, Alfian Khairil Badry Khairul Umam Leo Sentosa M. Shoffar Al Hafizh Marpaung, Horas Saut Maringan Mia Qoryati Milka Novita Manalu Mohd. Rizki Novianto Monita Olivia Monita Olivia Muhamad Yusa Muhammad Alfaridzi Adfan Muhammad Ikhsan Muhammad Riyan Sabri Muhammad Rizky Muhammad Shalahuddin Muhammad Yusa Muhardi Niko Rizaldi Nur Alfikri Nurwijayanti Ori Patinsyah Qoryati, Mia Rahmi Afifi Rahmi Afifi Ramadhan Yanuari Rezha Yaren Ria Larici Rijaldo, Arief Rinaldi Rinaldi Rizqy Ridho Prakasa Rudy Satriya Pratama Satibi, Syawal Shakila Fuadah Lubis Soewignjo Agus Nugroho Sri Djuniati Suci Cahya Ferdilla Surgaroni uga Trivia Ariska Wicaksono Mahestra Noegroho Zakiyul Fuadi