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Monita Olivia
Universitas Riau
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering Physics Public Health Social Sciences Transportation Other

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Nilai Slump, Porositas Dan Kuat Tekan Beton OPC Dan OPC RHA Untuk Aplikasi Di Lingkungan Gambut Alfadh, Mhd Raja; Kamaldi, Alfian; Olivia, Monita
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

The aggressive environment, especially the peat environment contains many chemicals that can unravel the elements in the concrete, causing damage to the concrete. This study examines the strength and physical properties of OPC (Ordinary Portland Cement) concrete and OPC RHA (Rice Husk Ash) concrete exposed in peat environments. RHA as one of pozzolan with high silica is used as a replacement of cement with the substitution of 5% and 10%. This concrete are tested mechanically and physically such as compressive strength and porosity tests after soaking in peat canals for 28 days, in addition to fresh concrete tests such as workability. The concrete strength of the planned concrete is K-250. The peat water used as a test immersion medium has a pH of 3.5-4.5. The results of fresh concrete testing show that the addition of RHA makes the workability decreases. The lowest workability was obtained from a mix containing 10% RHA. The OPC concrete has the highest compressive strength of 20,28 MPa. Porosity of OPC RHA concrete decreased with increase in curing time. The lowest porosity is shown by OPC RHA 10% concrete. Based on the results of the test, it is concluded that the replacement of cement by RHA, has a positive effect on all physical properties of concrete.Keywords: Peat Environtment, OPC, RHA, Compressive strength, Physical Properties
Porositas Dan Sorptivity Beton OPC Dan Beton OPC POFA Dengan Perbaikan Air Gambut Sebagai Air Pencampur Menggunakan Kapur Tohor Di Lingkungan Gambut Sormin, Lina S; Olivia, Monita; Syaputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The use of peat water is often used as concrete mixing water in areas difficult to obtain clean water. Peat water containing a low pH is not recommended as concrete mixing water because it can reduce the quality of concrete. Mineral materials such as Palm Oil Fuel Ash (POFA) used in the concrete mix to increase the density of the resulting. This study aims to assess the physical properties such as porosity and water sorptivity concrete using peat as concrete mixing water. Type of cement used in the concrete mixture is OPC and OPC POFA 10%. Peat water for the research came from Rimbo Panjang, Kampar, Riau and POFA derived from Perhentian Raja, Kampar, Riau. Research results show that concrete repair using quicklime 40 milligrams for peat water soaked peat environment has a high porosity and sorptivity.Keywords: OPC, Palm Oil Fuel Ash (POFA), peat water, quicklime
Kuat Tekan Paving Block Geopolimer Abu Sawit (Palm Oil Fuel Ash) Dengan Perawatan Suhu Ruang Syarif, Harriad Akbar; Olivia, Monita; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Geopolymer is an environmentally friendly alternative construction material made from the process of activating the base material rich in silicon (Si) and aluminum (Al) with a solutionof alkaline activators. In this study, using the ashes of oil derived from Dumai, Riau Province as the base material of geopolymer. With the eco-friendly construction material that theproduct is made with reference to a standard paving blocks. This study is based on variations of modulus activator, dosage activators, and the addition of cement type 1 (OrdinaryPortland Cement) for the treatment of room temperature (setting time) on the composition of the mixture. This study aims to determine the amount of use of the base material (palm oil fuelash) from the comparison alkaline activator with palm oil fuel ash used in paving block geopolymer based treatment time and its influence on the physical properties of the geopolymer paving block. The results showed that the strong increase in modulus of paving blocks are influenced by activators in combination with the addition of cement to each composition.Keywords: palm oil fuel ash, geopolymer, paving block, modulus activator, dosage activator
Kuat Tekan Dan Perubahan Berat Mortar Abu Sekam Padi (Rice Husk Ash) Di Lingkungan Air Gambut Ednor, Meirisa; Olivia, Monita; Sitompul, Iskandar Romey
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

Peat water potentially damage and attack calcium, reduce the strength and accelerate corrosion of mortar and caused significant degradation in the long term. This study aims to determine resistance acid to cement with using added materials were exposed to acidic water. Two types of hardened cementing materials, such as Ordinary Portland Cement (OPC) and Rice Husk Ash (RHA) will be soaked in regular water and peat water. Cement was replace with 15% of rice husk ash. The acid resistance of cements was test by compressive strength, sorptifity, and porosity. There was a considerable decrease in the compressive strength of mortar OPC after exposure to acid attacks from peat water. This research show mortar with rice husk ash was more resistant in peat water for 91 days.Keywords: Acid, Cement, Peat Water, Rice Husk Ash, Resistance.
Ketahanan Mortar Campuran Serbuk Karet Terhadap Suhu Tinggi Widya, Diah; Djauhari, Zulfikar; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The growing of automotive industry along with the increasing need for tire production cause to many waste tire. To solve this problem, many innovative solution have been proposed, namely the use of rubber tires as an added material in the manufacture of concrete mixture This is due to its flexible nature so as to increase the ductility of concrete. This research aims to study how compressive strength of mortar are resistant to high temperatures with materials added to waste tire used in powder form. Variations in the content of rubber powder used were 0%, 2.5%, and 5% of the weight of cement. Mortar was burned at temperatures of 250ºC, 500ºC, and 750 ° C for 3 hours. The results of the research and compressive strength with room temperature showed that OPC with the addition of 5% rubber powder had the highest compressive strength of 18.20 MPa. But when the mortar experienced a temperature higher than 250 ° C, the mortar strength decreased by 10%, with the addition of tire rubber powder as much as 5% with a compressive strength of 15.92 MPa, making the mortar had a better compressive strength than without the addition of powder rubber. Moreover the optimum temperature in mortar testing was at a temperature of 500 ° C with 5% rubber powder mixture. OPC mortars that were burned at 500 ° C and 750 ° C experience a hair cracking the mortar surface.Keywords:, Rubber powder, mortar, OPC, high temperature.
Kuat Tekan Beton Hvfa Di Air Gambut Sopian, Sopian; Ismeddiyanto, Ismeddiyanto; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

High Volume Fly Ash (HVFA) is a concrete with green building concept. The quantity of fly ash each year increases as coal production increases. HVFA Concrete offers a short-term solution of the growing need for portland cement. Concrete with the use of pozzolanic material has better strength in reducing the effect of organic acid from peat water than Ordinary Portland Cement (OPC). This research examines the compressive strength of OPC concrete and HVFA concrete exposed in peat water environment with a variation of fly ash as many as 50% of the weight of the cement volume. Concrete samples were made with a cylindrical mold with a height of 210 mm and a diameter of 105 mm. The number of samples made in this study was 18 pieces. The OPC and HVFA culinder concrete were cured for 28 days. Later, the specimens were put in a container and cure with peat water for 7 and 28 days. The results of fresh concrete test showed that the greater the amouny of fly ash used in concrete mix, the workability decreased. For the case of specimens immersed in peat water for 28 days, its concrete strength was 31,05% higher than that of immersed in fresh water. Based on the results of these tests it was concluded that HVFA concrete was able to reduce peat acid attack compared to OPC concrete.Keywords: HVFA, compressive strength, peat environment
GEOPOLIMER SEBAGAI MATERIAL INFRASTRUKTUR BERKELANJUTAN DI LINGKUNGAN GAMBUT Olivia, Monita
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Abstract

Rawa gambut merupakan lingkungan tanah organik dengan kadar air tinggi, daya dukungrendah dan derajat keasaman tinggi. Struktur beton di lingkungan asam rentan mengalamikerusakan jangka panjang akibat asam-asam organik dan non-organik seperti asam humat danasam sulfat dapat menyerang kalsium pada beton membentuk garam, meningkatkan porositas,menurunkan kekuatan beton, serta berpotensi mempercepat korosi tulangan pada beton.Ketahanan konstruksi di lingkungan asam, seperti tanah gambut, merupakan permasalahaninfrastruktur dengan dampak signifikan karena material yang digunakan sebaiknya ekonomisdan memiliki durabilitas tinggi. Geopolimer dihasilkan dari proses geopolimerisasi bahan kayasilikat dan alumina, seperti abu terbang dan abu sawit, menggunakan larutan aktivator. Hasilpenelitian terdahulu menunjukkan bahwa material geopolimer memiliki sifat fisik dan mekanikyang sebanding dengan material berbasis semen OPC (Ordinary Portland Cement), serta tahanterhadap lingkungan agresif seperti suhu tinggi, lingkungan asam dan air laut. Tulisan inimengkaji potensi geopolimer sebagai material untuk aplikasi infrastruktur di lingkungan asamrawa gambut. Material geopolimer memiliki ketahanan lebih tinggi terhadap lingkungan asamkarena memiliki ikatan aluminosilikat yang stabil dan tidak mudah bereaksi langsung dengansenyawa asam di lingkungan gambut.Kata kunci: abu sawit, abu terbang, aluminosilikat, asam, gambut, geopolimer, infrastruktur.1.
Pengaruh Persentase Semen Opc Terhadap Kuat Tekan Mortar Geopolimer Abu Terbang Dengan Perawatan Suhu Ruang Pratama, Rudy Satriya; Kamaldi, Alfian; Olivia, Monita
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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Abstract

Geopolymers are environmentally friendly materials that utilize inorganic industrial waste rich in silica and alumina such as fly ash which is reacted with alkaline solutions. This study examined the effect of the percentage of Ordinary Portland Cement used as a partial substitute for fly ash against the compressive strength of mortar. The variation in the percentage of OPC used was 5%, 10%, 15%, 20% and 25%. The size of the mortar used was 50 mm × 50 mm × 50 mm. Tests on geopolymer mortar were carried out at 7, 14 and 28 days after the samples were cured under room temperature. The results showed the increase in the use of OPC would increase the compressive strength of geopolymer mortar. The use of OPC with 25% of the fly ash had a compressive strength of 11.2 MPa at 28 days after the samples were cured under room temperature. Furthermore, the compressive strength increased to 180% against the compressive strength of geopolymer mortar with the used 5% OPC. Mortar geopolymers with used of OPC 5%, 10%, 15%, and 20% had compressive strength 4 MPa, 8 MPa, 8 MPa, and 11.2 MPa after the samples were cured under room temperature. The conclusion obtained from this study was that the use of OPC of 25% as a substitute of fly ash in the geopolymer mortar was the optimum percentage which resulted in the maximum compressive strength.Keywords: Mortar, geopolymer, fly ash, compressive strength, OPC cement
Kuat Tekan Dan Kuat Lentur Beton Geopolimer Abu Terbang Hybrid Dengan Pecampuran Portland Composite Cement Noviandri, Rizky; Olivia, Monita; Sitompul, Iskandar Romey
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

The use of Portland Composite Cement (PCC) as a substitute material in fly ash geopolymer hybrid concrete will accelerate the geopolymer reaction since the geopolymer becomes more reactive. In this study, the fly ash geopolymer hybrid concrete used 12 M NaOH concentration, modulus of silicate (Ms) 2.5 and 15% PCC cement, and extra water 80 kg/m3. Geopolymer hybrid concrete treatment were carried out at room temperature. Tests carried out were compressive strength and flexural strength at 7 and 28 days. The results showed the compressive strength of geopolymer hybrid concrete against PCC concrete had a decreasing percentage of difference from 34,54% (6,68 MPa) at 7 days to 20,01% (4,49 MPa) at 28 days. Then, the percentage of flexural strength difference decreased from 31.09% (1.25 MPa) at seven days to 28.55% (1.39 MPa) at 28 days. It was concluded that fly ash did not significantly affect the split tensile strength of geopolymer hybrid concrete 28 at days.The results showed that the compressive strength and flexural strength of the geopolymer hybrid concrete were lower than these of PCC concrete.Keywords : Mechanical properties, hybrid geopolymer concrete, PCC, room temperature.
Pengaruh Konsentrasi Grafena Oksida Dan Curing Temperature Pada Sintesis Mortar Geopolimer Berbasis Limbah Palm Oil Fly Ash (POFA) Najib, Ahmad Ainun; Amri, Amun; Olivia, Monita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research aims to study the effects of graphene oxide addition and curing temperature toward the compressive strength of Palm Oil Fly Ash (POFA) based geopolymer. Matrixes were prepared by mixing treated palm oil fly ash and fine aggregate and continued by preparing alkali activator of 10 M sodium hydroxide and 33,3 mL sodium silicate also different concentration of graphene oxide (0 mg/mL, 1 mg/mL and 3 mg/mL) were mixed for 1 hour. Solid and liquid were mixed together with ratio 0,39 and placed them in geopolymer mortar mold (50 mm x 50 mm x 50 mm) which were cured at room temperature for 1 hour and heated them in oven for 24 hours at different temperature (40oC, 60oC and 80oC). The highest compressive strength was 11.4MPa yielded by adding 3mg/mL of graphene oxide at 80oC.Keywords: compressive strength, curing temperature, geopolymer, graphene oxide, palm oil fly ash
Co-Authors ', Padil A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Abdurrahman, Habib Abrar Rifqi Pratama Abrar Rifqi Pratama Achmad, Fariz Ade Anggriawan Ade T Adrianto Ahmad Adrianto Ahmad Afifuddin, Muhammad Ahmad Hamidi Ainiyyah Fadhilah Aisyah Nurfakhirah Sandyna Aldi Nauri Islami, Aldi Nauri Alfadh, Mhd Raja Alfikri, Nur Ali Imron Rusadi Ali Imron Rusadi Aman Aman Aman Aman Amir Awaluddin Amsal Anwary Amun Amri Ananda, Yazid Fahmi Andi Darmawan Andrian Prasetyo Annisa Arifandita Mifshella Appriliya Destiyani Ardian Yolanda Arief Rijaldo Fajri Arif Rahman Arnef Frenki Asmanovita, Ririn Ayu Nofikasari Azzahra Aqilla Bella Yuherlina Bobby Ansyari Budi Indrawan Chrisfela Wulandari Daniel Kristanto Darusman Darusman Debby Mayangsari Dedi Futra Dessy Wulan Sari Dhea Fitra Yofani Diah Widya Dinni Yunike Jasril Doli Patumona Dwi Susanto Ednor, Meirisa Edy Saputra Edy Saputra Edy Syaputra Elen Tarisa Erika L Ermiyati Erwin Erwin ERWINA JULIANTARI, ERWINA Fadillah, M Lucky Fahri Hafisuddin Fajri Ariefyanto fakhri Fakhri, Fakhri Febriarti, Bernadeta Leni Ferisma Ratu Giri Ferry Fatnanta Fitri Amelia Fredinan Yulianda Gunawan Wibisono Gunawan Wibisono Gussyafri Gustina Gultom Habib Abdurrahman Hagus Tizia Harpian Surya Harriad Akbar Syarif, Harriad Akbar Hendra Dermawan Hutapea, Uliarta Ihsanul Muslim Ika Qoriah Nursuci Ikrammullah, Muhammad Ilham Sordiman Imam Suprayogi Ines Junita Sinuhaji Iskandar R Sitompul Iskandar Romey Sitompul Ismeddyanto Ismeddyanto Ismeddyanto, Ismeddiyanto Ismediyanto Ismediyanto Ismi Siska Rahmayani Ismi Siska Rahmayani Jamili, M Joehari Januar Fitri Jaya Alexander Pandiangan Kamaldi, Alfian Kingkin Dwi Pratiwi L, Erika Lita Darmayanti Lora Mona Tambunan M Hari Bhakti Maharani Miranda Mardiah, Ramona Marisya Wahyuna Marpaung, Horas Saut Maringan Mhd Raja Alfadh Mia Qoryati Miguel Felix Wijaya Miguel Felix Wijaya Milka Novita Manalu Mirza Afrian Mohd. Rizki Novianto Muhammad Afifuddin Muhammad Alfaridzi Adfan Muhammad Farhan Setyawan Muhammad Ikhsan Muhammad Ikhsan Sulaiman Muhammad Rizky Nanda Dwi Putri, Nanda Dwi Nelvia Adi Syafpoetri Niko Rizaldi Niko Rizaldi Niko Rizaldi Novan, Andre Noviandri, Rizky Nur Alfikri Nurdin Nurdin Nurdin Oktariyansa, Randy Pardede Pardede Pardede, Pardede Pradana, Tomy Pratama, Rudy Satriya Qoryati, Mia Rahmani, Syauqi Susana Ramadhan Yanuari Ramadhan Yanuari Randhi Saily Redol Sianturi Reni Suryanita Reny Akmalia Revina Oktaviani Rezha Yaren Rezha Yaren Ria Larici Ridho Rinanda Rijaldo, Arief Rini Safitri Ririn Yuari Farandia Rita Andini RITA ANDINI Rita Yulismawati Rizky Noviandri Rizqy Ridho Prakasa Safridatul Audah Septari, Dinda Shakila Fuadah Lubis Shelly Christina Soewignjo Agus Nugroho Sopian sopian Sormin, Lina S Sri Djuniati Suhendrayatna Suhendrayatna Surgaroni uga Sutikno, Sigit Syaputra, Edy T, Ade Tetty Marta Linda Utama, Panca Setia Wandala Adi Putra Wati, Andini Saras Wicaksono Mahestra Noegroho Widya, Diah Wijaya, Miguel Felix Winda Astuti Halinda Putri Wulan Ramanda Putri Yanuari, Ramadhan Yenita Morena Yofani, Dhea Fitra Yogie Pranata Yudhi Salman Dwi Satya Zakiyul Fuadi Zulfario Anugrah Pratama Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari