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All Journal JTT (Jurnal Teknologi Terpadu) Potensi : Jurnal Sipil Politeknik Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Journal of Applied Civil Engineering and Infrastructure Technology (JACEIT) Kontribusi: Jurnal Penelitian dan Pengabdian Kepada Masyarakat Journal of Civil Engineering and Vocational Education
Utomo, Gunaedy
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Journal : Journal of Civil Engineering and Vocational Education

 1 
The Compressive Strength of Unfired Clay Brick with MICP Reinforcement Ochtharima, Zaerima Zahira; Indriani, Andi Marini; Utomo, Gunaedy; Maslina, Maslina
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.637

Abstract

Industrial waste in the form of sewage sludge, which is often overlooked, can have significant environmental impacts, especially polluting groundwater and surface water sources. This pollution leads to degradation of water quality, reduces the availability of clean water, and affects ecosystems. To reduce these impacts, sewage sludge can be utilized in the manufacture of construction materials, such as bricks, which is considered an economical and environmentally friendly solution. Fireless brick making, in accordance with the concept of green building, avoids air pollution from the firing process. This study explores the use of Bacillus huizhouensis bacteria in the Microbially Induced Calcite Precipitation (MICP) method to improve the strength of fireless bricks. Bacillus huizhouensis, which can hydrolyze urea and produce calcium carbonate (CaCO₃) or calcite, was chosen for its ability to produce CaCO₃ under alkaline conditions. Bacillus Huizhouensis bacteria were used to strengthen bricks with 15%, 20%, and 25% bacteria concentration variations with culture ages of 8 hours, 10 hours, and 15 hours.  The results showed that the addition of 15% sewage sludge and 25% Bacillus huizhouensis bacterial solution with a culture age of 10 hours produced the highest compressive strength of 34.20 Kg/cm² (3.35 MPa), compared to sewage sludge bricks without bacteria (13.87 Kg/cm² or 1.36 MPa). Although showing significant improvement, this value is still below the SNI 15-2094-2000 standard of 50 Kg/cm² (5 MPa).
The Effect of Compressive Strength Paving Blocks Utilizing Polypropylene Plastic Waste Vetryx, Vanessa Regina; Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.662

Abstract

Waste is a big problem for every country in the world, including cities. Currently, the city of Balikpapan is experiencing rapid economic and population growth, of course the growth also brings challenge in waste management, especially plastic waste. The type of plastic waste than we often encounter especially in coffe shops is Polypropylene (PP). In this research, pp type plastic waste is recycled as a substitute for cement in paving blocks with a composition of 30%, 40%, 50% to sand. The test conducted on this research is compressive strength. The purpose of this research is to determine the effect of PP plastic melt mixture on paving block mortar on increasing compressive strength. From the research results obtained the maximum compressive strength value for the composition of 50% Polypropylene : 50% sand with a compressive strength value of 11,83 Mpa. Similiarly, with the composotion of 40% Polypropylene : 40% sand, this value of is included in the quality D which can be used for parks according to SNI 03-0691-1996. While the 30% composition is not included in the quality.
The Influence of Biocementation on the Compressive Strength of Fireless Bricks Natalia, Natalia; Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.664

Abstract

Waste sludge from the Water Treatment Plant (IPA) is used as an additive in the manufacture of environmentally friendly bricks to reduce river pollution. In the process of making these bricks, clay is mixed with sewage sludge at 15% of the total weight of clay. In addition, to reduce the impact of air pollution, the bricks were not burned. This research emphasizes the importance of using environmentally friendly alternative materials in brick production. Bacillus Huizhouensis bacteria was applied to strengthen bricks with variations of bacteria concentration of 8%, as well as bacterial culture age variations of 8 hours, 10 hours, and 15 hours. After the bricks were matured for 14 days, the test results showed that bricks using 8% bacterial solution with 10 hours of culture increased by 70.65% to 1.57 MPa, compared to normal bricks of 0.92 MPa. So that bricks with 8% bacteria with a culture age of 10 hours with a period of 14 days have a higher value than normal bricks.
Comparative Analysis of Bearing Capacity of Pile Foundation Using Van Der Ween, Philipponnat, and Meyerhof Methods Hidayatullah, Muhammad Fitrah; Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.3

Abstract

Soil has different characteristics so that it becomes a lot of problems in Civil Engineering construction, especially in foundation planning, it must be done carefully and use several methods as a comparison. This research is to compare the three methods of calculating the bearing capacity of bored pile foundations: Van Der Ween, Phillipponnat, and Meyerhof. The selection of an apposite method in bearing capacity analysis is important to confirm the safety of the building structure. The Van Der Ween Method is a more modern and detailed approach compared to the Meyerhof Method, it takes into account the negative impact of the lateral deformation of the pile, which improves the accuracy of its calculation. The Philipponnat Method is a method that combines aspects of both the Meyerhof Method and the Van der Ween Method, it considers load characteristics and soil properties like Meyerhof, while also accounting for lateral deflection of the piles like Van der Ween. The results show that each method has advantages and disadvantages in determining the bearing capacity of bored pile foundations. Analysis revealed factors such as pile diameter, soil depth, and maximum applied load affect the accuracy of the three methods. This research provides important insights for construction planners in selecting a suitable method for bored pile foundation bearing capacity analysis. It is recommended that soil characteristics and pile geometry be considered before selecting the most appropriate calculation method. This research can be extended by considering other methods and conducting validation through experimental analysis.
Fireless Brick Making using Water Treatment Sewage Sludge with MICP Action Saputri, Evi Ari Ayu; Indriani, Andy Marini; Utomo, Gunaedy
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.327

Abstract

Bricks materials used in making the walls of building. Currently, brick making has new innovations. As in this study using water treatment sludge waste and bacillus subtilis bacteria. Sludge waste done with percentage of 20% and bacillus subtilis bacteria much as 6%. The process adding bacteria called the Microbially Induced Calcite Precipitation (MICP) process. The process to increase compressive strength clay soil. The purpose study to determine effect of Bacillus subtilis bacteria on the strength bricks using mud and the strength of bricks with bacterial reinforcement. The results showed the compressive strength did not the specifications, where value of the compressive strength of bricks in accordance with SNI 15-2094-2000 is 50 kg / cm². And results of compressive strength only amounted to 22.82 kg / cm² in the 28-day curing period. For compressive strength using mixture of bacteria produces highest strength value the 4-day culture period of 28.11 kg kg/cm².
Pengaruh Microbially Induced Calcite Precipitation (MICP) terhadap Perilaku Kuat Geser Tanah Terkontaminasi Batubara Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 10 No. 1 (2023): March 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i1.362112

Abstract

Microbially induced calcite precipitation (MICP) adalah teknik perbaikan tanah dengan menggunakan mikroorganisme yang mampu mengubah dan meningkatkan sifat mekanik dan fisik. Dalam penelitian ini, uji geser langsung dengan mengacu pada standard SNI 03-3420-1994 digunakan untuk mengetahui pengaruh pengendapan calcite terhadap perilaku kuat geser tanah terkontaminasi batubara. Bakteri Bacillus subtilis sebanyak 6% ditambahkan ke dalam tanah yang terkontaminasi 5%, 10% dan 15% batubara. Bakteri yang digunakan menggunakan kultur 3 hari dimana berada pada fase stasioner. Hasil penelitian menunjukkan bahwa terjadi peningkatan yang cukup baik terhadap nilai kohesi dan sudut geser dalam sebagai parameter kuat geser setelah masa pemeraman. Stabilisasi MICP pada tanah terkontaminasi 5% batubara meningkatkan kuat geser sebesar 3 kali lipat sedangkan pada tanah terkontaminasi 10% dan 15% batubara terjadi peningkatan kuat geser masing-masing sebesar 7 dan 15 kali lipat dibandingkan dengan tanah asli.
Pengaruh Siklus Basah Kering terhadap Perilaku Mekanik Tanah Lempung Stabilisasi Biosementasi dengan Bakteri Bacillus Subtilis Indriani, Andi Marini; Utomo, Gunaedy; Syahputra, M Ryan
CIVED Vol. 10 No. 2 (2023): June 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i2.399

Abstract

Tanah lempung mempunyai daya dukung sangat kecil sehingga banyak menjadi masalah pada pekerjaan di bidang Teknik Sipil terutama pada negara dengan 2 musim seperti Indonesia. Siklus basah kering akibat perubahan musim ini tentu akan menyebabkan perubahan pada daya dukung tanah. Pada musin panas biasanya daya dukung cukup tinggi tetapi dimusim hujan daya dukung akan sangat rendah. Perkembangan metode stabilisasi tanah semakin baik dengan munculnya beberapa ide inovatif salah satunya dengan metode stabilisasi menggunakan mikroorganisme yang dikenal dengan istilah biosementasi. Tetapi metode ini harus terus dikaji terutama pengaruh siklus basah kering terhadap perubahan nilai CBRsoaked tanah lempung. Salah stu jenis mikroorganisme yang mampu menghasilkan CaCO3 yang dapat meningkatkan daya dukung tanah adalah bakteri Bacillus Subtilis. Penelitian yang dilakukan dengan menerapkan metode curing yang berbeda dimana tanah diperam selama 14 hari dengan metode soaked yaitu dikeringkan selama 10 hari dan direndam selama 4 hari, Metode 1 Siklus A dengan cara di rendam selama 6 hari kemudian dikeringkan selama 8 hari dan metode 1 siklus B di keringkan selama 6 hari lalu dilakukan perendaman selama 6 hari dan dikeringkan selama 2 hari baru di uji untuk mengetahui perubahan sifat mekanis tanah California Bearing Ratio (CBR) dengan variasi campuran bakteri umur kultur 1 hari sebanyak 3%, 4.5% dan 6%. Hasil pengujian menunjukkan metode Soaked lebih baik dibandingkan metode 1 Siklus A dan B. Terjadi peningkatan nilai CBR dibandingkan dengan tanah asli dimana dengan metode Soaked meningkat hingga 5 kali lipat, metode 1 Siklus A sebersar 89% sedangkan metode 1 Siklus B hanya meningkat 15%.
Influence Utilization Waste Plastic Polyethylene Terephthalate on the Flexural Strength of Concrete with Use East Kalimantan Aggregate Damayanti, Dinda Indah; Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.443

Abstract

Environmental pollution is still an issue that cannot be ignored. This type of waste causes environmental pollution due to its large and difficult to be recycled is Polyethylene Terephthalate (PET) plastic. So it is important to make an effort to utilize the plastic. On the other hand in the world of construction, the use of concrete increases every day causing the need for many new material sources in order to cover the needs of concrete mixtures. One of the abundant sources of aggregate is East Kalimantan aggregate but has not been used much. so combining East Kalimantan aggregate and PET plastic as a concrete constituent material becomes interesting to be analyzed, especially to determine the characteristics of the flexural strength of concrete. The flexural strength is based on SNI 03-4431-2011 method and tested at the age of 14 and 28 days. PET plastic chopped to a size of 5 cm long and 1-3 mm wide with variations 0.5%; 0.65%; and 0.8% of the weight of sand. The total number of samples is 24 blocks size of 15 × 15 × 60 cm. The results indicate that the flexural strength characteristics of concrete using local East Kalimantan aggregates and using PET plastic as a partial substitute for fine aggregate increased as the number of PET substitutions. Concrete without PET plastic has 3.187 MPa. In comparison with to normal concrete, 0.5% PET substitution increased by 3.07%, 0.65% PET variation increased by 3.63% and 0.8% PET variation increased by 4.32%.
Construction of Temporary Landfill Shield by Utilizing MICP Stabilized Water Treatment Plant Sludge Waste Natasya, Priskha Tri; Indriani, Andi Marini; Utomo, Gunaedy
CIVED Vol. 10 No. 3 (2023): September 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i3.478

Abstract

The addition of Bacillus Subtilis bacteria to the mud soil at IPAM (Integrated Wastewater Treatment Plant) Perumda Tirta Manuntung Km.8 in Balikpapan City aimed to enhance its suitability as a temporary cover layer in places like landfills. Initial mud testing revealed key characteristics: Chemical Characteristics: The mud's specific chemical composition was identified, providing a foundation for a deeper understanding of its properties. Physical Characteristics: The mud falls into the fine-grained soil category, with 63% of particles passing through a No. 200 sieve. Moisture content is high at 42.54%, primarily composed of silt (39.8%) and clay (25%). Mechanical Characteristics: Standard proctor tests yielded a maximum dry unit weight of 1.099 gr/cc and an optimum water content of 33.65%. Initial soil permeability met temporary landfill cover criteria, with a permeability value of 5.04×10-4 cm/s. Further research demonstrated that by introducing Bacillus Subtilis bacteria at varying concentrations and incubation periods, mud permeability could be altered. The highest permeability, 4.27×10-4 cm/s, was achieved with an 8% bacteria concentration and a 7-day incubation period, while the lowest permeability, 1.19×10-5 cm/s, resulted from an 8% bacteria concentration and a 28-day incubation period. These findings suggest that Bacillus Subtilis addition can modify mud permeability, making it more suitable as a temporary landfill cover. This presents a potential solution for more effective IPAM management.
The Influence of Immertion on Marshall Parameters and Residual Strength Index of Rubber Asphalt Mixture Indriani, Andi Marini; Utomo, Gunaedy; Amirudin, Amirudin
CIVED Vol. 11 No. 1 (2024): March 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i1.542

Abstract

The bad drainage system in the road pavement area also causes the road body to be submerged in water for quite a long time, causing the bond between the asphalt and aggregate to loosen, resulting in decreased service life. Developments in the field of road construction have now implemented many innovative ideas, one of which is namely the use of rubber asphalt with asphalt containing natural rubber which has 1.5 to 2 times the strength compared to conventional asphalt. In evaluating the performance of an asphalt mixture, especially the AC-WC Wear layer mixture, it can be analyzed using the Marshall test method by taking into account the conditions being tested, namely the test object being immersion in water or continuously flooded with water. The method used in this research is an experiment with treatment conditions for AC-WC rubber asphalt mixture specimens which are continuously immersion in water for 1 day, 2 days and 3 days. The research results showed that there was an increase in the VMA, VIM, and flow parameters, while the VFB, stability, and Residual Strength Index parameters decreased with increasing soaking time. Based on the research results, it can be concluded that although there is an influence on the performance of the asphalt mixture with the use of rubber asphalt, the decrease that occurs is not too large and is still within the required specifications.
Co-Authors Al Hidayat, Fauzi Amirudin Amirudin Andi Marini Indriani, Andi Marini Anggraeni, Rosalin Delia arlita, reggina gita Az’Zahrah, Yuninda Casmudi, Casmudi Damayanti, Dinda Indah Delia, Rosalin Fauzi, Muhammad Muis Harami, Fachruddin Hidayatullah, Muhammad Fitrah Ikram, Muhammad Fadhli Dzil Indriani, Andy Marini Indriyani, Andi Marini Khoiriyah, Dewi Isroul Kusuma, Santos Surya Marini Indriani, Andi Maslina Maslina, Maslina Natalia Natalia Natasya, Priskha Tri Ochtharima, Zaerima Zahira Ramadhan, Atma Haical Sani, Abdu Saputri, Evi Ari Ayu Syahputra, M Ryan Tesiana, Selina Vetryx, Vanessa Regina Yacub, Muh Alpian