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All Journal Journal of Geoscience, Engineering, Environment, and Technology International Journal of Elementary Education JURNAL SAINTIS Journal for Lesson and Learning Studies Indonesian Journal Of Educational Research and Review Ezra Science Bulletin MERDEKA: Jurnal Ilmiah Multidisiplin
Elizar
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Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Health Professions Mathematics Physics Public Health Social Sciences Other

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Journal : Journal of Geoscience, Engineering, Environment, and Technology

 1 
Mechanistic Characteristics of HRS-WC Mixture Using Tabas Stone Waste Coated With Plastic Waste As Aggregate Ariawan, I Made Agus; Wedagama, Dewa Made Priyantha; Elizar; Genta Putra, Komang Alit; I Putu Chandra Wibawa
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.14701

Abstract

Utilization of tabas stone waste and polypropylene (PP) plastic waste has not been carried out massively and optimally because it lacks economic value. The Tabas stone waste can be used as an aggregate for pavement. The porous characteristic of tabas stone results in a high rate of absorption and abrasion, so modifications are made by coating the aggregate with an PP plastic. The aim of this experiment was to determine the characteristics of the HRS-WC mixture with the aggregate of tabas stone coated with plastic. The initial step of this research was testing the tabas stone aggregates, bitumen material, and PP plastic according to the SNI procedure, the next step was Marshall test to find the Optimum Bitumen Content (OBC), the OBC value was obtained by 10%. Coating the aggregate with shredded plastic measuring ± 1 cm2 was done on coarse aggregate only using the dry method with the proportions of plastic are 5% and 10% of the total weight of coarse aggregate. The characteristics of the aggregate coated with plastic decrease in the value of absorption and abrasion, but only 10% of the plastic content met the specifications with a value of 2.5% and 19.63%. The Marshall testing on the HRS-WC mixture with plastic-coated aggregates was done at variations in bitumen content of 8.5%; 9%; 9.5%. The mixture at 5% plastic content only 9.5% bitumen content met the specifications, namely: stability 1352.72 kg, flow 3.39 mm, MQ 402.23 kg/mm, VIM 5.75%, VMA 18.62% , and VFB 69.16%. When at 10% plastic content, only 9% and 9.5% bitumen content met the specifications, namely the stability of 1370.06 kg; 1456.21 kg, flow 3.81 mm; 3.98 mm, MQ 365.31 kg/mm; 370.06 kg/mm, VIM 5.77%; 4.89%, VMA 18.07%; 18; 15%, and VFB 68.05%; 73.04%. Asphalt mixture of 9% bitumen content, 10% plastic content has more ITSM  value compared to 5% plastic content. This is due to the plastic content in the mixture of 10% plastic content which causes the mixture to be stiffness. Asphalt mixture with a plastic content of 5%, with an bitumen content of 9.5% faster than the mixture with an bitumen content of 8.5% and 9% in the ITFT test. Asphalt mixture with a plastic content of 5%, with a variation of bitumen of 8.5% experienced a decrease in the dynamic creep strain value until the bitumen content was 9.5%. A mixture with a plastic content of 5% aggregate coating is recommended for HRS WC that uses tabas stone.
Geotechnical Insights into Andesite Quarry Slope Stability: A Case Study from Desa Usul, Indragiri Hulu, Riau, Indonesia Diondo Simatupang, Ismon; Kausarian, Husnul; Elizar
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.20074

Abstract

This study investigates the slope stability of andesite quarries from a geotechnical and civil engineering perspective, emphasizing geological, geotechnical, and civil engineering factors influencing stability and their implications for mining and infrastructure operations. Andesite is widely used as an aggregate material in construction due to its compliance with Indonesian National Standards (SNI) for aggregate quality. Through comprehensive geotechnical assessments and slope stability analyses, the research concludes that the Andesite quarry slopes exhibit high levels of stability, supporting safe mining practices. Calculated Factor of Safety (FS) values consistently exceed safety thresholds, indicating favorable conditions for resource extraction. Slope simulations using Slide and Geoslope applications confirm the robustness of the slopes, with Safety Factor (FS) values ranging from 1.601 to 2.614. The implementation of open-cut methods, supported by meticulous slope design and blasting techniques, enhances safety and efficiency in mining operations. The study underscores the feasibility and safety of mining activities in the researched area, contributing to the advancement of mining engineering practices in volcaniclastic environments. Effective slope management strategies are essential for ensuring sustainable resource extraction while prioritizing worker safety and environmental integrity.
Prediction the Maximum Deflection of the Prototype of Nailed-slab Pavement System Using the Allowable Equivalent Modulus of Subgrade Reaction Puri, Anas; Oktavia, Ferly; Elizar; Dharmowijoyo, Dimas B.E.; Ali, Mujahid; Liza Evianti Tanjung
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.12061

Abstract

An equivalent modulus of subgrade reaction was proposed for analyzing the Nailed-slab Pavement System. This modulus is defined by accumulating the modulus of subgrade of the slab and the additional modulus of subgrade reaction which is contributed by a pile under the slab. The additional modulus can be defined by the Modified Hardiyatmo Method. The equivalent modulus of subgrade reaction only consideres a safety factor for additional modulus of subgrade reaction. In this research, a global safety factor will be considered for all modulus. This research is aimed to learn the prediction of the slab deflection by using the allowable equivalent modulus of subgrade reaction. The global safety factor was varied by 1.0; 2.0; 2.5; and 3.0. The slab deflection was calculated by using Beam on Elastic Foundation. Data of the nailed-slab and the soil were based on the previous researcher for a single pile nailed-slab model. Results show that the calculated deflection of the slab was in good agreement with the observed deflection. Increasing the global safety factor resulted in the over-estimated slab deflections. It means the design by using allowable equivalent modulus of subgrade reaction tends to result in a safety zone.
Analysis of the Effect of Vehicle Load on Road Layer Damage on Alluvial Bedrock Using PCI and ESAL Approaches: A Case Study of Air Molek–Taluk Kuantan Road, Riau Province, Indonesia Ulum, Bustanul; Elizar; Syahminan, Mohammad
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 3 (2025): JGEET Vol 10 No 03 : September (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.3.23740

Abstract

The Molek-Taluk Kuantan Air Road in Indragiri Hulu Regency, Riau, has suffered a lot of damage due to frequent crossings by heavily loaded vehicles. This study aims to find out how much the vehicle load affects the damage to the road, as well as see how soil conditions and the shape of the area contribute to the worsening of the damage. The assessment was carried out using the PCI (Pavement Condition Index) method to see the level of physical damage to the road, and the ESAL (Equivalent Single Axle Load) method to calculate the vehicle load. The observation results show that the number of vehicles passing by reaches more than 4,000 per day, with a high overload rate (Truck Factor = 3.93). In addition, the soil structure in this region consists of soft soils such as clay and peatlands, which are very susceptible to damage if constantly subjected to heavy loads. The area through which the road passes also has a slope that can cause erosion and soil shift. Overall, the average road condition was in the damaged category (PCI value = 37.4). The results of this study show the need to repair roads that take into account soil conditions, strengthening drainage, and limiting vehicle loads so that damage does not continue to recur.
Co-Authors Agus, Firdaus Ali, Mujahid Alwiah, Sy. Sarah Anas Puri, Anas Anggreana, Vella Apriliatini, Vivi Apriyani, Reni Berta Apriza Berta Apriza D.M Priyantha Wedagama Deru Pratama, Muhammad Dharmowijoyo, Dimas B.E. Diondo Simatupang, Ismon febby yolanda Febriani, Sonia Ferly Oktavia Genta Putra, Komang Alit Harianto, Hengky Husnul Kausarian I Made Agus Ariawan I Putu Chandra Wibawa Illahi, Rendi kurnia Irawan Suprapto Khairudin Lubis, Azhar Liza Evianti Tanjung Munandar, Edo Muntazah, Adinda Novita Sari Pocut Faradina , Meutia Pratiwi, Agustin Adelia Sisca Putri, Kharisma Putri, Siti Anisa R Rohmani Sapitri Sri Hartati Dewi Sumarno Sumarno Sumarno Syahminan, Mohammad Syahminan, Mohd Ulum, M Bustanul Yasinta Mahendra, Yasinta