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All Journal JURNAL CRANKSHAFT Jurnal Cahaya Mandalika
Yusri Anugerah Manapa Ambabunga
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Humanities Control & Systems Engineering Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering

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Pengaruh Zeolit Dan Abu Cangkang Telur Sebagai Bahan Stabilisasi Terhadap Nilai CBR Tanah Henrianto Masiku; Yusri Anugerah Manapa Ambabunga; Ermitha Ambun Rombe Dendo; Rudolf Masiku
Jurnal Cahaya Mandalika ISSN 2721-4796 (online) Vol. 5 No. 2 (2024)
Publisher : Institut Penelitian Dan Pengambangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/jcm.v5i2.3428

Abstract

Soil is the place where construction is built, thats why the soil must have a high bearing capacity. Clay is a fine-grained soil that has low bearing capacity. its necessary to improve it so that the construction can be built and provide a longer service life. Soil improvement to increase the bearing capacity of the soil can be done by stabilization. Soil stabilization using mixed materials is expected to minimize unfavorable soil properties. This research aims to evaluate the impact of using eggshell ash and zeolite as a stabilizer on the bearing capacity of the soil, in this case the CBR value of the soil. The method used is an experimental study in the laboratory. Sample testing was carried out at the UKI Toraja Civil Engineering Geotechnical Laboratory. Stabilizing materials include egg shells and natural zeolites. Egg shells and natural zeolite are burned until then ground and filtered using sieve No. 200 (0.075 mm) until ash is obtained. The variations of eggshell ash and natural zeolite used in this research were 0%, 4%, 6% and 8% of the dry weight of the soil and variations of eggshell ash of 4% of the dry weight of the soil. From the test results obtained, it can be seen that the combined use of zeolite and eggshell ash as a clay soil stabilization material can increase the CBR value of the soil in variations of Zeolite 4% and ACT 4%, Zeolite 6% and ACT 4% as well as Zeolite 8% and ACT 4%. – respectively 8.0 %, 25.3 % and 36.4 for soil without stabilization material.
PEMODELAN SISTEM AKTUATOR PNEUMATIK UNTUK PENGENDALIAN FLEKSIBILITAS BODI KENDARAAN Christof Geraldi Simon; Formanto Paliling; Risa Lasarus; Yusri Anugerah Manapa Ambabunga; Simon Ka'ka; Festo Andre Hardinsi
JURNAL CRANKSHAFT Vol. 9 No. 2 (2026): Jurnal Crankshaft Vol. 9 No. 2 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i2.17420

Abstract

This research aims to develop a flexible vehicle body system based on pneumatic actuators to increase the dimensions of limited parking spaces. The methods used include system modeling, electropneumatic control array design, simulation using FluidSIM, and experimental prototype implementation and testing. The control system is designed using a 5/2 directional valve with dual solenoid actuation (Y1 and Y2) that regulates the flow of pressurized air into the pneumatic cylinder to produce a translational motion of the piston that changes the length of the vehicle body linearly Modeling is focused on the relationship between control inputs, actuator response, and structural dimensional changes. Simulations are performed to validate the control logic and response characteristics prior to physical implementation. A length flexibility target of 300 mm is set as a design parameter to meet the parking needs of tight spaces. The test results showed that the system was able to change the length of the vehicle body from 2340 mm to 2040 mm, resulting in a range of flexibility of 300 mm according to the target. These findings show that the proposed method is effective in producing a controlled and applicative adaptive body mechanism, and has the potential to be an engineering solution to improve the efficiency of parking space utilization in land-limited environments.
Co-Authors Christof Geraldi Simon Dendo, Ermitha Ambun Rombe Festo Andre Hardinsi Formanto Paliling Henrianto Masiku Risa Lasarus Rudolf Masiku Simon Ka'ka