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All Journal PRESUNIVE CIVIL ENGINEERING JOURNAL
Ivan Imanuel
president university
Arts Civil Engineering, Building, Construction & Architecture Control & Systems Engineering

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Effect of Electrokinetic Soil Improvement on CBR Value of Expansive Clay Lydia Darmiyanti; Ivan Imanuel; Prihartono Prihartono
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol. 3 No. 1 (2025)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v3i1.5881

Abstract

Improvement of low permeability soils with high plasticity index and high shrinkage expansion cannot be done by soil compaction or consolidation. The structure of expansive clays is influenced by the history of soil formation. Expansive soil structure is composed of two tetrahedra with one octahedron. Van der Waals bonds bind them together. Kolinite, illite, and montmorillonite are minerals in expansive soils. Montmorillonite has the weakest bond of the others so that other elements can easily enter the clay structure and bind to it. The ability of clay soil to absorb water or other minerals that come close is due to its cation exchange capacity (CEC). Clay, with its negative ions, will attract positive ions that approach the soil surface. Water with H+ content will easily enter into the structure of the clay soil, bond with it, and cause the soil to swell.Electrokinetic soil improvement is effective on clay soils. With the nature and characteristics of clay soil, positively charged stabilizing ions are required. Positive ions will enter due to the CEC process and affect the mineral content of the soil, thereby improving the physical and mechanical properties of the clay soil. Therefore, this research needs to be conducted to improve clay soil using the electrokinetic method with a calcium dioxide solution. An increase in the Bearing Capacity Ratio (CBR) value occurred after being improved by electrokinetics using four variations of voltage application.The variation of applied voltage gives different results to the change of soil mechanical properties. The original soil CBR of 0.093% increased for all stress applications. The optimum CBR value occurred in the soil applied with 15V. The resulting CBR increase reached 200% of the original soil CBR.
Comparative Structural Seismic Performance of a 10-Story Commercial Building Using Lightweight Precast Concrete Panels and Lightweight Brick Wall Systems Naisha Elvira Tanjung; Ivan Imanuel; Ika Bali
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol. 3 No. 2 (2025)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v3i2.6323

Abstract

This study presents a comparative seismic performance analysis of a 10-story commercial building in North Jakarta, an area characterized by high seismicity and challenging geotechnical conditions. Two identical structural models were analyzed using ETABS v2022: one using a lightweight precast concrete panel system (JOE Green X3) and the other using a conventional Autoclaved Aerated Concrete (AAC) lightweight brick system. The aim is to compare the seismic structural performance of the analysis, based on the response spectrum method in accordance with SNI 1726:2019, revealed that the precast concrete panel system, was 14.4% lighter than the AAC lightweight bricks system when accounting for its full installed weight, including plaster and bracing columns. It resulted in a shorter fundamental period (0.412 s) compared to 0.453 s of the AAC lightweight brick system. However, the seismic base shear forces are nearly identical due to compensating effects in the site-specific response spectrum. Although both systems meet the deflection limits mandated by regulations, their performance is direction-dependent. This study concludes that the substantial reduction in total mass of the precast panel system provides a shorter vibration period but comparable seismic performance to the AAC lightweight brick system.
Traffic-Based Emission Assessment and Modal Shift Analysis Using a Harmonized Emission Factor Approach: A Case Study of the Kalimalang Corridor Ivan Imanuel; Prihartono Prihartono; Krisnanda Teguh Saputra
PRESUNIVE CIVIL ENGINEERING JOURNAL Vol. 4 No. 1 (2026)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/pcej.v4i1.6647

Abstract

Co-Authors Ika Bali Krisnanda Teguh Saputra Lydia Darmiyanti Naisha Elvira Tanjung prihartono prihartono