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All Journal Jurnal SOLMA BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil JURNAL PENDIDIKAN TAMBUSAI Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Journal of Sustainable Civil Engineering (JOSCE) Teknokris Jurnal Sipil Krisna PRESUNIVE CIVIL ENGINEERING JOURNAL
Lydia Darmiyanti
Universitas Krisnadwipayana
Arts Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation Other

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Analisis Borepile Menggunakan Metode Meyyerhoff dan Reese Wright Lydia Darmiyanti; Yonas Prima; Muhammad Arief Aldianto
Jurnal Sipil Krisna Vol 9 No 1 (2023): Jurnal Sipil Krisna
Publisher : Fakultas Teknik Universitas Krisnadwipayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61488/sipilkrisna.v9i1.249

Abstract

Given that the project site is in a highly populated area and has a geological condition of soil with a relatively high water content, the borepile foundation is the best option. The purpose of this study is to compare settlement estimates made manually and using the Plaxis 3D application, as well as to examine the bearing capability of the borepile foundation utilizing sondir data and conventional penetration tests. The research methodology used to write this final project was a case study, and it involved observation as the primary data collection tool. Using the Mayerhoff method, the following values were determined for the borepile bearing capacity: Qult = 152.403 tons, Qijin = 32.15527, Qtotal = 718.4571, and Qijin = 160.4381. and for SPT data using the Reese & Wright method at borepile point A18 obtained Qu = 1163.89 tons, and Qijin = 387.964 tons. In the manual method of the semi-empirical method and the vesic method for the analysis of the single borepile drop at point A18, S =15 mm and S = 12.8 mm, respectively. The output of the Plaxis 3D program is S = 19.2 mm, and the PDA test results are achieved. S = 5mm. The results of the settlement analysis, which was performed, have complied with SNI 8460: 2017's standards for foundation settlement, which is 25 mm.
Penambahan Serbuk Kayu Kamper terhadap Kuat Tekan Beton Lydia Darmiyanti; Gali Pribadi; Achmad Pahrul Rodji
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 9 No 2 (2021): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v9i2.2861

Abstract

Sawdust waste from the furniture industry should be considered. Nowadays, the increased demand for furniture is in line with the increase in sawdust waste produced. Therefore, it is necessary to make use of sawdust to protect environment. An alternative use is the addition of sawdust as the concrete mixture. Cellulose and hemicellulose compounds are compounds contained in wood powder, where these compounds can provide additional bonding between particles in the cement and sand mixture in concrete. Therefore, concrete can be stronger as well as more water resistant, hence it can be used for a specific purpose in constructions. This study aims to analyze the compressive strength of concrete due to the addition of sawdust as an organic fiber in the concrete mixture with the percentage of 0.25%, 0.50%, 0.75% and 1% as substitution of sand. Organic fibers as additives in concrete are being developed until recently. The proposed concrete was 25 MPa quality. Result showed the increase in the compressive strength of concrete by 0.98% in 1% wood powder mixed at 28 days of concrete age.
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.
Effect of Salt Solution in Electrochemical Stabilization with Variation of Potential Difference on Clay's Shear Strength Lydia Darmiyanti; Ujang Wiharja
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 9, No 1 (2024): EDISI MARET 2024
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v9i1.5434

Abstract

Clay is one of the problematic soils in Indonesia, with a distribution in Java of close to 20% of surface pedology. The biggest problem with clay soil is its ability to swell when it absorbs water and shrink when the water content decreases. Indonesia's tropical climate, where only the rainy and dry seasons, significantly affects clay's swelling potential, hindering the soil's mechanical properties. The significant expansion potential causes the soil to have a slight shear angle, which affects its bearing capacity. This condition underlies the urgency of clay soil improvement to increase the shear strength of the soil. Electrochemical stabilization is one of the effective methods for soils with low permeability. This study aimed to determine the most optimum voltage in electrochemical stabilization using a salt solution. The electrochemical process is used in soil stabilization. This method is used to improve soils with low permeability and high plasticity index (18%), which results in increased bearing capacity and decreased soil development. This study was conducted with four different stress scenarios, and from the results of testing the mechanical properties of the soil, it was found that the greatest shear strength occurred at a stress of 12V. Stabilization of clay soil by electrochemistry can be inferred from the research to increase the value of soil shear strength and affect the increase in soil bearing capacity.
Co-Authors Achmad Pahrul Rodji Ali Khumaidi Asaddulah Mumtaz B.M.A.S. Anaconda Bangkara Budi Setiawan Fidel Castro Gali Pribadi Gita Puspa Artiani Indriasari Ivan Imanuel Martinus Martinus Muhammad Arief Aldianto Muhammad Fahmi Tri Susilo prihartono prihartono Raihan Fauzan Siregar Sahat Martua Sihombing Samrah Hawati Tambunan Sukadi Tuntun Rahayu Wiharja, Ujang Yonas Prima Arga Rumbyarso