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All Journal Reviews in Civil Engineering Scripta Technica: Journal of Engineering and Applied Technology Resocia: International Journal of Applied Research and Innovation Technema: Journal of Intelligent Engineering and Computing
Lisa Fitriyana
Universitas Islam Sultan Agung Semarang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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 1 
PENGARUH FELDSPAR DAN AMPAS TEBU TERHADAP PROPERTIS TANAH EKSPANSIF Selvia Agustina; Lisa Fitriyana
Reviews in Civil Engineering Vol 3, No 1 (2019): Reviews in Civil Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/rice.v3i1.1259

Abstract

Salah satu upaya perbaikan tanah ekspansif adalah dengan stabilisasi, yaitu mencampurkan tanah dengan semen. Namun penggunaan semen memerlukan biaya besar. Oleh sebab itu, perlu pengganti semen. Pada penelitian ini, semen diganti dengan feldspar dan ampas tebu. Tujuannya adalah mengetahui pengaruh karakteristik tanah ekspansif setelah dicampur dengan feldspar dan ampas tebu, serta mengetahui campuran yang lebih baik dalam stabilisasi tanah ekspansif.Penelitian ini menggunakan feldspar dan ampas tebu dengan kadar campuran 5%, 10%, dan 15%. Propertis tanah ekspansif yang dimodifikasi ditinjau dari pengujian atterberg limit dan direct shear. Hasil dari pengujian tersebut berupa indeks plastisitas (PI), liquid limit (LL), shrinkage limit (SL), kohesi (c), dan sudut geser dalam (j) dari campuran tanah.Hasil menunjukan bahwa karakteristik tanah ekspansif yang dicampur dengan feldspar dan ampas tebu mengalami penurunan indeks plastisitas (PI) dan kohesi (c) sedangkan sudut geser dalamnya (j) semakin tinggi. Campuran yang paling baik adalah menggunakan feldspar dengan kadar 15%.
Stabilisasi Tanah Lunak Menggunakan Campuran Ferronickle Slag dan Alkali Soma Shaki Hadi Nugraha; Dzulfikar Sani; Lisa Fitriyana; Juny Andry Sulistyo
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/vrm3vy68

Abstract

The Kendal Industrial Park (KIK), Central Java, is characterized by soft clay soil with low bearing capacity, requiring improvement before being used as a construction foundation. This study aims to determine soil classification, analyze the effect of ferronickel slag and alkali (NaOH and KOH) mixtures, and evaluate the potential of these mixtures as soil stabilization materials. The research was conducted experimentally in the laboratory through specific gravity tests, grain size distribution analysis, Atterberg limits, Standard Proctor compaction test, direct shear test, and California Bearing Ratio (CBR) test. The mixture variations used consisted of 10% ferronickel slag combined with alkali solutions of NaOH and KOH at concentrations of 6%, 8%, and 10%. The results showed that the original soil was classified as fine-grained soil with high plasticity and a CBR value of 5.6%, indicating low bearing capacity. The addition of ferronickel slag and alkali reduced soil plasticity and increased soil strength and bearing capacity. Therefore, the mixture of ferronickel slag and alkali has the potential to be used as an environmentally friendly alternative soil stabilization material.  
Perencanaan Ulang Struktur Bawah Gedung dengan Fondasi Tiang Pancang: Studi Kasus Proyek Pembangunan Rumah Susun Pekerja Industri Batang III JTGRSN21-03 Abimanyu Wahyu P.S.P.; Adi Prasetyo Pambudi; Soedarsono Soedarsono; Lisa Fitriyana
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/715f1x10

Abstract

Pile foundations play an important role in ensuring the stability of multi storey buildings subjected to axial loads, lateral loads, and moments. In the Batang III Industrial Worker Housing Project (JTGRSN21-03), the original foundation system used bored piles. This study redesigns the foundation into spun piles with a diameter of 0.80 m and a length of 12 m under the same soil conditions and loads. The research methodology was conducted through analysis of three foundation joints. Axial bearing capacity was evaluated using the Meyerhof method, resulting in a tip resistance of 946.00 kN, skin friction resistance of 2,970.37 kN, ultimate bearing capacity of 3,916.37 kN, and allowable bearing capacity of 1,305.46 kN. Lateral bearing capacity was analyzed using the Broms method with an allowable capacity of 162.0 kN. Group pile bearing capacity was determined using the Converse Labarre method. Settlement analysis using the Vesic method showed a single pile settlement of 22.69 mm and group settlements of 50.2 mm at joint 599, 41.8 mm at joint 628, and 21.0 mm at joint 371. Plaxis analysis produced smaller settlements of 13.94 mm, 13.44 mm, and 9.19 mm. The pile cap and shear wall design is considered safe.  
Evaluasi Kinerja Penanggulangan Kelongsoran Lereng pada Timbunan Tinggi Menggunakan Bronjong Berbasis Analisis Plaxis V24.3.0: Studi Kasus Candisari, Kota Semarang Nazala Trisnadyani; Nur Mukti Afiatillah; Lisa Fitriyana
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/4kj9y876

Abstract

This study evaluates the performance of gabion reinforcement in mitigating slope failure on a high embankment slope in Candisari, Semarang City, using finite element analysis based on PLAXIS V24.3.0. The research integrates field observations, laboratory geotechnical testing, and numerical simulation to investigate slope deformation behavior, safety factor characteristics, and hydro mechanical responses under varying groundwater conditions. The numerical model was developed using plane strain analysis with staged construction procedures and strength reduction factor methods to represent actual field conditions. The results indicate that the unreinforced slope experienced significant deformation and a critical safety factor associated with progressive failure mechanisms. The installation of gabion structures improved slope stability by reducing horizontal and vertical displacement, redistributing effective stress, and shifting the slip surface away from the critical zone. Variations in groundwater level significantly affected slope performance through increased pore water pressure and reduced effective stress conditions. The study confirms that gabion reinforcement provides effective structural resistance for high embankment slopes, although hydraulic sensitivity remains a controlling factor in long term stability performance.  
Analysis of Asphalt Concrete Wearing Course (AC-WC) with the Addition of Bodri River Sand and Styrene-Butadiene Rubber (SBR) for Road Pavements Muhammad Erland Farrel; Dimas Syahrul Zuda; Juny Andry Sulistyo; Lisa Fitriyana
Technema: Journal of Intelligent Engineering and Computing Vol. 1 No. 3 (2026): Technema: Journal of Intelligent Engineering and Computing
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Road pavement in Indonesia commonly uses Asphalt Concrete Wearing Course (AC-WC) as the surface layer, which plays an important role in providing traffic comfort and pavement performance. This study aims to evaluate the characteristics of AC-WC mixtures modified with Styrene-Butadiene Rubber (SBR) and Bodri River sand and to determine the optimum mixture based on Marshall parameters. The use of these locally available materials is expected to contribute to the development of alternative asphalt mixture compositions while supporting the utilization of local resources. An experimental method was employed through laboratory specimen preparation and Marshall testing. The specimens were prepared using variations of SBR content of 0%, 2%, 4%, and 6% and Bodri River sand content of 0%, 1%, 3%, and 5%. Marshall testing was conducted to determine VMA, VIM, VFB, stability, flow, and Marshall Quotient values. Based on the test results, the best Job Mix Design was obtained from the mixture containing 3% Bodri River sand and 4% SBR (P3S4). This mixture produced VMA of 19.33%, VIM of 3.53%, VFB of 81.73%, stability of 1,119.14 kg, flow of 3.00 mm, and Marshall Quotient of 364.32 kg/mm. The results indicate that the P3S4 mixture satisfied the specified Marshall requirements and provided favorable volumetric and mechanical characteristics. Therefore, the combination of 3% Bodri River sand and 4% SBR can be considered a suitable mixture variation for AC-WC pavement applications based on the results of this study.
An Experimental Study on the Use of Teak Wood Ash and Bengawan Solo Sand as Filler Additives in Asphalt Concrete – Wearing Course (AC-WC) Muhammad Farid Muchyyidin; Naufal Rifqi Hanan; Juny Andry Sulistyo; Lisa Fitriyana
Technema: Journal of Intelligent Engineering and Computing Vol. 1 No. 3 (2026): Technema: Journal of Intelligent Engineering and Computing
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

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Abstract

Asphalt Concrete–Wearing Course (AC-WC) is the surface layer of flexible pavement that directly receives traffic loads and is exposed to environmental conditions. This study investigated Bengawan Solo sand as a partial aggregate substitution and teak wood sawdust ash as a filler in AC-WC mixtures. The study aimed to evaluate their effects on Marshall characteristics and determine the optimum combination based on the 2025 Bina Marga General Specifications. An experimental laboratory method was employed using 60/70 penetration grade asphalt, aggregates conforming to the specifications, Bengawan Solo sand substitution levels of 0%, 1%, 2%, and 3%, and teak wood sawdust ash contents of 0%, 0.4%, 0.8%, and 1.2%. Marshall testing was conducted to determine stability, flow, Marshall Quotient (MQ), Void in the Mix (VIM), Void in Mineral Aggregate (VMA), and Void Filled with Asphalt (VFA). The results showed that the 2% Bengawan Solo sand substitution group consistently satisfied the specified Marshall requirements. The optimum mixture was P2A0.4, consisting of 2% Bengawan Solo sand substitution and 0.4% teak wood sawdust ash, with VIM of 4.42%, VMA of 22.26%, VFA of 80.14%, stability of 850.80 kg, flow of 2.62 mm, and MQ of 323.50 kg/mm. The highest stability value of 965.34 kg was obtained from P2A1.2, while the lowest value of 818.08 kg occurred at P3A0.4, with both values remaining above the minimum stability requirement of 800 kg. These results indicate that Bengawan Solo sand substitution and teak wood sawdust ash addition can provide favorable Marshall characteristics when their proportions are appropriately controlled, with P2A0.4 demonstrating the most balanced overall performance among the investigated mixtures.
The Effect of Stabilizing the California Bearing Ratio (CBR) and Unconfined Compression Strength (UCS) of Clay Soil Using Fly Ash and Slacked Lime Irfan Adli Hendriyansyah; Muhammad Mukmin Mustafiq; Soedarsono Soedarsono; Lisa Fitriyana
Technema: Journal of Intelligent Engineering and Computing Vol. 1 No. 3 (2026): Technema: Journal of Intelligent Engineering and Computing
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

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Abstract

Clay soil is frequently encountered in road and building construction, yet its low bearing capacity, high plasticity, and sensitivity to moisture variations can limit its suitability as a subgrade material. This study aims to characterize clay soil from the Kaligawe area of Semarang and evaluate the effects of fly ash, hydrated lime, and their combination on California Bearing Ratio (CBR) and Unconfined Compression Strength (UCS). An experimental laboratory approach was employed using untreated soil and stabilized specimens with additive contents of 2%, 4%, 6%, 8%, 10%, 12%, 15%, and 20% based on dry soil weight. The testing program comprised Atterberg limits, Standard Proctor compaction, soaked and unsoaked CBR, and UCS tests. The untreated soil exhibited a Liquid Limit of 65.375%, Plastic Limit of 27.611%, Plasticity Index of 37.764%, unsoaked CBR of 4.80%, soaked CBR of 3.10%, and UCS of 0.867 kg/cm². Fly ash achieved optimum CBR values at 15%, reaching 12.20% unsoaked and 8.80% soaked, whereas hydrated lime achieved 19.60% unsoaked and 17.00% soaked at 10%. The combined treatment produced the highest unsoaked CBR of 21.20% and UCS of 2.284 kg/cm² at 10% fly ash + 10% hydrated lime. UCS values for fly ash and hydrated lime individually reached 1.725 and 2.198 kg/cm², respectively. The findings demonstrate that combined stabilization effectively enhances clay performance, with 10% + 10% identified as the optimum composition.
Structural Feasibility Analysis of PT Phapros Building Subjected to Additional Machinery Loads Ilham Nadhif Pratama; Muhammad Rizal Ramli; Antonius Antonius; Lisa Fitriyana
International Journal of Applied Research and Innovation Vol. 1 No. 3 (2026): : July: Resocia: International Journal of Applied Research and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/ae5c5468

Abstract

This study evaluates the structural feasibility of Building H at PT Phapros Tbk Semarang under existing conditions and after the planned addition of machinery loads. The assessment combined visual inspection, non-destructive testing using Rebound Hammer, Rebar Detector, Ultrasonic Pulse Velocity, carbonation testing, and structural analysis using ETABS. Structural performance was evaluated according to SNI 2847:2019, SNI 1726:2019, and SNI 1727:2020. The results show that the existing concrete condition was generally adequate, while structural deficiencies were identified in several critical components. Inter-story drift in the upper stories exceeded the allowable limit, indicating insufficient seismic performance. Beam sections generally satisfied flexural requirements, although several support regions were inadequate in shear. The columns did not satisfy the Strong Column–Weak Beam requirement and showed deficiencies in flexural, shear, and confinement performance. After the addition of machinery loads, column axial and bending demands increased considerably, while the maximum slab moment increased from 6.44 to 18.58 kN·m but remained below its reduced flexural capacity of 37.09 kN·m. Structural strengthening, particularly of the column system, is required before the additional machinery is permanently installed.  
Co-Authors Abimanyu Wahyu P.S.P. Adi Prasetyo Pambudi Antonius Antonius Dimas Syahrul Zuda Dzulfikar Sani Ilham Nadhif Pratama Irfan Adli Hendriyansyah Juny Andry Sulistyo Muhammad Erland Farrel Muhammad Farid Muchyyidin Muhammad Mukmin Mustafiq Muhammad Rizal Ramli Naufal Rifqi Hanan Nazala Trisnadyani Nur Mukti Afiatillah Selvia Agustina Soedarsono Soedarsono Soma Shaki Hadi Nugraha