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Jurnal Pensil : Pendidikan Teknik Sipil
Published by Universitas Negeri Jakarta
ISSN : 23018437     EISSN : 26231085     DOI : https://doi.org/10.21009/PenSil
Core Subject : Education, Engineering,
Civil Engineering, Building, Construction & Architecture Education Other
In general, the Jurnal Pensil : Pendidikan Teknik Sipil accepts manuscripts with the themes: Education Strategy and Management, Industrial Relations, and Civil and Structural Engineering. Jurnal Pensil : Pendidikan Teknik Sipil is intended for all academics in Civil Engineering Vocational Education. The presence of the Jurnal Pensil : Pendidikan Teknik Sipil is expected to contribute to the scientific development of educational and vocational technology in civil engineering. The scope of the Jurnal Pensil : Pendidikan Teknik Sipil includes the results of quantitative, qualitative research, experiments, surveys, development, competence, construction management, and scientific studies in the form of literature studies that aim to improve quality and build innovation in technological and vocational education in the field of Civil Engineering. The focus in the Pencil Journal includes: Media and Civil Engineering Learning Materials Civil Engineering Curriculum and Learning Methods Civil Engineering Education and Training Management Civil Engineering Learning Strategies Civil Engineering Education Financing Competence and Work in the Civil Engineering Sector, and Development of Civil Engineering Education and Training
Arjuna Subject : Ilmu Sosial - Pendidikan
Articles 324 Documents
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THE EFFECT OF SUPERPLASTICIZER AND ACCELERATOR ON THE EARLY-AGE PERFORMANCE OF FAST TRACK CONCRETE CONTAINING RICE HUSK ASH F. Eddy Poerwodihardjo; Dadi Tri Awan Selalatu
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.64556

Abstract

The utilization of high-performance fast-track concrete has become an important solution for improving efficiency and accelerating construction schedules in modern infrastructure projects. This study aimed to determine the optimum combination of Rice Husk Ash (RHA) as a pozzolanic material with the addition of a superplasticizer (Viscocrete 1050 HE) and an accelerator (Sika Rapid 505) in high-strength concrete targeting a compressive strength of 60 MPa. Cement was partially substituted with RHA at variations of 0%, 5%, 10%, and 15% by weight of the total binder. The evaluation included workability and hardened concrete properties, namely compressive, flexural, and splitting tensile strengths, tested at curing ages of 1, 2, 3, and 28 days. The results showed that increasing the RHA content beyond 5% reduced workability due to the high specific surface area of RHA particles. At 1 day, the cement dilution effect reduced compressive strength from 30.3 MPa in the control mix to 25.3 MPa at 15% RHA substitution. However, the use of Sika Rapid 505 successfully mitigated this reduction and maintained early-strength development. At 28 days, the optimum performance was achieved with 5% RHA substitution, producing a compressive strength of 52.2 MPa and a flexural strength of 7.1 MPa, while the highest splitting tensile strength of 4.3 MPa was obtained at 10% RHA. Overall, the combination of 5% RHA, Viscocrete 1050 HE, and Sika Rapid 505 demonstrated the best synergistic performance in maintaining fresh concrete properties and enhancing the mechanical performance of high-strength fast-track concrete.
ANALYSIS OF THE EFFECT OF FOUNDATION DIMENSIONS ON THE BEARING CAPACITY AND SETTLEMENT OF PILE FOUNDATIONS FOR THE WTP SPAM KOBEMA BENGKULU BUILDING Nurhaliza; Raihanah Naura Jinan; Rena Misliniyati; Hardiansyah; Muharram Nur Fikri; Khairul Amri
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.65067

Abstract

The Water Treatment Plant (WTP) in the Benteng Kobema Bengkulu Regional Drinking Water Supply System (SPAM), with a capacity of 380 Litres per Second, plays a crucial role in providing clean water to the community. This study aims to analyse the influence of dimensional variations on the bearing capacity and foundation settlement of the WTP building using the Poulos and Davis method, the Reese and Wright method, the Luciano Decourt method, and the finite element method. Based on the results of the Standard Penetration Test (SPT), the influence of variations in shape, namely square with dimensions of 300 mm, 400 mm, and 500 mm, as well as depths of 7m, 9m, 11m, and 13m, affects the bearing capacity and foundation settlement This analysis compares the results of bearing capacity calculations and pile foundation settlement in WTP buildings using several different methods. The analysis results show that the bearing capacity, deflection magnitude, and smallest settlement are below the permitted settlement limit, i.e., less than 10% of the foundation dimensions. The comparison between static and numerical methods, or the Bearing Capacity Ratio (BCR) approaching 1, is more efficient and safer. In this analysis, the BCR value closest to 1 was obtained for a 500 mm foundation using the Reese and Wright method at a depth of 9 m, yielding a bearing capacity of 312.04 tonnes for a single pile and 207.69 tonnes for a pile group.
EXPERIMENTAL INVESTIGATION OF FLEXURAL AND CRACKING BEHAVIOR OF POLYPROPYLENE FIBER REINFORCED LIGHTWEIGHT CONCRETE BEAMS I.G.A. Neny Purnawirati; Fajar Surya Herlambang
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.65864

Abstract

This study experimentally evaluates the effect of polypropylene fiberincorporation on the flexural performance and cracking behavior ofstructural lightweight concrete beams. The lightweight concrete wasproduced using locally available lightweight aggregates with a targetcompressive strength of 25 MPa and a water-cement ratio of 0.41.Polypropylene fibers were added at a dosage of 0.45% by volume ofconcrete. The experimental program included compressive strength,splitting tensile strength, flexural strength, and crack width tests. A totalof 10 cylindrical specimens and 6 reinforced lightweight concrete beamspecimens measuring 200 × 300 × 1800 mm were prepared and tested.All specimens were water-cured for 28 days before testing. The resultsshowed that polypropylene fibers improved the mechanical and crackingperformance of structural lightweight concrete. The compressivestrength increased from 23.73 MPa to 24.81 MPa, while the splittingtensile strength increased from 2.09 MPa to 2.31 MPa. In addition, theflexural strength increased from 3.28 MPa to 3.51 MPa. The addition ofpolypropylene fibers also reduced the maximum crack width from 0.75mm to 0.47 mm and produced narrower and more uniformly distributedcracks along the beam span, indicating improved crack resistance andpost-cracking behavior. The novelty of this study lies in the experimentalinvestigation of crack propagation and flexural behavior of structurallightweight concrete beams incorporating polypropylene fibers usinglocally sourced lightweight aggregates under three-point loadingconditions.
EVALUATION OF THE CORRELATION BETWEEN CONE RESISTANCE VALUES (qc) AND N-SPT VALUE USING STATISTICAL METHODS IN COASTAL AREAS AROUND THE SEI PERCUT RIVER, NORTH SUMATRA Bayu Wintoro; Amirah Zakiyyah; Anna Dewi
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.65872

Abstract

When designing the substructure of a building or infrastructure, it is essential to use soil parameters obtained from both laboratory and field investigations. These parameters help assess actual ground conditions and estimate reliable bearing capacity on-site. Two common field tests used for this purpose are the Cone Penetration Test (CPT) and the Standard Penetration Test (SPT). This study explores the correlation between the results of these two methods, aiming to achieve more efficient and cost-effective soil analysis. The analysis draws on data from a total of 16 points of field investigation—8 from SPT and 8 from CPT—conducted across the research area. The statistical testing show that both the correlation coefficient (R) and the coefficient of determination (R²) are close to 1, indicating a strong relationship. Specifically, the linear model produced values of 0.931 for R and 0.866 for R²; the quadratic model yielded 0.932 and 0.868; and the cubic model gave 0.950 for R and 0.903 for R². The t-test results also indicate that the N-SPT is statistically significant influence on the qc across all models. The derived correlation equations between N-SPT and qc are as follows: Linear model: N-SPT = 0.208 qc + 1.004, Quadratic model: N-SPT = 0.0002 qc² + 0.1859 qc + 1.205, and Cubic model: N-SPT = 0.00001 qc³ - 0.036 qc² + 0.4018 qc + 0.1323.
REVITALISASI PARIWISATA HERITAGE DAN KUALITAS UDARA PERKOTAAN: EVALUASI TRADE-OFF LINGKUNGAN DI KAWASAN PERKOTAAN Andri Wibowo
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66201

Abstract

Urban heritage revitalization has increasingly been adopted as a strategy to stimulate economic growth and enhance city attractiveness through tourism development. However, such functional transformations may also generate environmental pressures, particularly on urban air quality, creating potential trade-offs between economic benefits and environmental sustainability. This study aims to assess the impact of heritage tourism revitalization on air pollutant concentrations and to identify the key factors contributing to air quality degradation in urban districts. A mixed-methods case study was conducted through indoor–outdoor air quality measurements, field observations, interviews, and documentation in the Kayutangan heritage corridor, Malang City, Indonesia, serving as an empirical setting. Data were analyzed using the Miles–Huberman model and Greenship Existing Building version 1.1 parameters focusing on Indoor Health and Comfort. The results indicate that increased traffic density, tourist activity, and commercial operations significantly elevated CO₂, TVOC, and formaldehyde concentrations, with several measurements exceeding recommended health standards. These findings demonstrate the environmental trade-offs associated with heritage tourism revitalization and highlight the need for integrated transportation management, emission control, and continuous air quality monitoring to ensure sustainable urban development.
ANALISIS SPASIAL SIGNIFIKAN HUBUNGAN VOLUME DENGAN KECEPATAN KENDARAAN PADA SIMPANG BERSINYAL Evita Fitrianis Hidiyati; Andri Dwi Cahyono; Mochammad Danara Indra Pradigta; Faiz Muhammad Azhari; Nandana Faizal Bahtiar; Moh Ali Maftuh
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66212

Abstract

In Kediri City, Indonesia this study examines the spatial variations in the correlation between vehicle speed and traffic volume at signalized junctions. Field surveys were conducted during peak-hour periods at eight signalized intersections, with 30 directional approaches used as observation units. The analysis considered four vehicle categories: motorcycles, passenger cars, trucks, and buses. Geographically Weighted Regression (GWR) was utilized to investigate local variation in volume-speed sensiticity, whereas Ordinary Least Squares (OLS) regression served as a global reference model. The results show that higher traffic volume is generally associated with lower vehicle speed, but the strength of this relationship differs by location and vehicle type. Motorcycles have the weakest sensitivity because of their greater maneuverability in mixed traffic. In contrast, trucks and buses show stronger speed reductions due to larger vehicle dimensions, lower acceleration capability, and greater maneuvering-space requirements. Spatially, Alun-Alun and Kemuning intersections show stronger local volume–speed relationships, as indicated by more negative local coefficients and higher Local R² values. The ANOVA-based comparison indicates that GWR provides different levels of improvement over the global model, particularly for heavy vehicles. These findings support the need for signalized intersection management that considers both local traffic conditions and vehicle-type characteristics.
COMPARATIVE EFFECTS OF CORN COB ASH AND SIWALAN FRUIT SHELL ASH AS FILLERS ON MARSHALL STABILITY AND FLOW OF POROUS ASPHALT MIXTURES Nurani Hartatik; Aditya Rizkiardi; I Gede Agus Punarta; Yudi D Prasetyo
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66278

Abstract

The application of porous asphalt mixtures has increased because oftheir ability to improve surface drainage and traffic safety. However,their open-graded structure often reduces mechanical stability, makingfiller selection important for mixture performance. This study comparescorn cob ash and siwalan fruit shell ash as agricultural waste-based fillerson Marshall stability, flow, volumetric characteristics, Cantabro Loss,Asphalt Flow Down, and optimum asphalt content (OAC) of porousasphalt mixtures. Both waste materials were processed into fine ashpassing the No. 200 sieve and used at a fixed filler content of 1%.Laboratory testing included material characterization, mixture design,Marshall testing, Cantabro Loss, and Asphalt Flow Down. The OAC wasdetermined using the Australian Asphalt Pavement Association (AAPA,2004) procedure based on Voids in Mix, Cantabro Loss, and AsphaltFlow Down criteria. The results showed that both mixtures achieved thehighest Marshall stability at 4% asphalt content, with 1334 kg for thesiwalan fruit shell ash mixture and 1330 kg for the corn cob ash mixture.Flow values ranged from 2 mm to 3 mm, indicating acceptabledeformation behavior. The final OAC was 5.00% for the siwalan fruitshell ash mixture and 4.59% for the corn cob ash mixture. These findingsindicate that corn cob ash requires lower asphalt binder demand, whilesiwalan fruit shell ash remains feasible but requires higher bindercontent. The novelty of this study lies in the direct comparativeevaluation of two locally available agricultural waste ashes as sustainablefiller materials in porous asphalt mixtures.
INFLUENCE OF IN-SITU CONCRETE AND REINFORCING STEEL PROPERTIES ON THE SERVICEABILITY PERFORMANCE OF REINFORCED CONCRETE FRAMES Pujo Priyono; Muhammad Haykal Fiendyo
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66577

Abstract

This study evaluates the influence of differences between the in-situ concrete and reinforcing steel properties and their design values on the performance of a reinforced concrete frame structure, assessed in terms of strength and serviceability. A case study was conducted on the ASN Ministry of Finance apartment building in Denpasar through field material testing, element capacity evaluation, and structural modeling using SAP2000. The installed concrete exhibited an average compressive strength of 24.5–25.2 MPa with a deviation of 1.0–1.3% from the design value, remaining within standard tolerances. The reinforcing steel showed a higher yield strength than specified, increasing beam flexural capacity by approximately 3.3%, while the axial capacity of columns decreased by an average of 4.6%. Nevertheless, the column-to-beam capacity ratio satisfied the Strong Column Weak Beam requirement (1.48–2.00). Structural response analysis indicated that interstory drift and P–Delta effects were below allowable limits, demonstrating adequate lateral stiffness and stability. Overall, controlled variations in material properties did not reduce global structural performance but affected the safety margin. The findings highlight the importance of material quality control in ensuring the reliability of earthquake-resistant structures.
COMPARATIVE ANALYSIS OF FLY ASH AND LIME ON THE COMPRESSIVE STRENGTH OF GEOPOLYMER MORTAR Regina Wita Pramesti; Tira Roesdiana
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66612

Abstract

This study aims to analyze the effect of the variation between fly ash and lime as binders on the compressive strength of geopolymer mortar at 7, 14, 21, and 28 days of testing. Using an experimental method with mortar cured at room temperature, this study produced 60 test specimens in the form of 5 cm × 5 cm × 5 cm cubes with a ratio of 2,5:1 sand to binder and using alkali activators NaOH and Na2SiO3 with ratio of 1:2,5. The results of this study prove at the maximum compressive strength was obtained at variation of 50% FA : 50% LM at a testing age of 28 days, amounting to 21.33 MPa. Conversely, the minimum compressive strength was obtained at a variation ratio of  0% FA : 100% LM, with a value af 7.33 MPa at testing age of 28 days. The use of 50% limestone can increase stable compressive strength.
STUDY ANALYSIS OF ALTERNATIVE STRENGTHENING METHODS FOR LONG-SPAN REINFORCED CONCRETE CANTILEVER BEAMS Ni Putu Silvi; I Putu Laintarawan; I Gusti Ngurah Eka Partama
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66641

Abstract

Reinforced concrete cantilever beams with long spans are prone to excessive deflection, which may adversely affect structural performance and safety. This study aims to analyze alternative strengthening methods for reinforced concrete cantilever beams in a villa building where the cantilever length was extended up to 3.65 m during the construction stage, resulting in deflections exceeding the allowable limits. The research employed a quantitative approach using three-dimensional structural modeling with ETABS software. Existing structural conditions were identified through non-destructive testing, including hammer tests and rebar scanning, to determine the residual concrete strength and reinforcement configuration. The analyzed strengthening measures constitute an integrated strengthening package consisting of first-floor column jacketing, the addition of second-floor columns, and the enlargement of second-floor cantilever beam dimensions as a unified structural system. Structural performance was evaluated in terms of deflection, bending moment, shear force, and axial force before and after strengthening. The analysis results indicate that prior to strengthening, the cantilever beam deflections did not satisfy the allowable deflection criteria. After strengthening, the deflections were significantly reduced by 22.8% at the roof level and 56.8% at the second-floor level, meeting the allowable deflection requirements. In addition, the internal force distribution improved and the supporting capacity of the structural elements increased. Therefore, the proposed strengthening alternatives are proven to be effective in enhancing the structural behavior of long-span cantilevered reinforced concrete beams.

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