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All Journal Jurnal Ilmiah Desain & Konstruksi ENGINEERING U Karst Jurnal Riset Rekayasa Sipil Jurnal Manajemen Teknologi dan Teknik Sipil (JURMATEKS) Community Development Journal: Jurnal Pengabdian Masyarakat Journal Innovation of Civil Engineering (JICE) Engineering and Technology International Journal (EATIJ) Journal of Civil Engineering and Vocational Education
Imam Mustofa
Civil Engineering, Universitas Kadiri, Kediri, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Public Health Transportation

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Efficiency Analysis of Open Polygon Method in Land Mapping in Mojoroto Kediri Nurcahyono, Nurcahyono; Mustofa, Imam; Fatima, Brenda; Pratama, Satrya Adi; Setyoningrum, Tyas Dwi; Salsabila, Fitri Amalia; Putri, Karisma
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.618

Abstract

In the building establishment process, the geotechnical characteristics of soil have a significant impact on the structural performance of buildings. Therefore, soil mapping becomes a critical step in understanding the properties of soil that can affect foundation and structural stability. The mapping method used is open polygon mapping, which allows flexibility in determining land boundaries. Measurements were taken at three survey points: roadside, middle of the field, and edge of the field. The mapping results reveal variations in soil characteristics that need to be considered in development planning to ensure solid and stable building foundations. The implementation of Geographic Information Systems (GIS) in this process facilitates deeper data analysis and better visualization of field conditions. The mapping results show significant variations in ground elevation at each survey point, emphasizing the importance of understanding the area's topography. Additionally, area measurements were conducted using open polygon data, providing fundamental information for area development planning. Contour maps generated through Surfer software provide clear visualization of ground elevations at each survey point, enhancing understanding of the area's topography. This research contributes significantly to understanding soil characteristics and topography in the rear area of Mojoroto. It is expected to serve as a guide for area development planning, ensuring the stability and safety of future building structures. Thus, soil mapping is a critical step in ensuring the safety and sustainability of future buildings and contributes to sustainable area development planning.
Efficiency Analysis of Open Polygon Method in Land Mapping in Mojoroto Kediri Nurcahyono, Nurcahyono; Mustofa, Imam; Fatima, Brenda; Pratama, Satrya Adi; Setyoningrum, Tyas Dwi; Salsabila, Fitri Amalia; Putri, Karisma
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.618

Abstract

In the building establishment process, the geotechnical characteristics of soil have a significant impact on the structural performance of buildings. Therefore, soil mapping becomes a critical step in understanding the properties of soil that can affect foundation and structural stability. The mapping method used is open polygon mapping, which allows flexibility in determining land boundaries. Measurements were taken at three survey points: roadside, middle of the field, and edge of the field. The mapping results reveal variations in soil characteristics that need to be considered in development planning to ensure solid and stable building foundations. The implementation of Geographic Information Systems (GIS) in this process facilitates deeper data analysis and better visualization of field conditions. The mapping results show significant variations in ground elevation at each survey point, emphasizing the importance of understanding the area's topography. Additionally, area measurements were conducted using open polygon data, providing fundamental information for area development planning. Contour maps generated through Surfer software provide clear visualization of ground elevations at each survey point, enhancing understanding of the area's topography. This research contributes significantly to understanding soil characteristics and topography in the rear area of Mojoroto. It is expected to serve as a guide for area development planning, ensuring the stability and safety of future building structures. Thus, soil mapping is a critical step in ensuring the safety and sustainability of future buildings and contributes to sustainable area development planning.
Utilization of Open Polygon Method for Land Mapping in Mojoroto Kediri with Geospatial Approach Permana, Ricky Eka Satria Agung; Mustofa, Imam; Aprillinda, Ismatul Putri; Purwanto, Zahra; Muhdhor, Muhammad Ali; Chaq, Uluumul; Ramadhani, Fadlila Ayub; Wicaksono, Daniel Jalu Aufarel
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.619

Abstract

Land mapping is an important research activity to determine the location of points on the earth's surface, describing the physical condition of parts of the surface that resemble the actual condition. The objective of this process is to gain a comprehensive understanding of the land to be built and used through land area measurements, topographic maps, and land volume analysis at various altitudes. In this mapping, the open polygon method is used for calculations which are conventional methods using data point values as data centers to represent the area of influence. During this mapping, there are three main points used with the open polygon method. A total of 26 ground contours were recorded, and 4 road contours recorded. During the mapping process, corrections are required on the open polygon calculations to ensure the accuracy of the results. This correction involves adjusting the data to take into account field variability and inaccuracies of measuring instruments, so that the resulting data can be reliable for further analysis and correct decision-making. The land that has been painted can be used for various fields such as construction, and mining. Land mapping allows partial surface physical state imaging, classification of land, and can be used to plan, build, and maintain infrastructure such as highways and bridges. The result of this practice obtained data of the maximum height of 90,0945 masl and minimum 88,76 masl with the average ground height 90,05059 masl, while the average highway height is at 88,86175 masl.
Utilization of Open Polygon Method for Land Mapping in Mojoroto Kediri with Geospatial Approach Permana, Ricky Eka Satria Agung; Mustofa, Imam; Aprillinda, Ismatul Putri; Purwanto, Zahra; Muhdhor, Muhammad Ali; Chaq, Uluumul; Ramadhani, Fadlila Ayub; Wicaksono, Daniel Jalu Aufarel
CIVED Vol. 11 No. 3 (2024): September 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i3.619

Abstract

Land mapping is an important research activity to determine the location of points on the earth's surface, describing the physical condition of parts of the surface that resemble the actual condition. The objective of this process is to gain a comprehensive understanding of the land to be built and used through land area measurements, topographic maps, and land volume analysis at various altitudes. In this mapping, the open polygon method is used for calculations which are conventional methods using data point values as data centers to represent the area of influence. During this mapping, there are three main points used with the open polygon method. A total of 26 ground contours were recorded, and 4 road contours recorded. During the mapping process, corrections are required on the open polygon calculations to ensure the accuracy of the results. This correction involves adjusting the data to take into account field variability and inaccuracies of measuring instruments, so that the resulting data can be reliable for further analysis and correct decision-making. The land that has been painted can be used for various fields such as construction, and mining. Land mapping allows partial surface physical state imaging, classification of land, and can be used to plan, build, and maintain infrastructure such as highways and bridges. The result of this practice obtained data of the maximum height of 90,0945 masl and minimum 88,76 masl with the average ground height 90,05059 masl, while the average highway height is at 88,86175 masl.
Retaining Wall Innovation of Stone and Reinforced Concrete to Stand Guard Against Landslides and Earthquakes Cahyono, Heru Setiyo; Arifin, Achmad Saiful; Ingsih, Ita Suhermin; Saefudin, Ruli; Mustofa, Imam
Journal Innovation of Civil Engineering (JICE) Vol 6 No 1 (2025)
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jice.v6i1.23487

Abstract

In the landslide–prone terrains of Puri District, East Java, engineers have crafted a groundbreaking solution to a life–threatening problem: a hybrid retaining wall that fuses traditional batu kali masonry with reinforced concrete, designed to outlast both relentless soil creep and violent earthquakes. Standing 4.25 meters tall and stretching 20 meters across a fragile slope, this structure—embedded 1.5 meters into the earth—defies seismic forces amplified by climate change, withstanding horizontal accelerations of 0.19g and shear forces that spike 388% during quakes. Rigorous analysis reveals its secret: D16 steel bars, spaced as tight as 100 mm at stress hotspots, work in concert with locally quarried stone to balance cost and resilience. The wall’s success lies in numbers—sliding safety factors of 4.02 (normal) and 1.78 (seismic), bearing pressures grazing 99.9% of limits without failure—but its true victory is human. Shielding a riverside community from catastrophic landslides, it ensures roads stay open, homes remain intact, and daily life flows uninterrupted. As Indonesia battles rising rainfall and tectonic unrest, this innovation offers a replicable blueprint: marrying ancestral building wisdom with 21st–century engineering to turn vulnerability into durability. Keywords: Retaining Wall; Seismic Condition; Landslide Mitigation; Masonry Structure; Sustainable Infrastructure.
SOSIALISASI PENERAPAN TEKNOLOGI BIM SEBAGAI SOLUSI EFISIENSI MATERIAL TULANGAN DI TULUNGAGUNG Arifin, Achmad Saiful; Mustofa, Imam; Azhari, Faiz Muhammad
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 6 No. 3 (2025): Volume 6 No 3 Tahun 2025
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v6i3.48733

Abstract

Transformasi digital dalam industri konstruksi menuntut peningkatan efisiensi dan akurasi, terutama dalam pengelolaan material seperti besi tulangan yang memiliki kontribusi besar terhadap struktur dan biaya proyek. Building Information Modelling (BIM) hadir sebagai solusi inovatif untuk menjawab tantangan ini. Namun, adopsi BIM dalam proyek skala kecil-menengah, khususnya di daerah seperti Tulungagung, masih sangat terbatas. Kegiatan pengabdian ini bertujuan untuk mensosialisasikan dan melatih penggunaan teknologi BIM kepada pelaku konstruksi lokal, dengan fokus pada perencanaan kebutuhan tulangan besi untuk membangun kolom dan balok. Pelatihan ini melibatkan pemodelan struktur 3D menggunakan Autodesk Revit serta penerapan metode Bar Bending Schedule (BBS) untuk menghitung volume, waktu, dan efisiensi material. Hasil ini BIM mampu mengurangi potensi pemborosan besi tulangan sebesar 18,7% dan memangkas perkiraan waktu dari 9 jam menjadi 3 jam. Selain peningkatan akurasi perencanaan, peserta menunjukkan antusiasme yang tinggi untuk menerapkan BIM dalam proyeknya. Temuan ini membuktikan bahwa pelatihan BIM berbasis studi kasus lokal efektif dalam meningkatkan efisiensi proyek dan kapasitas sumber daya manusia di wilayah tersebut. Replikasi kegiatan dan dukungan infrastruktur digital direkomendasikan untuk memperluas dampak positif teknologi BIM di sektor konstruksi nasional. Kegiatan ini berdampak positif dalam membangun kesadaran akan pentingnya digitalisasi perencanaan konstruksi dan membuka peluang untuk adopsi BIM yang lebih luas di tingkat lokal. Disarankan agar ada dukungan lebih lanjut berupa pelatihan tingkat menengah dan penyediaan akses perangkat lunak BIM sehingga dampak dari kegiatan tersebut dapat berkelanjutan.
Consistency of Compressive Strength in Concrete with 10% Rice Husk Ash Substitution Alfaridh Pasya, Salman; Bima Mahardana, Zendy; Mustofa, Imam; Iwan Candra, Agata
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6583

Abstract

Using rice husk ash (RHA) in concrete technology represents a significant innovation in promoting sustainability. The pozzolanic properties of RHA enhance concrete quality through microstructural refinement while mitigating environmental impacts. However, replacing 10% of cement with RHA has inconsistent effects on compressive strength. Such variability may limit the broader application of RHA in structural concrete due to uncertainties in performance prediction, quality assurance, and design safety. While some studies report strength improvements, others note reductions often attributed to limited samples size, material inconsistencies, and variations in mixing or curing processes. This study aims to statistically validate the consistency of compressive strength in concrete with 10% RHA substitution by increasing the sample size and controlling key variables. Nine specimens per test condition were evaluated using a water-cement ratio of 0.53, submersion curing and ASTM C39 testing standards. Compressive strength assessment was conducted at 7 days. The result show a 7.54% increase in compressive strength, from 22.71 MPa to 24.42 MPa, with a coefficient of variation (CV) of 2.26%, well below the 10% threshold. In contrast, earlier studies with smaller sample sizes reported CVs as high as 42.65%, indicating greater statistical variability. This improvement is attributed to the increased sample size, material quality control, and uniform mixing, which ensured homogeneous RHA distribution and optimized pozzolanic reactions. By applying a controlled-variable approach and increasing the sample size, this study addresses prior inconsistencies and reinforces the validity of RHA as a viable cement substitute in concrete.
Statistical Validation of 2% Lignosulfonate as a Sustainable Stabilizer for Expansive Clay Rivianto, Arif; Candra, Agata Iwan; Nursandah, Fauzie; Mustofa, Imam
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6594

Abstract

Expansive clay soils undergo volumetric changes due to fluctuations in moisture content, which can cause structural damage to foundations, pavements, and embankments. Traditional stabilization methods, such as cement and lime, are effective but have a significant environmental impact, highlighting the need for more environmentally friendly alternatives. Lignosulfonate (LS), an organic stabilizer derived from industrial by-products, offers a more sustainable approach to improving soil strength and stability. This study evaluates the effect of 2% lignosulfonate on the unconfined compressive strength (UCS) of expansive clays. The research method involved mixing LS at 2% of the dry weight of the soil into the expansive clay (CL-ML) and conducting UCS tests on three untreated (control) samples and six treated samples. Statistical analysis was used to assess the significance of the differences between the two groups. Results show that the UCS increased from 236.29 kPa in the control group to 291.49 kPa in the treated group, reflecting a 23.37% improvement. Poisson's ratio decreased from 0.300 to 0.200, indicating reduced lateral deformation and enhanced soil stiffness, which improves the bearing capacity and stability of structures built on it. The UCS values ​​were observed to be consistent supported by low standard deviation. The study highlights the critical role of adequate sample replication and control over operational variables such as moisture content, compaction, and LS dispersion to ensure reliable and reproducible stabilization outcomes. This study strengthens the empirical basis for the application of LS as a sustainable and environmentally friendly stabilizer for expansive clays.
Co-Authors Abdul Rosid Ma'ruf Achmad Fikri Haikal Achmad Khabib Kurnia Agata Iwan Candra Ahmad Ridwan Alfaridh Pasya, Salman Andri Dwi Cahyono Aprillinda, Ismatul Putri Arifin, Achmad Saiful Ashabul Yamin Audy Yoga Pratama Bima Mahardana, Zendy Chaq, Uluumul Dwi Nur Khayatin Edy Gardjito, Edy Erwin Dwi Laksana Evita Fitrianis Hidiyati Faiz Muhamad azhari Faiz Muhammad Azhari Faiz Muhammad Azhari Fatima, Brenda Fitry Rahmawaty Heru Setiyo Cahyono Ines Indria Wati Ita Suhermin Ingsih Muhammad Heri Nastotok Muhdhor, Muhammad Ali Nursandah, Fauzie Pratama, Satrya Adi Purwanto, Zahra Putri, Karisma Rahmahima, Bella Amiria Ramadhani, Fadlila Ayub Rendy Kurnia Dewanta Ricco Dwi Yuliawan Rivianto, Arif Saefudin, Ruli Salsabila, Fitri Amalia Setyoningrum, Tyas Dwi Sigit Winarto Sigit Winarto Sony Susanto Suwarno Suwarno Tantra Tegar Permady Wicaksono, Daniel Jalu Aufarel Wiwit Mely Yanti Jannah