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Hariyadi, Hariyadi
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Mataram
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Neuroscience Social Sciences Transportation

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The Use of Sea Sand as a Substitute for Fine Aggregate in High-Strength Concrete Nurul Hidayati; Hariyadi Hariyadi; Ahmad Zarkasi; Muhammad Holikul Bahari Kusuma
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8066

Abstract

Concrete is a common construction material whose quality depends on parameters such as compressive strength and split tensile strength. To reduce the environmental impact of river sand use, this study evaluates the use of sea sand as a partial replacement for fine Aggregate. Although sea sand contains salt, special treatment can reduce its salt content and is expected to improve the quality of high-grade concrete. The objectives of this study were to assess the impact of sea sand on the mechanical strength of concrete and to determine the optimum percentage of sea sand in high-quality concrete mixtures. This study used compressive strength, split tensile strength, and shear strength testing methods with variations in sea sand content in concrete mixtures of 0%, 25%, 50%, and 100%. The tests were conducted using a Compression Testing Machine (CTM). The results showed that using sea sand reduced the mechanical strength of concrete. Compressive strength decreased from 43.09 MPa to 29.91 MPa, splitting tensile strength decreased from 4.23 MPa to 1.21 MPa, and shear strength decreased from 10.23 MPa to 5.97 MPa with an increase in the percentage of sea sand. Therefore, it can be concluded that although sea sand can be used, its use in large quantities reduces the mechanical strength of concrete. The optimum percentage must be adjusted to balance sustainability and structural strength.
Analysis of Shear Wall Placement Configuration on Building Structure Behavior Nurul Hidayati; Ahmad Zarkasi; Hariyadi Hariyadi; Ranni Sahlinda
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 10, No 1 (2025): EDISI MARET 2025
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v10i1.6197

Abstract

Lombok Island is one of the earthquake-prone areas, located between two earthquake generators. Based on these conditions, it is expected that construction in earthquake-prone areas can meet the standards. Shear walls are one of the earthquake-resistant structural systems used to resist lateral forces. Three alternative shear wall shapes will be analyzed using the numerical method: the L, I, and T shapes. The types of loads to be analyzed are dead loads, live loads, and earthquakes. Drawing from the findings of the conducted analysis, it is discovered that the most effective shear wall position in resisting lateral forces is the shear wall located at the corner of the building, based on the values of the drift that occur in the x and y directions. In addition, increasing the number of shear walls can reduce the internal forces that structural components experience. The optimum drift value is obtained from alternative 1, the L-shaped shear wall (elbow), with a drift value of 0.000495 mm in the x direction and 0.000883 in the y direction.
Analisis Daya Dukung Fondasi Foot Plate Menggunakan Metode Meyerhof dan Terzaghi Studi Kasus RSJ Mutiara Sukma Sukma Dewi Rahmawati; Hariyadi Hariyadi; Hafiz Hamdani; Adriyan Fitrayudha
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1522

Abstract

A foundation is a structural element that transfers building loads to the soil layer, thereby ensuring the stability of the construction. The foot plate foundation is a type of shallow foundation commonly used for low- to medium-rise buildings. This study aims to analyze the bearing capacity of foot plate foundations using the Terzaghi and Meyerhof methods and to compare the calculation results from both methods within the context of the construction of the Drug Rehabilitation Building at Mutiara Sukma Psychiatric Hospital, Mataram City. The study employs a quantitative method with a comparative analysis approach. The data utilized consists of secondary data from Cone Penetration Tests (CPT/sondir) and foundation design drawings. The Meyerhof and Terzaghi methods yielded different bearing capacity values at each testing point; these differences are attributable to the specific equations, soil parameters, and correction factors employed. This study could not determine the most representative method, as no validation was performed using load tests or actual settlement data. Regarding the allowable bearing capacity of the shallow foundations, the values were obtained using the Terzaghi method: 20095,12 kN at point 1 (compared to 11641,73 kN via Meyerhof). At point S2, the values were 3,699.94 kN (Terzaghi) and 2,206.28 kN (Meyerhof); at point S3, they were 9,208.03 kN (Terzaghi) and 11,949.39 kN (Meyerhof); and finally, at point S4, the values were 8,395.88 kN (Terzaghi) and 5,051.14 kN (Meyerhof).
Desain Struktur Gedung Poltekes Mataram dengan Menggunakan Kolom Pipih Indrawan Indrawan; Hariyadi Hariyadi; Adryan Fitrayudha
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 3 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i3.5381

Abstract

The development of multi-story buildings requires structural systems capable of providing adequate strength, stiffness, stability, and spatial efficiency. One alternative is the use of flat columns as a substitute for conventional columns. This study aims to analyze the effect of flat columns on the structural performance of the Poltekkes Mataram Building through a structural redesign approach. The research employed a quantitative method using ETABS software to model and analyze two structural models: the existing structure with conventional columns and the redesigned structure with flat columns. Both models were designed with identical geometry, material properties, structural dimensions, and loading conditions. The evaluated parameters included axial force, column bending moment, beam internal forces, seismic base shear, and interstory drift. The results indicate that the use of flat columns increases the axial load capacity of columns, reduces column bending moments, and alters the distribution of internal forces in beams. In addition, the redesigned structure exhibits lower effective seismic weight and seismic base shear than the existing structure. The interstory drift values of both models satisfy the allowable limits, while the redesigned structure demonstrates smaller drift values. These findings indicate that flat columns can serve as a feasible alternative for improving structural efficiency while maintaining structural performance and safety against gravity and seismic loads.
Analisis Durabilitas Beton dengan Campuran Limbah Kaca terhadap Serangan Sulfat Siti Mustika Sari; Hariyadi Hariyadi; Maya Saridewi Pascanawaty; Adryan Fitrayudha
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1485

Abstract

The continuously increasing use of natural aggregates in concrete production drives the utilization of more environmentally friendly alternative materials, such as waste glass as a partial replacement for fine aggregates. This study aims to analyze the effect of using waste glass on concrete slump and compressive strength, and to compare concrete performance under normal water immersion and sulfuric acid solution immersion. An experimental approach was employed using waste glass variations of 0%, 10%, 20%, and 30% by weight of fine aggregates. Cylindrical specimens (10 cm in diameter and 20 cm in height) were immersed for 21 days in either normal water or a sulfuric acid solution (pH 4), followed by slump and compressive strength testing. The results showed slump values of 6 cm, 5 cm, 7.5 cm, and 7 cm for normal concrete and the 10%, 20%, and 30% waste glass variations, respectively. The highest compressive strength was achieved with the 10% waste glass variation: 27.76 MPa for normal water immersion and 24.27 MPa for sulfuric acid solution immersion. These values represent increases of 62.6% and 29.9%, respectively, compared to normal concrete. Compressive strength tended to decrease with 20% and 30% waste glass content, although the values remained higher than those of normal concrete. Thus, the 10% waste glass variation is the optimum choice for partially replacing fine aggregates, as it yielded the highest compressive strength under both immersion conditions.
Assessment of Building Damage Levels and Methods to Accelerate the Rehabilitation of Madrasah Schools in North Lombok Regency Faried Ma’ruf; Hariyadi Hariyadi; Buan Anshari
Eduvest - Journal of Universal Studies Vol. 6 No. 9 (2026): Eduvest - Journal of Universal Studies (Issue in Progres)
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i9.53376

Abstract

North Lombok Regency remains vulnerable to earthquakes, and damage to madrasah buildings continues to disrupt safe learning environments. This study aimed to assess the level of building damage and formulate priority strategies for accelerating madrasah rehabilitation in the region. A mixed-methods approach was applied to 12 madrasahs comprising 65 buildings. Data were collected through visual assessments of structural, architectural, and utility components based on Circular Letter No. 47/SE/DC/2020. The findings were analyzed using Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis, Internal Factor Analysis Summary (IFAS), External Factor Analysis Summary (EFAS), and the Analytic Network Process (ANP) using Super Decisions 2.10. The results showed that 42 buildings (64.62%) were slightly damaged, nine buildings (13.85%) were moderately damaged, and 14 buildings (21.54%) were severely damaged. IFAS and EFAS scores of 0.80 and 0.25, respectively, positioned the rehabilitation strategy in Quadrant I, indicating an aggressive strategic position. The ANP results ranked risk mitigation and prevention of structural failure as the leading strategy (14.87%), followed by industrialized earthquake-resistant construction using modular or prefabricated methods (13.34%). Kendall’s coefficient of concordance reached 1.00, indicating perfect agreement among experts. The study concluded that rehabilitation efforts should prioritize structural safety, earthquake resistance, and accelerated construction processes while supporting administrative efficiency, budget utilization, and cost-effective contracting strategies.
Co-Authors A Beriman Adryan Fitrayudha Ahmad Zarkasi Ahmad Zarkasi Ahyudanari, Ervina B Anshari Buan Anshari Ernadi Zamzami Faried Ma’ruf Fathmah - Mahmud Hafiz Hamdani Hartana Hasyim, Hasyim I Nyoman Merdana Iik Radevi Burhamsi Putri Indah Aulia Rizkika Indrawan Indrawan J Fajrin Jauhar Fajrin Karyawan, I Dewa Made Alit M. Heru Maya Saridewi Pascanawaty Maya Saridewi Pascanawaty Muhammad Holikul Bahari Kusuma Nadella Marchelina Ngudiyono Ngudiyono Ni Nyoman Kencanawati Ni Nyoman Kencanawati Nurul Hidayati Ranni Sahlinda Ratna Yuniarti Siti Mustika Sari Sukma Dewi Rahmawati Teti Handayani