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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur BANGUN REKAPRIMA Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS)
Mahbub, Jamal
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Humanities Civil Engineering, Building, Construction & Architecture Education Engineering Social Sciences Other

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STUDI EKSPERIMEN KUAT LEKAT LEM PADA PASANGAN BETON RINGAN: STUDI EKSPERIMEN KUAT LEKAT LEM PADA PASANGAN BETON RINGAN Wiguna, Edo; Mahbub, Jamal; Lestari, Nor Puji; Setiawan, Adi; Larassati, Dian Sukma
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6799

Abstract

In modern construction, lightweight bricks are increasingly used as an alternative building material due to their advantages in terms of light weight, ease of installation, and energy efficiency. However, the strength of structures formed from lightweight brick masonry is highly dependent on the quality of the bond between the elements, particularly the use of adhesives such as construction glue. One crucial factor determining the bond strength is the configuration and length of the bonding surface used. This study aims to evaluate the effect of the number of bonding rows on the adhesive bond strength of lightweight brick masonry. Testing was conducted experimentally using one- and two-row bonding configurations. Each sample was subjected to compressive force through a 24.4 mm diameter cylindrical press. Results showed that the two-row configuration produced a higher bond strength, but with a larger coefficient of variation, indicating lower stability of the results. Increasing the bond length actually tended to decrease the bond strength, likely due to uneven distribution of glue and pressure. Furthermore, all test specimens fractured in the brick body, not at the bonding surface, indicating that the adhesive strength had exceeded the tensile strength of the lightweight brick. Regression analysis showed a very strong relationship between compressive force and bond strength, indicating that applied pressure was the dominant factor in bond effectiveness.
PENINGKATAN KOMPETENSI TENTANG UJI KAPASITAS DUKUNG TANAH DI LAPANGAN UNTUK SISWA SMK NEGERI PRINGSURAT : PENINGKATAN KOMPETENSI TENTANG UJI KAPASITAS DUKUNG TANAH DI LAPANGAN UNTUK SISWA SMK NEGERI PRINGSURAT Rabinah, Aiun Hayatu; Harprastanti, Primasiwi; Mahbub, Jamal; Goro, Garup Lambang; Risman; Warsiti; Mulyono, Tedjo; Nurhadi, Imam; Himam, Muhamad Khudza Alfi; Imansyah, Salmaa R. N
Bangun Rekaprima Vol. 12 No. 1 (2026): April 2026
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v12i1.7636

Abstract

One of the challenges faced by students from SMKN Pringsurat in the civil construction implementation survey was related to field soil testing. Generally, SMKN Pringsurat students already have a basic understanding of civil engineering competencies, but still experience difficulties in several areas, particularly field soil testing. Therefore, to improve competency, training was conducted on the application of concrete testing in the field. The training focused on soil bearing capacity testing for SMKN Pringsurat. Based on questionnaire results, after the training, an average of >60% of SMKN Pringsurat students were able to correctly understand and understand the soil testing procedure in the field using the DCP tool, as well as how to analyze the test data. Direct training and intensive mentoring were effective methods, making it easier for students to absorb the material. 70% of students stated that the training was easy to understand.
Integrated Infiltration Runoff Drainage Assessment for Urban Pluvial Flooding at a Campus Scale in a Tropical Environment Rabinah, Aiun Hayatu; Suparman, Suparman; Mahbub, Jamal; Parhadi, Parhadi; Larassati, Dian Sukma; Sulistiawati, Baiq Heny; Kusdiyanto, Rizky Aji
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 22 No. 1 (2026): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v22i1.96113

Abstract

Urban pluvial flooding frequently occurs in semi-urban tropical environments where intense rainfall exceeds local infiltration and drainage capacity. This study presents an integrated infiltration runoff drainage assessment at the campus scale to evaluate surface water inundation risk at Politeknik Negeri Semarang, Indonesia. Soil physical and hydraulic properties were characterized through laboratory testing, and infiltration behavior was simulated using the physically based Green–Ampt model under 2, 5, 10, and 20-year return period rainfall. Runoff was estimated using the Rational Method based on rainfall intensity corresponding to the time of concentration, while drainage storage capacity was quantified through field-based geometric measurements. The results indicate that the site is dominated by fine-grained soils (OH/MH; A-7-5) with very low saturated hydraulic conductivity (4.209 × 10⁻⁶ mm/s), limiting infiltration effectiveness to the early stage of rainfall. Infiltration rates rapidly decline toward saturated conductivity values, causing increasing rainfall increments to be converted directly into surface runoff. Estimated runoff volumes increase from 341.308 m³ (2-year) to 527.498 m³ (20-year return period). Although total drainage storage capacity (1270.38 m³) exceeds runoff volume, the storage margin decreases significantly under higher return periods, indicating increasing susceptibility to drainage surcharge. The integrated framework provides a process-based explanation of pluvial flooding driven by limited infiltration and drainage capacity utilization in tropical campus environments.
Co-Authors Aiun Hayatu Rabinah Ariyanto, Arief Subakti Buana, Lalu Yahya Surya Fachry Abda El Rahman Goro, Garup Lambang Harprastanti, Primasiwi Himam, Muhamad Khudza Alfi Imansyah, Salmaa R. N Isnubroto, Danang Iye, Risman Kusdiyanto, Rizky Aji Larassati, Dian Sukma Lestari, Nor Puji Lilik Satriyadi, Lilik Martono Martono Mulyono, Tedjo Nurhadi, Imam Pangesti, Rendy Dwi Parhadi Parhadi, Parhadi Risman Risman Roselina Rahmawati Sulistiawati, Baiq Heny Suparman Suparman Supriyadi Supriyadi Wahjoedi Wahjoedi Wahyono, Herry Ludiro Warsiti Warsiti Warsiti Wiguna, Edo Yustinus Eka Wiyana, Yustinus Eka