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All Journal Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) Hexatech: Jurnal Ilmiah Teknik Research Horizon Bisma : Business and Management Journal Journal of Civil Engineering and Vocational Education
Junaidi, Imam
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Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Transportation

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Effectiveness of Rice Husk Ash and Glass Powder Waste as Partial Replacements of Cement in Concrete Construction Pranadiarso, Tedy; Junaidi, Imam; Prasetyo, Slamet Rohadi Budi; Putra, Adinata Laksana
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.v11i3.625

Abstract

The environmental impact of cement production has drawn attention to the use of glass waste and rice husk as a partial replacement for cement in concrete. According to research, the compressive strength of concrete containing GPW and RHA can increase up to 15-20%, after which it begins to decline. The objective of this study was to analyze the effectiveness of partial replacement of cement with GPW and RHA. Some of the factors considered in this study were compressive strength and specific gravity. The proportions of GPW and RHA used were 0%, 3%, 5%, 10%, 15%. Then concrete testing was done after 7 and 28 day. The maximum 28-day concrete compressive strength result for the addition of GPW and RHA at 5% mix proportion was 33.1 Mpa. The more the proportion of GPW and RHA mixture, the more the relative specific gravity of concrete decreases. Overall, this study found that the use of GPW and RHA in concrete had a significant effect on compressive strength and specific gravity. But do not forget to pay attention to how much GPW and RHA mix needs and the quality of concrete to be achieved.
Potensi Bisnis Fabrikasi Tulangan Pondasi Telapak Prasetyo, Slamet R.B.; A.S., Rohmahillah; Junaidi, Imam; Pranadiarso, Tedy
BISMA : Business and Management Journal Vol. 3 No. 2 (2025): Bisma : Business and Management Journal
Publisher : CV. Kalimasada Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59966/bisma.v3i2.1823

Abstract

The foundation reinforcement of footings is an important element in building construction that functions to transfer structural loads directly to the ground. This type of foundation is often used in buildings of less than 3 stories. The provision of this foundation can be carried out conventionally in the field using manual labor or by purchasing prefabricated products that have been processed off-site. This research aims to analyze the business potential of prefabricated footing reinforcement by comparing the time and cost efficiency between these two methods. The research methodology uses a case study approach on a residential construction project in the Jubung Area of Jember Regency by calculating work duration, labor requirements, and total material and labor costs for both scenarios. The analysis results show that off-site rebar fabrication generally offers significant time efficiency and potential cost savings, especially for medium to large-scale projects. Additionally, fabrication provides the advantage of more uniform work quality and minimizes the risk of errors in the field. Based on these findings, the foundation rebar fabrication business has good prospects in supporting the needs of modern construction projects that demand speed and cost efficiency.
Green Concrete: Pemanfaatan Sampah Non Organik Tutup Botol “Kempyeng” Dan Serbuk Kaca Sebagai Material Susbtitusi Parsial Beton Pranadiarso, Tedy; Junaidi, Imam; Ngibadah, Irsyadul
Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) Vol 13 No 1 (2025): Jurnal Ilmiah MITSU
Publisher : Fakultas Teknik, Universitas Wiraraja

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24929/ft.v13i1.4047

Abstract

The construction industry in Indonesia continues to grow. Additionally, data from the Ministry of Environment shows that the amount of non-organic waste accumulated over the four years from 2020 to 2023 has also increased. The innovation in this study is the use of non-organic waste from ‘Kempyeng’ bottle caps and glass as a solution for environmentally friendly concrete (Green Concrete). This study aims to identification the optimal composition and analize percentage influence on compressive strength and bulk density from the use of non-organic waste bottle caps ‘Kempyeng’ and glass powder as partial substitutes for cement and gravel. The study used bottle cap ‘Kempyeng’ compositions of 0%, 2%, 4%, 5%, and 7%. Meanwhile, the glass powder mixture composition was 0%, 5%, and 8%. Laboratory test results showed the optimal composition for partial substitution of cement and gravel was 5% glass and 4% kempyeng, with concrete compressive strength at 28 days of 26.92 MPa and bulk density of 2360.7 kg/m³. This proportion also increased the compressive strength by 6.65% and reduced the bulk density by 0.82% compared to normal concrete. With these results, glass powder and ‘Kempyeng’ bottle caps can be used as partial substitutes for cement and gravel in concrete mixtures.
Analisa kohesi semu pada tanah retak dengan alat uji geser yang dimodifikasi Prasetyo, Slamet R.B.; Junaidi, Imam; Subchan, Bagas R.; Yanuar, Setyo Ferdi
Hexatech: Jurnal Ilmiah Teknik Vol. 4 No. 2 (2025): Hexatech: Jurnal Ilmiah Teknik
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/hexatech.v4i2.1651

Abstract

Kohesi merupakan parameter penting dalam mengevaluasi kekuatan geser tanah, namun pada tanah retak, kohesi yang terbentuk bersifat semu dan tidak permanen. Penelitian ini bertujuan untuk menganalisis kohesi semu pada tanah retak menggunakan alat uji geser langsung yang dimodifikasi, dengan mempertimbangkan variasi plastisitas tanah dan kekasaran bidang geser. Pengujian dilakukan pada sampel tanah lempung dengan konsistensi very stiff dan hard, yang merepresentasikan kondisi lereng rawan retak. Alat uji geser dimodifikasi dengan sistem tekan air 0,5 kg/cm² dan sensor tekanan mikro untuk mensimulasikan kondisi lapangan. Hasil penelitian menunjukkan bahwa kohesi semu menurun signifikan seiring meningkatnya plastisitas dan kekasaran bidang geser, dengan nilai mendekati nol pada displacement maksimum, terutama pada bidang geser kasar. Penurunan ini disebabkan oleh kehancuran struktur semu antar partikel akibat proses geser. Temuan ini mengindikasikan bahwa kohesi semu bukan kekuatan intrinsik tanah, melainkan efek sementara dari struktur tanah yang terganggu akibat retakan. Pemahaman ini krusial untuk desain geoteknik dan evaluasi stabilitas lereng di wilayah rawan longsor. 
IoT and Solar Powered Storage System for Agricultural Product Quality Enhancement Suhra, Aminatus; Rohmayati, Nita Selvia; Junaidi, Imam; Sari, Cindy Yulia Kartika
Research Horizon Vol. 5 No. 5 (2025): Research Horizon - October 2025
Publisher : LifeSciFi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54518/rh.5.5.2025.815

Abstract

Postharvest losses remain a critical issue for corn farmers in Sumenep Regency, particularly in Lenteng Timur Village, where traditional storage methods fail to maintain product quality. This study aimed to design and develop an Internet of Things (IoT)-based agricultural storage system powered by renewable energy to enhance product quality, extend shelf life, and reduce farmer losses. The research employed a Research and Development (R&D) approach adapted from the Borg and Gall model, limited to six stages: problem identification, planning, prototype development, preliminary testing, revision, and main field testing. The system integrates DHT22 and MQ-135 sensors with an ESP32 microcontroller and a 200–300 Wp solar photovoltaic system. Field trials demonstrated that the IoT monitoring application provided real-time temperature, humidity, and gas concentration data with <2% deviation. The solar energy system generated 0.8–1.0 kWh/day, sufficient for continuous operation. Corn stored for 30 days in the IoT system exhibited 2.8% weight loss and 13–14% moisture content, compared to 7.4% weight loss and 16–18% moisture in traditional storage. User evaluation indicated high acceptance, with 90% of farmers reporting easier monitoring and 80% finding the system easy to use. These results suggest that integrating IoT and renewable energy in storage systems can effectively reduce postharvest losses, maintain crop quality, and promote sustainable agricultural practices. Further refinements are needed to enhance user-friendliness and backup energy capacity for broader implementation.
Co-Authors A.S., Rohmahillah Ngibadah, Irsyadul Pranadiarso, Tedy Prasetyo, Slamet R.B. Prasetyo, Slamet Rohadi Budi Putra, Adinata Laksana Rohmayati, Nita Selvia Sari, Cindy Yulia Kartika Subchan, Bagas R. SUHRA, AMINATUS Yanuar, Setyo Ferdi