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ANALISIS KEKUATAN BANGKU TAMAN BERBAHAN CEMENTITIOUS COMPOSITE DENGAN CAMPURAN FLY ASH DAN PASIR LIMBAH SANDBLASTING M. Rizal Fahmi; Wiwik Dwi Pratiwi; Fitroh Resmi; Luqman Cahyono; Endang Fitria Rahmawati; Hanum Wardah Anggraeni
JISO : Journal of Industrial and Systems Optimization Vol. 8 No. 1 (2025): Juni 2025
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v8i1.67-75

Abstract

ABSTRAK Meningkatnya kebutuhan akan ruang terbuka yang nyaman dan berkelanjutan mendorong inovasi dalam pemilihan material furnitur luar ruangan. Penelitian ini bertujuan untuk mengembangkan bangku taman berbahan cementitious composite ramah lingkungan dengan memanfaatkan limbah industri berupa fly ash, pasir sandblasting, dan fiberglass sebagai bahan penguat. Cementitious composite yang kuat, tahan cuaca ekstrem, tahan terhadap serangan serangga serta jamur serta fleksibilitas dalam desain membuatnya menjadi pilihan ideal untuk penggunaan di luar ruangan. Empat variasi campuran dibuat dengan substitusi fly ash sebesar 0%, 20%, 30%, dan 40%. Pembuatan spesimen sampel uji tekan dan tarik dilakukan pada 4 variasi dengan 3 kali replikasi untuk masing-masing varian. Hasil cetakan didiamkan terlebih dahulu selama 24 jam kemudian dilanjutkan dengan proses curing selama 28 hari. Seluruh spesimen uji tekan dan tarik diuji dengan menggunakan standar ASTM C-39 dan C-307. Pengujian kuat tekan dan tarik dilakukan untuk menentukan varian dengan performa mekanik terbaik. Hasil menunjukkan bahwa substitusi fly ash sebesar 20% menghasilkan kekuatan tekan dan tarik tertinggi, yaitu 30,27 MPa dan 4,16 MPa. Desain bangku taman selanjutnya disimulasikan menggunakan software Fusion 360 dengan masukan data material dari hasil uji laboratorium. Analisis menunjukkan bahwa desain memiliki nilai safety factor minimum 3,46 dan nilai von misses stress maksimum 0,884 MPa yang berada jauh di bawah batas kerusakan material. Dengan demikian, bangku taman yang dirancang terbukti aman dan layak digunakan, sekaligus berkontribusi terhadap pengurangan limbah industri dan peningkatan estetika ruang publik secara berkelanjutan. ABSTRACT The increasing need for comfortable and sustainable outdoor spaces drives innovation in the selection of outdoor furniture materials. This study aims to develop an environmentally friendly cementitious composite park bench by utilizing industrial waste in the form of fly ash, sandblasting sand, and fiberglass as reinforcing materials. Strong cementitious composite, resistant to extreme weather, resistant to insect and fungal attacks and flexibility in design make it an ideal choice for outdoor use. Four variations of the mixture were made with fly ash substitution of 0%, 20%, 30%, and 40%. The manufacture of compressive and tensile test sample specimens was carried out on 4 variations with 3 replications for each variant. The mold results were left for 24 hours first and then continued with a curing process for 28 days. All compressive and tensile test specimens were tested using ASTM C-39 and C-307 standards. Compressive and tensile strength tests were carried out to determine the variant with the best mechanical performance. The results showed that 20% fly ash substitution produced the highest compressive and tensile strengths, namely 30.27 MPa and 4.16 MPa. The park bench design was then simulated using Fusion 360 software with input of material data from laboratory test results. The analysis shows that the design has a minimum safety factor value of 3.46 and a maximum von misses stress value of 0.884 MPa which is far below the material damage limit. Thus, the designed park bench is proven to be safe and suitable for use, while contributing to the reduction of industrial waste and the improvement of the aesthetics of public spaces in a sustainable manner.
Co-Authors Adhi Setiawan Adristi Nisazarifa Agung Rahayu Prasetyo Utomo Ahmad Fikrie Amanda Rosalina Annisa' Carina Ardani Ahsanul Fakhri Attala Zaki Hermansyah Aygasta Firstya Alliyrahmanda Ayu Nindyapuspa Denny Dermawan Desrilia Nursyifaulkhair Dewa Ardhy Raditya Laksana Dika Anggara Dika Rahayu Widiana Endang Fitria Rahmawati Endang Pudji Purwanti Endang Pudji Purwanti Eriek Wahyu R W Firda Fardina Fitroh Resmi Hanum Wardah Anggraeni Ilham Nurcholis Indra Leo Firmansyah Inshiro Auliyasari Laksmana Angga Persada Lina Indawati Luqman Cahyono M. Rizal Fahmi Mar'atus Sholihah Milasari Mochamad Yusuf Santoso Mochammad Karim Al Amin Mohamad Hakam muhammad Koderi Hendrik Waluyo Nur Fajar Aprilia Sari Primaningtyas, Widya Emilia Raehanah Adelia Raffie Alfriesgasjah Reza Permana Mustofa Ria Rismawati Ridha Inayah Rizal Indrawan Ryan Yudha Adhitya Vivin Setiani Wanda Cahyaning Ati