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All Journal Jurnal Perencanaan Wilayah dan Kota RUANG: JURNAL LINGKUNGAN BINAAN (SPACE: JOURNAL OF THE BUILT ENVIRONMENT) Jurnal Sosioteknologi JISO : Journal of Industrial and Systems Optimization Jurnal DIALEKTIKA : Jurnal Ilmu Sosial Jurnal Sutramas Jurnal Lingkungan Binaan Indonesia Journal of Mandalika Review Jurnal Cakrawala Maritim Jurnal Teknologi Maritim PROCEEDINGS CONFERENCE ON DESIGN AND MANUFACTURE AND ITS APPLICATION
Wiwik Dwi Pratiwi
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Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Analisis Pengaruh Penambahan Senyawa Fire Retardant terhadap Sifat Ketahanan Api, Kekuatan, Keuletan, dan Kekakuan Glass Fiber Reinforced Polymer (GFRP) Jasillatul Hikmiyah; Wiwik Dwi Pratiwi; Rizal Indrawan
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 5 No 1 (2021): Conference on Design and Manufacture and Its Aplication
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

Glass Fiber Reinforced Polymer (GFRP) is one type of material is widely used in manufacturing land transportation components, especially is train. The requirement of material for thetrain must be fire resistance. But in the other hand the GFRP material is still have weakness in high temperature. So, in this case it can provide an opportunity to take experiment about the GFRP material. The experimental method to improvement of GFRP material is adding additive fire retardant as a filler. The additive fire retardant used as a filler is magnesium hydroxide. The method for making specimens of GFRP fire retardant using hand layup method. GFRP which has been added with magnesium hydroxide is tested for fire resistance according to the ORE B 106.2 standart and the tensile strength according to the ASTM D-638 standart. The results show that after adding 30%, 35%, 40%, 45%, and 50% magnesium hydroxide by weight of polyester resin can increase the fire resistance of GFRP. The addition of magnesium hydroxide in the polyester resin caused reducing the tensile strength and modulus of elasticity. Fire resistance, tensile strength, elongation, and modulus of elasticity obtained optimum at the addition 35% magnesium hydroxide by weight of polyester resin. The result show that the carbonized surface of 68,67 cm2, time afterburn was 3,6 second after the flame has been extinguished, tensile strength of 70,86 MPa, elongation of 11,92%, and modulus of elasticity is 5,96 MPa. Therefore, GFRP with the addition 35% of magnesium hydroxide can be fire resistance, but it can't be used as an interior of the train because the tensile strength is less than standart.
Analisis Variasi Komposisi terhadap Kekuatan Tarik Komposit Serat Daun Nanas dengan Orientasi Random Evy Agnessylviana Rooseta; Wiwik Dwi Pratiwi; Widya Emilia Primaningtyas
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 5 No 1 (2021): Conference on Design and Manufacture and Its Aplication
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

Pineapple leaf waste that is treated properly will provide added value. For example, the use of pineapple leaf fiber for the manufacture of composites. In addition, composites with natural fibers are lighter than synthetic fibers. Synthetic fibers also have several disadvantages, namely they can irritate the hands and can injure the lungs during the production process. In this study, research was conducted on the effect of orientation and composition on the tensile strength of pineapple leaf fiber reinforced composites. The arrangement of the fibers used is random, while the variations in fiber composition are 55%, 60% and 65% based on volume fraction. Pineapple leaf fiber used through the delignification process using 5% NaOH solution for 2 hours. The composite that produces the greatest tensile strength is a composite with one direction fiber orientation with a fiber composition of 55%, namely 7.18 ± 0.91 MPa. While the lowest tensile strength in random orientation composites with a fiber composition of 65% is 4.04 ± 1.02 MPa.
EFEK SINERGIS ALUMINA TRIHYDRATE DAN MELAMINE CYANURATE TERHADAP SIFAT KUAT TARIK GLASS FIBER REINFORCED POLYMER Ridha Inayah; Wiwik Dwi Pratiwi; Rizal Indrawan
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 6 No 1 (2022): Conference on Design and Manufacture and Its Aplication
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

Glass Fiber Reinforced Polymer, commonly known as GFRP, is that as a train interior component, it must have good mechanical properties. The addition of flame retardant compounds contained in GFRP materials can affect the tensile strength of GFRP materials. In this study, GFRP composed of Alumina Trihydrate (ATH) and Melamine Cyanurate (MCA) powder was mixed into a vinyl ester resin. The method of making GFRP specimens uses the hand lay-up method. GFRP was mixed and tested for material with ASTM D-638 standard tensile test. The results obtained after the addition of 25% ATH, a mixture of 5%, 10%, and 15% MCA at 25% ATH, 25% ATH in the outermost layer, and a mixture of 5% MCA with 25% ATH in the outermost layer to the weight of the resin was a decrease in strength when the percentage of filler powder increases. Tensile strength, strain, and modulus of elasticity of GFRP were optimum at the addition of 25% ATH with 5% MCA to the weight of the resin in the outer layer. The result of tensile strength is 124.37 MPa, strain is 12.76%, and modulus of elasticity is 975.85 MPa. The results show that a mixture of ATH and MCA has a synergistic effect, so that it becomes a recommendation for interior sidewall panels and ceiling panels on trains.
Analisis Pengaruh Variasi Susunan Laminasi dan Penambahan Fly Ash Terhadap Kekuatan Bending Komposit Hybrid Berpenguat Serat Daun Nanas-Woven Roving Fiberglass Siti Annuriyah; Wiwik Dwi Pratiwi; Widya Emilia Primaningtyas
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 6 No 1 (2022): Conference on Design and Manufacture and Its Aplication
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

The supply of pineapple leaf waste has great potential to provide benefits, other than just being composted or burned. Instead, the process will have an impact on humans and the environment. In addition, the handling of fly ash waste has also recently become a concern. The abundance of them and the lack of utilization add to the series of waste handling problems. Composite technology is one of the waste control solutions. Composite technology helps in the use of wastes as composite materials into new materials, especially in the shipping sector and generally for application in other industrial fields. This research aims to determine the effect of laminate configuration and fly ash substitution on the bending strength of the pineapple leaf fiber-reinforced hybrid composite WR200 as an alternative hull material. The configuration of the laminate was varied, and the effect of the substitution of fly ash as a filler on the composite was also analyzed. The variations used in this study are laminated configurations with fly ash substitution and without fly ash substitution. Composite samples were manufactured using the hand lay-up method with a reinforcement: matrix composition of 30%:70 %. The resulting composite with the highest bending strength of 120.47 MPa in the CWWC laminate configuration without fly ash substitution. The resulting composite can be applied as an accommodation room bulkhead material according to the SNI 01-4449-2006 standard.
Pengaruh Komposisi Bahan Baku Geopolimer Terhadap Kuat Tekan Liza Malik; Wiwik Dwi Pratiwi; Pranowo Sidi
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 7 No 1 (2023): Conference On Design And Manufacture Its Application
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

Geopolymer are solid inorganic polymers produced from a chemical reaction called geopolymerization, which occurs between an alkaline solution and an aluminosilicate source. Geopolymers have been widely studied due to their known compressive strength resistance. This study aims to determine the optimal geopolymer composition for achieving compressive strength resistance. The compressive strength of geopolymers is determined by identifying the highest compressive strength value obtained from a compression test. In this study, variations in raw materials were explored, including Metakaolin at levels of 100%, 90%, 80%,70%,and 60%, Silica Fume at levels of 20%, 30%, and 40%, along with 10% Aluminium Hydroxide. The activator solutions used were Water Glass and KOH solution. The primary test conducted in this study was a compressive strength test aimed at evaluating the geopolymers strength. The results demonstrated that employing a composition of 90% Metakaolin and 10% Aluminium Hydroxide yielded the most favorable outcome. This particular composition exhibited a high compressive strength value of 40,8 MPa, with a standard deviation of ± 1,0 MPa.
Pengaruh Penambahan Natrium Borax Tetra Hydrate dan Diammonium Phosphate Terhadap Kuat Tekan Geopolimer Egalita Islami Bilqis; Wiwik Dwi Pratiwi; Rizal Indrawan
Proceedings Conference On Design Manufacture Engineering And Its Application Vol 7 No 1 (2023): Conference On Design And Manufacture Its Application
Publisher : Proceedings Conference On Design Manufacture Engineering And Its Application

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Abstract

Geopolymers are solid inorganic polymers produced from a chemical reaction called geopolymerization between an alkaline solution and an aluminosilicate source. Aluminosilicate materials are composed of silica and alumina atoms. To activate the polymerization reaction between silica (Si) and alumina (Al) an activator solution is needed. Many studies have used geopolymers because they are known for their fire retardant properties. With the added ingredients of Sodium Borax Tetra Hydrate and Diammonium Phosphate, these two added ingredients have the potential to be fire retardants. To determine the effect of the addition of geopolymer additives, pressure testing was carried out on the specimens before and after being burned at 900 oC for 1 hour. In this study, using raw materials metakaolin and silica fume of 80:20 (%) and a constant KOH pellet and water glass activator solution. As well as varying the additives, namely 1% Sodium Borax Tetra Hydrate, 1% Diammonium Phosphate and specimens without additives. The results of the compression test showed that the composition that had the best compressive strength before combustion was the addition of 1% Diammonium Phosphate, which was 24.4 MPa. While the specimens after burning which have the highest compressive strength value are the specimens without additives, namely 9.5 MPa.
Regional Planning Strategy For Sustainable Rental Villa Development In The Lembang Tourism Area Dananjaya, Ahmad Ghazy; Wiwik Dwi Pratiwi
Jurnal Perencanaan Wilayah dan Kota Vol. 20 No. 1 (2025)
Publisher : Program Studi Perencanaan Wilayah dan Kota, UPT Publikasi Publikasi Ilmiah UNISBA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jpwk.v20i1.5661

Abstract

Subdistrict Lembang, as a leading tourist destination in Indonesia, has significant potential for the development of sustainable rental villas. This study aims to analyze effective regional planning strategies in the development of rental villas, focusing on sustainability and tourism management. A mixed methods approach was used, combining surveys with 311 tourists and interviews with local stakeholders. The results of the quantitative analysis showed that 80% of tourists prefer environmentally friendly accommodations that are integrated with nature, with 65% opting for renewable energy, 70% supporting efficient waste management, and 75% preferring environmentally friendly building materials. Interviews revealed that 70% of stakeholders believe that good planning can enhance the tourist experience and minimize negative impacts on the local community. Local community involvement has also proven to be essential in improving economic welfare and providing authentic experiences for tourists. The findings suggest that the development of rental villas in Lembang should consider appropriate zoning, the integration of environmentally friendly technologies, and collaboration between the government, villa managers, and local communities to achieve long-term sustainability. This study makes a significant contribution to the development of sustainable regional planning and sustainable tourism theories, and offers practical recommendations for local government policies.
ANALISIS KEKUATAN BANGKU TAMAN BERBAHAN CEMENTITIOUS COMPOSITE DENGAN CAMPURAN FLY ASH DAN PASIR LIMBAH SANDBLASTING Fahmi, M. Rizal; 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.
Analisis Pengaruh Variasi Filler dan Kuat Arus Pengelasan Dissimilar SM490YA dengan Cast Steel terhadap Ketangguhan Mohammad Thoriq Wahyudi; Leonandra Eka Valentino; Wiwik Dwi Pratiwi
Jurnal Teknologi Maritim Vol. 7 No. 2 (2024): Jurnal Teknologi Maritim
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35991/jtm.v7i2.39

Abstract

Dissimilar material welding adalah proses penyambungan dua jenis logam yang berbeda. Penelitian ini mengkaji kegagalan sambungan berupa retak atau patah yang diduga disebabkan oleh penggunaan kuat arus yang tidak sesuai dan filler metal dengan kekuatan tarik yang lebih rendah daripada material dasar. Dua jenis filler metal, yaitu ER70S-6 dan ER80S-G, serta tiga variasi kuat arus, yaitu 100A, 175A, dan 250A, digunakan dalam penelitian ini. Uji yang dilakukan meliputi uji ketangguhan. Hasil penelitian menunjukkan nilai ketangguhan tertinggi sebesar 2,31 J/mm² pada daerah weld metal dengan filler ER80S-G dan arus 100A, serta nilai ketangguhan terendah sebesar 0,84 J/mm² pada daerah HAZ Cast Steel dengan filler ER70S-6 dan arus 250A.
Co-Authors Ahmad Candra Ahmad Candra, Ahmad Amellita, Nesya Bangga Prameswara Dananjaya, Ahmad Ghazy Deny Wibisono Devi Kartika Sari Utomo Dika Anggara Egalita Islami Bilqis Endang Fitria Rahmawati Eriek Widodo Evy Agnessylviana Rooseta Fakhrisa Nur Paramarta Fitroh Resmi Frisda Sfarliana Givano Ramadhan Hanum Wardah Anggraeni Ilma Nurfadlilawati Jasillatul Hikmiyah Leonandra Eka Valentino Liza Malik Luqman Cahyono M. Rizal Fahmi Meriyati Huka Gusadi Moch. Aria Firmansyah Mochammad Karim Al Amin Moh. Miftachul Munir Mohammad Thoriq Wahyudi Naufalika Anggy Zidany Nesya Amellita Nyoman Ratih Prabandari Pranowo Sidi Prastyawan, Rikat Eka Primaningtyas, Widya Emilia Prisca Bicawasti Budi Sutanty Ridha Inayah Rizal Indrawan Rumba Sasti Prajasa Siti Annuriyah Tasya Fatihah Teddy Eka Wijaya Utari Azalika Rahmi