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INDONESIA
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil
Published by Asosiasi Riset Ilmu Teknik Indonesia
ISSN : 30315069     EISSN : 30314089     DOI : 10.61132
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering
research journal of the Engineering Science Clump. The fields of study in this journal include the sub-groups of Civil Engineering and Spatial Planning, Industrial Engineering, Electrical and Computer Engineering, Earth and Marine Engineering
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 183 Documents
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Analisis dan Uji Kekuatan Pukul Komposit Helm Ukuran Dewasa berbasis Ijuk Resin dengan Perendaman Alkali Santoso, Satria Ageng Gigih; Hadi, Syamsul; Firdaus, Prima Rifqi
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 3 No. 4 (2025): Oktober : Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v3i4.1184

Abstract

Indonesia is one of the countries with abundant availability of palm fiber composite, yet its application in advanced material technology remains limited. On the other hand, most motorcycle helmets available in the market are made from ABS plastic, which has limitations in impact energy absorption and may increase the risk of head injuries during accidents. This study aims to develop helmet composites based on palm fiber and epoxy resin by varying the fiber volume fractions (15%, 25%, and 35%) and alkali soaking durations (75, 150, 225, and 300 minutes). The impact strength test results showed that the combination of 35% fiber volume and 225-minute alkali soaking produced the highest specific impact energy (SIP) of 0.142 J/mm². As a comparison, SNI-compliant helmets made from ABS plastic only reached an EPS value of 0.00972 J/mm², indicating that palm fiber-based composite helmets could improve impact energy absorption efficiency by more than 14 times. The results conclude that increasing the fiber volume fraction and optimizing the alkali treatment duration significantly enhances the impact resistance, making ijuk-based composite helmets a promising alternative for safer and more eco-friendly protective gear.
Analisa Peningkatan Kualitas Layanan Pelanggan untuk Mengoptimalkan Kepuasan Pelanggan pada Industri Ratu D’laundry Arlita Yunia Saputri; Syifa Yulianti; Nurlelah Nurlelah; Budiharjo Budiharjo
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 3 No. 4 (2025): Oktober : Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v3i4.1187

Abstract

This study aims to evaluate improvements in customer service quality with the goal of increasing customer satisfaction at Ratu D'Laundry. The approach used is quantitative with a descriptive methodology, where data is collected through a survey that measures five main aspects, namely service quality, process speed, price and promotions, customer service, and overall satisfaction and loyalty levels. The results of this study indicate that most customers are satisfied with the services provided, especially in terms of laundry cleanliness, clothing fragrance, and the friendly attitude of staff in providing services. These results show that these factors play an important role in shaping customers' positive perceptions of service quality. However, this study also found several complaints related to service completion time, which is considered to still need improvement. Overall, this study confirms previous findings that service quality has a significant impact on customer satisfaction. The proposed strategy to improve service completion time is a key step in building trust, meeting consumer expectations, and encouraging long-term customer loyalty.
Analisis Panjang Serat dan Durasi Perendaman NaOH terhadap Kekuatan Tarik Komposit Epoksi Berpenguat Bulu Kambing Prima Rifqi Firdaus; Syamsul Hadi; Satria Ageng Gigih Santoso
Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik Sipil Vol. 3 No. 4 (2025): Oktober : Konstruksi: Publikasi Ilmu Teknik, Perencanaan Tata Ruang dan Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/konstruksi.v3i4.1188

Abstract

The problem with previous studies was the use of polyester resin as a matrix in kacang goat hair fiber composites, whereas in the latest study, epoxy resin was used, which has not been widely used. The aim was to obtain the tensile strength of composites that could be used as an alternative material for fan blades. The research method used was experimental with composite fabrication using the hand lay-up method, varying fiber lengths of 10 mm, 20 mm, and 30 mm, and varying immersion times in a 5% NaOH solution for 25, 50, 75, and 100 minutes. Tensile strength testing was carried out using the ASTM D638 standard with a total of 36 specimens. The test results showed that specimens with a fiber length of 30 mm and a soaking time of 50 minutes produced the highest tensile strength of 28.69 MPa, while the lowest tensile strength of 15.38 MPa was obtained in specimens with a fiber length of 10 mm and a soaking time of 100 minutes. This indicates that the highest tensile strength value is 46.37% greater than the lowest value, so the combination of a fiber length of 30 mm and a soaking time of 50 minutes is determined to be the optimal parameter in this study.

Page 19 of 19 | Total Record : 183

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