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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik ITS IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science Jurnal Teknik Sipil Journal of Civil Engineering Jurnal Teknik Sipil Journal of Advanced Civil and Environmental Engineering Jurnal Penelitian Pendidikan IPA (JPPIPA) Civil Engineering Dimension Jurnal Aplikasi Teknik Sipil Jurnal Manajemen Aset Infrastruktur dan Fasilitas Logic : Jurnal Rancang Bangun dan Teknologi Portal: Jurnal Teknik Sipil Journal of Infrastructure and Facility Asset Management Publikasi Riset Orientasi Teknik Sipil (Proteksi) Seminar Nasional Ilmu Terapan Journal Integration of Management Studies
Januarti Jaya Ekaputri
Civil Engineering Department, Institut Teknologi Sepuluh Nopember, Surabaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Improving Geopolymer Characteristics with Addition of Poly-Vinyl Alcohol (PVA) Fibers Januarti Jaya Ekaputri; Chikako Fujiyama; Nobuhiro Chijiwa; Tu Dac Ho; Hung Thanh Nguyen
Civil Engineering Dimension Vol. 23 No. 1 (2021): MARCH 2021
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (606.075 KB) | DOI: 10.9744/ced.23.1.28-34

Abstract

This paper presents the benefits of PVA fibers in improving the mechanical properties of class F fly-ash-based geopolymer concrete. The activator used in the geopolymer was 8M sodium hydroxide (NaOH) and sodium silicate (Na2SiO3), with a mass ratio of Na2SiO3 to NaOH varied from 1.5 to 2.5. Cylindrical specimens with a diameter of 100 mm and a height of 200 mm were prepared for mechanical strength tests. The PVA fibers in the geopolymers were fixed at 0.4%, 0.6%, and 0.8% by total volume. Some mechanical tests were carried out, including compression, splitting, direct tensile and elastic modulus tests. It was found that the mixture with a ratio of alkalis of 1.5 and the PVA fiber content of 0.4% had the best workability. The highest compressive strength was obtained in a mixture with alkali activator ratios of 1.5 and 2.0, and with 0.6% fiber addition. The ratio of the tensile (and splitting-tensile) strength to compressive strength was found to increase with the certain amount of PVA fibers and the ratio of the alkali activators. The workability issue and fiber direction in the concrete were the dominant factors influencing the properties of geopolymer concrete.
Utilization Of Buton Asphalt Solid Waste (ASW) Waste Bitumen Extraction In Concrete Aulia, Siti Aja; Ekaputri, Januarti Jaya
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 7, No 1 (2024): April
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.7.1.48-64

Abstract

Indonesia has 650 million tons of Buton Rock Asphalt (Asbuton) deposits.  The mineral residue, known as Asphalt Solid Waste (ASW). The extraction left ASW by 65-90% of asbuton’s weight. However, 770 thousand tons/year of ASW remain underutilized, causing environmental pollution due to its hydrocarbon content. Based on XRD results, Asbuton minerals were dominated with 46% CaCO3, which are potential as a subtitute material in concrete. However, its hydrocarbon content at 68,911 ppm raises concerns. To prevent ASW hydrocarbons from contaminating concrete, solidification was attempted. This study investigates solidification by making Artificial Coarse Aggregate (ACA) products and using ASW as a subtitute for gravel in concrete. The ACAs were produced from a mixture of ASW and cement, molded into 50 x 100 mm cylinders, crushed after twenty eight-days moist curing, and tested according to ASTM C33 standard of gravel. ASW replaced 0-12.5% by volume of sand and ACA replaced 0-12.5% by volume of gravel in concrete with a target compressive strength of 45 MPa at twenty eight-days. Heat of hydration and shrinkage were tested to indentify the impact of CaCO3 from ASW on concrete. The results showed that ACA could reduce 9% of ASW hydrocarbons. However, the ACA produced did not meet the gravel standard in ASTM because ACA absorption reached 6.75% and abrasion test up to 57%. Neverthless, ASW’s high absorption reduced heat hydration by 10% and shrinkage by 83% compared to normal concrete.
Flocculant Assisted Treatment of Suspended Sidoarjo Mud Thilal Syihabuddin; Januarti Jaya Ekaputri; Chikako Fujiyama
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i11.11880

Abstract

This study investigates the use of lime-based flocculants as a treatment method for Sidoarjo mud (LUSI) to improve solid–liquid separation and reduce the environmental impact of its discharge into the Porong River. Several commercial lime-derived flocculants were tested through jar experiments to evaluate their effectiveness in promoting particle aggregation and enhancing settling behavior under conditions similar to the existing treatment pond. The results indicate that a mud-to-water ratio of 1:4 provided the most efficient sedimentation performance, reflected by faster settling rates and clearer supernatant. Among the flocculants examined, differences in chemical composition and particle morphology influenced the degree of aggregation and overall clarity of the treated water. The treatment substantially reduced turbidity and suspended solids, while also lowering chloride levels in the clarified water. These findings suggest that lime-based flocculants are a feasible option for mitigating the environmental burden of LUSI mud disposal by improving separation efficiency.
Capillary Imbibition of Concrete Containing Cold Bonded Fly Ash-Based Lightweight Aggregate in a Salt Environment Risdanareni, Puput; Sulton, Mohammad; Nindyawati, Nindyawati; Rosyidi, Ditya Hafidz; Ekaputri, Januarti Jaya; Razak, Rafiza Binti Abd.; Abdullah, Mohd Mustafa Al Bakri
Civil Engineering Dimension Vol. 28 No. 1 (2026): MARCH 2026
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.28.1.23-33

Abstract

Cold bonded lightweight aggregate generated from fly ash (FA LWA) has become an interesting approach to increase the consumption of fly ash and prevent over-mining of natural aggregate. However, using the cold-bonded hardening method could increase the number of open pores in LWA, making the concrete containing this LWA face an increased risk of degradation due to water ingress. Thus, in this research, the effect of using FA LWA in concrete on the mechanical and transport properties in a salt environment is being investigated. Three aggregate replacement ratios of 0, 50, and 100% were applied, while the salt environment was mimicked with NaCl and Na2SO4 solutions. The results show that the optimum replacement rate of FA LWA was 50%. Regarding the transport properties, exposing concrete to a salt environment (NaCl or Na2SO4) proved to slow down the capillary imbibition rate slightly.
Analisis Pemanfaatan Zat Aditif pada Reclaimed Asphalt Pavementuntuk Lapisan Beton Aspal: Additive Utilization Analysis in Reclaimed Asphalt Pavement for Asphalt Concrete Layer Ari Widayanti; Ria Asih Aryani Soemitro; Januarti Jaya Ekaputri
Jurnal Manajemen Aset Infrastruktur & Fasilitas Vol 4 No 1 (2020): Jurnal Manajemen Aset Infrastruktur & Fasilitas
Publisher : Departemen Teknik Sipil ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Infrastruktur dan fasilitas transportasi merupakan hal-hal yang sangat diperlukan untuk menunjang aktivitas masyarakat, pembangunan dan pengembangan wilayah. Manajemen aset infrastruktur dan fasilitas transportasi perlu dikelola dengan baik. Dalam rangka penghematan sumberdaya alam, maka pemanfaatan RAP sebagai hasil pengerukan sebagian perkerasan jalan sangat diperlukan. RAP merupakan material sisa, sehingga terdapat kelemahan yang dapat mempengaruhi kinerja teknisnya. Oleh karena itu memerlukan penambahan material lain untuk dapat memperbaiki sifat material RAP. Penambahan zat aditif mampu memperbaiki sifat RAP terutama dari sisi kelemahan aspal RAP pada lapisan aspal beton. Tujuan studi ini adalah memperoleh hasil analisis terhadap sifat fisik dan kimia zat aditif untuk memperbaharui sifat aspal RAP pada lapisan aspal beton. Metode yang digunakan adalah studi literatur dari peneliti terdahulu dan analisis zat aditif terhadap parameter pengujian aspal. Hasil yang diperoleh adalah pemanfaatan zat aditif berpengaruh terhadap nilai penetrasi, daktilitas, viskositas aspal. Penambahan zat aditif pada RAP dapat meningkatkan nilai penetrasi aspal RAP dan mengurangi viskositas, sehingga mengurangi getas pada aspal RAP dan meningkatkan kinerja campuran aspal beton. Zat aditif NR aman dan layak digunakan untuk aditif pada perkerasan jalan dengan RAP.
Karakteristik Material Pembentuk Reclaimed Asphalt dari Jalan Nasional di Provinsi Jawa Timur Ari Widayanti; Ria Asih Aryani Soemitro; Januarti Jaya Ekaputri; Hitapriya Suprayitno
Jurnal Manajemen Aset Infrastruktur & Fasilitas Vol 1 No 1 (2017): Jurnal Manajemen Aset Infrastruktur & Fasilitas
Publisher : Departemen Teknik Sipil ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26151847.v1i1.3759

Abstract

Jalan merupakan salah satu aset infrastruktur yang sangat penting dalammemperlancar arus distribusi barang dan pergerakan masyarakat. Pembangunaninfrastruktur yang meningkat dewasa ini membutuhkan material yang meningkat pula,perlu diimbangi dengan alternatif material lain yang tersedia di alam. Reclaimed Asphaltmerupakan material yang dihasilkan dari pengupasan konstruksi perkerasan jalan.Penambahan lapis perkerasan akan menyebabkan elevasi jalan semakin meningkat,sehingga kondisi permukaan jalan semakin tidak ideal. Volume Reclaimed Asphalt yangsemakin menumpuk, dan pemanfaatan yang belum optimal merupakan hal yang perlumendapat perhatian saat ini. Metode yang digunakan adalah metode studi literatur daripeneliti terdahulu pada pada jalan nasional di Provinsi Jawa Timur. Hasil yangdiperoleh adalah karakteristik agregat Reclaimed Asphalt memenuhi syarat SpesifikasiBina Marga Tahun 2010 Revisi 3, sedangkan parameter penetrasi dan daktilitas aspalReclaimed Asphalt tidak memenuhi persyaratan. Untuk itu perlu adanya penambahanmaterial baru untuk mengantisipasi kelemahan yang terjadi sehingga dapat memenuhispesifikasi teknis material perkerasan jalan.
Co-Authors . Faimun Abda Abda Abdullah, Mohd Mustafa Al Bakri Achmad Freddya Eka Prasandha Adha, Augusta Adlizie Rifkianda Muhammad Adriyan Candra Purnama Afgani, Kurnia Fajar Ahyudanari, Ervina Aji, Pujo Annisa Rahmadina Antonius Antonius Ari Widayanti Ari Widayanti Ari Widayanti Ari Widayanti Ari Widayanti Aulia, Siti Aja Azwar Annas Bari, M. Shahib Al Buntara S. Gan Chikako Fujiyama Diana, Nur Ayu Dimas Setiyo Nugroho Dora Melati Nurita Sandi Dwa Desa Warnana Han Ay Lie Hendrawan Setyo Warsito Herry Budianto Hitapriya Suprayitno, Hitapriya Hung Thanh Nguyen Ign. Harry Sumartono Imam Junaidi Indarto Indarto Irawan, Candra Junaedi Utomo Kusbiantoro, Andri Laory, Irwanda M. Shahib Al Bari M. Shofi’ul Amin Makno Basoeki Mohammad Sulton Nikmatus Solikha Nindyawati Nindyawati Nobuhiro Chijiwa Prastyanto, Catur Arif Puput Risdanareni Raden Aswin Rahadi Ratna Handayani Razak, Rafiza Binti Abd. Ria Asih Aryani Soemitro Ridho Bayuaji Rosyidi, Ditya Hafidz Setiamarga, Davin H. E. Sidiq Purnomo Thilal Syihabuddin Toni Budi Santoso Trihanyndio Rendy Satrya Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Triwulan Tu Dac Ho Vandi Alextrianto Widi Astuti Winda Agustin Wiwik Handayani Yeni Rochsianawati Yusak Nurrizki