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Teras Jurnal
Published by Universitas Malikussaleh
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Core Subject : Social, Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Environmental Science
Teras Jurnal is a journal that communicates the results of research within the scope of civil engineering and scientific development as well as aspects of practitioners. The process of manuscript submission is open throughout the year. All submitted manuscript will be screened with double-blind peer review and editorial review before they are accepted to publish. Teras Jurnal receives a manuscript from the following area below civil engineering science and development with the interdisciplinary and multidisciplinary approach:
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Articles 444 Documents
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Uji Total Suspended Solid (TSS) Menggunakan Metode Gravimetri Pada Sampel Air Baku Waduk Manggar Karang Joang Kota Balikpapan Rahmat Bangun Giarto; Mariatul Kiptiah; Audrey Adinda Deand D
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1380

Abstract

Abstrak   Total Suspended Solids (TSS) merupakan parameter fisik kualitas air yang menunjukkan jumlah partikel padat tersuspensi dan berkaitan dengan tingkat kekeruhan. Pengukuran TSS penting karena konsentrasi yang tinggi dapat mengurangi kejernihan air, menghambat penetrasi cahaya, memengaruhi ekosistem perairan, dan menambah beban pengolahan air baku. Penelitian ini bertujuan menentukan konsentrasi TSS pada air baku Waduk Manggar di tiga titik dan air distribusi PDAM di tiga rumah pelanggan, mengevaluasi kesesuaiannya terhadap baku mutu yang relevan, serta mengidentifikasi faktor yang memengaruhi keandalan pengujian gravimetri. Penelitian menggunakan pendekatan kuantitatif eksperimental melalui pengujian di UPTD Labkesda Balikpapan, pengujian gravimetri awal sebanyak tiga kali ulangan dengan volume 150 mL dan neraca berketelitian 0,1 g, serta pengujian ulang air PDAM menggunakan volume 1.000 mL dan neraca berketelitian 0,001 g. Hasil Labkesda menunjukkan konsentrasi TSS air waduk sebesar 17, 24, dan 62 mg/L. Berdasarkan baku mutu air danau atau waduk kelas I sebesar 25 mg/L, dua titik memenuhi baku mutu, sedangkan titik terdalam melampauinya. TSS air distribusi PDAM berkisar 13–17 mg/L dan disajikan secara deskriptif karena tidak dibandingkan dengan baku mutu waduk. Pengujian gravimetri awal menghasilkan 1.333–5.333 mg/L pada air waduk dan 667–2.667 mg/L pada air PDAM, sedangkan pengujian ulang menghasilkan 0–20 mg/L. Perbedaan hasil menunjukkan bahwa keterbacaan neraca, volume contoh uji, homogenisasi, preparasi media penyaring, pengeringan, dan pencapaian bobot tetap sangat memengaruhi keandalan pengujian.   Kata kunci: air baku, gravimetri, kualitas air, TSS, Waduk Manggar.   Abstract   Total Suspended Solids (TSS) is a physical water-quality parameter that indicates the amount of suspended particulate matter and relates to turbidity. TSS measurement is important because high concentrations can reduce water clarity, limit light penetration, affect aquatic ecosystems, and increase the burden of raw-water treatment. This study aimed to determine TSS concentrations in raw water from Manggar Reservoir at three sampling points and in PDAM water from three households, evaluate compliance with the relevant water-quality standard, and identify factors affecting the reliability of gravimetric testing. A quantitative experimental approach was applied through testing at the Balikpapan Regional Health Laboratory, triplicate initial gravimetric testing using a 150 mL sample and a balance with 0.1 g readability, and repeat testing of PDAM water using a 1,000 mL sample and a balance with 0.001 g readability. Laboratory results showed reservoir-water TSS concentrations of 17, 24, and 62 mg/L. Based on the Class I lake and reservoir standard of 25 mg/L, two points complied with the standard, whereas the deepest point exceeded it. TSS concentrations in PDAM water ranged from 13 to 17 mg/L and were described without comparison with the reservoir standard. Initial gravimetric testing produced 1,333–5,333 mg/L in reservoir water and 667–2,667 mg/L in PDAM water, whereas repeat testing produced 0–20 mg/L. The differences indicate that balance readability, sample volume, homogenization, filter preparation, drying, and attainment of constant mass strongly influence test reliability.   Keywords: gravimetry, Manggar Reservoir, raw water, TSS, water quality.
Prediksi Ketersediaan Air Berdasarkan Debit Andalan untuk Kebutuhan Irigasi di Bendung Copong Sulwan Permana; Adi Susetyaningsih; Alan Wijaya
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1386

Abstract

Abstrak   Kabupaten Garut masih mengandalkan sektor pertanian sebagai penunjang perekonomian daerah. Dalam mendukung sektor pertanian, pemerintah pusat bekerja sama dengan pemerintah daerah mengenai tata kelola sumber daya air untuk kelangsungan irigasi.  Infrastuktur sumber daya air di Kabupaten Garut adalah bendung Copong. Daerah Irigasi Leuwigoong dengan luas layanan 5313 hektar dialiri dari bendung Copong. Kebutuhan dan ketersediaan air merupakan faktor utama dalam pertanian. Tujuan penelitian untuk mengetahui rangkaian debit andalan yang akan dipakai dalam merencanakan pola tanam. Pos hujan yang diperhitungkan adalah 4 pos, yaitu pos Pamegatan, pos Pangauban, Pos Kepakan, dan pos Tarogong dari tahun 2015 sampai 2024. Debit simulasi digunakan cara F.J. Mock, debit andalan yang didapat dari debit simulasi besarnya berfluktuasi di musim hujan besar debit melebihi debit normal yaitu 8,66 m3/detik. Musim Tanam (MT) disesuaikan dengan debit andalan setiap bulan, dengan  awal MT I dan MT II masing-masing bulan November dan Maret setiap tahunnya.   Kata kunci: bendung, debit, irigasi, kebutuhan, ketersediaan       Abstract   Garut Regency continues to rely on the agricultural sector as a cornerstone of its regional economy. To support this sector, the central government collaborates with the local government on water resource management to ensure irrigation sustainability. A key piece of water resource infrastructure in Garut Regency is the Copong Weir. The Leuwigoong Irrigation Area, which covers a service area of 5,313 hectares, is supplied by this weir. Water demand and availability are the primary factors in agriculture. The purpose of this study is to determine the range of dependable flow to be used in planning cropping patterns. The analysis incorporates data from four rainfall stations—Pamegatan, Pangauban, Kepakan, and Tarogong—covering the period from 2015 to 2024. The simulation discharge was calculated using the F.J. Mock method. The dependable flow derived from these simulations fluctuates; during the rainy season, the discharge exceeds the normal level, reaching 8.66 m³/s. The Cropping Seasons are adjusted according to the monthly dependable flow, with Cropping Season I and II beginning in November and March each year, respectively.   Keywords: weir, flow, irrigation, requirement, availability
Analisis Kerusakan Jalan Menggunakan Metode IKP (Indeks Kondisi Perkerasan) Aji Suraji; Ermelinda Gae Jati; M Cakrawala
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1403

Abstract

Abstrak   Kerusakan jalan adalah penurunan fungsi dan kualitas permukaan jalan akibat berbagai faktor yang mengurangi daya tahan serta performanya. Dalam Penelitian ini bertujuan untuk mengevaluasi kondisi kerusakan jalan pada perkerasan kaku di ruas jalan Bojonegoro-Ngawi, dengan menggunakan metode Indeks Kondisi Perkerasan (IKP). Metode penelitian dilakukan secara visual pada perkerasan kaku sepanjang 500 meter menggunakan metode Indeks Kondisi Perkerasan (IKP), yang mencakup indentifikasi jenis kerusakan fisik penilaian tingkat keparahan serta pemberian rekomendasi pemeliharaan yang tepat. Hasil analisis menunjukkan bahwa kondisi permukaan jalan berada pada kategori parah untuk arah normal dengan nilai IKP 33,45 dan kategori jelek untuk arah opposite dengan nilai IKP 37,40. Jenis kerusakan yang paling dominan ditemukan adalah retak linear dengan persentase kejadian mencapai 40% arah normal dan 33% pada arah opposite. Berdasarkan nilai IKP yang berada di bawah ambang batas 55, kesimpulan utama penelitian ini merekomendasikan penanganan berupa rekonstruksi total atau daur ulang struktur jalan.   Kata Kunci: Indeks Kondisi Perkerasan, Kerusakan Jalan, Perkerasan Kaku, Rekomendasi Penanganan       Abstract   Road damage is a decline in the function and quality of the road surface due to various factors that reduce its durability and performance. This study aims to evaluate the condition of road damage on rigid pavement along the Bojonegoro-Ngawi road section using the Pavement Condition Index (PCI) method. The visual research method was conducted on a 500-meter stretch, including identifying physical distress types, assessing severity levels, and providing appropriate maintenance recommendations. The analysis shows that the road surface condition is "serious" for the normal direction with a PCI value of 33.45 and "poor" for the opposite direction with a PCI value of 37.40. The most dominant distress found is linear cracking, reaching 40% in the normal direction and 33% in the opposite direction. Based on PCI values below the 55 threshold, the main conclusion recommends total reconstruction or road structure recycling.   Keywords: Pavement Condition Index (PCI), Road Damage, Rigid Pavement, Maintenance Recommendations
Pengaruh Penambahan Tepung Jagung Sebagai Filler terhadap Karakteristik Campuran Aspal Porus Wesli Wesli; Nura Usrina; Said Jalalul Akbar; Diana Riskya Pirdiastuti
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1404

Abstract

Abstrak   Penelitian ini bertujuan menganalisis pengaruh penambahan tepung jagung terhadap stabilitas dan permeabilitas campuran aspal porus. Penelitian menggunakan metode eksperimental dengan kadar aspal optimum (KAO) sebesar 4,5% dan variasi tepung jagung sebesar 0–2,5%. Hasil penelitian menunjukkan bahwa stabilitas tertinggi sebesar 821 kg diperoleh pada variasi 2,5%, namun nilai Void in Mix (VIM) tidak memenuhi standar AAPA (2004). Variasi 2,0% menghasilkan stabilitas sebesar 807 kg dengan nilai VIM 18,05% yang memenuhi standar, sehingga direkomendasikan sebagai campuran aspal modifikasi. Variasi 0,5% memberikan kinerja permeabilitas terbaik dengan waktu aliran 10,67 detik/liter dan koefisien permeabilitas 0,49 cm/s. Secara keseluruhan, seluruh variasi memenuhi persyaratan permeabilitas menurut AAPA (2004).   Kata kunci: aspal porus, tepung jagung, stabilitas, permeabilitas, VIM.     Abstract   porous asphalt mixtures. An experimental method was employed, with an optimum asphalt content (OAC) of 4.5%. Corn starch extract was added at 0%, 0.5%, 1.0%, 1.5%, 2.0%, and 2.5%. The results indicated that corn starch extract improved the performance of porous asphalt mixtures. The highest stability (821 kg) was obtained at 2.5%, although its Void in Mix (VIM) did not meet the AAPA (2004) specification. The 2.0% mixture achieved a stability of 807 kg and a VIM of 18.05%, satisfying the AAPA (2004) standard. Therefore, the addition of 0.5–2.0% corn starch extract is recommended for modified porous asphalt. The 0.5% mixture showed the best permeability performance, with the shortest flow time (10.67 s/L) and a permeability coefficient of 0.49 cm/s. Overall, all mixtures met the permeability requirements of the AAPA (2004) standard.   Keywords: porous asphalt, corn starch, stability, permeability, VIM.
A Analisis Perbandingan Respons Dinamis Struktur Boat Landing Offshore Platform Menggunakan Metode Working Stress Design dan Load and Resistance Factor Design Yovi Chandra; Fadhliani Fadhliani; Nur Wijaya Ningsih
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1363

Abstract

Abstrak   Boat landing merupakan struktur tambahan pada offshore platform untuk sandaran kapal yang mampu menahan beban dinamis lingkungan laut dan potensi tubrukan. Untuk meminimalisir risiko kegagalan, evaluasi struktural dilakukan meliputi analisis in-place (statis), dinamis, dan fatigue (kelelahan beban berulang). Analisis ini membandingkan metode Working Stress Design (WSD) dan Load and Resistance Factor Design (LRFD) menggunakan pemodelan SACS melalui time history analysis untuk parameter displacement, velocity, dan acceleration. Hasil Analisis in-place menunjukkan semua elemen memenuhi batas unity check. Pada beban Kondisi lingkungan, LRFD menghasilkan respons dinamis ± 2% lebih besar dari WSD dan pada tumbukan kapal, LRFD memberi displacement dan acceleration lebih besar (2% dan 0,1%), meskipun velocity 0,3% lebih rendah. Analisis fatigue mendeteksi empat member gagal mencapai target umur rencana. Kesimpulannya, metode LRFD menghasilkan respons dinamis 2% lebih konservatif dibanding WSD, tetapi seluruh elemen tetap aman secara statik. LRFD lebih direkomendasikan karena memberikan margin keamanan optimal tanpa over-design, dengan syarat empat elemen kritis diperkuat agar memenuhi target umur lelah (fatigue)   Kata kunci: Boat Landing Offshore Platform, In-place, Respons Dinamis, Fatigue, WSD, LRFD.   Abstract   A boat landing is an auxiliary structure on an offshore platform that facilitates vessel berthing and must withstand dynamic environmental loads and potential ship impacts. This study evaluates and compares the structural performance of boat landing structures designed using the Working Stress Design (WSD) and Load and Resistance Factor Design (LRFD) methods through in-place, dynamic, and fatigue analyses conducted in SACS. Dynamic responses were assessed using time history analysis based on displacement, velocity, and acceleration. The results indicate that all structural members satisfy the unity check requirements under both design approaches. Under environmental loading, LRFD produces dynamic responses up to 2% higher than WSD. In ship impact scenarios, LRFD yields slightly greater displacement and acceleration responses, while velocity is marginally lower. Fatigue analysis reveals that four structural members fail to meet the target design life. Overall, LRFD provides a more conservative dynamic response and is recommended, provided that strengthening is applied to the identified critical members.   Keywords: Boat Landing Offshore Platform, In-place Analysis, Dynamic Response, Fatigue, WSD, LRFD
The Evaluasi Kinerja Campuran Aspal RAP 100% Menggunakan Waste Engine Oil Sebagai Bahan Peremaja dan GGBFS Sebagai Filler Hermon Frederik Tambunan; Bernaditha Catur Marina; Muhammad Delfi Mulia Rachman Hasibuan
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1374

Abstract

Abstrak   Penggunaan 100% Reclaimed Asphalt Pavement (RAP) pada campuran aspal panas menawarkan potensi besar dalam penghematan material dan pengurangan dampak lingkungan, namun terhambat oleh penuaan binder yang meningkatkan kekakuan dan kerentanan terhadap retak. Kajian kombinasi bahan peremaja berbasis limbah dengan filler industri pada campuran 100% RAP masih sangat terbatas. Penelitian ini mengevaluasi pengaruh sinergis Waste Engine Oil (WEO) sebagai peremaja dengan variasi 0%, 5%, 10%, 15%, dan 20%, serta Ground Granulated Blast Furnace Slag (GGBFS) sebagai filler dengan variasi 0%, 25%, 50%, 75%, dan 100% terhadap kinerja campuran 100% RAP. Pengujian dilakukan menggunakan metode Marshall (ASTM D6927) dan Indirect Tensile Strength/ITS (ASTM D6931) pada 99 sampel. Hasil menunjukkan WEO meningkatkan fleksibilitas campuran, sedangkan GGBFS meningkatkan stabilitas dan Marshall Quotient (MQ). Nilai VIM menurun seiring penambahan WEO dan GGBFS, sementara VMA memenuhi batas standar. Kinerja optimum dicapai dengan kombinasi 10% WEO dan 100% GGBFS dengan stabilitas 704,90 kg, MQ 321,73 kg/mm, flow 2,4 mm, dan ITS 716,32 kPa, meningkat 44,8% dibandingkan dengan campuran tanpa GGBFS.   Kata kunci: RAP, WEO, GGBFS, Uji Marshall, Peremaja, Volumetrik, ITS   Abstract   The use of 100% Reclaimed Asphalt Pavement (RAP) in hot-mix asphalt offers significant potential for material conservation and environmental sustainability, yet is constrained by binder ageing that increases brittleness and susceptibility to cracking. Studies on combined waste-based rejuvenators and industrial by-product fillers in100% RAP mixtures remain limited. This study evaluates the synergistic effect of Waste Engine Oil (WEO) as a rejuvenator at dosages of 0%, 5%, 10%, 15%, and 20%, and Ground Granulated Blast Furnace Slag (GGBFS) as a filler at subsitution levels of 0%, 25%, 50%, 75%, and 100% RAP mixture performance. Tests were conducted using the Marshall method (ASTM D6927) and indirect tensile strength/ITS (ASTM D6931) on 99 specimens. WEO increased mix flexibility indicated by higher flow values, while GGBFS improved stability and Marshall Quotient (MQ). VIM decreased as WEO and GGBFS content increased, while VMA met the standard thresholds. Optimum performance was obtained at 10% WEO and 100% GGBFS, yielding stability of 704.90 kg, MQ of 321.73 kg/mm, a flow of 2.4 mm, and an ITS of 716.32 kPa, a 44,8% improvement over the mixture without GGBFS. Keywords: RAP, WEO, GGBFS, Marshall test, Rejuvenator, Volumetric, ITS
Analisis Implemetasi LPS Pada Proyek Konstruksi dengan Menggunakan Aplikasi Primavera P6 Pada Tahap Pelaksanaan Noorma Putri Rajati; Kezia Micelle Permata Harsono; Hermawan Hermawan; Felix Hidayat
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1376

Abstract

Abstrak   Keterlambatan pelaksanaan proyek konstruksi menjadi permasalahan utama yang berdampak pada penurunan produktivitas, dan ketidaktercapaian target waktu. Salah satu penyebab utama keterlambatan adalah lemahnya koordinasi, dan rendahnya keandalan perencanaan kerja mingguan. Penelitian ini bertujuan menganalisis implementasi Last Planner System dengan Primavera P6 dan membandingkan kinerjanya dengan metode penjadwalan konvensional pada tahap pelaksanaan proyek. Studi kasus dilakukan pada Proyek Gedung Mal yang berlokasi di Kota Semarang, dengan fokus pada pekerjaan struktur atas lantai 3 dan lantai 4. Metode penelitian yang digunakan adalah pendekatan kuantitatif dengan analisis deskriptif. Data penelitian berupa Kurva S, BoQ, laporan mingguan, dan data tenaga kerja yang diperoleh dari manajemen konstruksi proyek. Data tersebut diolah menggunakan aplikasi Primavera P6 untuk menyusun master schedule, phase schedule, look ahead plan, dan weekly work plan. Evaluasi kinerja penerapan Last Planner System dilakukan melalui analisis Percent Plan Complete, deviasi terhadap baseline, dan efisiensi waktu pelaksanaan, kemudian dibandingkan dengan metode konvensional. Hasil penelitian menunjukkan bahwa penerapan Last Planner System dengan Primavera P6 mampu meningkatkan keandalan perencanaan dan efektivitas pengendalian proyek. Nilai Percent Plan Complete rata-rata yang diperoleh sebesar 86,4%, menunjukkan tingkat ketercapaian rencana kerja mingguan berada pada kategori baik, sesuai dengan standar Last Planner System yang menyatakan Percent Plan Complete di atas 70% sebagai indikator perencanaan yang andal. Selain itu, terjadi efisiensi waktu pelaksanaan sebesar 2 minggu pada lantai 3 dan 1 minggu pada lantai 4 dibandingkan dengan baseline jadwal konvensional. Berdasarkan hasil, disimpulkan bahwa kolaborasi antara Last Planner System dan Primavera P6 berkontribusi mengurangi pemborosan waktu pelaksanaan, dan memperbaiki kinerja perencanaan proyek konstruksi.   Kata kunci:  Last Planner System, Primavera P6, penjadwalan proyek, Percent Plan Complete   Abstract   Delays in the implementation of construction projects remain the main problems affecting declining productivity and the failure to meet time targets. One of the main causes of these delays is poor coordination and low reliability of weekly work planning. This study aims to analyze the implementation of Last Planner System in Primavera P6 and compare its performance with conventional scheduling methods during project implementation. The case study was conducted on the Mall Building Construction Project in Semarang City, focusing on the upper structure of the 3rd and 4th floors. The research method used is a quantitative approach with descriptive analysis. The research data are in the form of S-curves, BoQs, weekly reports, and labor data obtained from project construction management. The data was processed using the Primavera P6 application to compile a master schedule, a phase schedule, a look-ahead plan, and a weekly work plan. The performance of Last Planner System implementation was evaluated through Percent Plan Complete analysis, deviation from baseline, and implementation time efficiency, and then compared with conventional methods. The results of the study show that implementing Last Planner System with support from Primavera P6 can increase the reliability of planning and the effectiveness of project control. The average Percent Plan Complete value was 86.4%, indicating that the weekly work plan achievement is in the good category, in accordance with the Last Planner System standard, which states that a Percent Plan Complete above 70% is a reliable planning indicator. In addition, the efficiency was 2 weeks on the 3rd floor and 1 week on the 4th floor compared to the conventional-schedule baseline. Based on these results, it can be concluded that the collaboration between Last Planner System and Primavera P6 contributes to reducing waste of implementation time and improving the performance of construction project planning.   Keywords: Last Planner System, Primavera P6, project scheduling, Percent Plan Complete
Perancangan Pekerjaan Oprit Proyek Flyover Sekip Ujung Palembang Menggunakan Timbunan Mortar Busa Andar Irianto; Dewi Amalia; Trihanyndio Rendy Satrya
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1398

Abstract

Abstrak   Timbunan ringan mortar busa biasanya digunakan pada kondisi dasar tanah yang lunak. Saat ini, timbunan ringan juga banyak digunakan sebagai pengganti timbunan tanah, salah satunya pada oprit flyover di area perkotaan. Oleh karena itu, penelitian ini menghitung stabilitas timbunan ringan mortar busa pada kondisi normal dan kondisi gempa saat diterapkan pada oprit flyover. Material penyusun timbunan ringan ini terdiri atas pasir, semen, air, dan busa. Stabilitas timbunan oprit flyover dengan material mortar busa ini dianalisis menggunakan software Plaxis berdasarkan SNI 8460:2017 tentang Persyaratan Perancangan Geoteknik hingga mencapai faktor keamanan yang memenuhi persyaratan. Hasil analisis menunjukkan bahwa stabilitas timbunan mortar busa memiliki faktor keamanan sebesar 5,99 dan 2,72 pada abutment 1 dan 2 dalam kondisi normal, serta 3,73 dan 1,63 dalam kondisi gempa. Sementara itu, analisis penurunan menghasilkan nilai sebesar 0,49 cm dan 0,39 cm. Nilai tersebut menunjukkan bahwa faktor keamanan timbunan ringan pada oprit flyover ini masuk dalam kategori aman.   Kata kunci: Timbunan ringan, mortar busa, faktor keamanan     Abstract   Lightweight foam mortar fill is typically used on soft soil foundations. Currently, lightweight fill is also widely used as a substitute for soil fill, particularly on flyover ramps in urban areas. Therefore, this study calculates the stability of lightweight foam mortar fill under normal and seismic conditions when applied to flyover ramps. The materials comprising this lightweight fill consist of sand, cement, water, and foam. The stability of the flyover approach embankment using this foam mortar material was analyzed using Plaxis software in accordance with SNI 8460:2017 on Geotechnical Design Requirements until a safety factor meeting the specifications was achieved. The analysis results show that the stability of the foam mortar fill has safety factors of 5,99 and 2,72 at abutments 1 and 2 under normal conditions, and 3,73 and 1,63 under seismic conditions. Meanwhile, the settlement analysis yielded values of 0,49 cm and 0,39 cm. These values indicate that the safety factor for the lightweight fill on this flyover ramp falls within the safe category.   Keywords: lightweight fill, foam mortar, safety factors
Analasis Komparatif Performa Termal dan Akustik Dinding Sandwich Panel Glassfiber Reinforced Concrete (GRC) Terhadap Dinding Bata Pada Bangunan Andri Irfan Radifan; Glory Beam Lim; Joewono Prasetijo
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1417

Abstract

Abstrak   Penelitian ini bertujuan menganalisis secara komparatif performa termal dan akustik dinding Sandwich Panel Glass Fiber Reinforced Concrete (GRC) dibandingkan dengan dinding bata konvensional bangunan di iklim tropis lembap Indonesia. Metode penelitian menggunakan pendekatan kuantitatif eksperimental yang dikombinasikan dengan survei kuesioner terhadap 120 responden yang terdiri dari penghuni bangunan, arsitek, dan insinyur berpengalaman. Pengukuran performa termal menggunakan Thermometer Hygrometer dan pengukuran akustik menggunakan Sound Noise Level Meter selama 30 hari pada dua unit bangunan percontohan di Batam, Tanjung Uma. Hasil penelitian menunjukkan bahwa dinding Sandwich Panel GRC memiliki nilai koefisien konduktivitas termal (k) sebesar 0,42 W/m·K, lebih rendah 38,2% dibandingkan bata merah (0,68 W/m·K). Nilai transmisi suara (STC) dinding GRC mencapai 42 dB, lebih tinggi 16,7% dibandingkan bata merah (36 dB). Survei menunjukkan 78,3% responden menyatakan lebih nyaman pada ruang dengan dinding GRC. Sandwich Panel GRC merupakan alternatif material dinding unggul untuk bangunan tropis dari aspek efisiensi energi dan kenyamanan akustik.   Kata kunci: Sandwich Panel GRC, Bata Merah, Performa Termal, Akustik Bangunan, Bangunan Tropis, Konduktivitas Termal     Abstract   This study aims to comparatively analyze the thermal and acoustic performance of Glass Fiber Reinforced Concrete (GRC) Sandwich Panel walls versus conventional brick walls in buildings in Indonesia's humid tropical climate. The research employs a quantitative experimental combined with questionnaire surveys of 120 respondents. Thermal performance measurements were conducted using a Thermometer Hygrometer and acoustic measurements using a Sound Noise Level Meter over 30 days at two prototype buildings in Batam, Tanjung Uma. Results indicate that GRC Sandwich Panel walls have a thermal conductivity coefficient (k) of 0.42 W/m·K, which is 38.2% lower than red brick (0.68 W/m·K). The Sound Transmission Class (STC) of GRC walls reached 42 dB, 16.7% higher than red brick (36 dB). Surveys showed that 78.3% of respondents reported greater comfort in rooms with GRC walls. GRC Sandwich Panels represent a superior wall material alternative for tropical buildings in terms of energy efficiency and acoustic comfort.   Keywords: GRC Sandwich Panel, Thermal Performance, Building Acoustics, Tropical Buildings, Thermal Conductivity
Efek Volume Limbah Plastik Acrylonitrile Butadiene Styrene (ABS) Terhadap Properti Mekanis Beton Normal Mega Nospita Matana; Cecilia Lauw Giok Swan
Teras Jurnal : Jurnal Teknik Sipil Vol 16 No 2 (2026): Teras Jurnal (September 2026)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i2.1405

Abstract

Abstrak   Pemanfaatan limbah plastik keras sebagai campuran agregat beton adalah salah satu solusi permasalahan lingkungan akibat terus bertambahnya volume limbah plastik. Penelitan ini memanfaatkan limbah plastik dengan jenis acrylonitrile butadiene styrene (ABS) sebagai subtitusi parsial agregat kasar pada campuran beton normal berdasarkan volume absolut total (15, 30 dan 40%). Penelitian eksperimental dilakukan untuk mengetahui pengaruh persentase plastik ABS terhadap properti mekanis beton normal baik dalam kondisi beton segar maupun beton keras (umur 7, 14 dan 28 hari). Untuk beton segar, properti mekanis yang ditinjau adalah nilai slump dan berat isi. Hasil pengujian menunjukkan bahwa terjadi reduksi seiring dengan peningkatan persentase plastik ABS yang digunakan. Pada umur beton keras, dilakukan pengujian dan analisis pengaruh persentase plastik ABS pada berat isi, kekuatan tekan, kekuatan tarik belah dan kekuatan lentur.  Pada umur beton keras, hasil analisis menunjukkan bahwa berat isi dan kekuatan beton semakin tereduksi.   Kata kunci: beton, plastic ABS, property mekanis beton       Abstract   The use of hard plastic waste as concrete ix aggregate is one of the environmental problems solutions which are caused by increasing of plastic waste volume. This study utilize plastic wastes acrylonitrile butadiene styrene (ABS) as partial replacement for coarse aggregates in concrete mix according to total of absolute volume (15, 30 dan 40%). The experimental study were performed to analyze the effect of ABS plastic percentage to mechanical properties of normal concrete in both of fresh and hardened states (7, 14 and 28-days). For fresh concrete, mechanical properties, which were investigated, workability and density. Test results indicate a reduction in both properties as the p ABS plastic percentage used increases. For hardened concrete, this study investigated the effect of plastic waste on density, compressive, splitting tensile and flexural strength of concrete. It is concluded that density and strength of concrete decreased by increasing the percentage of plastic waste.   Keywords: concrete, ABS plastic, concrete mechanical properties

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