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All Journal TEKNIK Rotasi MEDIA KOMUNIKASI TEKNIK SIPIL JURNAL KARYA TEKNIK SIPIL Al-Jami'ah: Journal of Islamic Studies Semesta Teknika Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Journal of Geoscience, Engineering, Environment, and Technology Teras Jurnal Turbo : Jurnal Program Studi Teknik Mesin BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks Indonesian Journal of Islamic Literature and Muslim Society Rang Teknik Journal SIKLUS: Jurnal Teknik Sipil Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Adabiyyat: Jurnal Bahasa dan Sastra Journal of Mechanical Engineering The International Conference on Education, Social Sciences and Technology (ICESST) Eduvest - Journal of Universal Studies Warta LPM Jurnal Teknik Sipil
Sukamta Sukamta
Departemen Teknik Sipil FT. UNDIP Jl. Prof. H. Soedarto SH., Tembalang, Semarang 50275
Religion Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Neuroscience Physics Social Sciences Transportation Other

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Claim Extension of Time and Prolongation Cost Management Using The Last Planner System Method Wicaksono, Dwi Aji; Hermawan, Ferry; Sukamta, Sukamta
Eduvest - Journal of Universal Studies Vol. 5 No. 6 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i6.51273

Abstract

This study addresses the challenges faced by service providers in construction projects, particularly in dealing with changes in work that may affect the project’s timeline and cost. Changes can introduce risks of loss, especially when claims for extension of time (EOT) and additional costs incurred due to prolongation are not properly approved by the Employer. Failure to submit a valid claim for EOT and prolongation costs can result in substantial financial losses for the service provider. The research aims to develop a method for effectively managing these risks by integrating the output of the Last Planner System (LPS) into the administrative support data for claims. This method is used to calculate delay events and create a structured, reliable claim evidence document. The findings suggest that using the LPS framework can help construction managers systematically document and justify delays and cost impacts, thereby improving the likelihood of claim approval. This approach can enhance the efficiency of claims management and reduce financial risks for service providers. The study’s implications highlight the importance of proactive planning and proper documentation in managing construction project risks, emphasizing the need for robust administrative systems to support claims for delays and associated costs.
EVALUASI PENGARUH TIMBUNAN DAN STOCKYARD PANCANG TERHADAP KEGAGALAN PANCANG (STUDI KASUS: PROYEK JEMBATAN X DI KALIMANTAN) Matheus, Patrick; Hartono, Darwin; Sukamta, Sukamta; Sadono, Kresno Wikan
Rang Teknik Journal Vol 8, No 2 (2025): Vol. 8 No. 2 Juni 2025
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v8i2.6722

Abstract

One of the bridge projects in Kalimantan is built on soft soil. Soft soil has poor bearing capacity, low shear strength and permeability, and high compressibility. One of the substructures of the bridge project, consisting of two spun pile points, experienced failure (exceeding the allowable inclination, indications of breakage at a depth of -8,000 mm, and failure to achieve the planned bearing capacity). The failure occurred after excavation for the pile cap was carried out.The additional load from preloading embankments and a spun pile stockyard, located 20,000 mm and 15,000 mm away, caused lateral deformation in the existing soil. This lateral deformation influenced additional deformation and bending moments in the failed spun piles. An evaluation of the additional load on the spun piles was conducted using the Finite Element Method with Plaxis 2D software. The additional load from the preloading embankments and stockyard was analyzed to determine its impact on the spun piles.The analysis showed that the additional load from the preloading embankments and stockyard caused lateral deformation, leading to deformation and bending moments in the spun piles. However, this additional load alone was not sufficient to cause failure in the spun piles.
Safety Evaluation of Rockfill Dam Based on Seepage Discharge Data Sulistya, Krisna; Sachro, Sri Sangkawati; Sukamta, Sukamta
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 8, No 1 (2023): EDISI MARET 2023
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v8i1.3730

Abstract

The leading cause of failure of an embankment dam is the occurrence of excessive seepage, which triggers piping that can disrupt the stability and safety of the dam. This study discusses the dam's safety against the danger of seepage with a case study of the Jatibarang Dam. The safety evaluation uses V-notch monitoring data during the operational period from 2018 to 2021. The highest seepage discharge recorded during that period was 2,232 lt/sec/m, where the unsafe threshold for seepage based on the dam's height was 0,56 lt/sec/m, so seepage is unsafe. Meanwhile, based on the seepage discharge index (QI) calculation, the QI value is less than one, so the seepage discharge is still safe. Evaluating dam safety against excessive seepage discharge for dams of the same type as the Jatibarang Dam is more appropriate to use the seepage discharge index (QI) threshold because the parameters in the equation are complete.ABSTRAKPenyebab utama kegagalan suatu bendungan tipe urugan adalah terjadinya rembesan berlebih yang memicu piping yang dapat mengganggu kestabilan dan keamanan bendungan. Penelitian ini membahas keamanan bendungan terhadap bahaya rembesan dengan studi kasus Bendungan Jatibarang.  Evaluasi keamanan menggunakan data pemantauan V-notch selama masa operasional tahun 2018 sampai dengan 2021. Debit rembesan tertinggi yang tercatat pada kurun waktu tersebut sebesar 2,232 lt/dt/m, dimana ambang batas tidak aman terhadap rembesan berdasarkan ketinggian bendungan adalah 0,56 lt/dt/m sehingga rembesan dalam kondisi tidak aman. Sedangkan berdasarkan perhitungan indeks debit rembesan (QI) menghasilkan nilai QI kurang dari satu sehingga debit rembesan masih dalam kondisi aman. Evaluasi keamanan bendungan terhadap debit rembesan berlebih terhadap bendungan yang se-tipe Bendungan Jatibarang lebih tepat menggunakan ambang batas indeks debit rembesan (QI) karena parameter pada persamaannya lebih lengkap.
Masalah Test dalam Psikologi dan Pendidikan Sukamta, Sukamta
Al-Jami'ah: Journal of Islamic Studies No 19 (1978)
Publisher : Al-Jami'ah Research Centre

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/ajis.1978.019.26-61

Abstract

Dalam kesempatan ini, kami mencoba membahas tentang test  dalam Psikologi dan Pendidikan, dengan maksud antara lain: Ingin memperkenalkan dan mempopulerkan tentang test dalam psikologi dan Pendidikan, dengan sedikit seluk-beluk yang melingkupinya.Untuk lebih mempopulerkan penggunaan test sebagai alat yang lebih baik untuk mengetahui “human ability and traits” sebagaimana yang terjadi di negara-negara yang telah maju.Untuk merangsang para pecinta dan pemakai alat test, agar supaya berhati-hati, bijaksana dan tidak gegabah dalam menggunakan alat-alat test, sehingga normative dan kerahasiannya dapat terjamin.Kita hendak membangun dan mengembangkan psikologi ditanah air kita; karena boleh dikata bidang ini hamper sama sekali belum terjamah, dan masih mengimport teori-teori dari luar negeru, yang sering kurang sesuai dengan kondisi tanah air kita.Kita hendak meningkatkan suatu test yang telah ada sekarang ini serta berusaha Menyusun test yang telah ada sekarang ini serta berusaha Menyusun test yang baru untuk memenuhi kebutuhan dan permintaan yang selalu meningkat.Dal ini kami kemukakan, karena ternyata perkembangan alat-alat test di Indonesia, tidak semacam lajunya dibandingkan dengan perkembangan alat-alat test di negara-negara yang telah maju, seperti Amerika, Inggris, Belanda, dan negara-negara Barat lainnya.
Implementation of the Smart & Green Building Concept in the UMY Student Dormitory Building Sukamta, Sukamta; Jamal, Agus; Utama, Nafi Ananda; Suryanto, Rudy; Subandono, Bagus; Budiyanto, Gunawan; Suryanto, Arwan
Berdikari: Jurnal Inovasi dan Penerapan Ipteks Vol. 13 No. 2: August 2025
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/berdikari.v13i2.28064

Abstract

The design of student housing in the modern era is not only required to provide functional comfort but also to address the challenges of energy efficiency and environmental sustainability. Universitas Muhammadiyah Yogyakarta (UMY) responds to these needs through the development of a Student Dormitory that adopts the principles of smart and green building. The purpose of this community engagement program is to evaluate the implementation of intelligent and environmentally friendly building concepts from technical, functional, and operational economic perspectives. This program employs a case study method with a descriptive qualitative approach, based on the analysis of building technical documents and a review of relevant national and international scientific literature. The findings show that the integration of digital access control systems (smart access), energy-efficient VRV (Variable Refrigerant Volume) cooling, harmonic filters, solar water heaters, and the use of Panasap Blue Glass has significantly contributed to reducing energy consumption by up to 40%. In addition to enhancing residents’ comfort and security, these technologies also demonstrate potential investment payback within 5 to 7 years. The implications extend beyond cost and operational efficiency, contributing directly to the achievement of the Sustainable Development Goals (SDGs). Furthermore, this program is grounded on the principle of sustainability, emphasizing the long-term utilization of eco-friendly technologies, the principle of benefit, ensuring tangible advantages for students, the university, and the wider community through improved quality of life and reduced carbon footprint; and the principle of economic viability, guaranteeing operational cost efficiency and financial sustainability of the project. The strategic objectives of this community engagement initiative are (1) to establish UMY’s Student Dormitory as a model of environmentally conscious student housing in tropical regions, (2) to promote knowledge and technology transfer on smart and green buildings to other universities, (3) to strengthen UMY’s reputation as a modern campus aligned with the SDGs agenda, and (4) to create an energy-efficient housing ecosystem that contributes to long-term cost savings and improved residents’ well-being. In conclusion, the study indicates that UMY’s student housing model, based on smart and green building principles, is feasible to adopt as a reference for dormitory development in other higher education institutions, particularly in tropical areas
PENGGUNAAN PCC SEBAGAI SUBTITUSI OPC PADA BETON RIGID PAVEMENT DAN PENGARUHNYA TERHADAP MUTU DAN WAKTU IKAT AWAL SEMEN Dianugrah, Rizki; Sukamta, Sukamta; Ay Lie, Han
JURNAL TEKNIK SIPIL Vol 12, No 2 (2023): Volume 12 Nomor 2 November 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v12i2.31182

Abstract

Portland Composite Cement or PCC is an eco-friendly material that has been registered as a green product. In order to support green construction, the use of PCC has begun to be developed, including rigid pavement for road construction in Indonesia. Things that need to be investigated from the use of PCC are the compressive strength and flexural strength behavior for certain rigid pavement concrete qualities and the initial setting time of cement. The use of PCC which is still in the development stage needs to be investigated by substituting it with Ordinary Portland Cement (OPC). In this study, there were 6 variations of substitution, namely 100% OPC, 20% OPC and 80% PCC, 40% OPC and 60% PCC, 60% OPC and 40% PCC, 20% OPC and 80% PCC, and 100% PCC. . The results of the test using the vicat, the higher the proportion of PCC, the lower the normal consistency, so that the less water content is required for the hydration reaction between cement and water to occur. Meanwhile, the higher the proportion of PCC, the higher the initial setting time, so that the cement setting time is slower. In testing the compressive strength of concrete, the higher the proportion of PCC at the age of 28 days, the compressive strength of the concrete tends to decrease. In testing the flexural strength of concrete, the higher the proportion of PCC at the age of 7 days, 14 days and 28 days, the flexural strength of the concrete tends to decrease. Based on the research results, concrete with a higher proportion of OPC has a higher compressive strength and flexural strength than concrete with a higher PPC mixture.
Co-Authors Adi Putra, Kukuh Cahya Aditya Sage Pamungkas Agus Jamal Agus Suprihanto Agus Winarno, Agus Agustina, Nurhaliza Aliputa, Henu Satya Ami tri Fatrin Anderika Pradhita Andru Fajar Febrianto Andryan Mistavhirul P Angga Alfiannur Alfiannur Ari Dwiearto, Hasan Asy Arif Hidayat As’ari, Muhammad Agung Asshidiqie, Muhammad Rony Atikasari, Tiara Cahya Ay Lie Han Ay Lie, Han Bagus Acung Bilahi Baharudin, Irfan Bobby Rio Indriyantho Budi Rohmad Wijayanto Budiyantoro, Cahyo Caroko, Novi Darwin Hartono Dedet Hermawan Setiabudi, Dedet Hermawan Dianugrah, Rizki Dimas Prasetyo Nugroho Doni Apriadi Putera Dwi Aries Himawanto Elfrida Gresih Lumbantobing Erista, Dicky Fajar Wahyu Putranto Ferry Hermawan Fitri Wahyuni Galih Widyarini Gunawan Budiyanto Han Ay Lie Han Ay Lie Harahap, Yudani Alamsyah Hardi Wibowo Hardi Wibowo Hari Nugroho Hazim, Muhammad Fadhlurrahman Himawan Indarto Holyness Nurdin Singadimedja Husda, Syamsul Muarif Ilham Abadi, Ilham Ilham Nurhuda Inabah, Redha Fatki Indarto Indarto Indrastono Dwi Atmanto Intan Fitriani Junaedi Utomo Kamiel, Berli Paripurna Kamila Shaomi Nazila Khrisnawan Arief Wicaksono Kresno Wikan Sadono Krisna Harimurty Kuni Saadati Lisatia Dian Pithaloka Listiyono Budi Liza Azizah M. Yudi Purnawan Maemunah Mashuri Amin D. Muhammad Razi Muzthohidun, Muhammad Nasmiarta, Zhafarina Malaha Nauval Rabbani Nicolaus Iyowau Nugroho, Dedy Melianto Nuroji Nuroji Nurrahman, Budi Parang Sabdono Parang Sabdono Parang Sabdono Patrick Matheus Permana, Agung Pratama, Sadewa Eka Purnomo Purnomo Purwanto Purwanto Purwanto Purwanto R Dian Chintami R.Risang Haryo C.D. Rini Marlina, Rini Rudi Yuniarto Adi Rudy Suryanto, Rudy S. Wisnu B. Sanggabuana Satria K Septesen Nababan Shomad, Muhammad Abdus Sidqi Muhammad Siti Hardiyati Sri Sangkawati Sachro Sri Tudjono Sri Tudjono Subandono, Bagus Sudarja Sudarja Sudarja, Sudarja Suharyanto Sulistya, Krisna Suprapto Suprapto Suryanto, Arwan Susilo Adi Widyanto Syaiful Anshari Thoharudin, Thoharudin Tri Agung Rohmat Tri Agung Rokhmat, Tri Agung Triana Setianingrum Tunggal Bagas Yuliawan Utama, Nafi Ananda Utomo, Jati Wicaksono, Dwi Aji Widyasmoro, Widyasmoro Windu Partono Yudo Prasetyo Yulfyandika Manggala Putra Yulita Arni Priastiwi Yurianto Yurianto