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All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Jurnal Teknik Sipil IPTEK Journal of Proceedings Series Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Jurnal Teknologi Lingkungan Lahan Basah
Erwin Sutandar
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Immunology & microbiology Public Health Transportation

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THE INFLUENCE OF THE VARIATION IN ARCH HEIGHT OF THE MAIN TAYAN BRIDGE ON THE MEMBER FORCES Lusiana, Lusiana; Elvira, Elvira; Yusuf, Muhammad; Sutandar, Erwin; Supriyadi, Asep
Jurnal Teknik Sipil Vol 23, No 4 (2023): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i4.66968

Abstract

The height of the bridge arch significantly impacts the strength and structural efficiency. Research on the height of the Tayan Bridge arch was conducted to determine the values and behaviour of member forces, structural weight, and deflection and to design the optimal arch height geometry. This research involved five variations of the arch height. The bridge structure was modelled using AutoCAD software. Relevant bridge loading data based on the SNI 1725-2016 standard was inputted into AutoCAD for structural design, and then the structure was modelled and analysed using SAP2000. The analysis results provided information on the bridge weight, deflection, and member forces. The analysis results were then compared with the bridge arch height, and this comparison was presented in the form of graphs. From the analysis results, it can be concluded that the bridge arch height has a positive linear relationship with the bridge weight. Tensile and compressive forces exhibit opposite behaviour. Increasing the arch height with constant value results in weight, deflection, and member force variations. Constantly expanding the arch height also does not lead to an increase in the stiffness of the bridge. Structurally, the optimal arch height is 42.134 meters.
The Effect of Coarse Aggregate Size On Pervious Concrete Mixture Erwin, Sutandar; Asep, Supriyadi; M, Indrayadi; Ferry, Juniardi; Syahrudin, Syahrudin
Jurnal Teknik Sipil Vol 22, No 1 (2022): JURNAL TEKNIK SIPIL EDISI JUNI 2022
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v22i1.55159

Abstract

 Along with the development progress in Indonesia, it causes the reduction of green areas. Coupled with the lack of public awareness of the environment is a problem that must be considered. Pervious concrete that be as one of the solutions in pavement construction, concrete sheet piles, retaining walls is a product that can be considered successfully in meeting expectations as an environmentally friendly construction. For road pavement, pervious concrete must have a strength of 30 MPa. Therefore, there is a need for research for the mix design of pervious concrete using the ACI 522R-10 Report on Pervious Concrete method with an initial design compressive strength of 25 MPa. The method is to vary the coarse aggregate used in the pervious concrete mixture. In this research, it is divided into 5 variations to find a mixture that is in accordance with the plan or which exceeds the initial plan, and its permeability still meets the requirements for pervious concrete. Testing of the specimens includes the volume weight test, compressive strength, split tensile strength, modulus of elasticity of concrete, porosity, absorption, and permeability. From the research, the results of the volume weight of pervious concrete are 1,974.14 - 2,187.83 kg/m3 that pervious concrete is included in the lightweight concrete group due to it has a weight below 2,200 kg/m3 . The average compressive strength of pervious concrete is 20.089 "“ 46.978 MPa. The value of the split tensile strength of pervious concrete is 8,968-19,127 MPa. The average value of porosity is between 8,307 "“ 13,097%. The average value of absorption is between 3.452 "“ 5.444%. The average value of the permeability is between 0.0025-0.487 cm3/sec. From this research, it can be concluded that the use of different coarse aggregates size will produce pervious concrete with different compressive strengths. The compressive strength with aggregate size 0.5x0.5 without sieving, it closed to the initial plan of 27.72 MPa, whereas the highest compressive strength is for a mixed aggregate size of 1/1 and 0.5/0.5 cm with sieving that the compressive strength achieved 46.978 MPa
STUDY OF THE EFFECT OF MINERAL ADMIXTURE ADDITION ON PAVING BLOCKS' PHYSICAL AND MECHANICAL PROPERTIES lo, Hansen; Sutandar, Erwin; Budi, Gatot Setya
Jurnal Teknik Sipil Vol 24, No 2 (2024): Vol 24, No 2 (2024): JURNAL TEKNIK SIPIL EDISI MEI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i2.76545

Abstract

Paving blocks, concrete bricks made from cement and sand, are a vital alternative to ground cover. Their extensive, precast nature, water absorption capabilities, affordability, and ease of use contribute to their popularity. However, the additional ingredients, particularly mineral admixtures, hold the potential to enhance these blocks' quality and performance significantly. The mineral admixtures used, such as limestone, quartz sand, and gypsum, are instrumental in improving the performance of paving blocks, offering a promising avenue for further research and application. This research, conducted with meticulous scientific rigor, investigated paving blocks' physical and mechanical properties. Paving block test objects were created using sand, cement, and crushed stone with mineral admixtures. The mineral admixtures used in this experiment, including gypsum, quartz sand, and limestone, were crushed before being used in a stone cruiser machine to make them powder and reactive. Compressive strength test, weat resistance test, volume weight test, water absorption test, and visual inspection were conducted experimentally. The research results, derived from a robust experimental setup, revealed that paving blocks with 10% gypsum additives, 6% quartz sand powder, and limestone powder produced a more excellent compressive strength value than standard paving blocks, values of 36,884 MPa, 37,573 MPa, and 38,950 MPa with a regular paving block compressive strength value of 36,119 MPa followed by a decrease in the percentage of absorption. This suggests that using mineral admixtures at a certain percentage as an additional material can improve the quality of paving blocks. However, it is essential to note that adding too many mineral admixtures can also decrease the strength of the paving block, emphasizing the need for careful application of these materials in construction. These findings provide valuable insights for civil engineers, construction professionals, and researchers in materials science and construction technology, enhancing their understanding of the role of mineral admixtures in paving block strength.
The Effects of Quartz Sand Variation as an Additive on Concrete Compressive Strength (No Air Added) Faisal, Faisal; Sutandar, Erwin; Supriyadi, Asep
Jurnal Teknik Sipil Vol 25, No 4 (2025): Jurnal Teknik Sipil: Vol 25, No. 4, November 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i4.92086

Abstract

Concrete is a composite material widely used in construction due to its high compressive strength. However, variations in constituent materials can influence its quality and durability. One approach to improving concrete performance is to add quartz sand (SiO₂) as an additive. This study aims to analyse the effect of varying quartz sand content (0%, 5%, and 10%) on the compressive strength of non-air-entrained concrete. The research employed an experimental laboratory approach, producing cylindrical specimens cured for 28 days and tested using a compression testing machine in accordance with SNI 1974:2011. The test results showed that concrete with a 5% quartz sand addition achieved the highest compressive strength of 26.483 MPa, followed by regular concrete (26.087 MPa) and concrete with a 10% quartz sand addition (23.824 MPa). The results indicate that a moderate addition of quartz sand effectively enhances the compressive strength and density of concrete, whereas excessive dosage tends to increase porosity and reduce strength. Overall, 5% quartz sand is recommended as the optimal proportion to improve the performance of conventional concrete.
The Impact of Incorporating Varied Sand Powder on the Compressive Strength of Concrete (Including Air Addition) Sutandar, Erwin; Budi, Gatot Setya; Aryanto, Aryanto; Parabi, Ashraf Dhowian
Jurnal Teknik Sipil Vol 25, No 4 (2025): Jurnal Teknik Sipil: Vol 25, No. 4, November 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i4.92395

Abstract

Concrete is a primary construction material composed of a mixture of aggregates, cement, and water, where the proportion of each component significantly influences its physical and mechanical properties. A common issue in conventional concrete production is a reduction in strength due to uncontrolled porosity and poor air distribution. This study aims to evaluate the effect of sand powder substitution on concrete characteristics and to determine the optimal composition that enhances mechanical performance without compromising material efficiency. The experimental tests were conducted at the Materials and Construction Laboratory, Faculty of Civil Engineering, Universitas Tanjungpura, using a sand powder variation of 0%, 5%, and 10%. The tested parameters included unit weight, compressive strength, splitting tensile strength, flexural strength, and elastic modulus at curing ages of 3 to 28 days. The results showed that conventional concrete achieved the highest compressive strength of 34.802 MPa at 28 days, while the mixtures with 5% and 10% sand powder reached 26.26 MPa and 25.917 MPa, respectively. Although the substitution of sand powder reduced mechanical strength, its use has the potential to enhance construction sustainability by reducing the consumption of natural sand and utilising mineral waste as a replacement material.
Effect of Foam Agent & Bioball Addition on Physical and Mechanical Properties of Lightweight Concrete Tanjaya, Christy Andhika; Supriyadi, Asep; Sutandar, Erwin
Jurnal Teknik Sipil Vol 25, No 4 (2025): Jurnal Teknik Sipil: Vol 25, No. 4, November 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i4.92468

Abstract

The growing demand for lightweight building materials that maintain adequate structural integrity has prompted research endeavors into lightweight concrete. This concrete possesses a lower specific gravity compared to conventional concrete, rendering it particularly well-suited for applications in soft soil and peatland environments, such as those prevalent in West Kalimantan. A notable innovation in the development of lightweight concrete involves the incorporation of foam agents and bioballs as supplementary materials, aiming to reduce the overall weight of the mixture without significantly compromising its mechanical properties. This research aims to analyze the effect of the addition of foam agent and bioball on the physical and mechanical properties of lightweight concrete, focusing on volume weight, porosity, compressive strength, split tensile strength, and modulus of elasticity. The research methodology comprised laboratory experiments with variations in the percentage of foam agent and bio ball. Compressive strength, split tensile strength, and modulus of elasticity tests were conducted at 7, 14, and 28 days of concrete age. Additionally, specific gravity and porosity measurements were taken to analyze the impact of additional materials on the physical properties of lightweight concrete. The findings indicated that incorporating foam agent and bioballs in the concrete mixture led to a reduction in the weight content of lightweight concrete to ≤ 1850 kg/m ³ and an enhancement in porosity, without substantial compromise to the compressive strength within structural lightweight concrete standards.The optimal amalgamation of foam agent and bioballs yielded lightweight concrete with optimal characteristics in terms of mechanical strength and structural efficiency. Consequently, this renders it a suitable alternative solution for construction applications in areas with low soil bearing capacity, where structural weight reduction is a major factor in design planning.
PERHITUNGAN STRUKTUR BETON BERTULANG GEDUNG 7 LANTAI SEKOLAH SANTU PETRUS DENGAN SISTEM RANGKA PEMIKUL MOMEN Puspabella, Fany; Sutandar, Erwin; Yusuf, Muhammad
JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Vol 9, No 1 (2022): JeLAST EDIS FEBRUARI 2022
Publisher : JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v9i1.53691

Abstract

Pesatnya perkembangan di dunia pendidikan mengakibatkan peningkatan kebutuhan terhadap bangunan tinggi sebagai sarana dalam kegiatan belajar mengajar di sekolah. Bersumber pada Standar Nasional Indonesia (SNI 1726-2019) mengenai Tata Cara Perencanaan Ketahanan Gempa untuk Struktur Bangunan Gedung dan Non Gedung, Kota Pontianak termasuk ke dalam daerah dengan gempa ringan. Setiap perancangan bangunan di Kota Pontianak saat ini harus memperhitungkan parameter gaya gempa. Sehingga dilakukan perhitungan struktur gedung 7 lantai Sekolah Santu Petrus untuk mendapatkan dimensi komponen struktur yang tahan terhadap beban gempa. Perancangan gedung ini merupakan struktur beton bertulang dengan Sistem Rangka Pemikul Momen dan dimodelkan dengan bantuan program analisis struktur. Struktur dianalisis terhadap beban yang bekerja pada gedung tersebut. Pada analisis pengaruh gempa, gedung ini termasuk kategori desain seismik KDS D, maka dalam analisisnya akan mengikuti persyaratan Sistem Rangka Pemikul Momen Khusus (SRPMK). Hasil kontrol perilaku struktur terdapat ketidakberaturan struktur tipe 2 dan 3 serta ketidakberaturan vertikal struktur tipe 2. Dimensi struktur pelat lantai setebal 100 mm, balok induk 300/600 mm dan 450/800 mm, balok anak 300/600 mm dan 200/400 mm, serta kolom persegi 700/700 mm dan kolom bundar diameter 700 mm. Fondasi yang digunakan adalah fondasi dalam tiang pancang karena sesuai dengan kondisi tanah di Kota Pontianak.  Kata Kunci: Beton Bertulang, Perancangan Struktur, Sistem Rangka Pemikul Momen Khusus.
Co-Authors - elvira - Faisal, - Alfry Dimaswara Anastasia Esi ARDIANSYAH ARDIANSYAH Arifin Arifin Arsita, Erra Aryanto Aryanto Asep Supriyadi Asep Supriyadi Asep, Supriyadi Atmadja, Gilbert Laurent Azwansyah, Heri Dwiyono, Dhio Asril Eddy Samsurizal Elvira Elvira Fadhil Isnan Saputro Faisal Faisal Fathur Rahman Ferry Juniardi Ferry, Juniardi Garry Marpahiko Gatot Setya Budi Hardianto, Raditya Herwani . Indrayuni, Putri Juniardi, Ferry Kristian, Alex lo, Hansen Lusiana Lusiana M Indrayadi M, Indrayadi Michael Jhon Martin Sianturi Modestus, - Muhammad Yusuf Parabi, Ashraf Dhowian Powerija, Ing Cahya Pratama, Alfin Rizki Puspabella, Fany Riyan Dika Fajar Safaruddin, Nuh M. Saputra, Oktorio Selvialesti, Jessy Setiawan, M. Imam Silaban, Pedro Agus Radot Stefanus Barlian Soeryamassoeka Suganda, Agus Supriadi, Asep Syahrudin Syahrudin, Syahrudin Tanjaya, Christy Andhika wawan - Widodo, Tandiono