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Discrete Element Method Approach to Simulate Cracks in Four-Point Flexural Test Faqih Ma arif; Slamet Widodo; Maris Setyo Nugroho; Zhengguo Gao
UKaRsT Vol. 7 No. 1 (2023): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v7i1.4401

Abstract

Concrete is a material that is widely used in construction. Concrete research efforts are ongoing and through a series of experimental tests. On the other hand, experimental tests require a lot of money, take a long time, and create waste. Several studies have revealed that numerical testing can accurately test concrete to fractures. However, modeling for the four-point load flexure test pattern is still not widely discussed. This study aimed to model the four-point flexural test of concrete using the discrete element method (DEM) approach. Sieve gradation was performed to determine particle size, and flexure testing was performed to calibrate the DEM model. DEM flexure testing was made using Yet Another Dynamic Engine (YADE) software with ASTM D6272 reference and beam dimensions 105 x 105 x 535 mm. The cohesive contact model with spherical particles is used, and the algorithm developed modifies the faceted sphere of interaction. The study results revealed that DEM can simulate crack behavior in flexural testing of unreinforced concrete. The DEM results show only a 2.13% difference in the experimental results of the flexural strength test. Meanwhile, crack behavior can be observed directly in the DEM simulation. The results of this study can be used to predict the failure pattern of the flexural test structure and to design the right proportion of the mixture to match the desired flexural strength. So that material efficiency and concrete flexure testing time can be achieved.
PERFORMANCE OF MASONRY BRICK WITH CALCIUM HYDROXIDE AS MORTAR Darmono Darmono; Faqih Ma’arif; Slamet Widodo; Maris Setyo Nugroho
Jurnal Pensil : Pendidikan Teknik Sipil Vol 12 No 3 (2023): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v12i3.37905

Abstract

This study aims to determine the shear strength and flexural strength of red brick masonry, determine the effective thickness of calcium hydroxide mortar with a mixture ratio of 1Kp:2Ps, and determine the failure pattern of red brick masonry due to the load received during the direct shear strength test and flexural strength test. The research was conducted by experimental method. The tests carried out were the direct shear and flexural strength tests. Variation of successive mortar thickness of 10mm, 15mm, and 20mm. The test object is 18 (eighteen), the thickness variation consists of 3 test objects. Data analysis used descriptive quantitative by finding the average value of the shear strength and flexural strength. Based on the test results, the average compressive strength and splitting tensile strength of the mortar were 0.613 MPa, 0.0414 MPa. The average shear strength with a 10mm; 15mm; and 20mm is 0.025 MPa; 0.020 MPa; and 0.016 MPa, respectively. The flexural strength of mortar thickness with 10mm, 15mm, and 20mm are 0.034 MPa; 0.045 MPa; and 0.041 MPa, , respectively. In the masonry shear test, the effective thickness of the mortar was found at 10mm with a maximum shear strength of 0.025 MPa, while in the flexural test, the effective thickness of the mortar was found at a thickness of 15mm with 0.045 MPa. The pattern of failure in red masonry's shear strength and flexural strength tests is the mortar failure.
Pembangunan Mushola sebagai Sarana Pendukung Tempat Wisata Taman Goa Jetis-Jatinom, Kabupaten Klaten Fajarwati, Yuli; Suwartanti, Suwartanti; Dewata, Hendra; Nugroho, Maris Setyo; Widodo, Slamet; Batuna, Nerizza Cheryl Salma; Nugraheni, Risa
Civil Engineering for Community Development (CECD) Vol 3, No 2 (2024): Edisi Oktober 2024
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/cecd.v3i2.29312

Abstract

Desa Wisata Jetis terletak di Kelurahan Jatinom yang memiliki upacara adat bernama Yaa Qowiyyu dan diselenggarakan setiap bulan Sapar. Taman Goa Jetis berada di Kawasan Makam Ki Ageng Gribig yang menjadi tempat berkembangnya Islam di Tanah Jawa. Goa yang terletak diantara dua taman tersebut saat ini dibuka untuk umum dan digunakan sebagai tempat berziarah. Dengan dibangunnya tempat wisata ini, dibutuhkan adanya sarana pendukung salah satunya tempat ibadah. Tujuan PKM ini yaitu pembangunan Mushola sebagai sarana pendukung dari Taman Goa Jetis ini. Pembangunan Mushola ini dilakukan dengan empat tahap, yaitu melakukan analisis masalah dengan mengobservasi lokasi pembangunan Mushola, melakukan perencanaan desain berdasarkan data observasi yang didapatkan, melakukan pendataan material dari desain yang dibuat, dan melaksanakan pembangunan. Pembangunan Mushola ini dilaksanakan oleh keterlibatan masyarakat setempat dan tim PKM. Kendala yang dihadapi selama pembangunan Mushola antara lain mobilisasi material, faktor alam, pengerjaan secara manual, dan keterbatasan alat.
DEVELOPMENT OF ECO-FRIENDLY MORTAR UTILIZING INDUSTRIAL WASTE M Afif Shulhan; Zainul Faizien Haza; Maris Setyo Nugroho
Journal of Green Science and Technology Vol 6 No 2 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.6 NO.2 SEPTEMBER 2022
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i2.6890

Abstract

Introducing alternatives material on cement-based material manufacturing is the need for environmental sustainability due to the excessive mining of sand from quarry and river bed. At the same time, industrialization headed to an uncontrollable growth of waste. This fact encourages the researcher to enhance the utilization of recycled waste in construction practice. On one side, it affords a solution for waste management, and on the other hand, it contributes to an eco-friendly construction material that minimizes the environmental impact. This paper aims to investigate the usability of the iron waste obtained from the wrought iron industry, as natural fine aggregates replacement. In particular, it focused on studying the physical characteristic of waste aggregates and the effect of partial replacement of natural sand on mortar strength. Mortar cube specimen made with various levels of replacement (0%, 10%, 20% and 30 %) and also various cement-aggregates volumetric proportion, which are 1:3, 1:4, 1:5, 1:6, and 1:7. All of the measurement parameters are taken consecutively based on ASTM norms. The current work remarks that both waste aggregates and natural aggregates reveal complete fulfillment in the aggregate requirement of ASTM standard. Furthermore, the mortar cube test confirmed that the mortar passes the strength grade for N class and O class, which suitable for the above-grade and non-load bearing application.
The Effect of Mortar Mixture Variations on the Compressive Strength and Ultrasonic Pulse Velocity Nugroho, Maris Setyo; Ma'arif, Faqih; Widodo, Slamet; Rachmi, Dewi; Fajriani, Qonaah; Suryadwanti, Novia; Setiawan, Wildan
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.55256

Abstract

This paper examines the correlation between compressive strength, porosity, and ultrasonic wave propagation in mortar. The research was conducted at the Yogyakarta State University Building Materials Laboratory. The study used an experimental method, mortar was made with variations in the ratio of cement and fine aggregate 1:3, 1:4, 1:5, 1:6, and 1:7 with a phase of 0.48. The manufacture of test objects in the form of a cube measuring 5x5x5 cm refers to SNI 03-6825-2002. Tests were carried out at the age of 3, 7, 14, 21, and 28 days with three samples per test age. The data was processed by quantitative descriptive method to determine the relationship between the variables, especially the relationship between wave propagation speed and compressive strength, as well as its relationship with the porosity value. The results of compressive strength and wave propagation speed are directly proportional to the age of the test. With the results of the compressive strength at 1:3, 1:4, 1:5, 1:6, and 1:7 variants, respectively 31.12 MPa, 19.83 MPa, 12.25 MPa, 5.38 MPa, and 3.89 MPa and wave propagation speed of 3827.67 m/s, 3641.7 m/s, 3561.3 m/s, 2019,0 m/s, and 1691.0 m/s. Then the porosity values are 11.12%, 12.88%, 16.36%, 17.60%, and 22.06%. The compressive strength has a correlation that is directly proportional to the logarithmic speed of wave propagation, the higher the value of the compressive strength, the higher the UPV value, and inversely proportional to the porosity value as well as the speed of the wave propagation which is inversely proportional to the porosity value. The higher the porosity value, the lower the compressive strength value and the UPV value.
Comparation Study of Wood Quality Influenced by Water Content with Ultrasonic Pulse Velocity Test Approach Darmono, Darmono; Nugroho, Maris Setyo; Pamungkas, Rama Aji Pupus
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 19 No. 1 (2023): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v19i1.60759

Abstract

In general, the building evaluation requires a sample from the building being tested. However, this cannot be done in cultural heritage buildings such as Masjid Gedhe Mataram. Because of that reason, an Ultrasonic Pulse Velocity test (UPV) is applied. This test aims to determine the strength of the wood quality due to the influence of its water content using the ultrasonic pulse velocity direct method. In the UPV test, the results are in the form of wave propagation which is influenced by several factors such as the type and the water content of the wood. There were 3 types of tested wood, 9 specimens each. The types of tested wood were kruing (KR), sengon (S), and teak wood (JTB). The water content was set at 12%, 15%, 20%, 25%, and 30%.The results showed a strong correlation between MoE and MoEd values of kruing wood with an R2 value of 0.8405, a weak correlation of sengon wood with an R2 value of 0.31, and a strong correlation of teak wood with an R2 value of 0.9331. The differences in wood quality based on modulus of elasticity between bending testing and UPV were 0.9 - 4.43% for kruing wood, 3.23 - 23.4% for sengon wood, and 3.4 - 33% for teak wood.
Empowering community-based water and sanitation services through solar photovoltaic systems: A pathway to energy self-sufficiency Nurhening Yuniarti; Andik Asmara; Alex Sandria Jawa Wardhana; Eko Swi Damarwan; Maris Setyo Nugroho
Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Vol. 10 No. 2 (2025): May 2025
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/abdimas.v10i2.14964

Abstract

Banyu Bening, an independent community group providing clean water and sanitation services, faces challenges related to energy consumption and water distribution management. The primary issue addressed was the high electricity cost for operating water pumps during the early stages of the business. This problem was particularly critical as the group was newly established and required appropriate technology to overcome these obstacles. Therefore, the main objective of this Community Service Program was to address Banyu Bening’s problems—specifically, the high electricity consumption and low water pressure in the distribution network. The problem-solving process involved several steps: situation analysis, focus group discussions (FGD), material identification, assembly and testing, installation, community socialization, and evaluation. The implemented solution was the installation of a 2kWp solar power system. The final assessment revealed that the system operates optimally, successfully reducing electricity costs by 70 percent.