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Irfanto, Ryobi
Universitas Kristen Krida Wacana
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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IMPLEMENTASI PRINSIP PARETO PADA PEKERJAAN PERBAIKAN DI PROYEK PERUMAHAN: STUDI KASUS: PROYEK PERUMAHAN DI KOTA TANGERANG SELATAN Irfanto, Ryobi; Charolin, Eva
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol 7 No 1 (2024): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/cesd.v7i1.20264

Abstract

Rework in construction refers to the activity of repairing or redoing work that does not meet quality standards, causing delays and increased costs. The aim of this research is to identify the causes of rework in building structures, with a case study of four types of houses in one of the housing complexes in South Tangerang City. This research focuses on the use of quality improvement tools such as Pareto Charts. Pareto diagrams, based on the Pareto principle which states that most consequences come from a small number of causes, are used to identify and prioritize the causes of rework. The types of work that most frequently result in rework will be monitored more closely to minimize future errors. Data collection through field observations by calculating the frequency of repair work. The results of the analysis show that most rework is caused by some type of repeated error. The implementation of Pareto resulted in 75% of rework resulting from 50% of the causes. There were 5 causes of rework occurring which were analyzed, namely inappropriate dimensions, elevation differences, slanted formwork, ends of reinforcement that were not connected, and reinforcement that needed cleaning. This implementation helps in solving these 5 problems and provides lessons for other similar projects
COMPARISON OF CONCRETE AND MODULAR STORAGE PONDS FOR FLOOD CONTROL (CASE STUDY CATCHMENT AREA OF TAMAN RATU CHANNEL) Thalia Margaretha; Elly Kusumawati Budirahardjo; Ryobi Irfanto
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p03

Abstract

Taman Ratu Housing Area which is included in the drainage area of the Taman Ratu connecting channel is almost always flooded with a height variation of 30-60 cm at the peak of the rainy season. One solution of the flood control system according to the principle of sustainable drainage is the utilization of storage ponds. The availability of land, which is dominated by residential areas, motivates the placement of below ground pools with 2 different models, known as concrete pond and modulars. The placement of below ground ponds is also intended to fulfill public facilities into green open space areas. Therefore, this study was conducted to determine the comparison of cost budget plans related to the dimensions of the planned pond. The method that will be used through three stages of research includes hydrological analysis to calculate planned rainfall and planned runoff discharge, followed by hydraulic analysis for the design on the total land area of the development plan of 2015.88 m2, the maximum storage volume obtained with dimensions of 45×45×1.5 m is 421.84 m3 for a 5-year rain return period. The preparation of work unit prices refers to the Minister of PUPR Regulation No.8 of 2023 so that a budget value of Rp 6,256,025,595.86 for concrete pond and Rp 10,518,367,732.62 for modular pond is obtained.
COMPARISON OF CONCRETE AND MODULAR STORAGE PONDS FOR FLOOD CONTROL (CASE STUDY CATCHMENT AREA OF TAMAN RATU CHANNEL) Thalia Margaretha; Elly Kusumawati Budirahardjo; Ryobi Irfanto
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p03

Abstract

Taman Ratu Housing Area which is included in the drainage area of the Taman Ratu connecting channel is almost always flooded with a height variation of 30-60 cm at the peak of the rainy season. One solution of the flood control system according to the principle of sustainable drainage is the utilization of storage ponds. The availability of land, which is dominated by residential areas, motivates the placement of below ground pools with 2 different models, known as concrete pond and modulars. The placement of below ground ponds is also intended to fulfill public facilities into green open space areas. Therefore, this study was conducted to determine the comparison of cost budget plans related to the dimensions of the planned pond. The method that will be used through three stages of research includes hydrological analysis to calculate planned rainfall and planned runoff discharge, followed by hydraulic analysis for the design on the total land area of the development plan of 2015.88 m2, the maximum storage volume obtained with dimensions of 45×45×1.5 m is 421.84 m3 for a 5-year rain return period. The preparation of work unit prices refers to the Minister of PUPR Regulation No.8 of 2023 so that a budget value of Rp 6,256,025,595.86 for concrete pond and Rp 10,518,367,732.62 for modular pond is obtained.
FATIGUE LIFE SIMULATION OF CONCRETE PAVEMENT STRUCTURE WITH NANOMATERIAL CONCRETE SLAB IN TROPICAL ENVIRONMENT Care, Frisky Ridwan Aldila Melania; Irfanto, Ryobi
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol 8 No 2 (2025): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/cesd.v8i2.25026

Abstract

Recent studies on nanomaterial concrete in Indonesia have demonstrated improvements in mechanical properties, particularly in the context of fatigue life for concrete road pavements. While traditional designs focus primarily on traffic axle loads, curling stress from temperature differentials also plays a significant role. Previous research using 3D finite element analysis (FEA) software, such as EverFE2.26, showed that the tensile and curling stresses matched those calculated by established methods like Westergaard and Bradbury. This research uses a mechanistic approach and 3D finite element analysis (FEA) software for simulations. A literature review gathered data on the mechanical properties of nanomaterial concrete. After inputting all required parameters, EverFE2.26 performed a stress analysis, allowing for the calculation of concrete pavement fatigue life. The simulation showed that temperature differential greatly impacts the fatigue life of concrete pavements in tropical environments like Indonesia. Nevertheless, nanomaterial concrete could be a promising option to reduce those impacts if its strength can be further improved
Co-Authors Abduh, Muhamad Anita Ariesty Artha Wicaksana Aswin O. Hasudungan Care, Frisky Ridwan Aldila Melania Charolin, Eva Chiandy Delfani, Catherine Dermawan Dermawan Elly Kusumawati Budirahardjo Florencio, Ricardo Halvireski, Siska Hans Dermawan Iwan Saputra N W Jehuda Christofel Sriwijaya Lidyawati, Rut Manulye, Ian Hendrata Muhammad Rusdian La Ola Reini D. Wirahadikusumah, Reini D. Salim, Felicia Devita Thalia Margaretha