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All Journal Info-Teknik Jukung (Jurnal Teknik Lingkungan) Jurnal Infrastruktur Cerucuk. Prodi S1 T. Sipil. Jurnal Teknologi Berkelanjutan
Gawit Hidayat
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology Transportation

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STUDI EKSPERIMENTASI PERBANDINGAN KARAKTERISTIK CAMPURAN TANAH BERPASIR DAN KAOLIN DENGAN CARA DYNAMIC DAN STATIK COMPACTION Gawit Hidayat
INFO-TEKNIK Vol 12, No 2 (2011): INFOTEKNIK VOL. 12 NO. 2 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i2.1803

Abstract

One of the many factors that affect the compaction is the way of its compaction, the common ways which used in laboratory are Standard and Modified Proctor. The aim of this research are to use the comparison of characteristic value of soil mixtures of Padalarang Sandy Soil and Nagrek Kaolinite in the static and dynamic compaction and find a relationship among CBR with Static and Dynamic Cone Penetrometer.This research shows that at the same condition of dry density and optimum water content the compacted soil with static way get static force 8 ton and 11 ton to close standard and modified proctor results, and also to have the characteristic values less bigger than dynamic one about 3.75% to 46.68%. This item can be shown by permeability tests and the characteristics by california bearing ratio, static and dynamic cone penetrometer. Besides the water content, the percentage of Padalarang Sandy Soil and Nagrek Kaolinite’s mixture very affect the mechanic properties such as increasing of soil against the mixture with Nagrek Kaolinite will tend decreasing  the CBR and qc  value  and   increasing N DCP value. The trend of regresion curve resulted by static and dynamic compaction is similar. The approach equations which often used are non linear equations therefore the results are in a good enough and satisfied regresion coefficient about 0.8 to 1.Based on the result of tests also show that the soil mixtures of Padalarang Sandy Soil and Nagrek Kaolinite is not stable against soaked process where can be seen with the tedency of the characteristic value can not be measured in the soaked condition.
Studi Kasus Analisis Kerusakan Abutmen Jembatan Sungai Bahalang Kalimantan Tengah Gawit Hidayat
Jurnal Teknologi Berkelanjutan Vol 1 No 01 (2012): Vol 01 No. 01
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13800.079 KB)

Abstract

Bahalang Bridge is a Class B truss bridge crossing the Bahalang River in Ampah (Central Kalimantan). Itwas built to connect roads for coal transportation. The bridge structure has a problem, namely an abutment failure in itseast-side abutment. There has been a 30-degree rotation that the back side of abutment has moved about 2 metersdownward and slipped from its place about 1 meter to the river. The purpose of this study is to study the behavior of thesoil layers around the abutment and to find out the main cause of failure. The analysis is based on approximatecalculation using Plaxis and Xstabl computer packages. Two options of calculation are considered. In the first option awater level of29.5 m is used. Xstabl shows an SFmin of 0.764 and Plaxis shows a total displacement of 64.5 m. In thesecond one the water level of the river is assummed to be 27.4 m. Xstabl shows an SFmin of 0.807 and Plaxis shows atotal displacement of 4.15 m. The results suggest that the collapse already took place during the backfill activity on theeast-side approach road. During that process the backfill material consisting of sand was laid too rapidly by directdumping from truck and spreading by excavator.s. The total displacement is 6.45 m. The pile bending moments aerfound to be above the allowable value, that is 57.81 kNm in front of the piles, and 63.90 kNm on the back. It can beconcluded that the failure is due to excessive displacement that has. the potential to damage the piles.
ANALISIS KETERSEDIAAN AIR PADA LAHAN PERTANIAN DAERAH PEMATANG PANJANG, KECAMATAN SUNGAI TABUK Elma Sofia; Gawit Hidayat; Moh. Alfianoor Risyandha; Mirwan Muhammad Rasyid
Jukung (Jurnal Teknik Lingkungan) Vol 9, No 2 (2023)
Publisher : Program Studi Teknik Lingkungan Fakultas Teknik Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jukung.v9i2.17572

Abstract

Salah satu unsur yang berperan dalam ketersediaan air untuk memenuhi kebutuhan air tanaman adalah curah hujan terutama pada lahan tadah hujan. Potensi ketersediaan air merupakan salah satu faktor yang berpengaruh dalam peningkatan indeks pertanaman. Pada penelitian kali ini akan dilakukan investigasi ketersediaan dan kebutuhan air di daerah Pematang Panjang, Kabupaten Banjar. Investigasi ini bertujuan memaksimalkan potensi yang dimiliki oleh daerah pertanian tersebut dengan menganalisis kebutuhan dan ketersediaan air yang ada. Batasan masalah penilitian ini yaitu ketersediaan air yang dianalisis berasal hanya dari curah hujan. Pada penelitian ini digunakan data-data sekunder berupa data hujan, data klimatologi dari tahun 2001 sampai tahun 2021, serta data debit sungai tahun 2001. Data-data tersebut di analisis menggunakan beberapa metode diantara nya yaitu rumus Harza untuk mendapatkan curah hujan andalan yang kemudian digunakan untuk menghitung curah hujan efektif, metode Penman Monteith untuk mendapatkan nilai evapotranspirasi, serta metode F.J. Mock untuk mendapatkan debit andalan atau ketersediaan air. Dari penelitian ini diketahui bahwa debit andalan atau ketersediaan air maksimum terjadi pada bulan Februari ke-I yaitu sebesar 1,961 m3/dt, sedangkan debit andalan paling rendah terjadi pada bulan Agustus ke-I yaitu sebesar 0,103 m3/dt. Kata kunci: Debit Andalan, Evapotranspirasi, F.J. Mock, Pematang Panjang, Penman Monteith
ANALYSIS OF REMAINING CONSTRUCTION MATERIALS AND THEIR CAUSAL FACTORS IN BUILDING PROJECT Candra Yuliana; Sofia, Elma; Hidayat, Gawit; Munawarah
Jurnal Infrastruktur Vol 10 No 1 (2024): Jurnal Infrastruktur
Publisher : Jurnal Infrastruktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/infrastruktur.v10i1.6328

Abstract

The problem that occurred in the ABC Flats Construction Project in Banjarbaru was that the project land was quite narrow. So if there is a large scale accumulation of material waste and lack of material management it can result in delays in the construction process, especially the mobilization and demobilization of tools. The aim of this research is to determine materials that cause large waste costs and the factors that cause them, as well as possible strategies to minimize waste. The analysis method is carried out using Pareto, waste cost and fishbone analysis. Collecting data by means of observation and interviews or brainstorming on several similar projects. The results of the Pareto analysis (80/20) show that there are two materials that contribute large costs, namely iron and concrete. The material that has the potential to generate large waste costs in the ABC Kalimantan Flats Construction Project as of the 21st week is ready mix concrete. The contribution of waste value per square meter is 0.073 m3 with a waste cost of 0.003% of the contract value. Based on the fishbone analysis, it was found thst the factors causing waste are a narrow location, stacking of moving materials, workers placing material carelessly, length of reinforcement that is not uniform, simplification of the shape of the pile cap structure, use of tools that do not match their function, number of orders that do not match, the rest of the concrete in the mixer, workers fatigue. Strategies to minimize waste of iron-concrete and ready-mix concrete materials are providing guidance to blacksmiths and workers, making access to tool distribution, using tools according to their functions, utilizing residual concrete, analyzing linear programs or barbending schedules. These results become considerations and suggestions in reducing the project budget due to the impact of material waste.
STUDI PEMANFAATAN ABU TERBANG LIMBAH HASIL PEMBAKARAN CAMPURAN CANGKANG DAN SERABUT KELAPA SAWIT SEBAGAI SUBSTITUSI SEMEN PADA PEMBUATAN BETON NORMAL DI LAHAN BASAH Rahman, Fauzi; Hidayat, Gawit; Bertiani, Novita
INFO-TEKNIK Vol 21, No 2 (2020): INFOTEKNIK VOL. 21 NO. 2 DESEMBER 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v21i2.10175

Abstract

According to the Badan Pusat Statistik data in 2018, the total area of oil palm plantations in Indonesia currently reaches around 12.3 million hectares. Solid waste is the most waste, which is around 35-40% of the total Fresh Fruit Bunches (FFB) which is processed in the form of empty fruit bunches, fiber, fruit shells, and burnt ash. PT. Hasnur Citra Terpadu in Rantau, Tapin Regency, South Kalimantan is one of the Palm Oil Mill which in the combustion process of a boiler engine using oil palm shells and fibers is burned simultaneously. The result of the combustion process produces waste in the form of boiler crust ash which is fine textured (fly ash) and coarse textured (bottom ash). This study uses fly ash as a cement substitution for concrete mixtures. The making of mortar specimens was varied with fly ash with a percentage of 0%, 10%, 15%, 20% and 25% which will be tested for compressive strength at the age of 3 days, 7 days, 14 days, 21 days, and 28 days. Then the making of concrete specimens is planned with a quality of 25 MPa and the concrete compressive strength is tested at the age of 3 days, 7 days, 14 days, 28 days and 56 days and the split tensile strength test of the concrete at 28 days. Based on the results of the mortar compressive strength analysis, the optimum mixture of fly ash is 10% which is used for making concrete. The average compressive strength of normal concrete at 28 days is 26.33 MPa and the compressive strength of concrete with 10% fly ash (optimum concrete) is 26.14 MPa exceeding the design compressive strength of 25 MPa. Based on the results of the split tensile strength test of concrete at the age of 28 days, it was obtained 3,914 MPa for normal concrete and 3,466 MPa for optimum concrete.
SCHEDULING ANALYSIS OF PLAN, REALISATION, AND ESTIMATION BY USING PRECEDENCE DIAGRAM METHOD (PDM) (CASE STUDY : CONSTRUCTION DEVELOPMENT PROJECT MULTI-PURPOSE SPORTS HALL PHASE IV IN KATINGAN REGENCY) Putri, Dhika Fitrianita; Widiastuti, Endah; Afrila, Humaira; Hidayat, Gawit
CERUCUK Vol 9, No 1 (2025): CERUCUK VOL. 9 NO. 1 JANUARY 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/crc.v9i1.14731

Abstract

In its implementation, starting from planning, scheduling implementation, to supervision and implementation of controls properly, construction projects have a complicated and dependent series at each stage. In the process of Construction of Phase IV Multipurpose Sports Building located in Katingan Regency, there were delays due to several obstacles. This is related to time management, thus affecting the delay in project completion. This study aims to analyse the difference in the period of delay that occurs based on the scheduling plan, realisation, and estimation with the help of Microsoft Project 2021, as well as identifying the critical and non-critical path of work on the three schedules. In this study, the quantitative analysis method, where data collection was carried out by interviewing and distributing questionnaires to several respondents from Supervisory Consultants and distribution of questionnaires to several respondents from the Supervisory Consultant and Implementing Contractor with a total of 6 respondents.Based on the results of PDM analysis with the help of Microsoft Project 2021, a comparison of the total duration of work based on plan, realisation and estimation scheduling was obtained, namely in the plan scheduling for 272 days, realisation scheduling for 249 days, and estimation scheduling for 267 days.Based on the three schedules, the work with the most critical status is obtained in Preparatory Work, Concrete Structures, Doors and Windows, Electrical and Electrical, and Procurement of Equipment Etc. And from the results of the questionnaire recapitulation, it is concluded that the influencing factors in the construction process of this project are unstable weather, material supply mobilisation process, and lack of manpower. Keywords : Critical and Non-Critical Path, Microsoft Project 2021, Rescheduling, Precedence Diagram Method (PDM)
Co-Authors Afrila, Humaira Bertiani, Novita Candra Yuliana Elma Sofia Elma Sofia, Elma Endah Widiastuti, Endah Mirwan Muhammad Rasyid Moh. Alfianoor Risyandha Munawarah Putri, Dhika Fitrianita Rahman, Fauzi