Indonesia Conference Directory

Corresponding Author
Firman Syarif

Institutions
Program Studi Teknik Sipil Fakultas teknik Universitas Islam Riau, Riau, Indonesia
firmansyarif[at]eng.uir.ac.id

Abstract
Nowadays, the use of bacterial calcium carbonate precipitation (bio cementation) has become popular as a ground improvement technique for sandy soil. However, this technique was not too much applied to organic or peat soil. Siak is one of the districts in Riau which has a fairly large area of peat. Many problem occurs because of the peat during the construction of infrastructure in Siak. This study focused on bacterial calcium carbonate precipitation from sea bacterial (Bacillus Sp) and its effect on permeability in organic soil. A special injection system was prepared for inducing bacterial solution to the samples. The bacterial solution supplied to the samples by gravity for 7 days in specific molds designed for this work. Calcite precipitation was observed by monitoring pH value and measuring amount of calcium carbonate. Change in the permeability was measured before and after bio cementation. Through this research, calcium carbonate precipitation from sea bacterial (Bacillus Sp) hoped can improve engineering performance especially in reducing permeability aspect of organic or peat soil so this technique suitable and help reducing the problem in construction of infrastructure in Siak district

Keywords
Calcium Carbonat Precipitation, Bacillus Sp, Peat, Organic Soil, Permeability

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/RFxfcK6rmJ7D

Corresponding Author
Budi Yulianto

Institutions
Civil Engineering Department,
Engineering Faculty,
Sebelas Maret University,
Jl. Ir. Sutami 36A,
Surakarta (57126),
Indonesia

Abstract
The development of traffic in the central business district area along the Brigjend Slamet Riyadi Street, Surakarta City, Indonesia, is relatively dense and not in accordance with the development and changes in the environmental situation. These phenomenon makes traffic jam at the signalized intersections. Transportation planning related to management and traffic engineering, and infrastructure needed to be done to parse the traffic problems. Based on the vision of the local government related to sustainable transportation, then the Brigjend. Slamet Riyadi road will adopt a one-way system with a contra flow for public transport. In order to improve the performance of signalized intersection, therefore, needs to be installed bus priority traffic signal control at signalized intersection. The aim of this research is to design demand responsive bus priority traffic signal control at signalized intersection to minimize vehicles delay and reduce the bus travel time. The extension and recall methods at Vehicle Actuated Traffic Signal Control have been developed and evaluated by using VISSIM microscopic simulation tool. The performance of these methods has been evaluated at mixed traffic conditions of developing country where the traffic is untidy, traffic streams consist of different types of vehicles with a wide variation in their static, dynamic and operating characteristics, and with a particularly high proportion of motorcycles. The simulation results show that performance of bus priority traffic signal control better than fixed time control in terms of vehicle delay and bus travel time.

Keywords
bus priority, signal control, VISSIM, mixed traffic

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/TMDvyBHmLGRY

Corresponding Author
Mirza Al Mahbubi

Institutions
a) Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Jl. Raya ITS, Surabaya 60111 Indonesia
*Mirzaalmahbubi[at]gmail.com

Abstract
The quality of road pavement construction is strongly influenced by the composition of the material used, including the type of aggregate. Selection of the type of aggregate suitable for use in pavement construction is influenced by several factors, namely gradation, shape and surface texture. Aggregates have various forms and textures including round and cube shapes. At present, infrastructure development in Indonesia continues to increase the amount of natural aggregate use, so this will cause the availability of raw aggregate raw materials to continue to thin out. Fly ash can be an alternative for material. Fly ash coal must be reacted with chemical solutions as a mixed material so that it can be a geopolymer material, in this study Fly ash will be mixed with a chemical solution in the form of sodium hydroxide (NaoH) and sodium silicate (Na2SiO3). In this study there are two variations of the aggregate form to be used, namely the spherical shape of the processed granulator and the irregular shape of the processed stone crusher. With the addition of 25% round artificial aggregate and 25% artificial aggregate processed by stone crusher can provide high stability and meet specifications according to the Federal Aviation Administration (FAA).

Keywords
artificial aggregate , fly ash, geopolimer, marshall, stability

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/mDcQJYXr7vjw

Corresponding Author
Michael Michael

Institutions
Universitas Gadjah Mada

Abstract
Air transportation bccomes popular for people to travel. This kind of transportation is not only used to travel internationally, but also domestically. Indonesia, where the need of fast and long-distance transportation is crucial, makes domestic low-fare flights favourite for peole. However, this increasing demand on air transportation causes the rise of passengers which affects the terminal. One place which will be affected is check-in area. This is a place where passengers come to process their document, before they travel. There will be queues at check-in counters when the number of passengers is increasing, if the capacity of the terminal does not change. As a case study, Derparture Terminal A of Adisutjito Airport will assessed. This study will assess Citilink check-in queue which happen at peak hour. The result shows that there were three counters open to serve three different flight at peak hours, eventhough the flight company own six counters in check-in area. Using M/M/1 model, the evaluation shows there will be 2.73 minutes of waiting time until a passenger be processed at check-in counter. Furthermore, there will be 4-5 people waiting to check-in, with average time of check-in process is less than one minute.

Keywords
Queue, M/M/1, Check-in

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/TtAYHbGU7JLZ

Corresponding Author
Bambang Winarta

Institutions
a) Water Resources Engineering Department, Faculty of Engineering, Universitas Brawijaya, Malang, Indonesia
*bambang.winarta[at]ub.ac.id
b) Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Kuantan, Pahang, Malaysia

Abstract
General speaking, the 100-year ARI (Annual Recurrence Interval) with 24-hour duration storm generates the critical flood discharges and flood inundation depth all over the watershed. However, the real critical duration design storm may be something other than the 24-hour design flood event and perhaps there may be more than one critical duration storm that produces critical flood discharges and depth of flood inundation across the watershed. Usually, design flood with storm duration variation of the 3-, 6-, 12-, 24- and 48-hour with the 100-year ARI are used to identify the critical storm duration that produces the highest flood flows and also inundation level all over the watershed. This present study evaluates and demonstrates the impact of storm duration variation on generating a critical flood inundation. From this result can be selected the proper critical storm duration that produce the most severe flood inundation. In addition, Climate Change Factor (CCF) will be involved also in this analysis.

Keywords
storm duration variation; climate change; critical flood

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/y4nzwHBQ7bD8

Corresponding Author
Jazaul Ikhsan

Institutions
Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Indonesia

Abstract
Progo River is one of the rivers that has a sediment supply from volcanic and non-volcanic areas. Sediment transport, especially bedload transport, is very influential on the phenomenon of degradation and aggradation. Therefore, a study is needed to determine the characteristics of bedload transport. The research was carried out in the downstream of Progo River. Sampling locations were in four locations, namely Ancol Bridge, Kebon Agung II, Kebon Agung I Bridge and Bantar Bridge. The bedload transport measurement tool uses Helley Smith equipment. Based on the result, the type of sediment in bedload transport is sandy silt, with a value of density of 2.67 to 2.70. The average diameter value (D50) of bedload transport varies, from 0.10 mm to 0.558 mm. The value of bedload transport varies and is influenced by the value of the discharge. The correlation between bedload transport and discharge is linear.

Keywords
bedload, characteristics, diameter, density, linier

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/pfAzNcXGk4HR

Corresponding Author
Indra Rio Saputro

Institutions
a) PhD Student, Dept. of Civil Engineering, National Central University, Taiwan
b) Professor, Dept. of Civil Engineering, National Central University, Taiwan
indrariosaputro[at]gmail.com, hhsu[at]cc.ncu.edu.tw

Abstract
A new energy dissipation device that combined the BRB and pipe damper systems to form the buckling restrained slit pipe dampers (BRSPD) is proposed. This device incorporates a slit pipe damper that is limited by the inner tube. The outer tube was used as a restraining mechanism. Slit in the pipe is used to control energy dissipation and deformation capacity. This damper is designed to provide adequate hysteretic performance through core yielding under both tension and compression. A series of cyclic loading tests were conducted on the BRSPD and component test with the proposed devices. It was found that the BRSPD sustained significant strength and energy dissipation capability before reaching 3% drift ratio, if adequate number of slits in the core pipe was used.

Keywords
Buckling restrained slit pipe dampers, damper, energy dissipation, deformation capacity

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/6QBWV7xmHcNR

Corresponding Author
Guntur Nugroho

Institutions
(a*) Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Yogyakarta 55183, Indonesia.
guntur.nugroho[at]umy.ac.id
(b) Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Yogyakarta 55183, Indonesia.

Abstract
Semi precast bataton is one of the new approch in construction technology. Using bataton system can reduce waste construction as well as reduce time construction. The specimens consis of two column fondation connection using variation of longitudinal reinforcement, which subject to axial force of 120 kN and the horizontal force using cyclic loading. The test specimens were evaluated in terms of load-displacement relation, and cracking pattern.

Keywords
Semi Precast, Cyclic Loading, Column fondation

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/pFy7GC23aKxm

Corresponding Author
Ni Putu Ika Frisilia

Institutions
Institut Teknologi Sepuluh Nopember Surabaya

Abstract
Construction activities are very complex and risky. Therefore, the number of accidents in the construction industry is higher compared to other industries. On the other hand, the construction industry 4.0, forced construction technology to develop into the world of digitalization, especially Building Information Modeling (BIM). However, the relationship between safety management and technology-based information models has not been widely developed. This study aims to propose a model that integrates construction risks and BIM. This research was carried out by identifying risky construction activities, such as: the stability of scaffolding and formwork, stability of Tower crane, the position of openings / edges of buildings, etc. In this model, data or information will be obtained through sensors and visual observations. Bayesian Belief Network (BBN) will be used to combine risk and to calculate the probability of a hazard. To validate the proposed model, a building construction project in Surabaya was used as a case study. Beside integrating project risks and BIM, this model can also be used as an early warning system in construction projects.

Keywords
construction industry, building, safety management, BIM

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/9W2YTAfHFGwD

Corresponding Author
Muchlisin ST, M.Sc.

Institutions
Civil Engineering Study Program, Faculty of Engineering, Indonesia

Abstract
In a construction project development is almost always sure to always have problems that can cause delay and waste time. Both of the planning process, procurement even until the installation process will be faced with various technical and nontechnical problems that must be able to be minimized as well as possible by all sides of the construction project. Workers in construction projects such as Main contractors and SUB contractors are workers who often face problems directly in the construction project. Similarly, the Turbine Hall construction project at PLTU Tambak Lorok Block 3 Semarang was found in the project a few obstacles which became a factor of delay and waste time. This research was conducted to determine the factors of the cause of delays and waste time according to some elements of the workers main contractors and subcontractors working on the project by the dissemination of the questionnaire. The results obtained from all two elements of the worker are then analyzed using the descriptive analysis with SPSS for the cause of delays and analysis by Borda method to cause waste time factors. From the factors that cause delays and waste time gained from some elements of the worker, there will be a ranking analysis and known major factors.

Keywords
Delay factor, Waste time factor, Construction Management Construction project.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/FUNxnk698XHm

Corresponding Author
Edi Hartono

Institutions
a) Ph.D Student, Department of Civil Engineering, Diponegoro University, Semarang, 50241, Indonesia
b) Department of Civil Engineering, Diponegoro University, Semarang, 50241, Indonesia
c) Civil Engineering, Universitas Muhammadiyah Yogyakarta, 55183, Indonesia

Abstract
Durability is an important aspect of clayshale stability. Previous research has shown that cement stabilization is found effectively carried out to improve it. Soil stabilization studies show the importance of the stabilization method studied in addition to dry mixing as the most commonly used. Stabilization methods affect durability as indicated by the durability index. This paper presents the results of the investigation of clayshale durability stabilized with cement by dry and spray pulverizing and tested by the wetting-drying cycle in the slaking test. Two types of specimens used are compacted cylinders measuring 1.35inch in diameter and 1.35inch in height and compacted cylinders then broken into 40-60g weight fragments according to ASTM standard. The cement content were varied from 2 to 10 percent by weight of the dry soil. The results showed that the durability index of the spray-pulverized method was higher than dry-pulverized.

Keywords
Durability; Spray-Pulverized; Durability Index

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/b7EUaMLekZD6

Corresponding Author
Hakas Prayuda

Institutions
(a) Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta.
Jl. Lingkar Selatan, Tamantirto, Kasihan, Bantul, Yogyakarta, Indonesia, 55183
Email: dilla_vu[at]yahoo.com

(b) Ph.D Student in Department of Civil Engineering, National Central University.
Jongli City, Taoyuan County, Taiwan, 32001.

Abstract
Excessive use of cement makes the price of construction projects expensive. Mortar making using high amounts of cement also has the potential to increase the price of the construction. This study discusses the use of agricultural waste as a substitute for cement in mortar production. The waste used in this study was bagasse ash, fuel ash palm oil, and rice husk ash. Each waste is added as much as 25%, 50% and 75% which are then tested for mechanical properties such as water content, unit weight, absorption, and IRS. Compressive strength was tested when the mortar was 28 days old with a cube-shaped specimen with a size of 50 mm x 50 mm x 50 mm. From the test results, it was found that all of this waste can be used as a substitute for cement. To produce a compressive strength of 100 kg/cm2 can add each waste with a percentage range of 12-18% of the weight of cement.

Keywords
Mortar, Baggase Ash, Fuel Palm Oil Ash, Rice Husk Ash

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/pqEuDLvPTYGK

Corresponding Author
Wiryanta Wiryanta

Institutions
1 Doctoral Student of Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya; Civil Engineering Department, Faculty of Vocational School, UGM, Yogyakarta, Indonesia
2 Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia

Abstract
Access travel to and from Juanda International Airport (JIA) currently faces a severe problem, due to relatively high travel time. The use of private vehicles as an access mode to the airport causes longer travel time. The government plans to introduce the train as an alternative access mode to JIA. This research aims to get the choice probability of train as an alternative access mode. Though this topic may not a new issue in airport access mode, however, the characteristics of the traveler and the distribution of the origin passengers become an interesting condition to be discussed. To measure the response to this mode acceptance, this research adopts mode choice probability using Multinomial Logit Model. Data of 900 respondents indicate the characteristics of travelers through JIA. Results of the analysis show that generally there is a low probability of train mode choice. The causes of the low probability are concluded in six factors. Those factors are mode convenience, mode operational management, social characteristic, mode accessibility, transport system characteristic, number of baggage and party size factor. The total effect of the six factors is 61,23%. Based on the probability model of access mode choice, those factors affect the selecting of train, except the accessibility factor. It fails to enter the probability model formulation because it does not pass the partial test. Even though it is the most common influenced factor in public transport research. The six factors resulted from this research could become a reference to improve the train use probability.

Keywords
airport access mode, mode choice probability, multinomial logit model

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/BwNK2zyRvcqU

Corresponding Author
Trie Sony Kusumowibowo

Institutions
a) Department of Civil Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
*triesonyk[at]gmail.com

Abstract
In recent years circular economy has been widely discussed throughout the world as a solution to the problem of resources efficiency and also environmental problems, especially regarding waste. The construction industry is one of the largest waste-producing industries, even 30% of waste on landfills is construction waste. The application of circular economy in the construction industry has many interrelated and dynamic variables that change over time. This study aims to identify the variable of circular economy and analyze the pattern of its relationship using system dynamics method. The variables were obtained from in-depth literature review and interviews, including management performance, low-waste technology, and behavior. Then from these variables a causal loop diagram is created. This diagram describes the relationship between variables of circular economy. For model validation, a multi-storey building project in Surabaya is used as a case study. This study produces a model that can be used to estimate the volume of construction waste of waste with an accuracy of 86.12%. Scenario simulation results show that worker variables can reduce the volume of waste construction up to 7.91%, higher than other variables.

Keywords
Circular Economy; Construction Waste; System Dynamics

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/NnFHK7uG3BeV

Corresponding Author
Novi Asniar

Institutions
Sebelas Maret University

Abstract
Tufa rocks are pyroclastic rocks from volcanic eruptions which are then sedimentated and subsequently undergo metamorphosis. This sedimentation and metamorphosis process causes confusion and debate in naming / classifying tufa rocks. The process of visual identification of tufa rocks in the field is based on the color and size of the pyroclastic material. Petrographic analysis was carried out to find out more about the mineral and chemical content of tuffaceous rocks so that the classification of tufa rocks could be more specific. Minerals in tufa rocks are divided into primary minerals (primary minerals) and secondary minerals (secondary minerals). Primary minerals usually number more than secondary minerals and are referred to as phenocrysts (plagioclase and quartz feldfar). Secondary minerals in the form of white mica (muscovit), chlorite, epidote / clinozoisite, albite, actinolite, titanite, pyrite, and calcite. This paper summarizes the method of identifying tufa rocks from the collection of various literature on visual identification and petrographic analysis of tufa rocks from various locations in the world including Indonesia. The classification method used is: International Union of Geological Sciences (IUGS) based on phenocrysts content (and rock color), and Total Alkalis versus Silica (TAS) based on chemical content. In general, tufa rocks from various locations in the world and Indonesia are classified as dacite or rhyodacite rocks based on IUGS classification and classified as rhyolite rocks (SiO2 = 62% - 77%) based on the TAS classification.

Keywords
classification, Tufa Rocks, visual identification, petrographic

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/MHm9Fa2urkcZ

Corresponding Author
Wahyu Adistya Rindarti

Institutions
Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia

Abstract
The operational phase of the road project is considered successful when this type of facilities can improve the communitys life. One of the criteria for the project that is said to be successful is by applying the concept of sustainable development, consisting of three aspects, namely economic, environmental, and social aspect. This paper discusses social aspects regarding the role of the community participation in road construction projects. In the existing practice, community participation was applied at the environmental impact assessment, considered as a form of formality to get building permits. Previous researches on community participation have been carried out in several areas such as public buildings and urban planning. However, still limited research has been conducted in the area of road construction process. This paper investigates community participation criteria using mean analysis. The first conclusions from this research, there are 20 criteria for community participation to achieve a sustainable highway project in Surabaya.

Keywords
road, community participation, sustainable development

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/ZDrny4UdYAK7

Corresponding Author
Endo Petakasari

Institutions
a) Students of Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology Jalan Raya ITS, Surabaya 60111, Indonesia
* endo.petakasari[at]gmail.com
b) Civil Engineering Department, Faculty of Civil, Environmental & Geo Engineering, Sepuluh Nopember Institute of Technology

Abstract
Road preservation with a Long Segment Scheme is the handling of road maintenance within the boundary of a continuous segment length (can be more than one segment) carried out by one service provider. The output of the Long Segment Scheme is in the form of widening, reconstruction, rehabilitation and routine maintenance. In Road Preservation with Conventional Schemes the handling of road maintenance by service providers is limited to a certain scope of output and can be carried out by more than one contractor, specifically for routine maintenance activities carried out in self-management. Both schemes certainly have advantages and disadvantages as well as differences influence. The purpose of this study is to compare the preservation of Long Segment scheme and Conventional schemes. The research variable was obtained from three stages, procurement, implementation and maintenance stage. This study used the interview method and questionnaire to the expert then tested the validity and reliability. After that the variables are analyzed using the compare mean independent sample t test method which is processed using the SPSS application to obtain the dominant variable in each scheme then a comparative analysis is carried out between the two schemes. The result of this study is to get a comparison of the advantages and disadvantages of each stage implementation of the Long Segment and Conventional preservation schemes.

Keywords
Long Segment Scheme,Conventional Scheme, Road Preservation, Independent sample t test, Satker Pelaksanaan Jalan Nasional Wilayah I Jawa Timur

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Avb6MXetVH4q

Corresponding Author
Leonardus Setia Budi Wibowo

Institutions
a) Department of Civil Engineering, Widya Kartika University, Jl. Sutorejo Prima Utara II/1, Surabaya 60113, Indonesia

Abstract
Design building codes are primary book for structural design engineers to calculate flexural strength. In the design building codes, concrete has an important parts, those are rectangular stress block model and compression strain. This paper evaluates flexural strength of the reinforced concrete beam using six different design approach like ACI 318-14, AS3600-2009, CAN-A23.3-04, fib Model Code 2010, JSCE 2010 and NZS 3101:2006. 34 test reinforced concrete beam specimens in this database were tested under four-point monotonic loading, compressive strength of the concrete is in the range of 18 - 55 MPa and shear span-to-depth ratio is in the range 3 - 5. Based on limited database, the rectangular stress block and compressive strain proposed by fib Model Code 2010 resulted in a mean ratio of the predicted to measured flexural strengths close to 1.0 with a small coefficient of variation. In other hand, the model proposed by CAN-A23.3-04 provides the most conservative estimation.

Keywords
design building codes; beams; flexural strength; stress block; compression strain

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/EJAMyBQjzqYw

Corresponding Author
Reza Adhi Fajar

Institutions
a) Doctoral Study Program in Mining Engineering Department, Bandung Institute of Technology
Ganesha 10, Bandung 40132, Indonesia
b) Mining Department, Banjarmasin State Polytechnics, Kayutangi Banjarmasin 70124, Indonesia
*reza_af[at]students.itb.ac.id
c) Research Group of Earth Resources Exploration, Faculty of Petroleum and Mining, Bandung Institute of Technology
Ganesha 10, Bandung 40132, Indonesia
d) Research Group of Earth-physics and Complex-system, Faculty of Physics and Mathematics Sciences, Bandung Institute of Technology
Ganesha 10, Bandung 40132, Indonesia
e) Directorate General of Water Resources – Public Work & Housing Ministry, Jakarta, Indonesia

Abstract
Water infiltration phenomenon through ground surface into the vadose zone is often described by a water ponding model. The description has been presented by researchers, but less of them have illustrated infiltration into homogenous soil of various grain sizes. The aim of this study is to compare water content distribution and the speed of wetting zone in Silica Sand soil of various grain sizes based on the purely physical movement approach. In this study, an infiltration process was simulated in a precisely soil column apparatus, which was used as a physical model; it had a height of 50 cm and a diameter of 15 cm. The water content distribution was illustrated by using numerical simulation based on Richards equation that was solved by finite different method with Crank-Nicolson scheme. Meanwhile, the function of water retention curve of the soil was predicted following van Genuchten parameters from measured logarithmic scale of negative soil water tension and water content values. The simulation results indicated that the speed of wetting fronts is decreased proportionately between soil size and ponding time that are apparent by means of comparison in logarithmic pattern. This simulation was refining the previous water-ponding model of natural sand, silt and clay soils.

Keywords
infiltration; water-ponding; water-content; soil-column; soil-water

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/eE6TGZjh7LQ4

Corresponding Author
Dian M Setiawan

Institutions
Universitas Muhammadiyah Yogyakarta

Abstract
Indonesian Railway Authority plans to build a double railway track between Bandung-Cibatu which is currently the densest service line in Bandung Regency. Cicalengka Station is one of the major stations in this line service. This study aims to plan the train traffic arrangement at Cicalengka Station. The Conflict Rate Matrix Table was used as a simple simulation method to analyse the train journey route (formed, used, conflicted) and the degree of route usage against train frequency. The results showed that the Cicalengka Station on double track system would be passed by 98 passenger trains and planned to have two primary tracks (II and III) which are used for the direct train journey through the station. Track I, IV, V, and VI are the siding tracks that used for a railway stop. Cicalengka Station is also planned to have a route that is formed and is used each amounted to 10 routes (A to J). The conflict degree is 0.84, and the degree of route usage against train frequency is 0.75. Furthermore, it can be concluded that the percentage of non-conflicted route increased from 16% to 25%.

Keywords
conflict degree, railway double track, route, station, train traffic arrangement

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/wkXgADndMU89

Corresponding Author
Novitasari Novitasari

Institutions
(a) Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No 2, Yogyakarta, 55281, Indonesia
(b) Department of Soil Science, Faculty of Agriculture, Universitas Gadjah Mada, Jl. Flora, Bulak Sumur, Yogyakarta, 55281, Indonesia

Abstract
Abstract Peatland is a unique ecosystem with a very high diversity. However, peatland is vulnerable ecosystems. It is easy to damaged and difficult to be restored. There are many wildfires in tropical peatlands from the year 1997 to 2018. The research presented took place in Ex Mega Rice Project in Central Kalimantan, Indonesia. This research aims to find a correlation between dry days as a meteorological aspect in wildfires phenomenon based on water balance in tropical peatlands. Quantitative method used in this research provides information about the dry days characteristics to drought index in peatland wildfire management in Central Kalimantan. The rainfall decrease is one caused by the impact of El Nino in Indonesia. It is lead to drought in tropical peatland. The achieved results revealed that the meteorological drought was occurring periodically. In the light of the presented calculations and analyses supported by the literature review, it can be assumed that drought threat is intermittent and not always is caused by a local meteorological. Extremely dry day lead to drought. Drought lead to wildfire, especially in tropical peatland. A comprehensive approach also include the influence of internal factors, which periodically strengthen or weaken the relationships in this research.

Keywords
Drought, Dry Day, Wildfires, Peatland

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/ERKueFz3MZa6

Corresponding Author
Ahmad Zaki

Institutions
(1)
Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Bantul, Yogyakarta 55183, Indonesia, ahmad.zaki[at]umy.ac.id

(2)
Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia, zainah[at]um.edu.my

(3)
Department of Mechanics of Materials and Constructions, Vrije Universiteit Brussels, Pleinlaan 2, Brussels 1050, Belgium, daggelis[at]vub.ac.be

Abstract
The acoustic emission (AE) technique, one of the NDT (non-destructive method), is more effective for assessing corrosion in the concrete structures. The main objective of this study is to utilize the AE technique for assessment of pre-corroded concrete specimens under load testing. The experiments were utilized for small scales of pre-corroded specimens subjected to monotonic loading for AE signals. For the result of the experiments, the AE parameters include the AE hits, RA value, and AF of the AE data were successfully introduced to assess the flexure behavior of the pre-corroded beam specimen. The experiments conducted in this research helped to understand the flexural behavior of the pre-corroded specimen under loading test using the AE technique.

Keywords
AE, NDT, corrosion, concrete, flexural behaviour

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/9rqbFZJRMQgA

Corresponding Author
Yoyong Arfiadi

Institutions
(a) Department of Civil Engineering, Universitas Atma Jaya Yogyakarta
*Corresponding author: yoyong.ar[at]uajy.ac.id

Abstract
Shallow foundations are commonly used for low-rise buildings. The column axial loads and moments are transmitted to the soil through a reinforced concrete pad. The size of the pad as an isolated footing depends on the bearing capacity as well as the base column loading. In this paper, the bearing capacity of the soil is taken from Terzaghi formula so that designing the size of the footing is not straightforward. This is because the soil bearing capacity depends on the soil properties, and the depth and width of the footing. Therefore, the soil bearing capacity and the width of the footing should be obtained iteratively. This condition is coupled with the thickness and reinforcement of the concrete footing to resist shear and bending moment and to attain the optimum design. To solve the problem and to obtain an optimum design, a genetic algorithm (GA) is used. The objective is to design a square concrete footing to minimize the cost of the foundation. Two cases are considered in this paper. The first case is when the depth of footing is decided before hand by the designer. In this case only the width of the pad, the thickness of the concrete, and the amount of the reinforcement have to be obtained. The second case is when the width of the pad, the thickness of the concrete, and the amount of the reinforcement as well as the depth of the footing should be obtained as the design variables. For both cases the optimum design can be achieved by using genetic algorithms.

Keywords
shallow foundations, concrete footing, genetic algorithm, optimization

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/6YaFwLPQRb7C

Corresponding Author
Guntur Nugroho

Institutions
a,b) Department of Civil Engineering, Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, Yogyakarta 55183, Indonesia.
*guntur.nugroho[at]umy.ac.id

Abstract
Based on the theory of damping energy dissipation, a damping concrete is made by choosing suitable rubber, additives, filling material and reasonable mixture ratio. The comparative experiments are made between normal concrete and rubber concrete, including damping performance and failure character. The specimens consist of four reinforced concrete beam by using variation of the concrete mixes. Natural sand in the concrete mixes was partially replaced by using recycled rubber powder of 5%, 10%, 15%, and 20% respectively. The specimens were vibrated using hammer impact and damping was recorded by using accelerometer sensor. The results of analysis show that the dumping of the rubber concrete structure was improved observably compared with that of the normal concrete structure.

Keywords
rubber concrete, accelerometer, damping.

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/ACP7kcf8hxrg

Corresponding Author
Ratnasari Ramlan

Institutions
1Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Bulaksumur, Caturtunggal, Daerah Istimewa Yogyakarta, Indonesia
*ramlanratnasari[at]gmail.com

Abstract
Indonesian Highway Capacity Manual (IHCM) is used as a guideline for calculating delays and queues at unsignalized intersections. Since it was published in 1997, there has never been an update on IHCM. The aim of this study is to improve the IHCM formula to calculate the delay and queuing in unsignalized intersections. Traffic data on 8 cities in Indonesia has been collected, then a delay and a queue calculate using the IHCM formula. The results of the assessment are based on calculating using IHCM formula, delay values and queues are different from field values. The high level of mayor road traffic flow (> 3000 vehicles / hour) and minor (> 800 vehicles / hour), as well as the right and left turn ratio (> 10%) is one of the reasons that the calculation in IHCM becomes inappropriate. Furthermore, by comparing the results of calculations with the results of the field, it appears that motorcycles determine the composition of vehicles at the intersection, so it has been improved the value of passenger car equivalent for motorcycles. In addition, it was also approved to improve the value of base capacity for unsignalized intersection.

Keywords
IHCM, Unsignalized Intersection, Capacity, Delay, Queue

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/j6hCw2tfWagb

Corresponding Author
Fathoni Usman

Institutions
(a)Universitas Indo Global Mandiri, Palembang 30129, Indonesia
(b)Institute of Energy Infrastructure, Universiti Tenaga Nasional, Kajang 43000, Selangor, Malaysia
fathoni[at]uniten.edu.my

Abstract
Palembang City is located at lowland where 70% of the city has an elevation from 0 to 5 m above mean sea level. With tremendous development and land use change, Palembang City has faced more problems with a flash flood and a larger inundated area. This paper presents a study on the subsidence on Palembang City using remote sensing data. The SAR data set and the optic data set were used in this study. From the study, it is found that within a decade the land use changing in Palembang City obviously a presence. The land subsidence causes the further problem of inundated area worsens the existing runoff water discharge which controlled by the tide of Musi River. The predicted inundated area due to land subsidence is presented in this paper as well.

Keywords
Remote sensing; Land subsidence, Land use changing, Flood

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/MJeLHG2EgyKR

Corresponding Author
nursiah chairunnisa

Institutions
(a) Civil Engineering Program, Engineering Faculty, Lambung Mangkurat University, Indonesia
nursiah.chairunnisa[at]ulm.ac.id

Abstract
Self-compacting concrete (SCC) is a type of concrete which can spread grout of concrete into the mold or formwork without the need of vibrator. Assessing the properties of the grout of SCC is an essential factor for the successful of SCC technology. The objective of this study was to evaluate the effectiveness of various coarse aggregate sizes, and chemical admixtures in producing of SCC. There are three main factors to determine the capability of fresh grout of concrete as SCC namely filling ability, passing ability, and segregation resistance. For this purpose, two chemical admixtures that contain 0.5%, 1.0% and 1.5% by weight of cement also two sizes and percentages coarse aggregates were investigated. Cylindrical molds of 100x200mm were utilized to cast cylinder specimens. Workability of grout concrete was investigated with using Flow test, J-Ring, and L shape test that based on EFNARC standard code for determining fresh concrete and compressive test of hardened concrete. To achieve the objectives of research, casting, and testing of the various type of SCC mixture was carried out. The test results will be compared with different code values for determining the properties of fresh and hardened concrete of SCC

Keywords
coarse aggregate, characteristics SCC, chemical admixtures, cylinder specimens, fresh and hardened concrete

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/h2nUDw8LgCuN

Corresponding Author
Gito Sugiyanto

Institutions
1 Jenderal Soedirman University, Civil Engineering Department, Mayjend Sungkono Street km.5, Blater, Kalimanah, Purbalingga, Central Java, Indonesia.
2 Health Polytechnic Ministry of Health of Yogyakarta, Mangkuyudan Street MJ III/304 Yogyakarta, Indonesia.

Abstract
Provision of infrastructure that encourages national connectivity will reduce transportation costs and logistic costs so that it can increase product competitiveness and accelerate the economic growth. Application of the optimum hub and spoke airport model will improve the efficiency of transportation costs and the effectiveness of air transport logistics distribution. The efforts are made by examining the parameters or criteria used to establish an airport as a hub airport. The aim of this research was to determine the parameters or criteria for establishing an airport as a hub airport using Analytical Hierarchy Process (AHP) method. The study location was in five international airport designated as Open Sky airport in Indonesia namely Soekarno-Hatta International Airport in Cengkareng, Kuala Namu International Airport in Deli Serdang, Juanda International Airport in Surabaya, Ngurah Rai International Airport in Denpasar, and Sultan Hasanuddin International Airport in Makassar. Five parameters or criteria for determining an airport become a hub airport i.e.: airport charges/cost, cargo handling capacity, time used for handling cargo, value-added service, and location and infrastructure aspect. The most influential parameters or criteria is airport charges/cost that include: landing fees, airport parking fees, and security charges with the value weight is 23.76%.

Keywords
Hub and spoke; airport; cargo handling; airport parking fees; Analytical Hierarchy Process

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/8fkBnpvEcYXq

Corresponding Author
Esti Wulandari

Institutions
a) Doctoral Program on the Department of Civil, Faculty of Engineering, University of Brawijaya,
Jl. MT Haryono No 167 Malang-Indonesia
*estiwlndr[at]gmail.com

b) Department of Water Resources, Faculty of Engineering, University of Brawijaya,
Jl. MT Haryono No. 167 Malang-Indonesia

Abstract
Nakayasu synthetic unit hydrograph is one of some unit hydrograph methods that is widely used in the analysis of design flood in Indonesia. The Nakayasu synthetic unit hydrograph method requires relatively a little data and the results still need to be tested regarding to the reality. Following the various studies related to alfa parameter that have been carried out, these parameters, are still not optimal and only valid in the certain locations, so the formulation is needed to determine the value of alfa parameter that is adjusted to the physical watershed characteristics in Java. This study aims to develop a model of alfa parameter that is related to the characteristics of watersheds in Java Island. The watershed characteristics consist of watershed shape, watershed area, slope, and river typology (length of river and bed slope). The alfa parameter development is generated from the statistical analysis for several watershed characteristic variables that have a significant effect. The model of alfa parameter is hoped to be a function of the watershed characteristic variables with the general equation is as follow: alfa = f (river length, slope, area, perimeter, watershed shape).

Keywords
alfa parameter, Nakayasu, watershed characteristic, Java Island

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/Xw4V8BHbYa96

Corresponding Author
Widodo Budi Dermawan

Institutions
(a) Department of Civil Engineering, University of Indonesia
Jl. Margonda Raya, Kota Depok, Jawa Barat 16424, Indonesia
*wbdermawan[at]gmail.com

Abstract
Road safety is one of the most important things in carrying out transportation. One effort to improve road safety is to reduce the number of traffic accidents. By knowing the accident data at a location, transportation planners can conduct analysis so that they can provide recommendations for improvements, handling and strategies for improving road safety. However, the prediction model in Indonesia in some studies is more local purposes. Meanwhile the prediction model used in various countries needs to be adapted to the conditions of Indonesia. This study aims to develop Safety Performance Functions (SPFs) for estimating the number of traffic accidents that can be used to predict the number of accidents on national rural road segments by looking at the characteristic of road condition in Indonesia with the Generalized Linear Model (GLM) approach and Empirical Bayes (EB). The availability of data in the form of a web-based accident database from the National Police Corps and the time series data from 8 provinces in Indonesia allows this research to be carried out. The model developed is expected to function as an evaluation tool and decision maker in its contribution to improving road safety in Indonesia.

Keywords
Accidents, Empirical Bayes (EB), GLM, National Roads

Topic
International Symposium of Civil, Environmental, and Infrastructure Engineering

Link: https://ifory.id/abstract/jCKWMNmQXwHY