bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of adding silica fume for lightweight concrete brick in terms of strength criteria
Authors: Jusi U , Maizir H , Fadil A 
Published: April 2021

Abstract
Technological developments in the property sector at this time, especially on the walls are lightweight bricks. To find out the extent of the behavior of the characteristics of lightweight bricks, a study of compressive strength and absorption was carried out using materials such as cement, sand, foam agents and silica fume. Research with the addition of silica fume of 5%, 10% and 15% of the weight of cement at the age of 7 days, 14 days and 28 days based on the standard technology planning module of mortar foam material for road construction. Comparison of light brick free compressive strength from normal light brick to lightweight brick with optimum free compressive strength, namely in light brick the addition of silica fume 5%. The results of free compressive strength at the age of 7 days with the addition of silica fume 5% increased by 41% from normal lightweight brick free compressive strength. At the age of 14 days the compressive strength of light-free bricks with the addition of silica fume 5% increased by 57% from normal light bricks and at 28 days increased 41%. The lowest absorption occurs on the use of silica fume 5% with a value of 36%.
Research studies on composition of porous concrete on the sidewalk
Authors: Megasari S W , Yanti G , Zainuri Z 
Published: April 2021

Abstract
In infrastructure development, technology is needed that is powerful, effective, efficient in implementation time, efficient, and environmentally friendly. Porous concrete has a cavity that can flow water directly into the ground so that it can overcome the problem of water absorption. Porous concrete can be utilized in the pavement with light traffic loads such as the sidewalk. However, because porous concrete only consists of a mixture of cement, water, and coarse aggregate, porous concrete has a low compressive strength. The research is needed on the composition of porous concrete to be used on the sidewalk. Research using the ACI-522R-10 method with a variation of the ratio of cement and coarse aggregate is 1: 3, 1: 4, 1: 5, 1: 6 and cement water factor 0,30. The test results obtained the highest average compressive strength value of 16.027 MPa with an increase of 45.30% compared with no additives, as well as being in the classification of concrete brick of C quality which is suitable for the sidewalk. The results showed that an increase in the average compressive strength value along with a reduction in the amount of coarse aggregate was obtained both under conditions and with the addition of additives.
Schematic of monotonic shear test for hollow circle elements no stirrups
Authors: Dewi S H , Thamrin R , Zaidir Z , Haris S 
Published: April 2021

Abstract
The shear behavior of reinforced concrete beams with circular cross-sections is different from beams with rectangular cross-sections. Most shear formulations designed for circular parts are based on rectangular sections. This study aims to obtain a scheme for testing the hollow circle elements without stirrups by simple structural analysis. There were two layouts analyzed before an experiments. Layout A is an element with one hole in the middle, and B is an element with two holes at the end of the element. This study was by trial and error structural analyzed. The elements had set up with two vertical loading points and two placement points with different positions. The result is the distance between loading and placement with an equal moment. The shear force in layout B is greater than the shear force in layout A.
The effect of tire ash to the compressive strength of concrete
Authors: Harmiyati H , Dewi S H , Junaid J 
Published: April 2021

Abstract
The purpose of this study was to determine the effect of the addition of tire ash as a partial replacement of cement for concrete slumps. This study has experimented with cylindrical specimens with a diameter of 150 mm and a mixture length of 300 mm. It was planned to establish a cement water factor of 0.49 with the concrete compressive strength 25 MPa and a reduction plan of 60-180 mm, the percentage of tire ash substitution from the weight of cement 2.5%, 5%, 7.5%, and 10%, the cement used in this study was PCC type I cement from PT. Semen Padang. The results of the use of tire ash as a substitution showed that the greater the addition of tire ash, the greater the value of the slump obtained, meaning that the concrete produced is thinner so that it can facilitate the processing and compaction process. The use of tire ash cannot influence the increase or the same as of the concrete compressive strength and cannot be used as a substitute or reduction in the use of cement with the type I composite cement produced by PT. Semen Padang. Further research is needed on the content of the physical and chemical properties of tire ash.
The potential of polymer for enhanced oil recovery process on oil refinery: A literature research
Authors: Setiati R , Malinda M T , Sabrina J 
Published: April 2021

Abstract
The objective of this research is to obtain evidence that polymer can be utilized as injection fluid in Enhanced Oil Recovery process. Polymer is one of chemical compounds in Chemical Enhanced Oil Recovery (CEOR). The method utilized in this research is reference collection regarding Enhanced Oil Recovery which further observed and reviewed, especially the ones connected with polymer utilization as injection fluid. Polymer injection is a method conducted after primary and secondary recoveries processes. The clearest and most significant mechanism of polymer application is to improve sweep efficiency by decreasing thickness level and improving water injection profile. Polymer injection is a tertiary recovery step, conducted after oil can no longer be produced although the capacity only reaches 60%. This means that there is still 40% of total capacity yet to be produced. This polymer injection is commonly utilized to obtain remaining oil reserve because of its relatively simple application, low cost, and able to produce a relatively large volume of oil reserve.
The effect of applying waste cooking oil to the pore value of pavement
Authors: Alfian S , Muthia A 
Published: April 2021

Abstract
In this study, additive of waste cooking oil waste in the Asphalt Concrete-Wearing Course (AC-WC) mixture emphasizes the pore content of the asphalt mixture. In this study the application of waste cooking oil waste by 1%, 2%, 3%, 4%, and 5% of the optimum asphalt content. Judging from the mixed pore content in this study, it was found that by adding 1% the pore value was 4.61%; an additional 2% obtained a pore digit value of 4.64%; an additional 3% obtained a pore number value of 5.22%; at the addition of 4%, the pore value is 11.10%; and the addition of 5% obtained a pore number value of 11.47%. This indicates that the greater the level of addition of waste cooking oil waste, the higher the pore value obtained so that the mixture is less impervious to water and air so that the mixture will be more easily absorbed by water and oxidized. Thus resulting in accelerating the aging of the asphalt.
Synthesis method of chitin become chitosan polymer from shrimp shells for enhanced oil recovery
Authors: Setiati R , Siregar S , Wahyuningrum D , Rinanti A 
Published: April 2021

Abstract
The purpose of this study was to examine the benefits and procedures for making chitosan polymer from chitin found in shrimp shells. This initial research aims to synthesize chitosan membrane from chitosan powder and its characteristics. Chitin is the main organic material found in groups of crustaceans, insects, fungi, molluscs and arthropods animals. Crab, shrimp and lobster shells have long been known as sources of chitin production as their chitin content is quite high. Chitin is the second most abundant natural biopolymer after cellulose. This non-toxic natural biopolymer is produced commercially from shrimp and crab shell waste. Chitosan powder is prepared from shrimp shells through deproteination, demineralization and deacetylation processes. Chitosan is characterized by conducting tests of water content, ash content, nitrogen content, viscosity, degree of deacetylation, analysis of functional groups by IR spectroscopy and crystallinity by X-ray diffraction. Chitosan characterization is seen from physical appearance, functional group analysis and crystallinity. The potential application of chitosan, as a deacetylated chitin derivative is multidimensional in nature, such as in food and nutrition, biotechnology, materials science, medicine and pharmacy, agriculture and environmental protection. Chitin isolation from shrimp shells and its synthesis into chitosan, makes shrimp shells more beneficial for other fields. One of the applications of chitin is as chitosan polymer, which is used as an injection fluid in the field of Enhanced Oil Recovery.
Development of tsunami inundation map for the coast of Palu City
Authors: Purnama M R , Adityawan M B , Farid M , Chrysanti A , Rayadi B T , Suryadi Y 
Published: April 2021

Abstract
The 2018 Sulawesi Earthquake and Tsunami severely damaged the coast of Palu City, Indonesia. The city did not have adequate mitigation system for a tsunami. A tsunami inundation map is required. This study based on modelling four scenarios of possible earthquake-induced tsunami. The earthquakes were identified based on data from PUSGEN. The generated tsunami wave is simulated using Delft3D and Delft Dashboard. The wave propagation is modeled using nesting method. This method couples different grid sizes. Nesting process helps to ensure the model efficiency and accuracy. The results provide the maximum inundation map along the Palu City Coast. These results can be used by decision maker to develop the coastal zone management of Palu City. Furthermore, they can be utilized to propose a disaster risk management plan.
Comparison of Taylor Galerkin and FTCS models for dam-break simulation
Authors: Hafiyyan Q , Adityawan M B , Harlan D , Natakusumah D K , Magdalena I 
Published: April 2021

Abstract
The aim of this paper is to compare the ability of two numerical models to simulate two-dimensional dam-break flows. Dam-break modelling is important in reducing the high-risk of dam failure by determining the water flow movement and its effect on buildings downstream. In this study, the Taylor Galerkin and Forward Time Central Space method is presented to simulate 2-D dam-break flow. The Hansen filter is applied to both methods to reduce numerical instability oscillations in the model. The filters were used for each time step at each computing point. The model is verified by comparing the result simulation with numerical results from previous studies. The result show that Taylor Galerkin numerical scheme with Hansen filter is successful to simulate the problem of 2-D dam-break. Also, the Taylor Galerkin model has better results than the FTCS model. Studies like this are needed for mitigation efforts in the event of dam failure.
Impact of transportation on urban compactness index in South Tangerang City, Indonesia
Authors: Aulia P L , Taki H M , Wartaman A S 
Published: April 2021

Abstract
This study aims to identify the impact of transportation on the urban compactness index in South Tangerang. The urban form of a compact city was influenced by transportation. The implement of a compact city is necessary to measure the impact of transportation as a variable of this paper itself. This paper uses quantitative statistical methods to identify the effect of transportation on the urban compactness index. The variables used include Urban Compactness index, road networks, public transportation routes, public transport services, and public transportation accessibility. The results of this research indicate that, first, there is a positive influence on the arterial road density and the distance from the farthest houses to the bus stop, and second, the ratio of the length of public transport routes has a negative effect on the Urban Compactness index were the proportion of routes in areas which not served by public transport networks will make the areas not compact. The conclusion is the linkages between regions from a transportation system connected to the road network indicate that travel distances tend to be shorter in a compact city, so the three factors could be a reference to optimizing development in the application of Compact City in South Tangerang City.
Optimal location for online motorcycle taxi shelter at Bekasi Train Station
Authors: Pangestu R R , Taki H M , Situmorang R , Supriyatna Y 
Published: April 2021

Abstract
In some locations such as in this study are stations, online motorcycle taxi requires a shelter or a special location to conduct their activities, such as drop off and also pick up to maintain regular traffic so as not to cause congestion and create orderliness in transportation activities. In this study, the optimal shelter location at Bekasi Train Station will be searched using the weighting method, that is using rank sum weight, where respondents will be given preference questions with a scale of 1 to 5 on each particular indicator where the number of ratings will get preference ranking of each indicator which can be calculated its weight by a formula and gives a score to each indicator with a value of 1 to 3 which is assessed from the physical condition of each indicator in this study. Where in this study in finding the optimal location five indicators will be used namely Distance, Landmark, Comfort, Safety, and Orderliness. In searching for the weighting of the correspondents on the preference questionnaire are users and drivers of online motorcycle taxi. From the assessment, it can be seen that the most optimal location to pass the drop off is to be in Indomart Juanda with the highest weighting preference at the drop off is the landmark and then the distance from the station, and the most optimal location for ordering an online motorcycle taxi is located Indomart Juanda with the most weight preference in motorcycle taxi booking online is the landmark and the safety.
COVID 19 in gated community at Jakarta, Indonesia
Authors: Seanders O , Maroofi H 
Published: April 2021

Abstract
This study aims to evaluate how far the principles of Gated Community can break the chain of the spread of the COVID19 virus. In 2020, the world was widely shocked by Coronavirus (COVID19), which started in Wuhan, spread throughout the globe without exception to Indonesia. As one of the busiest cities in Indonesia, Jakarta becomes one of the gateways for COVID19 in Indonesia. The outbreak of COVID19, made the Jakarta City Government implement a quarantine system policy, which has an impact on the daily lives of Jakarta’s inhabitants. This situation causes the inhabitants’ community only to be able to move around in their neighborhood. The access restrictions for outsiders of residence arose so that some settlements in Jakarta imposed a gated community system. The research method used is a qualitative method, which is carried out with literature and observation studies. The data used comes from several regulations issued by the government regarding the COVID19 pandemic and phenomena in the field. The research location is the Kelapa Gading. This region is a residential area with a majority of the gated community, in the area of the gated community housing can prevent or even break the COVID19 chain in the study area.
Stakehoder’s involvement in the successful development of ecovillage Cibodas, Bandung - Indonesia
Authors: Melati I , Yuslim S , Indrawati E 
Published: April 2021

Abstract
The success of sustainable development, especially in rural areas, is strongly influenced by the involvement of stakeholders from the early stages (planning). Several studies in Europe show that stakeholder participation can be relied on in further management by facilitating the fulfillment of stakeholder expectations or needs. The acceleration of rural development by the government in Cibodas Village, Bandung towards an Eco-village requires stakeholder involvement. The purpose of this research is to provide a reference on the expectations/expectations of the facilities and infrastructure needed by stakeholders and the involvement of stakeholders for efforts to improve the village economy through Eco-village development. Location of research, in the area of “Rukun Warga” (RW) 12. This research uses qualitative observational and descriptive methods. Then quantified on a Likert scale. The data collection instrument used a questionnaire through purposive sampling. The results showed that stakeholder expectations were very high, as seen from the number of responses that demanded infrastructure improvements related to the development of an Eco-village in RW 12. These findings could become the basis for the design and development framework of the Eco-village in RW 12, Cibodas Village, Bandung.
Analysis of indoor and outdoor particulate (PM2.5) at a women and children’s hospital in West Jakarta
Authors: Yulinawati H , Khairani T , Siami L 
Published: April 2021

Abstract
Air quality monitoring is very important to provide public information about the impacts of air pollution on health, especially in health centers. Particulate less than 2.5 micrometer (PM2.5) is the main parameter of air pollution. This research aims to measure indoor and outdoor PM2.5 at a women and children’s hospital in West Jakarta. The method for collecting data of PM2.5 was with a low-cost sensor (LCS), which also collected temperature and humidity data. The LCS was collocated with two ambient air quality monitoring stations (AQMS) as the references. Field measurements at hospital were conducted for three months. The data are statistically analyzed with the openair model. The results show that LCS and AQMS followed a similar trend. Outdoor PM2.5 concentration is always higher than indoor. Peak hourly outdoor concentrations usually occur around midnight (24:00–03:00). The indoor peak concentrations are between 06:00–12:00. The indoor PM2.5 tend to be stable, while the outdoor varies throughout the day. The ratio of PM2.5 concentration (24-hour) indoor to outdoor is 0.8. In conclusion, the relation between indoor and outdoor air pollution is still not comprehensive due to temperature and humidity factors. All indoor and outdoor PM2.5 are above WHO Air Quality Guideline.
Risk analysis of hearing loss among the employees in ceramics sanitary industry
Authors: Sintorini M M , Wibowo F A , Suswantoro E , Sinaga E 
Published: April 2021

Abstract
Industrial sector has a high risk of work accidents. So, it is necessary to apply occupational health and safety management to monitor the work process. The aims of this study are to evaluate and analyze the risk of noise exposure in the production process at sanitary industries. The study was conducted in the sanitary ceramics industry which produces sanitary equipment, in the production area and other sanitary equipment. The method used was cross sectional design study, there was seven samplings location and 98 respondents to determine the perceptions of health risks. The results obtained that the highest noise is 101.9 dB (A) in the forging section, 92.6 dB (A) in the casting section, 91.7 dB (A) in polishing belt section, and 89.6 dB (A) in polishing section buff. According to The Government No. 13/2011 the noise quality standard for the industry at 80 dB (A). The highest risk of noise exposure is to complaints of headaches (OR = 2.44), high blood pressure (OR = 1.24), fatigue (OR = 2.21), hearing loss (OR = 1.99). Suggestions that can be given are the need for training and outreach to workers about the risks associated with specific work on 8 hours work noise exposure to avoid work accidents.
Evaluation on the sanitation facilities in the Gegerkalong Traditional Market, Bandung, Indonesia
Authors: Mulyatna L , Wahyuni S , Wilantri R N , Yustiani Y M 
Published: April 2021

Abstract
Big cities in Indonesia still have many traditional markets whose activities and transactions are carried out directly person to person. The Gegerkalong Market is a traditional market with high activity due to the dense surrounding population. Traditional market activities require the availability of sanitation facilities to support commercial and domestic activities for sellers, buyers and visitors. This study aims to evaluate the sanitation facilities in the Gegerkalong Market, Bandung, Indonesia. The method used in this study is direct observation and data collection through questionnaires. The observation results were checked and analyzed with the reference requirements contained in the Decree of the Republic of Indonesia Minister of Health No. 519/Menkes/SK/VI/2008. While respondent data is processed using a Likert scale to obtain the level of satisfaction of respondents with sanitation facilities. Sanitation facilities observed included the provision of clean water, waste management, sewerage and drainage conditions, sales stall conditions, toilets and hand washing facilities. Based on the evaluation conducted, it was found that the condition of the Gegerkalong Market sanitation facilities was categorized in the unfavourable state. Nevertheless, respondents were satisfied with the existing facilities because they were already familiar with the existing conditions.
Knowledge-attitude-practice method analysis as a guide for Kasomalang Kulon Village waste bank planning
Authors: Pradiko H , Wahyuni S , Ganiy W A 
Published: April 2021

Abstract
Waste management is a systematic, comprehensive and sustainable activity that includes the reduction and handling of waste. Waste bank is one of the strategies to implement 3R in waste management at the community level. The Hamlet 01 of Kasomalang Kulon Village has not yet a proper procedure to treat and manage the solid waste. The objective of this research is to analysis the readiness of the community to operate the waste bank. The sampling method used is Non Probability Sampling with Purposive sampling technique. The condition of the community’s readiness for waste management is obtained by the KAP (Knowledge, Attitude, Practice) method. KAP results are showing that the level of community knowledge is high with positive attitudes, and practices are also high. This indicates that the community is ready to manage household waste, including operating a waste bank.
Evaluation of solid waste management operational techniques in Kebonsari Urban Village, Citangkil sub-district, Cilegon City
Authors: Hasianetara S , Indrawati D , Purwaningrum P 
Published: April 2021

Abstract
The increase of population is equal to the increase of solid waste generation. Domestic solid waste generation that is not managed properly will cause problems. Solid waste management in Kebonsari Urban Village, Citangkil Sub-District, Cilegon City still uses the old paradigm (collect-transport-dispose) and low service level. This study aims to evaluate solid waste management activities from storage, collection, and transportation to the final disposal. This study used the method of field observation to analysis current service coverage and compare operational technical conditions in Kebonsari Urban Village with SNI 19-2454-2002 of Operational Techniques of Municipal Solid Waste Management. Data analysis was performed by calculating based on SNI 3242-2008 Residential Solid Waste Management. The results showed that only 41% of the population of Kebonsari Urban Village were served, this was due to the fact that there were still many people who did not put garbage in their bin and solid waste operational techniques in Kebonsari Urban Village were still not entirely applying SNI 19-2454-2002 one of them is shown by the low participation of the community in solid waste management. The average of solid waste generation in Kebonsari Urban Village are 0.71 l/person/day or 0.12 kg/person/day and the solid waste composition are 60.2% organic and 39.8 inorganic.