Journal of Sustainable Civil Engineering and Technology最新文献

{"title":"The Efficiency Assessment of Poly-Aluminium Chloride (PAC) in Water Treatment Plant Process: A Case Study at Sultan Iskandar Water Treatment Plant, Johor","authors":"Aina Asyura Azhar, N. F. Haron, Herda Balqis Ismail","doi":"10.24191/jscet.v1v2.8-16","DOIUrl":"https://doi.org/10.24191/jscet.v1v2.8-16","url":null,"abstract":"The rate of population growth and river pollution are significant factors contributing to the increase in water demand in Johor. Generally, this may affect the quality of water treated at one of the biggest water treatment plants in Johor namely Sultan Iskandar Water Treatment Plant (SIWTP). The coverage of SIWTP water supply is wide and comprise almost all area of Pasir Gudang and half of the Johor Bahru district. This situation indirectly affects consumer demand when the treated water is insufficiently supplied by the potable water supply provider due to the use of conventional coagulants in the water treatment plant process. Therefore, this is an initial study as the Poly-Aluminium Chloride (PAC) coagulant is still in the early stages of implementation at SIWTP. It is important to determine the performance of PAC coagulant in the coagulation-flocculation process of the water treatment plant. The PAC performance is compared to Aluminium Sulphate which is a common type of coagulant used in the treatment plant, in order to establish efficiency. A pH adjustment test, turbidity test and the residual Aluminium test were conducted for both coagulants and six jar test readings were recorded to plot the comparison graph between PAC and Alum coagulants. The results showed that PAC is more efficient with 83.74% as compared with Alum which has an efficiency rate of 83.35%. Even though the difference is too small, it is concluded that PAC has better performance and is more efficient compared to Alum due to its better coagulation performance. In addition, PAC produces lesser residual Aluminium and required a lesser amount of dosage. This may reduce cost and therefore save overall operating costs.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129433249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Review on Strength Related of Malaysian Coastal Corroded Subsea Pipelines","authors":"Mohd Fakri Muda, M. H. Mohd, M. M. Mohd Hashim, M. Kamarudin, Zainul Faizien Haza, M. Abdul Rahman","doi":"10.24191/jscet.v1i1.20-28","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.20-28","url":null,"abstract":"This study aimed to present a numerical analysis to assess the corrosion factor influencing the residual burst pressure and stress behaviour of Malaysian coastal subsea pipelines. Statistical analyses were carried out to investigate the correlation of point damage location and position of defect area to the burst pressure which was determined using DNV RP F101 codes. Eight critical models were analysed by using finite element method to access the stress behaviour. Based on the results, it was observed that critical frequency of corrosion happened at three locations (i.e. 50 m, 900 m and 1500 m) and most of it occurs at the upper region of the pipeline's wall. Furthermore, the stress behaviour indicates larger defect influence more compared to small defect with a ratio of width cause greater stress than the length of defect. In short, this study provides a focus area in the Malaysian oil industry specifically in subsea pipelines chainage for future research development and rehabilitation assessment.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129333321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Evaluation of Smart Selangor Bus Service Efficacy","authors":"J. Md Diah, Noraishah Akhirruddin, Raha Abd Rahman","doi":"10.24191/jscet.v1i1.1-8","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.1-8","url":null,"abstract":"Smart Selangor Bus (SSB) is a free bus service that is a local government initiative as one of the most effective measures for its citizens. It aims to improve the quality and transport system in the state of Selangor. The SSB serves as one of the public transport vehicles carrying passengers around the city without charge regardless of age, occupation, gender or nationality. The purpose of this research is to determine the factors that can contributed to commuter satisfaction and evaluate an effectiveness on subsidized fare free public transport (FFPT) services provided. Data for the study were gathered through questionnaire among passenger of SSB on socio-demographic characteristics, travel behaviour characteristics and question of willingness to changes the mode of transportation and rider’s data depends on type of routes from Klang Municipal Council (MPKlang). The Cronbach’s Alpha test shows that the value is α>0.7 which is it showed the questionnaire to reach the high reliability. The results of this study show that an effectiveness of SSB is significantly related commuter satisfaction on bus stop cleanliness and comfort, bus cleanliness, comfort and safety of the bus and also punctuality and other facilities and also related to the increase in the number of riders every month. Those factors that can contribute to the commuter satisfaction further affect the willingness of Klang residents to switch to public transport mode options and continue to enjoy this free fare public transport facility and at the same time increase the effectiveness of SSB service. These findings provide a vision for better management to SSB stakeholders, especially to funders na","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130076047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential of Coal Bottom Ash as Fine Aggregates in The Production of Lightweight Brick","authors":"M. Arshad, Warid Wazien Ahmad Zailani, Anuar Abdul Wahab, Salmia Beddu Fauziah Aziz, S. Abdullah, A. Adesina, R. Suryanita","doi":"10.24191/jscet.v1i1.42-49","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.42-49","url":null,"abstract":"The use of coal bottom ash, a by-product from the coal burning process in lightweight bricks production is getting more attention worldwide including in Malaysia. The main objective of this research is to assess the extended potential of bottom ash to produce lightweight bricks. The green technology-based lightweight bricks in this study are designed using the by-product resulting from the burning of pulverized coal in thermal power plants for electric power generations. The burning of pulverized coal was questioned extensively over the last decades due to the carbon dioxide emission which is about 2.0 billion tons annually. These lightweight bricks are produced from the combination of specifically graded bottom ash, classified pozzolanic ashes, fine aggregates, Ordinary Portland Cement, and water. The lightweight bricks were subjected to a few laboratory assessments including compressive strength test, density test, and water absorption test. It was observed that the C2 brick and C3 brick at 60% and 100% addition of bottom ash, respectively had comparable compressive strength with other commercialized bricks (cement-sand brick and clay brick). The addition of coal bottom ash also produces the lowest density of the bricks which is about 1.2 kg/m3. Comparison with other commercialized bricks available in the market in terms of compressive strength, density, and water absorption indicated that the bottom ash-based bricks are stronger and lighter. A comprehensive selection of good quality materials and the selected mix design produced an acceptable quality of bricks that can be considered as part of the actual construction materials. Thus, with the production of this light and strong brick, the volume of the coal ash waste that was dumped in the landfill will be substantially reduced and simultaneously the lighter bricks will reduce the dead loads supported by the main structures of the building.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"10 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129112182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Tensile Strength on Various Layer Stack Sequence of Fiber Reinforced Polymer (FRP)","authors":"R. Ramli, A. Alisibramulisi, Suhailah Mohamed Noor, D. D. Suharso","doi":"10.24191/jscet.v1i1.50-60","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.50-60","url":null,"abstract":"This paper presents the analysis of tensile strength on various layer stack sequence of Fiber Reinforced Polymer (FRP). FRP is a composite material which made of hardened or room temperature treated resin as medium. The FRP is composed with particular reinforcement materials in order to evaluate the strength. The specimens or samples were made from different combination of FRP materials which involved resin, tissue mat, chopped strand mat, woven roving, resin, catalyst, and colour pigment. The Tensile Test is carried out based on the Axial Stress Test for the same size specimen in five different combination of materials. This study has identified that the combination of Specimen 3, which combined woven roving, resin and colour pigment as the FRP materials has acquired the highest tensile strength.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening the Development of Safety and Health Guidelines During Post Covid 19 Condition for Construction Site Project","authors":"S. Abdull Rahman, Musmuliadi Kamaruding, Fatin Najwa Mohd Nusa, Syahrun Neizam Mohd Dzulkifli","doi":"10.24191/jscet.v1i1.9-19","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.9-19","url":null,"abstract":"COVID-19 has had a significant impact on the construction industry, and it is critical that the economy recovers quickly after COVID-19. Construction project jobsite safety and health, as well as timely project delivery, must be strictly always adhered to. The aim of this research is to identify the understanding, acceptance, and feasibility of the new safety and health guidelines application, as well as to determine the level of knowledge in the senior management of a construction company about the new performance safety and health guidelines due to the COVID-19 pandemic condition, by examining the new safety and health application guidance for the post-COVID-19 situation in the project jobsite. The questionnaire survey (quantitative approach) was distributed to construction sites in Klang Valley. Stratified random sampling was used to obtain data from Grade 7 contractor companies. A total of 140 questionnaires were distributed, with 50 received and analysed using descriptive and frequency analysis, as well as the Relative Importance Index (RII). As a result, the most significant new safety and health guidelines applications in construction sites are the implementation of health screening procedures, the establishment of a recording logbook, and temperature screening at the entry point using a touchless thermometer. One of the most significant aspects of the new safety and health guidelines application’s acceptance and feasibility is the routine cleaning and disinfection of commonly touched surfaces, site offices, and labour dormitories every two hours, four times a day. Lastly, the top management and superiors are encouraged to have individual discussions with employees about the precautions and considerations for those with health problems returning to work, as well as precautions to make the workplace safe. This study complements and benefits clients, contractors, project managers, and other project participants by providing an understanding of the existing implementation of safety and health guidelines application during post-COVID-19 conditions for construction site projects.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121870318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Wastepaper Sludge Ash (WPSA) on Ultimate Flexural and Non-Destructive Test (NDT) Results of Ultra High Performance Concrete","authors":"Wan Mohd Syahidin Wan Sukri, Sakhiah Abdul Kudus, A. Jamadin, N. Mustaffa, K. Sugiura","doi":"10.24191/jscet.v1i1.29-41","DOIUrl":"https://doi.org/10.24191/jscet.v1i1.29-41","url":null,"abstract":"Nowadays, cement is widely used in the construction industry for the development of this modern era, which causes bad effects on the environment and human health. Besides, waste products such as wastepaper are the other problems facing the environment and land field disposal. In this research, the use of WPSA is not only used as an alternative way to save the environment but also to improve concrete strength in UHPC. WPSA has been added in the range of 5% to 15% of the total weight of cement in UHPC. The prisms with a size of 100 mm x 100 mm x 500 mm with a different percentage of WPSA were tested for flexural tests and non-destructive tests (NDT), which measure ultrasonic pulse velocity and rebound. These tests were carried out to evaluate the flexural strength and mechanical properties of WPSA based on NDT testing. The results show the addition of 5%, 10%, and 15% of WPSA, which are 1.96 N/mm2, 2.26 N/mm2, and 2.11 N/mm2 respectively, in UHPC, which causes the lower flexural strength result. At the same time, the UPV test result shows the concrete is of doubtful quality for all specimens. The average pulse velocity of control UHPC is 2397.38 m/s, which is the highest. This result was also followed by a rebound number that represents low compressive strength as compared to the result of the compressive test. The highest average compressive strength is 38 MPa, which represents the control UHPC. At 5% WPSA addition, the compressive strength started to decrease. The addition of 10% and 15% of WPSA causes a more significant drop in compressive strength.","PeriodicalId":194820,"journal":{"name":"Journal of Sustainable Civil Engineering and Technology","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133160886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}