{"title":"User-centred machinery design for a small scale agricultural-based community using Quality Function Deployment","authors":"Sanidda Tiewtoy, Weerasak Moocharoen, Natha Kuptasthien","doi":"10.1080/19397038.2023.2295854","DOIUrl":"https://doi.org/10.1080/19397038.2023.2295854","url":null,"abstract":"","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"8 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159521","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}
Pub Date : 2023-12-07DOI: 10.1080/19397038.2023.2287478
Muhammad Atif, Faraz Junejo, Imran Amin
{"title":"Development of a framework for sustainability assessment of the machining process through machining parameter optimisation technique","authors":"Muhammad Atif, Faraz Junejo, Imran Amin","doi":"10.1080/19397038.2023.2287478","DOIUrl":"https://doi.org/10.1080/19397038.2023.2287478","url":null,"abstract":"","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"32 2","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138591190","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}
Pub Date : 2023-11-27DOI: 10.1080/19397038.2023.2283545
Oluwatoyin Joseph Gbadeyan, Lindokuhle Sibiya, Ncumisa Mpongwana, L. Linganiso, E. Linganiso, N. Deenadayalu
ABSTRACT Cement production processes contribute to around 5% of carbon emissions globally and increase yearly. To cut 5% of global emissions, alternative materials to substitute cement concentration in building materials must be sourced. This review identified some agricultural waste, such as sugarcane bagasse ash (SBA), palm leaf ash, and rice husk ash, with potential materials for partial substitution or replacement for cement. It also discusses the influence of incorporating agricultural waste on critical properties of building materials such as bricks, interlocks, concrete, and pavements. Adding these agricultural wastes could increase bricks’ strength by 65% and reduce unit weight by 25%. It also improves bio bricks’ compressive strength, water resistance, and bulk density. Optimising agricultural waste-loading-producing building materials is critical to their performance and must be considered for developing brick materials with improved properties. The review established that 50% of cement concentration could be replaced with SCBA, or hybridising rice husk ash, agricultural olive waste (AOW), sugarcane leaf waste ashes (SLWA), and rice husk (RH). This suggested that 100% of cement is achievable by exploring hybridising SCBA, a combination of rice husk, (AOW), (SLWA), and (RH) to develop a sustainable material without compromising the required properties for construction application. Incorporating agricultural waste is a viable way to develop more cost-effective and sustainable building materials with no cement content, resulting in a 5% global emission cut and a low-carbon environment.
{"title":"Manufacturing of building materials using agricultural waste (sugarcane bagasse ash) for sustainable construction: towards a low carbon economy. A review","authors":"Oluwatoyin Joseph Gbadeyan, Lindokuhle Sibiya, Ncumisa Mpongwana, L. Linganiso, E. Linganiso, N. Deenadayalu","doi":"10.1080/19397038.2023.2283545","DOIUrl":"https://doi.org/10.1080/19397038.2023.2283545","url":null,"abstract":"ABSTRACT Cement production processes contribute to around 5% of carbon emissions globally and increase yearly. To cut 5% of global emissions, alternative materials to substitute cement concentration in building materials must be sourced. This review identified some agricultural waste, such as sugarcane bagasse ash (SBA), palm leaf ash, and rice husk ash, with potential materials for partial substitution or replacement for cement. It also discusses the influence of incorporating agricultural waste on critical properties of building materials such as bricks, interlocks, concrete, and pavements. Adding these agricultural wastes could increase bricks’ strength by 65% and reduce unit weight by 25%. It also improves bio bricks’ compressive strength, water resistance, and bulk density. Optimising agricultural waste-loading-producing building materials is critical to their performance and must be considered for developing brick materials with improved properties. The review established that 50% of cement concentration could be replaced with SCBA, or hybridising rice husk ash, agricultural olive waste (AOW), sugarcane leaf waste ashes (SLWA), and rice husk (RH). This suggested that 100% of cement is achievable by exploring hybridising SCBA, a combination of rice husk, (AOW), (SLWA), and (RH) to develop a sustainable material without compromising the required properties for construction application. Incorporating agricultural waste is a viable way to develop more cost-effective and sustainable building materials with no cement content, resulting in a 5% global emission cut and a low-carbon environment.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"131 1","pages":"368 - 382"},"PeriodicalIF":3.7,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139230801","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}
Pub Date : 2023-11-27DOI: 10.1080/19397038.2023.2281934
Abraham Yeboah, Vida Owusu-Prempeh, Ofosu Agyekum, Ebenezer Kwame Addae, Nana Owusu-Frimpong
ABSTRACT The consumer attitudes towards how they participate in the disposal of solid waste products is a crucial concern in Ghana. The attribution theory in social psychology emerged in the literature as a paradigm that seeks to explain the consumer attitudes towards solid waste products disposables that are negative and individualistic. This study estimates the motivational factors to consumer attitudes and unlawful disposal of solid waste products in Bono Region of Ghana. The results indicated the direct path dimensions of the analysed hostile aggression was CoE (−0.103), SE (0.040), CR (−2.547), p (0.011), learned helplessness was CoE (0.112), SE (0.052), CR (−2.133), p (0.033), and beliefs was CoE (0.049), SE (0.049), CR (0.988), p (0.323). Beliefs were not significant. However, hostile aggression and learned helplessness were significantly related to the unlawful disposal of solid waste products. The mediation for advertising message type was EST (0.622), SE (0.038), p (0.000) significant indirect effect towards the unlawful disposal of solid waste products and moderation interaction for existential consumer EST (0.002), SE (0.000), CR (70.939), p (0.000) was significant towards the unlawful disposal of solid waste products. The results suggest that many consumers who throw away solid waste products participate in unlawful disposal practices.
{"title":"Consumer attitudes: drivers of unlawful disposal of solid waste products","authors":"Abraham Yeboah, Vida Owusu-Prempeh, Ofosu Agyekum, Ebenezer Kwame Addae, Nana Owusu-Frimpong","doi":"10.1080/19397038.2023.2281934","DOIUrl":"https://doi.org/10.1080/19397038.2023.2281934","url":null,"abstract":"ABSTRACT The consumer attitudes towards how they participate in the disposal of solid waste products is a crucial concern in Ghana. The attribution theory in social psychology emerged in the literature as a paradigm that seeks to explain the consumer attitudes towards solid waste products disposables that are negative and individualistic. This study estimates the motivational factors to consumer attitudes and unlawful disposal of solid waste products in Bono Region of Ghana. The results indicated the direct path dimensions of the analysed hostile aggression was CoE (−0.103), SE (0.040), CR (−2.547), p (0.011), learned helplessness was CoE (0.112), SE (0.052), CR (−2.133), p (0.033), and beliefs was CoE (0.049), SE (0.049), CR (0.988), p (0.323). Beliefs were not significant. However, hostile aggression and learned helplessness were significantly related to the unlawful disposal of solid waste products. The mediation for advertising message type was EST (0.622), SE (0.038), p (0.000) significant indirect effect towards the unlawful disposal of solid waste products and moderation interaction for existential consumer EST (0.002), SE (0.000), CR (70.939), p (0.000) was significant towards the unlawful disposal of solid waste products. The results suggest that many consumers who throw away solid waste products participate in unlawful disposal practices.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"6 1","pages":"349 - 367"},"PeriodicalIF":3.7,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139232120","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}
Pub Date : 2023-11-18DOI: 10.1080/19397038.2023.2276936
S. K. Dewi, Rini Febrianti, D. M. Utama
ABSTRACT This study presents a novel approach for evaluating the performance of sustainable manufacturing by integrating the Triple Bottom Line (TBL) concept. The research incorporates various novel metrics, including machine performance, physical load, and mental load. Additionally, the evaluation of sustainable manufacturing takes into account the workload assigned to each workstation in the production process. This research utilizes the Delphi approach, Analytical Hierarchy Process (AHP), Sustainable Value Stream Mapping (SVSM), and Traffic Light System (TLS). The Delphi method is employed to assess pertinent indicators. Meanwhile, the Analytic Hierarchy Process (AHP) is utilized to evaluate the importance of the TBL and workstation indicators. The SVSM and TLS techniques were employed to chart the TBL indicators. The Manufacturing Sustainability Index (MSI) scores were computed using indicators, workstation weights, and indicator efficiency. Additionally, a case study is provided on the tire sector in Indonesia. The tire industry's MSI findings showed a performance score of 85.52%, signifying the need for improvement in performance. The findings of this study have research implications as they contribute to the advancement of theory in evaluating sustainable manufacturing performance. Furthermore, this study offers managerial recommendations for the tire business to enhance sustainable production performance.
{"title":"An Integrated method for manufacturing Sustainability assessment in tire industry: a case study in Indonesian","authors":"S. K. Dewi, Rini Febrianti, D. M. Utama","doi":"10.1080/19397038.2023.2276936","DOIUrl":"https://doi.org/10.1080/19397038.2023.2276936","url":null,"abstract":"ABSTRACT This study presents a novel approach for evaluating the performance of sustainable manufacturing by integrating the Triple Bottom Line (TBL) concept. The research incorporates various novel metrics, including machine performance, physical load, and mental load. Additionally, the evaluation of sustainable manufacturing takes into account the workload assigned to each workstation in the production process. This research utilizes the Delphi approach, Analytical Hierarchy Process (AHP), Sustainable Value Stream Mapping (SVSM), and Traffic Light System (TLS). The Delphi method is employed to assess pertinent indicators. Meanwhile, the Analytic Hierarchy Process (AHP) is utilized to evaluate the importance of the TBL and workstation indicators. The SVSM and TLS techniques were employed to chart the TBL indicators. The Manufacturing Sustainability Index (MSI) scores were computed using indicators, workstation weights, and indicator efficiency. Additionally, a case study is provided on the tire sector in Indonesia. The tire industry's MSI findings showed a performance score of 85.52%, signifying the need for improvement in performance. The findings of this study have research implications as they contribute to the advancement of theory in evaluating sustainable manufacturing performance. Furthermore, this study offers managerial recommendations for the tire business to enhance sustainable production performance.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"76 3","pages":"1 - 12"},"PeriodicalIF":3.7,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139261628","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}
Pub Date : 2023-11-15DOI: 10.1080/19397038.2023.2268639
Brían Ó Longaigh, John Noonan, Anna Trubetskaya, Olivia McDermott
ABSTRACT This study aims to develop and implement a Strategic Facility Planning process at a highly regulated manufacturing site to optimise manufacturing space and capacity in a facility running out of space. The project demonstrates the application of Design for Lean Six Sigma and a structured Define, Measure, Analyse, Design, and Verify methodology in designing and implementing a process that enables the case study manufacturing site to improve its space utilisation and free up space. The project resulted in increased space usage of approx. 38000 sq. ft. equating to a hard cost saving of over $13 million for the organisation and a cost avoidance of $22 million. The study’s contribution is that it highlights for the first time that the Design for Lean Six Sigma methodology can be utilised for space and facility utilisation and can be leveraged by other manufacturers. This study has academic and managerial implications for identifying best practices for Design for Lean Six Sigma methodology application in Strategic facility planning. This study contributes to the few academic published works to utilise Design for Lean Six Sigma methodology for space utilisation in a highly regulated environment. This study will contribute to managerial practice in aiding other manufacturing organisations with recommendations on utilising Design for Lean Six Sigma and design for improved space utilisation to reduce costs.
{"title":"Strategic facility & space planning utilising Design for Lean Six Sigma","authors":"Brían Ó Longaigh, John Noonan, Anna Trubetskaya, Olivia McDermott","doi":"10.1080/19397038.2023.2268639","DOIUrl":"https://doi.org/10.1080/19397038.2023.2268639","url":null,"abstract":"ABSTRACT This study aims to develop and implement a Strategic Facility Planning process at a highly regulated manufacturing site to optimise manufacturing space and capacity in a facility running out of space. The project demonstrates the application of Design for Lean Six Sigma and a structured Define, Measure, Analyse, Design, and Verify methodology in designing and implementing a process that enables the case study manufacturing site to improve its space utilisation and free up space. The project resulted in increased space usage of approx. 38000 sq. ft. equating to a hard cost saving of over $13 million for the organisation and a cost avoidance of $22 million. The study’s contribution is that it highlights for the first time that the Design for Lean Six Sigma methodology can be utilised for space and facility utilisation and can be leveraged by other manufacturers. This study has academic and managerial implications for identifying best practices for Design for Lean Six Sigma methodology application in Strategic facility planning. This study contributes to the few academic published works to utilise Design for Lean Six Sigma methodology for space utilisation in a highly regulated environment. This study will contribute to managerial practice in aiding other manufacturing organisations with recommendations on utilising Design for Lean Six Sigma and design for improved space utilisation to reduce costs.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"EM-33 4","pages":"1 - 13"},"PeriodicalIF":3.7,"publicationDate":"2023-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139275349","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}
Pub Date : 2023-10-18DOI: 10.1080/19397038.2023.2269204
Adeola M. Dahunsi, Bennet Atsu Kwame Foli
This study investigated the historical and future wave power potential in the Gulf of Guinea (GoG) with the aim of identifying high-density wave energy locations for potential exploitation. To estimate wave power density (WPD) for three time periods (past: 1979–2005, mid-century: 2026–2050, and end-century: 2081–2100), we utilized significant wave height and mean wave period obtained from eight General Circulation Models. Using an ensemble of these WAVEWATCH III simulated datasets, we calculated WPD and assessed overall and seasonal trends, projecting changes under Representative Concentration Pathway (RCP) 4.5 and 8.5 scenarios. Results revealed higher potential WPD in the western GoG, particularly near the coast, with increased values offshore. Spatially, WPD change rates varied widely (−0.021 to 0.039 kW/m per year), suggesting both positive and negative trends, though generally low. Projections indicated a potential increase from 0.5 to 1.0 kW/m by the end of the century. The estimated potential power for harvesting exceeded 14,000 MW, with offshore regions showing better wave converter performance. This study concludes that GoG's wave energy is a promising renewable resource, offering a potential solution to future power needs and contributing to regional greenhouse gas emission mitigation.
{"title":"Assessment of past and future potential of ocean wave power in the Gulf of Guinea","authors":"Adeola M. Dahunsi, Bennet Atsu Kwame Foli","doi":"10.1080/19397038.2023.2269204","DOIUrl":"https://doi.org/10.1080/19397038.2023.2269204","url":null,"abstract":"This study investigated the historical and future wave power potential in the Gulf of Guinea (GoG) with the aim of identifying high-density wave energy locations for potential exploitation. To estimate wave power density (WPD) for three time periods (past: 1979–2005, mid-century: 2026–2050, and end-century: 2081–2100), we utilized significant wave height and mean wave period obtained from eight General Circulation Models. Using an ensemble of these WAVEWATCH III simulated datasets, we calculated WPD and assessed overall and seasonal trends, projecting changes under Representative Concentration Pathway (RCP) 4.5 and 8.5 scenarios. Results revealed higher potential WPD in the western GoG, particularly near the coast, with increased values offshore. Spatially, WPD change rates varied widely (−0.021 to 0.039 kW/m per year), suggesting both positive and negative trends, though generally low. Projections indicated a potential increase from 0.5 to 1.0 kW/m by the end of the century. The estimated potential power for harvesting exceeded 14,000 MW, with offshore regions showing better wave converter performance. This study concludes that GoG's wave energy is a promising renewable resource, offering a potential solution to future power needs and contributing to regional greenhouse gas emission mitigation.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883567","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}
Pub Date : 2023-10-12DOI: 10.1080/19397038.2023.2205872
Kannadhasan Suriyan, Vennila C, Sentamilselvi M, Priyabrata Adhikary, Karpoora Sundari K, Madhu M. C, Madhusudhana CS, Badari Narayana K
A novel electrical setup for a domestic house is suggested that uses both an AC bus bar fuelled by conventional electrical utilities and a DC bus bar powered by roof-mounted solar panels. Residential rooftop solar panels (RTSP) have become more and more common in recent years. Despite the fact that RTSP produce DC power, the power electronics device is set up to convert DC to AC in order to supply power to the house. As replacements for conventional AC appliances, DC appliances and Brushless DC (BLDC) motor-based devices are now readily accessible. A normal two-bedroom condominium was used for the research, and the AC bus arrangement was changed to include DC bus power from rooftop solar cells and AC bus bar power from the state power system. As before, the AC bus will continue to power high power appliances like geysers and pump engines while the DC bus will continue to power the DC appliances. A combination DC-AC house with rooftop solar electricity has been studied for feasibility using simulation studies using Matlab and Simulink. The early findings made public are encouraging for a novel combination DC-AC house setup.
{"title":"A novel reconfigurable hybrid DC-AC home technique with renewable energy resources and converters","authors":"Kannadhasan Suriyan, Vennila C, Sentamilselvi M, Priyabrata Adhikary, Karpoora Sundari K, Madhu M. C, Madhusudhana CS, Badari Narayana K","doi":"10.1080/19397038.2023.2205872","DOIUrl":"https://doi.org/10.1080/19397038.2023.2205872","url":null,"abstract":"A novel electrical setup for a domestic house is suggested that uses both an AC bus bar fuelled by conventional electrical utilities and a DC bus bar powered by roof-mounted solar panels. Residential rooftop solar panels (RTSP) have become more and more common in recent years. Despite the fact that RTSP produce DC power, the power electronics device is set up to convert DC to AC in order to supply power to the house. As replacements for conventional AC appliances, DC appliances and Brushless DC (BLDC) motor-based devices are now readily accessible. A normal two-bedroom condominium was used for the research, and the AC bus arrangement was changed to include DC bus power from rooftop solar cells and AC bus bar power from the state power system. As before, the AC bus will continue to power high power appliances like geysers and pump engines while the DC bus will continue to power the DC appliances. A combination DC-AC house with rooftop solar electricity has been studied for feasibility using simulation studies using Matlab and Simulink. The early findings made public are encouraging for a novel combination DC-AC house setup.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136012828","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}
Pub Date : 2023-09-18DOI: 10.1080/19397038.2023.2256382
Paula Llanquileo-Melgarejo, María Molinos-Senante
Enhancing the economic and environmental efficiency of municipal solid waste (MSW) management is crucial for transitioning to a circular economy and achieving cost-efficient and sustainable waste practices. In this study, we introduce an innovative approach to examine the influence of MSW recycling on waste performance over multiple years. We employ a non-parametric method to assess and compare the Malmquist Productivity Index (MPI) and the Malmquist-Luenberger Productivity Index (MLPI) across 143 municipalities in Chile from 2015 to 2019. The findings reveal a positive trend in both MPI and MLPI. The average eco-productivity change (MLPI) is relatively lower than the average productivity change (MPI) throughout the evaluated years. The aggregated scores for MPI and MLPI between 2015 and 2019 stand at 2.73 and 1.33, respectively. The primary driver of productivity change is attributed to technical advancements, leading to a shift in the efficient frontier, while eco-productivity change predominantly arises from efficiency enhancements. This implies that municipalities have employed diverse strategies to enhance their economic and environmental performance. The results and implications of this study hold significance for policymakers at regional and local levels, offering valuable insights for optimising MSW management within the context of a circular economy.
{"title":"The impact of recycling on the productivity of Municipal Solid Waste: a comparison of the Malmquist and Malmquist-Luenberger Productivity Indexes","authors":"Paula Llanquileo-Melgarejo, María Molinos-Senante","doi":"10.1080/19397038.2023.2256382","DOIUrl":"https://doi.org/10.1080/19397038.2023.2256382","url":null,"abstract":"Enhancing the economic and environmental efficiency of municipal solid waste (MSW) management is crucial for transitioning to a circular economy and achieving cost-efficient and sustainable waste practices. In this study, we introduce an innovative approach to examine the influence of MSW recycling on waste performance over multiple years. We employ a non-parametric method to assess and compare the Malmquist Productivity Index (MPI) and the Malmquist-Luenberger Productivity Index (MLPI) across 143 municipalities in Chile from 2015 to 2019. The findings reveal a positive trend in both MPI and MLPI. The average eco-productivity change (MLPI) is relatively lower than the average productivity change (MPI) throughout the evaluated years. The aggregated scores for MPI and MLPI between 2015 and 2019 stand at 2.73 and 1.33, respectively. The primary driver of productivity change is attributed to technical advancements, leading to a shift in the efficient frontier, while eco-productivity change predominantly arises from efficiency enhancements. This implies that municipalities have employed diverse strategies to enhance their economic and environmental performance. The results and implications of this study hold significance for policymakers at regional and local levels, offering valuable insights for optimising MSW management within the context of a circular economy.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203396","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}
Pub Date : 2023-09-18DOI: 10.1080/19397038.2023.2257735
S.M.D.V. Suraweera, Sudhira De Silva
Concrete is poorly tensile in strength and susceptible to cracking. Therefore, researchers have explored the incorporation of PET fibres into concrete as reinforcement. PET is a polymer commonly used in food and beverage packaging, and textile industry. This study reviews the fresh and hardened properties of recycled PET fibre-reinforced concrete (rPET-FRC). The workability, compressive, tensile, and flexural strength are investigated under factors such as rPET fibre volume, dimensions, water–cement ratio, and the use of blended cement. This review includes experimental results of previously conducted rPET-FRC research along with results gained from rPET-FRC where the rPET fibres are obtained from the same recycling plant. Furthermore, the experimental results are broadly elaborated by explaining the reasons behind the obtained results. This review is a valuable reference that offers insights into the effectiveness of rPET fibres in enhancing concrete’s overall mechanical properties. By highlighting the most effective rPET fibre volume fractions, water-cement ratios, and the influence of blended cement, this review enables researchers to optimise the design and application of rPET-FRC, promoting sustainable and innovative solutions in the global infrastructure sector. Further studies to be carried out in the future are recommended and existing research gaps related to rPET-FRC are also highlighted.
{"title":"Effect of Recycled Polyethylene Terephthalate (PET) fibres on fresh and hardened properties of concrete: a review","authors":"S.M.D.V. Suraweera, Sudhira De Silva","doi":"10.1080/19397038.2023.2257735","DOIUrl":"https://doi.org/10.1080/19397038.2023.2257735","url":null,"abstract":"Concrete is poorly tensile in strength and susceptible to cracking. Therefore, researchers have explored the incorporation of PET fibres into concrete as reinforcement. PET is a polymer commonly used in food and beverage packaging, and textile industry. This study reviews the fresh and hardened properties of recycled PET fibre-reinforced concrete (rPET-FRC). The workability, compressive, tensile, and flexural strength are investigated under factors such as rPET fibre volume, dimensions, water–cement ratio, and the use of blended cement. This review includes experimental results of previously conducted rPET-FRC research along with results gained from rPET-FRC where the rPET fibres are obtained from the same recycling plant. Furthermore, the experimental results are broadly elaborated by explaining the reasons behind the obtained results. This review is a valuable reference that offers insights into the effectiveness of rPET fibres in enhancing concrete’s overall mechanical properties. By highlighting the most effective rPET fibre volume fractions, water-cement ratios, and the influence of blended cement, this review enables researchers to optimise the design and application of rPET-FRC, promoting sustainable and innovative solutions in the global infrastructure sector. Further studies to be carried out in the future are recommended and existing research gaps related to rPET-FRC are also highlighted.","PeriodicalId":14400,"journal":{"name":"International Journal of Sustainable Engineering","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203394","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}
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