Modern technologies are more than ever adopting intelligent designs that respond to environmental variants to produce more desirable outcomes. In the building and housing industries, intelligent designs aim to conserve energy through temperature controls and energy storage and distribution systems. In this context, an intelligent Aerogel insulation system is modelled and studied for the exterior building walls. Aerogel with a thermal conductivity of about 0.012 W/m-K has a superior insulating property, and an intelligent design built around it would introduce additional energy storage and delivery enhancements to the system. In this study, a test room and a control room in an open urban environment were built, and the intended intelligence, first considered by choosing Aerogel that has the potential to be engineered with smart properties according to researchers in composite material science, and second was considered by automation which was applied manually to the test room. The calculated thermal conductivity of an external wall with intelligent Aerogel insulation is -(1.83 ± 0.06) × 10−1 W/m. The negative sign is an attribute of a system function rather than of a material. The external wall with intelligent Aerogel insulation, in comparison to an identical non-insulated wall, exhibited 2.7 times better energy conservation.
{"title":"Thermal conductivity of an external wall with simulated smart Aerogel insulation system","authors":"Kaveh Iravani","doi":"10.1680/jensu.23.00064","DOIUrl":"https://doi.org/10.1680/jensu.23.00064","url":null,"abstract":"Modern technologies are more than ever adopting intelligent designs that respond to environmental variants to produce more desirable outcomes. In the building and housing industries, intelligent designs aim to conserve energy through temperature controls and energy storage and distribution systems. In this context, an intelligent Aerogel insulation system is modelled and studied for the exterior building walls. Aerogel with a thermal conductivity of about 0.012 W/m-K has a superior insulating property, and an intelligent design built around it would introduce additional energy storage and delivery enhancements to the system. In this study, a test room and a control room in an open urban environment were built, and the intended intelligence, first considered by choosing Aerogel that has the potential to be engineered with smart properties according to researchers in composite material science, and second was considered by automation which was applied manually to the test room. The calculated thermal conductivity of an external wall with intelligent Aerogel insulation is -(1.83 ± 0.06) × 10<sup>−1</sup> W/m. The negative sign is an attribute of a system function rather than of a material. The external wall with intelligent Aerogel insulation, in comparison to an identical non-insulated wall, exhibited 2.7 times better energy conservation.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140801837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dora L de Melo, Jason T DeJong, Alissa Kendall, Barry M Lehane
This study conducts a life cycle assessment to evaluate the environmental impacts of driven shafts across twelve different siliceous sand sites, selected from a database of static load pile tests. Through parametric studies, this paper investigates the influence of soil properties, pile geometry, and on-site activities on environmental impacts. For a single pile, findings demonstrate that material production is the most impactful phase, contributing 88.4% of global warming potential (GWP) per unit capacity, while on-site operations contribute minimally at 1%. Sensitivity analyses show that variations in fuel consumption by ± 25% and linear interpolations of blow counts result in negligible difference in GWP (less than 0.1% and 1%, respectively). On average, the total GWP for steel and concrete piles is approximately 4.3 and 0.92 kg CO2e per kN capacity, respectively. Although various factors influence pile design and installation, the results presented herein provide a foundational framework for geotechnical engineers to integrate environmental impacts into project planning, design, and construction considerations.
{"title":"Life cycle based considerations in design of driven piles in sand","authors":"Dora L de Melo, Jason T DeJong, Alissa Kendall, Barry M Lehane","doi":"10.1680/jensu.23.00099","DOIUrl":"https://doi.org/10.1680/jensu.23.00099","url":null,"abstract":"This study conducts a life cycle assessment to evaluate the environmental impacts of driven shafts across twelve different siliceous sand sites, selected from a database of static load pile tests. Through parametric studies, this paper investigates the influence of soil properties, pile geometry, and on-site activities on environmental impacts. For a single pile, findings demonstrate that material production is the most impactful phase, contributing 88.4% of global warming potential (GWP) per unit capacity, while on-site operations contribute minimally at 1%. Sensitivity analyses show that variations in fuel consumption by ± 25% and linear interpolations of blow counts result in negligible difference in GWP (less than 0.1% and 1%, respectively). On average, the total GWP for steel and concrete piles is approximately 4.3 and 0.92 kg CO<sub>2</sub>e per kN capacity, respectively. Although various factors influence pile design and installation, the results presented herein provide a foundational framework for geotechnical engineers to integrate environmental impacts into project planning, design, and construction considerations.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140629988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aims to develop a Preference Ranking Model (PRM) using the Analytic Hierarchy Process (AHP) for expanding tap water utilities. The literature review identifies six aspects and fifteen factors influencing the prioritization and decisions regarding the extension of tap water pipelines. A pilot study involving eight officials yielded a Consistency Index (CI) of 0.070, which is below the threshold of 0.1, supporting the feasibility of the AHP questionnaire. The formal AHP questionnaire, targeting 30 officials with over six years of work experience, resulted in a CI of 0.062 and a CR of 0.050, both meeting the criteria of being less than 0.1. The established priority ranking places emphasis on: (1) Aspects - water source > construction period > population > residential type > political matter > constructability; and (2) factor preference rankings within each aspect. The outcome undergoes evaluation based on 26 empirical cases to determine its potential approval by the central government. Apart from the costly construction in the top three cases, the acceptance rate sees an approximately 60% increase compared to previous rates. These findings promise to enhance operational efficiency, saving both time and manpower in practical applications.
{"title":"Establishing preference ranking for town water supply in remote areas: case study in Taiwan","authors":"Jieh-Haur Chen, Andina Mugi Utami, Jui-Pin Wang, Chien-Ming Huang, Lian Shen","doi":"10.1680/jensu.23.00033","DOIUrl":"https://doi.org/10.1680/jensu.23.00033","url":null,"abstract":"This study aims to develop a Preference Ranking Model (PRM) using the Analytic Hierarchy Process (AHP) for expanding tap water utilities. The literature review identifies six aspects and fifteen factors influencing the prioritization and decisions regarding the extension of tap water pipelines. A pilot study involving eight officials yielded a Consistency Index (CI) of 0.070, which is below the threshold of 0.1, supporting the feasibility of the AHP questionnaire. The formal AHP questionnaire, targeting 30 officials with over six years of work experience, resulted in a CI of 0.062 and a CR of 0.050, both meeting the criteria of being less than 0.1. The established priority ranking places emphasis on: (1) Aspects - water source > construction period > population > residential type > political matter > constructability; and (2) factor preference rankings within each aspect. The outcome undergoes evaluation based on 26 empirical cases to determine its potential approval by the central government. Apart from the costly construction in the top three cases, the acceptance rate sees an approximately 60% increase compared to previous rates. These findings promise to enhance operational efficiency, saving both time and manpower in practical applications.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Prefabricated and assembled retaining wall systems are gradually becoming the choice for slope stabilisation and earth-retaining structures. However, current prefabricated retaining wall systems are often difficult to apply in complex and variable construction sites due to issues such as inconsistent production dimensions and transportation difficulties. This paper presents a novel prefabricated retaining wall system and reports centrifuge model tests performed to analyse its overall performance. The influence of different infill materials on the performance of the prefabricated retaining wall system was studied. The research findings reveal that the retaining wall system provides significant slope stabilisation effects and can withstand up to four times the stress level of a natural slope. Moreover, the stability of the retaining wall system is more than twice better when infilled with frictional soil compared with that when clay infill is used. Due to its unique structure, it can not only reduce material consumption and carbon dioxide emissions by around 63.94% but also allow planting of green plants in the gaps of components, thereby providing a more sustainable alternative to conventional concrete gravity wall systems.
{"title":"Performance evaluation of prefabricated retaining wall systems based on centrifuge tests","authors":"Honglue Qu, Wangwang Dong, Zhaolong Li, Gopal Santana Phani Madabhushi","doi":"10.1680/jensu.23.00072","DOIUrl":"https://doi.org/10.1680/jensu.23.00072","url":null,"abstract":"Prefabricated and assembled retaining wall systems are gradually becoming the choice for slope stabilisation and earth-retaining structures. However, current prefabricated retaining wall systems are often difficult to apply in complex and variable construction sites due to issues such as inconsistent production dimensions and transportation difficulties. This paper presents a novel prefabricated retaining wall system and reports centrifuge model tests performed to analyse its overall performance. The influence of different infill materials on the performance of the prefabricated retaining wall system was studied. The research findings reveal that the retaining wall system provides significant slope stabilisation effects and can withstand up to four times the stress level of a natural slope. Moreover, the stability of the retaining wall system is more than twice better when infilled with frictional soil compared with that when clay infill is used. Due to its unique structure, it can not only reduce material consumption and carbon dioxide emissions by around 63.94% but also allow planting of green plants in the gaps of components, thereby providing a more sustainable alternative to conventional concrete gravity wall systems.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140199890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In many cities, protracted exposure of urban structures to excessive solar radiation and the urban heat island (UHI) phenomenon may cause thermal discomfort for pedestrians in outdoor spaces, particularly in hot-arid regions. This study investigated the impact of urban residential block morphology on microclimate in Isfahan, Iran, using ENVI-met numerical models. The predicted mean vote (PMV) model for residential outdoor spaces was calculated using simulation data for the hottest day of the summer to assess outdoor thermal comfort. Comparison of the alternatives – namely, diagonal blocks, compact linear blocks, continuous curved blocks and dispersed cubic blocks – showed that the microclimate performance of the diagonal type was better than those of the other design options, as the PMV index represented the minimum distance from the ideal thermal comfort range due to a lower sky view factor (SVF) and optimal orientation. The curved blocks performed better in urban open spaces, promoting airflow and reducing UHI, than linear and cubic blocks. The results showed that the PMV index could predict thermal comfort in various urban design patterns and could be affected by the morphology of urban blocks. Variations in building morphology alter the SVF and microclimate parameters, which have an impact on outdoor thermal comfort.
{"title":"Urban microclimate analysis: residential block morphology impact on outdoor thermal comfort","authors":"Golbarg Sadeghian, Mansoureh Tahbaz, Pantea Hakimian","doi":"10.1680/jensu.22.00042","DOIUrl":"https://doi.org/10.1680/jensu.22.00042","url":null,"abstract":"In many cities, protracted exposure of urban structures to excessive solar radiation and the urban heat island (UHI) phenomenon may cause thermal discomfort for pedestrians in outdoor spaces, particularly in hot-arid regions. This study investigated the impact of urban residential block morphology on microclimate in Isfahan, Iran, using ENVI-met numerical models. The predicted mean vote (PMV) model for residential outdoor spaces was calculated using simulation data for the hottest day of the summer to assess outdoor thermal comfort. Comparison of the alternatives – namely, diagonal blocks, compact linear blocks, continuous curved blocks and dispersed cubic blocks – showed that the microclimate performance of the diagonal type was better than those of the other design options, as the PMV index represented the minimum distance from the ideal thermal comfort range due to a lower sky view factor (SVF) and optimal orientation. The curved blocks performed better in urban open spaces, promoting airflow and reducing UHI, than linear and cubic blocks. The results showed that the PMV index could predict thermal comfort in various urban design patterns and could be affected by the morphology of urban blocks. Variations in building morphology alter the SVF and microclimate parameters, which have an impact on outdoor thermal comfort.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Floating solar photovoltaic (FSPV) systems offer a more sustainable energy option than ground-mounted ones by avoiding land use and enabling decentralised power generation. This paper presents a conceptual hybrid design for an actual hydropower plant and a simulated FSPV plant, considering relevant factors. Five significant reservoir dams in India were chosen to test the proposed design, and as a novelty, the cooling effect was considered. In general, the cooling impact is dependent on the kind of supporting structure. Metrics such as generation, carbon dioxide (CO2) reductions, water savings and extra hydropower were computed in this work by considering two kinds of floating structures. The results indicate that with a total coverage of less than 20%, the hydroelectric reservoirs can double their installed power capacity. In terms of energy gain, the hydroelectric plant generated 92% more energy on average after integrating floating solar power. Furthermore, the capacity factor of the plant grew by an average of 18.43%. The total water savings in this scenario are 134.6 million m3, resulting in an additional 34.97 GWh of annual hydroelectricity generation. The cost–benefit analysis shows that the energy produced by FSPV is the most cost effective, ranging from 2.65 to 3.05 Indian rupees/kWh (US$0.03–0.04/kWh), depending on the FSPV platform.
{"title":"Analysis of floating photovoltaic systems on hydro reservoirs","authors":"G Mamatha, P S Kulkarni","doi":"10.1680/jensu.23.00047","DOIUrl":"https://doi.org/10.1680/jensu.23.00047","url":null,"abstract":"Floating solar photovoltaic (FSPV) systems offer a more sustainable energy option than ground-mounted ones by avoiding land use and enabling decentralised power generation. This paper presents a conceptual hybrid design for an actual hydropower plant and a simulated FSPV plant, considering relevant factors. Five significant reservoir dams in India were chosen to test the proposed design, and as a novelty, the cooling effect was considered. In general, the cooling impact is dependent on the kind of supporting structure. Metrics such as generation, carbon dioxide (CO<sub>2</sub>) reductions, water savings and extra hydropower were computed in this work by considering two kinds of floating structures. The results indicate that with a total coverage of less than 20%, the hydroelectric reservoirs can double their installed power capacity. In terms of energy gain, the hydroelectric plant generated 92% more energy on average after integrating floating solar power. Furthermore, the capacity factor of the plant grew by an average of 18.43%. The total water savings in this scenario are 134.6 million m<sup>3</sup>, resulting in an additional 34.97 GWh of annual hydroelectricity generation. The cost–benefit analysis shows that the energy produced by FSPV is the most cost effective, ranging from 2.65 to 3.05 Indian rupees/kWh (US$0.03–0.04/kWh), depending on the FSPV platform.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140199907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sophie Ball, Colin A Booth, Abdul-Majeed Mahamadu, Jacqueline Glass
The last decade has witnessed an urgency to adopt integrated and sustainable practices within construction manufacturing processes. With this in mind, this study examines individuals’ experiences of the sector’s uptake of BES 6001 to determine themes and propose methods for improving the process driving towards a sustainable future. Using a phenomenological methodology and a strategy for purposive sampling of architecture, engineering and construction industry professionals involved in the certification of products under the BES 6001 framework, semi-structured interviews (n = 6) were used to collect ‘lived-experience’ data. The key benefits of implementation include (a) management belief; (b) BES 6001 providing automated, transparent and accountable reporting; and (c) BES 6001 providing assurance to stakeholders. Meanwhile, the key barriers include (a) the complexity and cost of administration of the assessment; (b) access for small and medium-sized enterprises/small supply chain members being challenging; and (c) the perception of value. Based on the findings, the following recommendations are proposed: (a) there should be consultation and assessment of planned future revisions of the BES 6001 standard; (b) there should be analysis of evidence production for BES 6001 accreditation, with a view to provide in-depth support to organisations – such as a guidance manual or similar; and (c) a clear and integrated approach to responsible sourcing should be explored, considering multiple third-party accreditations.
{"title":"Implementing responsible sourcing in the architecture, engineering and construction sector","authors":"Sophie Ball, Colin A Booth, Abdul-Majeed Mahamadu, Jacqueline Glass","doi":"10.1680/jensu.23.00042","DOIUrl":"https://doi.org/10.1680/jensu.23.00042","url":null,"abstract":"The last decade has witnessed an urgency to adopt integrated and sustainable practices within construction manufacturing processes. With this in mind, this study examines individuals’ experiences of the sector’s uptake of BES 6001 to determine themes and propose methods for improving the process driving towards a sustainable future. Using a phenomenological methodology and a strategy for purposive sampling of architecture, engineering and construction industry professionals involved in the certification of products under the BES 6001 framework, semi-structured interviews (<i>n</i> = 6) were used to collect ‘lived-experience’ data. The key benefits of implementation include (<i>a</i>) management belief; (<i>b</i>) BES 6001 providing automated, transparent and accountable reporting; and (<i>c</i>) BES 6001 providing assurance to stakeholders. Meanwhile, the key barriers include (<i>a</i>) the complexity and cost of administration of the assessment; (<i>b</i>) access for small and medium-sized enterprises/small supply chain members being challenging; and (<i>c</i>) the perception of value. Based on the findings, the following recommendations are proposed: (<i>a</i>) there should be consultation and assessment of planned future revisions of the BES 6001 standard; (<i>b</i>) there should be analysis of evidence production for BES 6001 accreditation, with a view to provide in-depth support to organisations – such as a guidance manual or similar; and (<i>c</i>) a clear and integrated approach to responsible sourcing should be explored, considering multiple third-party accreditations.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138740960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abderrahmane Ghrieb, Yacine Abadou, Rosa Bustamante, María Isabel Sánchez de Rojas
The use of construction waste in creating concrete and mortar is an important process that not only offers economic benefits but also helps protect the environment by reducing waste in rural and urban areas. This experimental study aims to investigate the effect of adding crushed ceramic waste (CCW) and crushed brick waste (CBW) on the bulk density, workability, compressive and flexural strengths, water absorption and microstructural properties of dune sand mortar. To determine changes in porosity, the study uses the mercury intrusion porosimetry technique to measure porosity and pore size distribution. Scanning electron microscopy and energy-dispersive X-ray spectroscopy analyses are conducted to examine the microstructure and size of the voids using an electron microscope, and photographs of voids in the mortar matrix are taken. By replacing 15% of the sand with CCW and CBW, the compactness and mechanical strength of the dune sand mortar are enhanced, increasing the dynamic modulus of elasticity by around 29 and 26%, respectively. This is due to the pozzolanic activity of these residues, which mainly occur in the form of medium and small capillaries in all the mortars studied, reducing the diameter of the pores.
{"title":"Investigation of the pore structure performance of dune sand mortar with ceramic waste","authors":"Abderrahmane Ghrieb, Yacine Abadou, Rosa Bustamante, María Isabel Sánchez de Rojas","doi":"10.1680/jensu.23.00024","DOIUrl":"https://doi.org/10.1680/jensu.23.00024","url":null,"abstract":"The use of construction waste in creating concrete and mortar is an important process that not only offers economic benefits but also helps protect the environment by reducing waste in rural and urban areas. This experimental study aims to investigate the effect of adding crushed ceramic waste (CCW) and crushed brick waste (CBW) on the bulk density, workability, compressive and flexural strengths, water absorption and microstructural properties of dune sand mortar. To determine changes in porosity, the study uses the mercury intrusion porosimetry technique to measure porosity and pore size distribution. Scanning electron microscopy and energy-dispersive X-ray spectroscopy analyses are conducted to examine the microstructure and size of the voids using an electron microscope, and photographs of voids in the mortar matrix are taken. By replacing 15% of the sand with CCW and CBW, the compactness and mechanical strength of the dune sand mortar are enhanced, increasing the dynamic modulus of elasticity by around 29 and 26%, respectively. This is due to the pozzolanic activity of these residues, which mainly occur in the form of medium and small capillaries in all the mortars studied, reducing the diameter of the pores.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138524908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As part of the energy transition and global environmental problems, improving the energy efficiency of buildings has become an imperative aspect for the architecture, engineering and construction industries. Furthermore, the energy performance of a building depends directly on the quality of its thermal envelope and the insulation material applied. Therefore, the main aim of this study is to assess by means of simulations the impact of ecological insulation materials on thermal comfort and energy efficiency in the case of a residential building in a Mediterranean climate. The results of the simulation show that optimising envelope design parameters can reduce annual energy loads for heating and for cooling. The most efficient strategies for achieving this reduction involve the use of ecological thermal insulation of external walls, optimising glazing settings and use of efficient shading devices.
{"title":"Improving energy efficiency and thermal comfort of building by natural fibre insulation materials","authors":"Kadi Yasmina, Ammar Korichi, Chadi Maalouf","doi":"10.1680/jensu.21.00003","DOIUrl":"https://doi.org/10.1680/jensu.21.00003","url":null,"abstract":"As part of the energy transition and global environmental problems, improving the energy efficiency of buildings has become an imperative aspect for the architecture, engineering and construction industries. Furthermore, the energy performance of a building depends directly on the quality of its thermal envelope and the insulation material applied. Therefore, the main aim of this study is to assess by means of simulations the impact of ecological insulation materials on thermal comfort and energy efficiency in the case of a residential building in a Mediterranean climate. The results of the simulation show that optimising envelope design parameters can reduce annual energy loads for heating and for cooling. The most efficient strategies for achieving this reduction involve the use of ecological thermal insulation of external walls, optimising glazing settings and use of efficient shading devices.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135293272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hui Yao, Yiran Wang, Pengrui Ma, Xin Li, Zhanping You
Asphalt pavement is the most widely used type of pavement in the world and is mainly utilized in the construction of infrastructures such as highways, urban roads, parking lots, and airstrips. The pavement maintenance technology and materials are gradually developing towards systematization and diversification with the extensive use of asphalt pavement. Choosing more economical technologies, and fast and sustainable materials is the future of asphalt pavement maintenance work. This paper provides an overview of asphalt pavement repair technology and asphalt pavement repair materials. We categorize and summarize the pavement repair technologies, which include cost-effective technologies such as crack sealing, overlay, seal coat, and hot-in-place recycling. Further, we summarized the repair materials applied in the repair technologies and compared the performance, cost-effectiveness, and sustainability of each type of material. The study shows that asphalt and cement are the most commonly used repair materials. The more potential, economical, and sustainable materials for asphalt pavement repair include epoxy resin, polyurethane, and hydrogel. The future of asphalt pavement repair requires advancing towards rapid, sustainable, environmentally friendly, and economical. The survey indicates that in addition to improving the performance of existing repair materials (e.g., modified asphalt, binder processes, material composition or ratios), attention can be given to new materials such as polyurethanes and hydrogels that have the potential for rapid repair and at low cost. More research can be done to perfect the application of new materials in road engineering.
{"title":"A literature review: asphalt pavement repair technologies and materials","authors":"Hui Yao, Yiran Wang, Pengrui Ma, Xin Li, Zhanping You","doi":"10.1680/jensu.22.10000","DOIUrl":"https://doi.org/10.1680/jensu.22.10000","url":null,"abstract":"Asphalt pavement is the most widely used type of pavement in the world and is mainly utilized in the construction of infrastructures such as highways, urban roads, parking lots, and airstrips. The pavement maintenance technology and materials are gradually developing towards systematization and diversification with the extensive use of asphalt pavement. Choosing more economical technologies, and fast and sustainable materials is the future of asphalt pavement maintenance work. This paper provides an overview of asphalt pavement repair technology and asphalt pavement repair materials. We categorize and summarize the pavement repair technologies, which include cost-effective technologies such as crack sealing, overlay, seal coat, and hot-in-place recycling. Further, we summarized the repair materials applied in the repair technologies and compared the performance, cost-effectiveness, and sustainability of each type of material. The study shows that asphalt and cement are the most commonly used repair materials. The more potential, economical, and sustainable materials for asphalt pavement repair include epoxy resin, polyurethane, and hydrogel. The future of asphalt pavement repair requires advancing towards rapid, sustainable, environmentally friendly, and economical. The survey indicates that in addition to improving the performance of existing repair materials (e.g., modified asphalt, binder processes, material composition or ratios), attention can be given to new materials such as polyurethanes and hydrogels that have the potential for rapid repair and at low cost. More research can be done to perfect the application of new materials in road engineering.","PeriodicalId":49671,"journal":{"name":"Proceedings of the Institution of Civil Engineers-Engineering Sustainability","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135634570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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