Pub Date : 2025-11-01DOI: 10.1016/j.dibe.2025.100792
Zheng Li , Guoqing Song , Qingwen Zhang , Yuliang Liu , Jiangtao Yu , Feng Fan
This study examined group differences in the crossed effects of indoor environmental parameters on human comfort in open-plan offices in severe cold regions, considering gender, age, education, BMI and seating location. Field measurements of thermal, acoustic, air quality, and lighting conditions were conducted in 22 offices with 1352 surveys. Thermal comfort was affected by illumination: at 20–23 °C, higher illuminance reduced thermal comfort, whereas lower illuminance enhanced coolness perception. Females tolerated higher CO2 (>1200 ppm) and noise (>52 dB) at low temperatures. Participants over 25 years old were more sensitive to the temperature–light crossed effect, and those with doctoral degrees were more responsive to air quality. Underweight subjects’ comfort was linked to PM2.5 concentration, while overweight subjects preferred low temperature and low light. For subjects near windows, low illumination improved thermal comfort in warm conditions, and for subjects near doors, low temperatures improved air quality comfort under high pollutants.
{"title":"A systematic investigation of group differences in crossed effects of indoor environmental parameters on human comfort in open-plan offices in severe cold regions","authors":"Zheng Li , Guoqing Song , Qingwen Zhang , Yuliang Liu , Jiangtao Yu , Feng Fan","doi":"10.1016/j.dibe.2025.100792","DOIUrl":"10.1016/j.dibe.2025.100792","url":null,"abstract":"<div><div>This study examined group differences in the crossed effects of indoor environmental parameters on human comfort in open-plan offices in severe cold regions, considering gender, age, education, BMI and seating location. Field measurements of thermal, acoustic, air quality, and lighting conditions were conducted in 22 offices with 1352 surveys. Thermal comfort was affected by illumination: at 20–23 °C, higher illuminance reduced thermal comfort, whereas lower illuminance enhanced coolness perception. Females tolerated higher CO<sub>2</sub> (>1200 ppm) and noise (>52 dB) at low temperatures. Participants over 25 years old were more sensitive to the temperature–light crossed effect, and those with doctoral degrees were more responsive to air quality. Underweight subjects’ comfort was linked to PM<sub>2.5</sub> concentration, while overweight subjects preferred low temperature and low light. For subjects near windows, low illumination improved thermal comfort in warm conditions, and for subjects near doors, low temperatures improved air quality comfort under high pollutants.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100792"},"PeriodicalIF":8.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01DOI: 10.1016/j.dibe.2025.100793
Sophie H. Gruber , Manuel Bode , Thomas Marcher , Roman Lackner
Crewed missions to Mars will require the construction of habitable structures using locally available materials due to limited cargo capacity from Earth. Both sulfur and regolith are abundant on Mars and can be processed to sulfur-concrete via melting of sulfur. This article investigates thermal and mechanical properties of three sulfur-concrete mixtures containing either Mars regolith simulant or standard sand. With average temperatures of about -60 °C and approx. 1/3 of the gravity we experience on Earth, Mars poses new challenges to construction materials. Based on experiment data, a regolith covered sulfur-concrete cupola on Mars is modeled to investigate the impact of thermal load cases. These include internal heating to 290 K (17 °C) and exposure to a one-year Martian temperature cycle from outside. Results reveal the level of loading experienced by the cupola (utilization in tension, risk of material failure), offering insights into potential improvements of material/structural performance.
{"title":"Thermomechanical loading scenarios of habitat structures on Mars: Experimental material characterization and numerical assessment of sulfur-concrete constructions","authors":"Sophie H. Gruber , Manuel Bode , Thomas Marcher , Roman Lackner","doi":"10.1016/j.dibe.2025.100793","DOIUrl":"10.1016/j.dibe.2025.100793","url":null,"abstract":"<div><div>Crewed missions to Mars will require the construction of habitable structures using locally available materials due to limited cargo capacity from Earth. Both sulfur and regolith are abundant on Mars and can be processed to sulfur-concrete via melting of sulfur. This article investigates thermal and mechanical properties of three sulfur-concrete mixtures containing either Mars regolith simulant or standard sand. With average temperatures of about -60<!--> <!-->°C and approx. 1/3 of the gravity we experience on Earth, Mars poses new challenges to construction materials. Based on experiment data, a regolith covered sulfur-concrete cupola on Mars is modeled to investigate the impact of thermal load cases. These include internal heating to 290<!--> <!-->K (<span><math><mo>≈</mo></math></span>17<!--> <!-->°C) and exposure to a one-year Martian temperature cycle from outside. Results reveal the level of loading experienced by the cupola (utilization in tension, risk of material failure), offering insights into potential improvements of material/structural performance.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100793"},"PeriodicalIF":8.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-29DOI: 10.1016/j.dibe.2025.100790
A. Aragón , O. Nieto , A. Rønning , E. Schulze , M.G. Alberti , R.M. Pavón
This research addresses the existing gaps in the incorporation of EPDs (environmental product declarations) digitalized according to the international standard ISO 22057 into the software tools used for sustainability assessment of buildings and infrastructures. The objective is to reduce the resources required for the transfer of EPD data into digital models.
The analysis included a scientific literature review, the assessments of published digital EPDs and the feedback from practitioners in the fields of LCA and BIM, based on a survey conducted in the international and European standardization committees and the replies from 45 experts.
This study identified nineteen gaps, with each gap receiving a thorough assessment, resulting in specific recommendations and future research directions. The solutions are presented in a structured manner to facilitate their implementation in the revision of ISO 22057.
The research was conducted for construction products’ environmental data, but most of the solutions are transferable to other types of product data and various sectors, thus extending beyond the construction industry.
{"title":"Gaps in the machine-interpretability of ISO 22057 EPDs: identification and proposals for a revised international standard","authors":"A. Aragón , O. Nieto , A. Rønning , E. Schulze , M.G. Alberti , R.M. Pavón","doi":"10.1016/j.dibe.2025.100790","DOIUrl":"10.1016/j.dibe.2025.100790","url":null,"abstract":"<div><div>This research addresses the existing gaps in the incorporation of EPDs (environmental product declarations) digitalized according to the international standard ISO 22057 into the software tools used for sustainability assessment of buildings and infrastructures. The objective is to reduce the resources required for the transfer of EPD data into digital models.</div><div>The analysis included a scientific literature review, the assessments of published digital EPDs and the feedback from practitioners in the fields of LCA and BIM, based on a survey conducted in the international and European standardization committees and the replies from 45 experts.</div><div>This study identified nineteen gaps, with each gap receiving a thorough assessment, resulting in specific recommendations and future research directions. The solutions are presented in a structured manner to facilitate their implementation in the revision of ISO 22057.</div><div>The research was conducted for construction products’ environmental data, but most of the solutions are transferable to other types of product data and various sectors, thus extending beyond the construction industry.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100790"},"PeriodicalIF":8.2,"publicationDate":"2025-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145520157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-27DOI: 10.1016/j.dibe.2025.100784
Sunnie Haam , Hyunseok Kim , Mintaek Yoo , Woo Seung Song
This study examines the optimal additional pathways to reduce the maximum evacuation time using Dijkstra's algorithm, targeting a deep underground station structure in Seoul. The reduction rates in the maximum evacuation time were evaluated across seven cases, including baseline scenarios without additional pathways. Pedestrian speed was adjusted by applying a crowd density-based reduction factor. The maximum evacuation time was 590 s without the additional pathways and 369 s when additional pathways were implemented on floors B2 and B1, representing a 37.5 % reduction. The most significant reduction occurred when pathways were simultaneously added on B6 and B1, as well as B2 and B1, resulting in a maximum evacuation time of 340 s, a 42.4 % decrease compared with the baseline scenario. These findings underscore the importance of constructing additional pathways to ensure occupants can evacuate within the 6-min golden time specified by the Korean Ministry of Land, Infrastructure, and Transport.
{"title":"Optimal additional evacuation route analysis in deep underground station structures using Dijkstra's algorithm","authors":"Sunnie Haam , Hyunseok Kim , Mintaek Yoo , Woo Seung Song","doi":"10.1016/j.dibe.2025.100784","DOIUrl":"10.1016/j.dibe.2025.100784","url":null,"abstract":"<div><div>This study examines the optimal additional pathways to reduce the maximum evacuation time using Dijkstra's algorithm, targeting a deep underground station structure in Seoul. The reduction rates in the maximum evacuation time were evaluated across seven cases, including baseline scenarios without additional pathways. Pedestrian speed was adjusted by applying a crowd density-based reduction factor. The maximum evacuation time was 590 s without the additional pathways and 369 s when additional pathways were implemented on floors B2 and B1, representing a 37.5 % reduction. The most significant reduction occurred when pathways were simultaneously added on B6 and B1, as well as B2 and B1, resulting in a maximum evacuation time of 340 s, a 42.4 % decrease compared with the baseline scenario. These findings underscore the importance of constructing additional pathways to ensure occupants can evacuate within the 6-min golden time specified by the Korean Ministry of Land, Infrastructure, and Transport.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100784"},"PeriodicalIF":8.2,"publicationDate":"2025-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-26DOI: 10.1016/j.dibe.2025.100788
Bo Yu , Zhaoyang Qiu , Vivian W.Y. Tam , Jian Zuo , Jiayuan Wang , Yifu Ou , Huanyu Wu , Zhikang Bao
Due to the negative externalities associated with construction and demolition waste (C&DW) landfilling, such facilities often face strong public opposition, commonly referred to as the “not in my backyard” (NIMBY) effect. Ecological compensation, a market-based mechanism that internalizes environmental externalities by offering economic incentives to affected stakeholders, has emerged as an effective strategy to mitigate NIMBY-related resistance. A critical aspect of implementing ecological compensation is identifying methods that are publicly acceptable, thereby addressing the question of “how to compensate.” This study aims to explore compensation approaches that are both suitable for C&DW landfilling and acceptable to local communities. A comprehensive literature review was first conducted to summarize existing ecological compensation mechanisms and identify those most applicable to C&DW landfilling. Using Shenzhen, China, as a case study, public preferences regarding different compensation methods were examined through questionnaires and semi-structured interviews. The findings explicitly reveal that financial compensation is the most preferred option among the public, followed by project-based compensation, with policy-related compensation being the least preferred. Specifically, the public prefers to receive financial compensation as a lump-sum bank transfer before landfill operations, favors local village collectives managing landfills with annual profit distribution for project-based compensation, and prioritizes housing expropriation and compensation policies for policy-related compensation. These findings offer valuable theoretical insights for the development of scientifically grounded and socially acceptable ecological compensation strategies in the context of C&DW landfilling.
{"title":"Public willingness to accept ecological compensation methods for construction and demolition waste landfilling","authors":"Bo Yu , Zhaoyang Qiu , Vivian W.Y. Tam , Jian Zuo , Jiayuan Wang , Yifu Ou , Huanyu Wu , Zhikang Bao","doi":"10.1016/j.dibe.2025.100788","DOIUrl":"10.1016/j.dibe.2025.100788","url":null,"abstract":"<div><div>Due to the negative externalities associated with construction and demolition waste (C&DW) landfilling, such facilities often face strong public opposition, commonly referred to as the “not in my backyard” (NIMBY) effect. Ecological compensation, a market-based mechanism that internalizes environmental externalities by offering economic incentives to affected stakeholders, has emerged as an effective strategy to mitigate NIMBY-related resistance. A critical aspect of implementing ecological compensation is identifying methods that are publicly acceptable, thereby addressing the question of “how to compensate.” This study aims to explore compensation approaches that are both suitable for C&DW landfilling and acceptable to local communities. A comprehensive literature review was first conducted to summarize existing ecological compensation mechanisms and identify those most applicable to C&DW landfilling. Using Shenzhen, China, as a case study, public preferences regarding different compensation methods were examined through questionnaires and semi-structured interviews. The findings explicitly reveal that financial compensation is the most preferred option among the public, followed by project-based compensation, with policy-related compensation being the least preferred. Specifically, the public prefers to receive financial compensation as a lump-sum bank transfer before landfill operations, favors local village collectives managing landfills with annual profit distribution for project-based compensation, and prioritizes housing expropriation and compensation policies for policy-related compensation. These findings offer valuable theoretical insights for the development of scientifically grounded and socially acceptable ecological compensation strategies in the context of C&DW landfilling.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100788"},"PeriodicalIF":8.2,"publicationDate":"2025-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-26DOI: 10.1016/j.dibe.2025.100791
Gitae Roh , Chi-Ho Jeon , Ji-Heon Shin , Chang-Su Shim , Byeongcheol Kim , Jaehwan Kim , Kyu-San Jung , Ki-Tae Park
Ensuring the safety of civil infrastructure, particularly bridges, is essential. Yet, conventional multi-sensor monitoring systems are often cost-prohibitive for large bridge networks. To address this, we propose an unsupervised online anomaly detection framework that relies on single-accelerometer data. Dynamic characteristics are extracted through random decrement and autoregressive modeling, while Mahalanobis Distance quantifies structural changes with reduced outlier influence. Temperature effects are corrected using a machine learning model. The framework was validated on four bridge types over more than one year of monitoring. Results show that the method effectively distinguishes transient events, such as sensor malfunctions or abnormal amplitudes, from permanent structural changes, exemplified by pavement replacement. In the latter case, the Mahalanobis Distance mean increased from 5.2 to 11.5 (121 %), demonstrating sensitive detection of system changes. These findings highlight the framework's potential as a cost-effective tool for early anomaly warning and preventive maintenance in large bridge inventories.
{"title":"Unsupervised online anomaly detection in road bridges from single-point acceleration data","authors":"Gitae Roh , Chi-Ho Jeon , Ji-Heon Shin , Chang-Su Shim , Byeongcheol Kim , Jaehwan Kim , Kyu-San Jung , Ki-Tae Park","doi":"10.1016/j.dibe.2025.100791","DOIUrl":"10.1016/j.dibe.2025.100791","url":null,"abstract":"<div><div>Ensuring the safety of civil infrastructure, particularly bridges, is essential. Yet, conventional multi-sensor monitoring systems are often cost-prohibitive for large bridge networks. To address this, we propose an unsupervised online anomaly detection framework that relies on single-accelerometer data. Dynamic characteristics are extracted through random decrement and autoregressive modeling, while Mahalanobis Distance quantifies structural changes with reduced outlier influence. Temperature effects are corrected using a machine learning model. The framework was validated on four bridge types over more than one year of monitoring. Results show that the method effectively distinguishes transient events, such as sensor malfunctions or abnormal amplitudes, from permanent structural changes, exemplified by pavement replacement. In the latter case, the Mahalanobis Distance mean increased from 5.2 to 11.5 (121 %), demonstrating sensitive detection of system changes. These findings highlight the framework's potential as a cost-effective tool for early anomaly warning and preventive maintenance in large bridge inventories.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100791"},"PeriodicalIF":8.2,"publicationDate":"2025-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-25DOI: 10.1016/j.dibe.2025.100787
Chun Sik Kim , Melaku N. Seifu , Seonhyeok Kim , Naru Kim , Joonho Seo , Jinman Kim , Solmoi Park
The composition of Portland cement clinker is crucial for determining the hydration and phase assemblages of blended cement systems incorporating supplementary cementitious materials (SCMs). This study investigates the influence of cement clinker compositions on the degree of reaction of fly ash and slag, and the phase evolution in blended systems. Thermodynamic modelling was employed to calculate the mineralogical compositions of clinkers from simulated raw materials and phase assemblages of blended cements, while the reaction degrees of SCMs were predicted using a machine learning model. The results indicate that a C3S content of approximately 57 % is optimal, as it maintains sufficient portlandite availability for SCM dissolution. Fly ash showed greater dependency on portlandite availability, whereas slag exhibited higher intrinsic reactivity even at lower C3S levels. These results highlight the impact of clinker composition and SCM replacement levels on hydration products, providing insights for optimizing cement formulations from production to hydration.
{"title":"Thermodynamic optimization of Portland cement clinkers for designing SCM-blended cements","authors":"Chun Sik Kim , Melaku N. Seifu , Seonhyeok Kim , Naru Kim , Joonho Seo , Jinman Kim , Solmoi Park","doi":"10.1016/j.dibe.2025.100787","DOIUrl":"10.1016/j.dibe.2025.100787","url":null,"abstract":"<div><div>The composition of Portland cement clinker is crucial for determining the hydration and phase assemblages of blended cement systems incorporating supplementary cementitious materials (SCMs). This study investigates the influence of cement clinker compositions on the degree of reaction of fly ash and slag, and the phase evolution in blended systems. Thermodynamic modelling was employed to calculate the mineralogical compositions of clinkers from simulated raw materials and phase assemblages of blended cements, while the reaction degrees of SCMs were predicted using a machine learning model. The results indicate that a C<sub>3</sub>S content of approximately 57 % is optimal, as it maintains sufficient portlandite availability for SCM dissolution. Fly ash showed greater dependency on portlandite availability, whereas slag exhibited higher intrinsic reactivity even at lower C<sub>3</sub>S levels. These results highlight the impact of clinker composition and SCM replacement levels on hydration products, providing insights for optimizing cement formulations from production to hydration.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100787"},"PeriodicalIF":8.2,"publicationDate":"2025-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145466068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-24DOI: 10.1016/j.dibe.2025.100786
Arjun Poudel , Seungwon Kim , Jae Yeol Song , Janghwan Kim
The natural frequencies of composite bridges are affected by temperature variations and boundary conditions, presenting challenges for damage-detection methods based on these parameters. In this study, the individual and combined effects of temperature variations and boundary condition changes were investigated both numerically and experimentally. Temperature variations included uniform temperature fields and temperature gradients within the bridge section. For modal testing, a temperature-controllable composite girder with adjustable supports was developed. Numerical analysis further evaluated the influence of temperature and boundary condition changes on natural frequencies. The results demonstrated that changes in geometric stiffness due to the combined effects of temperature and boundary conditions, as well as the temperature-dependent behavior of the elastic modulus, significantly affected the natural frequencies.
{"title":"Modal frequency responses of composite bridges under temperature and boundary condition variations","authors":"Arjun Poudel , Seungwon Kim , Jae Yeol Song , Janghwan Kim","doi":"10.1016/j.dibe.2025.100786","DOIUrl":"10.1016/j.dibe.2025.100786","url":null,"abstract":"<div><div>The natural frequencies of composite bridges are affected by temperature variations and boundary conditions, presenting challenges for damage-detection methods based on these parameters. In this study, the individual and combined effects of temperature variations and boundary condition changes were investigated both numerically and experimentally. Temperature variations included uniform temperature fields and temperature gradients within the bridge section. For modal testing, a temperature-controllable composite girder with adjustable supports was developed. Numerical analysis further evaluated the influence of temperature and boundary condition changes on natural frequencies. The results demonstrated that changes in geometric stiffness due to the combined effects of temperature and boundary conditions, as well as the temperature-dependent behavior of the elastic modulus, significantly affected the natural frequencies.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100786"},"PeriodicalIF":8.2,"publicationDate":"2025-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The construction sector is seeking sustainable alternatives to reduce CO2 emissions, with cement replacement being a key strategy. Mineralised steel slag is a promising binder due to its reactive CaO and MgO content, enabling CO2 sequestration via accelerated carbonation while maintaining mechanical performance. Incorporating textile waste cotton fibres offers complementary benefits, enhancing flexural strength and potentially increasing CO2 uptake through improved porosity and carbonation pathways. Given the global textile waste surplus and low recycling rates, this approach supports circular economy goals. This study examines composites combining carbonated steel slag with synthetic cotton fibres at three dosages, assessing carbonation uptake and flexural strength under standard curing and wet–dry ageing cycles. Results indicate that fibres promote higher CO2 uptake by creating diffusion channels and improve mechanical behaviour, particularly at higher dosages. Although durability cycles reduce toughness, they enhance environmental performance by facilitating greater carbonation.
{"title":"Evaluating the influence of synthetic cotton textile waste fibres on CO2 uptake, flexural strength, and wet-dry ageing of slag-based binders","authors":"Anabel Castillo-Rodríguez , Antonia Pacios-Álvarez , João Castro-Gomes , Justo García-Navarro","doi":"10.1016/j.dibe.2025.100785","DOIUrl":"10.1016/j.dibe.2025.100785","url":null,"abstract":"<div><div>The construction sector is seeking sustainable alternatives to reduce CO<sub>2</sub> emissions, with cement replacement being a key strategy. Mineralised steel slag is a promising binder due to its reactive CaO and MgO content, enabling CO<sub>2</sub> sequestration via accelerated carbonation while maintaining mechanical performance. Incorporating textile waste cotton fibres offers complementary benefits, enhancing flexural strength and potentially increasing CO<sub>2</sub> uptake through improved porosity and carbonation pathways. Given the global textile waste surplus and low recycling rates, this approach supports circular economy goals. This study examines composites combining carbonated steel slag with synthetic cotton fibres at three dosages, assessing carbonation uptake and flexural strength under standard curing and wet–dry ageing cycles. Results indicate that fibres promote higher CO<sub>2</sub> uptake by creating diffusion channels and improve mechanical behaviour, particularly at higher dosages. Although durability cycles reduce toughness, they enhance environmental performance by facilitating greater carbonation.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100785"},"PeriodicalIF":8.2,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145363256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-19DOI: 10.1016/j.dibe.2025.100783
Maggie Y. Gao, Chengjia Han, Yiqing Dong, Robert L.K. Tiong, Yaowen Yang
This research presents an integrated framework for automatic trajectory planning and Scan-vs-BIM for quality inspection. The methodology combines optimized viewpoint planning for structured light scanning with advanced point cloud processing algorithms for rebar detection and measurement. Key innovations include an enhanced greedy algorithm for coverage analysis considering key features and overall structure, and an advanced cylinder fitting approach combining RANSAC and least-squares minimization for diameter estimation. This study achieves 94 % accuracy in H16 rebar dimensional measurement. A photogrammetry-based enhancement technique successfully restores missing elements to 96.79 % length completeness. The comparative analysis demonstrates that the advanced cylinder fitting method excels with complete point clouds, while advanced sectional analysis performs better for fragmented data. This study establishes a robust foundation for automated reinforcement inspection, significantly improving efficiency and accuracy compared to traditional methods while reducing reliance on manual inspection.
{"title":"Automated construction quality monitoring using trajectory planning and scan-vs-BIM integration","authors":"Maggie Y. Gao, Chengjia Han, Yiqing Dong, Robert L.K. Tiong, Yaowen Yang","doi":"10.1016/j.dibe.2025.100783","DOIUrl":"10.1016/j.dibe.2025.100783","url":null,"abstract":"<div><div>This research presents an integrated framework for automatic trajectory planning and Scan-vs-BIM for quality inspection. The methodology combines optimized viewpoint planning for structured light scanning with advanced point cloud processing algorithms for rebar detection and measurement. Key innovations include an enhanced greedy algorithm for coverage analysis considering key features and overall structure, and an advanced cylinder fitting approach combining RANSAC and least-squares minimization for diameter estimation. This study achieves 94 % accuracy in H16 rebar dimensional measurement. A photogrammetry-based enhancement technique successfully restores missing elements to 96.79 % length completeness. The comparative analysis demonstrates that the advanced cylinder fitting method excels with complete point clouds, while advanced sectional analysis performs better for fragmented data. This study establishes a robust foundation for automated reinforcement inspection, significantly improving efficiency and accuracy compared to traditional methods while reducing reliance on manual inspection.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"24 ","pages":"Article 100783"},"PeriodicalIF":8.2,"publicationDate":"2025-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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