Article
Construction & Building Technology
Soheil Jahandari, Zhong Tao, Mohammad Saberian, Mahdi Shariati, Jie Li, Masoumeh Abolhasani, Mostafa Kazemi, Aida Rahmani, Maria Rashidi
Summary: The research found that the combined application of lime and geogrid to clayey subgrade significantly enhanced its ductility and geotechnical characteristics, but excessive water pressure caused separation between geogrid layers and subgrade, leading to reduced uniformity and consistency. Moreover, controlling moisture to optimal levels can maximize the performance of subgrade, while excess moisture beyond optimal levels resulted in more voids, decreasing geotechnical properties.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Construction & Building Technology
Yanan Wang, Yujia Niu, Meng Li, Qianyu Yu, Wei Chen
Summary: This study calculates the spatial structure index of six urban agglomerations in China and analyzes the impact of spatial structure on carbon emissions using the Geographically and Temporally Weighted Regression (GTWR) model. The findings show that the multi-center structure of some urban agglomerations does not achieve the effect of carbon emission reduction, but promotes carbon emission.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Construction & Building Technology
Saeed Tahir, Abdelouahed Tounsi, Abdelbaki Chikh, Mohammed A. Al-Osta, Salah U. Al-Dulaijan, Mesfer M. Al-Zahrani
Summary: This article proposes a seismic design method for low-rise reinforced concrete special moment frame buildings, aiming to make the buildings ductile and able to withstand severe levels of earthquake shaking without collapsing through appropriate sizing and reinforcement detailing.
STEEL AND COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Yang Chen, Jun Yang, Ruxin Yang, Xiangming Xiao, Jianhong (Cecilia) Xia
Summary: This study utilized map data and remote sensing images to identify urban functional zones in Shenyang, and evaluated their impact on the urban thermal environment. The results revealed a gradual decrease in land surface temperature in the city center, with public service facility land having the greatest influence on the urban thermal environment.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Hanghua Zhang, Jianzhuang Xiao, Yuxiang Tang, Zhenhua Duan, Chi-sun Poon
Summary: This study investigated the effects of different aggregate combinations on the long-term mechanical and shrinkage properties of fully recycled aggregate concrete (FRAC). It was found that using fully recycled aggregate combinations had negative effects on the concrete properties, and the effect caused by fully recycled aggregate combination was higher than the sum of the effects caused by fully recycled coarse aggregate and fully recycled fine aggregate combination. Additionally, the study examined the impact of recycled powder (RP) on FRAC properties and found that RP content affected the mechanical properties and shrinkage strain of FRAC.
CEMENT & CONCRETE COMPOSITES
(2022)
Review
Construction & Building Technology
Bai Zhang, Hong Zhu, Yuzhu Cheng, Ghasan Fahim Huseien, Kwok Wei Shah
Summary: Alkali-activated binders are considered promising alternatives to ordinary Portland cement due to their positive environmental effects and excellent mechanical properties and durability. However, significant shrinkage in alkali-activated composite systems can lead to harmful cracking, affecting the durability of concrete structures. Various shrinkage-mitigating strategies have been explored to enhance the mechanical behavior and reduce shrinkage in alkali-activated slag systems.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Construction & Building Technology
Chengcheng Wen, Peng Zhang, Juan Wang, Shaowei Hu
Summary: This paper introduces the enhancement mechanisms of various fibers on ultra-high-performance concrete (UHPC) and reviews the effects of these fibers on the mechanical properties, fiber-matrix bonding behavior, and durability of UHPC. The study also summarizes empirical formulas and theoretical models for predicting the properties of UHPC. The results suggest that fibers have the potential to enhance the strength of UHPC and the optimal fiber volume fraction may depend on the fiber type.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Van Quan Tran, Viet Quoc Dang, Lanh Si Ho
Summary: This study focused on evaluating the compressive strength of concrete made from recycled concrete aggregate (RCA) using different single and hybrid machine learning models. The results showed that the hybrid models outperformed single models in terms of prediction accuracy. This research provides valuable insights for the systematic evaluation of compressive strength prediction of recycled concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Wanhui Feng, Yufei Wang, Junbo Sun, Yunchao Tang, Dongxiao Wu, Zhiwei Jiang, Jianqun Wang, Xiangyu Wang
Summary: The study investigated the mechanical characteristics of rubber-modified recycled aggregate concrete (RRAC) prepared from recycled aggregate (RA) and waste rubber particles (RPs) exposed to different temperatures. Results showed relationships between various parameters and established accurate predictive models for UCS and peak strain.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Yang Yu, Bijan Samali, Maria Rashidi, Masoud Mohammadi, Thuc N. Nguyen, Guang Zhang
Summary: This paper proposes a vision-based automated method for surface condition identification of concrete structures, which utilizes pre-trained CNNs, transfer learning, and decision-level image fusion to improve the accuracy of crack detection. The method is validated using a large dataset and shows superiority over single CNN models.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Leonora Charlotte Malabi Eberhardt, Morten Birkved, Harpa Birgisdottir
Summary: The environmental impacts, resource consumption and waste generation from buildings have raised concerns in the political and industry sectors. Interest in adopting circular economy strategies to address these issues has grown, but there is still a lack of widespread adoption and fragmented development and implementation of circular economy strategies in the building industry. A systematic literature review was conducted to assess the connection between circular economy and design and construction strategies for new buildings. The study reveals the development of this field and provides directions for future research. The study also highlights the lack of knowledge about the environmental performance and benefits of different building design and construction strategies, which hinders the greater adoption of circular economy in the industry.
ARCHITECTURAL ENGINEERING AND DESIGN MANAGEMENT
(2022)
Review
Construction & Building Technology
Hemn Unis A. Ahmed, Azad S. Mohammed, Ahmed Mohammed
Summary: Geopolymers are innovative cementitious materials that can potentially replace traditional Portland cement. The addition of nanoparticles enhances the properties of geopolymer composites, improving strength, durability, and microstructure.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Construction & Building Technology
Beibei Sun, Guang Ye, Geert de Schutter
Summary: In this paper, the mechanical properties and reaction mechanisms of alkali-activated materials such as blast furnace slag (BFS-AAM), fly ash (FA-AAM), and the combination of BFS and FA (BFS/FA-AAM) are reviewed. The factors influencing the strength of these materials and the control factors are summarized. The study reveals that ion concentrations determined by the control factors play a decisive role in strength development.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Xiao Li, Weisheng Lu, Fan Xue, Liupengfei Wu, Rui Zhao, Jinfeng Lou, Jinying Xu
Summary: This study proposes a novel system architecture for a blockchain-enabled IoT-BIM platform and confirms its effectiveness in supply chain management through a case study.
JOURNAL OF CONSTRUCTION ENGINEERING AND MANAGEMENT
(2022)
Article
Construction & Building Technology
Caleb Debrah, Albert Ping Chuen Chan, Amos Darko
Summary: Despite the crucial role of green finance in green buildings, limited research and investment have been dedicated to this area. Asia has been the largest contributor in research in this field, yet it remains highly under-researched. The study highlights future research directions and emphasizes the need to enhance attention on the application of green finance in green buildings.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Yuejing Gao, Jingyuan Zhao, Li Han
Summary: This study investigated the relationship between urban morphology and the urban heat island (UHI) effect at the block level using geographically weighted regression (GWR) models. The results showed significant spatial variations of different variables, with impervious surface ratio (ISR) and building density (BD) intensifying the UHI effect while green ratio (GR) forming a cool urban island in dense urban areas. The findings suggest that morphological variables significantly impact the UHI effect, emphasizing the importance of considering spatial context in sustainable urban planning.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Review
Construction & Building Technology
Shaker M. A. Qaidi, Dawood Sulaiman Atrushi, Ahmed S. Mohammed, Hemn Unis Ahmed, Rabar H. Faraj, Wael Emad, Bassam A. Tayeh, Hadee Mohammed Najm
Summary: This paper provides a state-of-the-art review of the technical and production properties of ultra-high-performance geopolymer concrete (UHP-GPC), including environmental parameters, mix design, mechanical properties, durability properties, microstructural properties, and the relationship between compressive strength and other properties.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Federica Marando, Mehdi P. Heris, Grazia Zulian, Angel Udias, Lorenzo Mentaschi, Nektarios Chrysoulakis, David Parastatidis, Joachim Maes
Summary: The Urban Heat Island effect is a harmful environmental hazard for urban residents, and its intensity is expected to increase with climate change. Urban Green Infrastructure can help reduce the intensity of the UHI effect, contributing to resilient urban environments and climate change adaptation and mitigation. It is necessary to integrate UGI into urban planning and legislation, supported by widely applicable and easily accessible quantitative evidence.
SUSTAINABLE CITIES AND SOCIETY
(2022)
Article
Construction & Building Technology
Zeynep Duygu Tekler, Raymond Low, Chau Yuen, Lucienne Blessing
Summary: This paper proposes a novel IoT-based plug load management system called Plug-Mate, which reduces energy consumption and user burden through intelligent automation. Different control strategies were evaluated and the optimal balance between automation and user control was found.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Grzegorz Ludwik Golewski
Summary: This article investigates the fracture mechanics parameters of concretes made with quaternary binders. By partially replacing ordinary Portland cement with a combination of fly ash, silica fume, and nanosilica, the composition of 80% OPC, 5% FA, 10% SF, and 5% nS shows the best results.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
