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Dissolution mechanisms of gypsum, bassanite, and anhydrite: A molecular dynamics simulation approach Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-11 Brayan Alberto Arenas-Blanco, Anderson Arboleda-Lamus, Mack Cleveland, Perla B. Balbuena, Jeffrey W. Bullard
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Chloride binding of cement paste containing wet carbonated recycled concrete fines Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-11 Yuguang Mao, Zhenguo Shi, Xiang Hu, Amani Khaskhoussi, Caijun Shi
The overall effect of wet carbonation recycled concrete fines (RCF) on the chloride binding capacity of cement paste was quantitatively decoupled into the effect of paste pH reduction, and the contribution of each component (uncarbonated phase, CaCO3, silica gel) in the wet carbonated RCF. Results indicate that incorporating wet carbonated RCF decreases both the chemical and physical chloride binding
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UR2: Ultra-rapid reactivity test for real-time, low-cost quality control of calcined clays Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-10 Yujia Min, Hossein Kabir, Chirayu Kothari, M. Farjad Iqbal, Nishant Garg
To reduce cement's carbon footprint, there is growing interest in commercial adoption of sustainable SCMs such as calcined clays. However, the existing ASTM standard (R3 test, C1897) to test the reactivity of such clays takes up to 7?days and cannot be used for real-time quality control in an industrial setting. We address this issue by introducing a 5-min Ultra-Rapid Reactivity (UR2) test. By dissolving
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Self-healing performance of thermally damaged ultra-high performance concrete: Rehydration and recovery mechanism Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-11 Xudong Zhao, Jian-Xin Lu, Weichen Tian, Martin Cyr, Arezki Tagnit-Hamou, Chi Sun Poon
Concrete suffers significant performance degradation when exposed to high temperatures. This study explored the beneficial role of waste glass powder (WGP) in mitigating thermal damage and ultra-high performance concrete (UHPC) after elevated temperature exposure. The mechanism was elucidated through the chemical and microstructure changes, the composition of hydrates after exposure to elevated temperatures
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Does the hydration process of supplementary cementitious materials affect the aging creep of blended cement paste? Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-11 Jiawei Wang, Xiaohong Zhu, Jun Wang, Yang Chen, Yuanpeng Liu, Zhangli Hu, Jiaping Liu, Roya Maboudian, Paulo J.M. Monteiro
In cementitious materials, continuous hydration of mineral phases and creep always coexist, making it difficult to decouple the effect of hydration on creep measurements, which are invariably time-dependent. This study compares a real hydration (aging) system with an equivalent hydration (non-aging) system. In the non-aging system, the unhydrated phase was replaced with inert quartz at specific ages
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New insights into the retardation mechanism of phosphorus slag on the early cement hydration Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Shiyu Zhuang, Qiang Wang, Yichen Shan, Ruiquan Jia, Zihan Zhou
Phosphorus slag (PS) is widely reported to retard the cement hydration due to the existence of phosphorus and fluorine in it. However, the key role and its corresponding mechanism have not been fully reported. In this study, the effects of PS on the early cement hydration were investigated from the insights of solid phases, aqueous species and microstructures evolution. Results show that PS remarkably
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Optimization and performance regulation of pipe piles based on nano-calcium silicate hydrated (n-C-S-H) Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Xiaofeng Han, Penggang Wang, Zijun Ling, Rihong Zhang, Zhenxing Du, Mengzhuo Sun, Xiaomeng Sui, Dongxuan Wei
Prestressed high-strength concrete (PHC) pipe piles are widely used in various construction projects. However, higher steam curing temperatures and times in the preparation of pipe piles severely affect material performance, while increasing cost and environmental pollution. This study investigates the use of nanoscale calcium-silicate-hydrate (n-C-S-H) to reduce curing temperature and time, ensuring
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An interactive cross‐multi‐feature fusion approach for salient object detection in crack segmentation Comput. Aided Civ. Infrastruct. Eng. (IF 8.5) Pub Date : 2025-02-11 Jian Liu, Pei Niu, Lei Kou, Yalin Zhang, Honglei Chang, Feng Guo
Salient object detection (SOD) is a crucial preprocessing technique in visual computing, which identifies the salient regions in an image by simulating the human visual perception system. It achieves remarkable results in tasks such as image quality assessment, editing, and object recognition. However, due to the particularity of pavement crack detection in terms of scale and feature requirements,
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The interaction mechanism of polycarboxylate and β-naphthalene sulfonate superplasticizers: Synergistic adsorption rather than competitive adsorption Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-10 Tianfeng Zhou, Haotian Duan, Beibei Li, Yuxia Pang, Hongming Lou, Dongjie Yang, Xueqing Qiu
The challenge of compatibility between polycarboxylate superplasticizer (PCE) and β-naphthalene sulfonate superplasticizer (BNS) remains an enduring puzzle, requiring a comprehensive understanding of their interaction mechanism. In our study, the macroscopic properties, microscopic interfacial adsorption, and intermolecular forces are investigated in detail to elucidate the interaction between PCE
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A new approach for constructing UHPC conductive pathways: Oriented deposition of conductive hydration products Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-10 Minjie Jia, Xiangyi Chen, Zhichao Xu, Juncheng Wen, Yingzi Yang, Kunyang Yu, Yushi Liu
Regulating the resistivity of ultra-high-performance concrete (UHPC) infrastructure is crucial for endowing UHPC with intelligence and multifunctionality. In this study, we proposed a new approach to enhance the electrical conductivity of UHPC via high-temperature electric induction. When the temperature of electric-cured UHPC was heated to 90–130?°C, the resistivity dropped sharply. After electric
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Hydration and physicochemical immobilization mechanisms of pozzolanic-hazardous waste in supersulfated cement Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-10 Jiaxing Ban, Jian-Xin Lu, Bin Ma, Ligang Peng, Hongjian Du, Dingqiang Fan, Jun Yao, Baoshan Xing, Chi Sun Poon
Ordinary Portland cement (OPC) is a versatile cement binder suitable for solidifying hazardous wastes, while its production induces significant carbon emissions. This study developed a novel low-carbon supersulphated phosphogypsum slag cement (SPSC) with the inclusion of pozzolanic-hazardous waste and investigated the synergetic mechanism of its pozzolanic reaction and immobilization behavior. The
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Mechanical behavior of concrete under high water pressure: Water penetration as a critical factor for mechanical properties Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-08 Atichon Kunawisarut, Yuichiro Kawabata, Mitsuyasu Iwanami
The combined effects of water pressure and water penetration on the mechanical behavior of concrete under hydraulic loading were investigated. When concrete is subjected to water pressure, a saturated zone forms near the surface and gradually progresses toward the interior over time, resulting in a non-homogeneous hybrid state with a saturated envelope and humid core (hybrid saturated state) during
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Grain-scale stress heterogeneity in concrete from in-situ X-ray measurements Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-08 Mohmad M. Thakur, N. Axel Henningsson, Jonas Engqvist, Pierre-Olivier Autran, Jonathan P. Wright, Ryan C. Hurley
Concrete features significant microstructural heterogeneity which affects its mechanical behavior. Strain localization in the matrix phase of concrete has received significant attention due to its relation to microcracking and our ability to quantify it with X-ray computed tomography (XRCT). In contrast, stresses in sand and aggregates remain largely unmeasured but remain critical for micromechanics-based
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Effects of multi-sized glass fiber-reinforced polymer waste on hydration and mechanical properties of cement-based materials J. Build. Eng. (IF 6.7) Pub Date : 2025-02-08 Zhizong Tian, Qianqian Wang, Shuguang Hou, Xiaodong Shen
Utilization of recycled glass fiber reinforced polymers (GFRP) is challenging due to their non-degradability and complex composition. This work explored an application route to produce supplementary cementitious material (SCM) and fine aggregate (FA) with mechanical processed GFRP wastes. A novel GFRP-Sand composite fine aggregate (GSCA) was developed with a combination progress of multi-particle size
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Improved mechanical and thermal properties of sustainable ultra-high performance geopolymer concrete with cellulose nanofibres J. Build. Eng. (IF 6.7) Pub Date : 2025-02-08 Yuekai Xie, Chenman Wang, Yingying Guo, Hanwen Cui, Jianfeng Xue
Although the application of the cellulose nanofibre (CNF) on the mechanical performance of conventional ultra-high performance concrete (UHPC) and geopolymer materials have been extensively studied, the effects of CNF on the mechanical and thermal behaviour of ultra-high performance geopolymer concrete (UHPGC) have not been well understood. This paper presents a laboratory study on the mechanical properties
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Mechanical and environmental properties of limestone calcined coal gangue based cementitious materials J. Build. Eng. (IF 6.7) Pub Date : 2025-02-08 Junfei Zhang, Xiaoli Huang, Ling Wang, Moncef L. Nehdi, Gulbostan Tursun, Lei Zhang
The cement industry is one of the major sources of global carbon dioxide (CO?) emissions, and sustainable solutions are urgently needed to reduce its environmental impact. This study focuses on the synergistic effects of thermally activated coal gangue powder (ACGP) and limestone powder (LSP) in enhancing the mechanical properties and microstructure of composite cementitious materials. Experimental
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Digital-Volume-Correlation-Assisted Crack Extraction using X-ray Computed Tomography Images of Cementitious Materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-07 Shuxian Hong, Zhongbo Yuan, Disheng Pan, Chuan Kuang, Biqin Dong, Shengxin Fan
The image segmentation results for microcrack detection suffer from poor continuity and integrity due to noise, grayscale inhomogeneity, and the very small size of microcrack voxels. Strain information is introduced to aid crack recognition and reduce the impact of image accuracy on crack detection. A new crack detection method is proposed that combines image processing and digital volume correlation
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Compaction test of rolled rockfill material using multimodal Rayleigh wave dispersion inversion Autom. Constr. (IF 9.6) Pub Date : 2025-02-07 Yao Wang, Hai Liu, Xu Meng, Guiquan Yuan, Huiguo Wang, Ruige Shi, Mengxiong Tang, Billie F. Spencer
This paper investigated the potential of Rayleigh wave multimodal dispersion inversion to advance automatic construction through real-time, in-situ measurement of rockfill compaction. An acquisition system and inversion method were developed to automate the process of obtaining compaction depth profiles and implemented during a dynamic rolling test. A rockfill layer under 2?m was tested, with Rayleigh
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Microcrack investigations of 3D printing concrete using multiple transformer networks Autom. Constr. (IF 9.6) Pub Date : 2025-02-07 Hongyu Zhao, Xiangyu Wang, Zhaohui Chen, Xianda Liu, Yufei Wang, Jun Wang, Junbo Sun
Extrusion-filament and no-framework craft significantly influence microcracks in 3D printing concrete (3DPC). A detailed analysis of these microcracks is essential to improve overall performance of material. However, fast and automated methods for capturing and measuring representative microcrack information in 3DPC are currently lacking. This paper presents a transformer based method for automatic
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Full-scale experimental study on the natural gas explosion mechanism in utility tunnels Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-07 Yonghong Gao, Yapeng Duan, Hao Wu, Kai Xin, Chaoyuan Huang, Liqiang Zhou, Dongyang Li, Zicong Wang
Utility tunnels are important underground spaces for the centralised storage of municipal pipelines, and their safe and efficient operation is related to city stability. As important and dangerous municipal pipelines, natural gas pipelines pose great risks to the safe operation of utility tunnels. To reveal the mechanism and damage of natural gas explosions in utility tunnels and reduce the harm of
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Tensile behavior simulation of ECC/SHCC at subzero temperatures based on a fiber/interface combination constitutive model Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-06 Yanlin Huo, Xiaoyu Han, Chunran Wu, Dong Lu, Huayang Sun, Zhitao Chen, Yingzi Yang, Victor C. Li
The performance degradation of Engineered Cementitious Composites/ Strain-hardening cementitious composites (ECC/SHCC) at subzero temperatures is becoming a widespread concern. However, experimental testing and data acquisition in cold environments are very difficult and demanding. It is an inevitable trend to use numerical simulation for research. In this paper, a finite element model based on a fiber/interface
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New insight into the effects of silane-modified silica fume on the performance of cement pastes Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-06 Yanrong Zhang, Xuesong Zhang, Zichen Lu, Kai Wu, Xiaopei Cai
Hydrophobic-modified silica fume (HSF) with superior dispersion was synthesized by coating silane onto SF surface. Its influence on cement hydration, microstructure and properties of cement pastes was investigated. Results indicated that the silane on SF surface visibly depressed pozzolanic reaction at early ages. HSF retarded cement hydration by adsorbing on cement surface and more importantly, by
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Development of 3D-printable alkali-activated GGBFS and fly ash binder-based mortars with concrete demolition waste as aggregates Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-06 M. Gurunandan, Aparna Sai Surya Sree Nedunuri, Jayant Tanwar, Prakash Nanthagopalan, Salman Muhammad
3D-printable alkali-activated mortar mixtures using concrete demolition waste (CDW) as aggregates, which are pumpable, extrudable, buildable up to 1000?mm with an open time of 180?minutes were developed in this study. The mixtures provided a minimum compressive strength of 50?MPa at 28 days age. The effect of various parameters such as binder composition, water-to-binder ratio, molar modulus and activator
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Transformer-based deep learning model and video dataset for installation action recognition in offsite projects Autom. Constr. (IF 9.6) Pub Date : 2025-02-06 Junyoung Jang, Eunbeen Jeong, Tae Wan Kim
This paper developed and evaluated the Precast Concrete Installation Dataset (PCI-Dataset), a large-scale video dataset for automatically recognizing precast concrete (PC) installation activities. The dataset comprises 12,791 video clips (5?s each, 1080?×?1080 resolution, 30fps) from actual PC construction sites, including 12 balanced activity classes combining three component types and four work stages
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Change detection network for construction housekeeping using feature fusion and large vision models Autom. Constr. (IF 9.6) Pub Date : 2025-02-06 Kailai Sun, Zherui Shao, Yang Miang Goh, Jing Tian, Vincent J.L. Gan
Although poor housekeeping leads to construction accidents, there is limited technological research on it. Existing methods for detecting poor housekeeping face many challenges, including limited explanations, lack of locating of poor housekeeping and annotated datasets. To address these challenges, this paper proposes the Housekeeping Change Detection Network (HCDN), integrating a feature fusion module
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Digital twin-based fatigue life assessment of orthotropic steel bridge decks using inspection robot and deep learning Autom. Constr. (IF 9.6) Pub Date : 2025-02-06 Fei Hu, Hongye Gou, Haozhe Yang, Yi-Qing Ni, You-Wu Wang, Yi Bao
Fatigue cracks are a major issue affecting the lifespan and operation and maintenance (O&M) costs of bridges with orthotropic steel decks (OSDs), while current practices for detecting fatigue cracks often rely on manual inspection with time inefficiency. This paper presents a digital twin framework that employs robots equipped with nondestructive testing devices for data collection and deep learning
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Corrigendum to “A methodology for sky-space-ground integrated remote sensing monitoring: A digital twin framework for multi-source Data-BIM integration in residential quality monitoring” [J. Build. Eng. 102 (2025) 11976] J. Build. Eng. (IF 6.7) Pub Date : 2025-02-06 Ming Guo, Xiangling Wu, Huihui Qi, Ying Zhang, Jiangjihong Chen, Yaxuan Wei, Xiaolan Zhang, Xiaoke Shang
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Effect of rubber granule size range and morphology on the compressive strength of rubber mortar J. Build. Eng. (IF 6.7) Pub Date : 2025-02-06 Ze Li, Hao Jin, Boxu Sun
Rubber mortar is increasingly utilized in transportation, construction, and repair projects, where compressive strength serves as a critical performance indicator. The size range and morphology of rubber granules significantly influence the compressive strength of rubber mortar. This paper employs a close-up photogrammetry technique to capture scanned images of waste rubber granules and to measure
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Development and properties of lightweight concrete based on core-shell cold-bonded lightweight aggregate using epoxy resin as interfacial enhancer J. Build. Eng. (IF 6.7) Pub Date : 2025-02-06 Zhenyu Huang, Yu Zhou, Lijie Chen
Due to the escalating shortage of construction materials and natural aggregate production, the present study aims to produce lightweight concrete (LWC) utilizing a novel artificial core-shell cold-bonded lightweight aggregate (CCLA). The newly developed CCLAs employ an expanded polystyrene (EPS) waste core encapsulated by a cementitious shell, leveraging epoxy resin as interfacial enhancer for reducing
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A review of the repair measures for reinforced concrete affected by chloride ion corrosion J. Build. Eng. (IF 6.7) Pub Date : 2025-02-06 Penglong Zhao, Zheng Si, Lingzhi Huang, Yanlan He, Xiaorui Liu, Yulong Zhang
Chloride ion corrosion significantly impacts concrete structures and will lead to the loss of structural load-bearing capacity and service life. This article starts with the corrosion mechanism of chloride on reinforced concrete and reviews and researches the repair measures of reinforced concrete affected by chloride ion corrosion. Based on the mechanism of action and operating characteristics, this
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Energy consumption prediction for office buildings: Performance evaluation and application of ensemble machine learning techniques J. Build. Eng. (IF 6.7) Pub Date : 2025-02-06 Chao Ma, Song Pan, Tong Cui, Yiqiao Liu, Ying Cui, Haoyu Wang, Taocheng Wan
Accurate forecasting and evaluation of building energy consumption are paramount for enhancing energy efficiency, reducing operational costs, and mitigating environmental impacts. Effective energy management relies on precise predictions to inform decision-making and optimize resource allocation. Although promising predictive capabilities have been demonstrated by ensemble models in this domain, their
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Seismic fragility assessment of utility tunnel and internal pipeline system Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-06 Jinqiang Li, Zilan Zhong, Kaiming Bi, Hong Hao
Probability-based seismic fragility analysis provides a quantitative evaluation of the seismic performance exhibited by structures. This study introduces a framework to perform seismic fragility analysis of utility tunnel and internal pipeline system considering wave passage effect of the ground motion spatial variation. The numerical model of a double-beam system resting on a nonlinear foundation
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Influence of bond defects on the pullout response of grouted rockbolts: Analytical study and experimental validation Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-06 Yan-Jie Wang, Hong-Bo Liu, Zhi-Min Wu, Yong-Qin Liang, Jia-Qi Yang, Meng-Di Jia
Rockbolts have been proven to be an effective and efficient technique to strengthen and retrofit rock masses in civil engineering. The stress transfer mechanism at the bolt-grout interface has been recognized as one of the key factors affecting the reinforcement effectiveness. In practice, bond defects are commonly observed at the interface owing to poor grouting or environmental deterioration during
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Bidirectional denoising method based on Fast Fourier transform analysis for TBM field penetration data Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-06 Wenkun Yang, Zuyu Chen, Haitao Zhao, Jianchun Li, Shuo Chen, Chong Shi
The dynamic interaction of rock and tunnel boring machine (TBM) in the penetration process makes a large amount of high-frequency noise in field penetration data. This noise prevents related analysis in rock-cutting processes, TBM performance prediction, and geological condition recognition. Although some endeavors provide empirical denoising threshold values, formulas, and optimization methods, fewer
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X-ray computed tomography-based characterisation of graphene nanoplatelets re-agglomeration in hardened cement composites Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-05 Zhaohua Wang, Meini Su, Yong Wang, Cise Unluer, Suning Li
Graphene Nanoplatelets (GNPs) have been found to be an effective additive for enhancing the mechanical strength of cementitious materials, attributed to the role they play as nucleation sites. However, there is not a direct correlation on the enhancing effect of graphene with increasing graphene dosage, resulting in different optimal dosages for different binders and mix designs. This study aims to
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Inherent risks identification in a contract document through automated rule generation Autom. Constr. (IF 9.6) Pub Date : 2025-02-05 Junho Kim, Baekgyu Kwon, JeeHee Lee, Duhwan Mun
Due to the limited time available during the bidding process, construction companies may fail to identify risky terms in the contract document before submission. This paper proposes a method that uses natural language processing (NLP) models, such as dependency parser and bidirectional encoder representations from transformers (BERT), to disassemble and simplify sentences in a contract document and
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Releasing the power of graph for building information discovery Autom. Constr. (IF 9.6) Pub Date : 2025-02-05 Junxiang Zhu, Nicholas Nisbet, Mengtian Yin, Ran Wei, Ioannis Brilakis
Graph is considered a promising way to managing building information. A new graph-based representation of Industry Foundation Classes (IFC) data, known as IFC-Graph, has recently been developed. However, investigation into IFC-Graph is insufficient, especially for information query. This paper aims to explore the query of graph-based building information and develop a graph query tool for IFC-Graph
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3D bridge segmentation using semi-supervised domain adaptation Autom. Constr. (IF 9.6) Pub Date : 2025-02-05 Maximilian Kellner, Timothy K?nig, Jan-Iwo J?kel, Katharina Klemt-Albert, Alexander Reiterer
Understanding the scene is crucial for automated bridge inspection. Traditionally, bridges are measured using 3D sensors that produce large point clouds. Manually interpreting the captured data is time-consuming and error-prone. This paper proposes an unsupervised and semi-supervised domain adaptation approach for 3D bridge segmentation using labeled synthetically generated data and no or limited real-world
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Automated corrosion surface quantification in steel transmission towers using UAV photogrammetry and deep convolutional neural networks Comput. Aided Civ. Infrastruct. Eng. (IF 8.5) Pub Date : 2025-02-05 Pierclaudio Savino, Fabio Graglia, Gabriele Scozza, Vincenzo Di Pietra
Corrosion in steel transmission towers poses a challenge to structural integrity and safety, requiring efficient detection methods. Traditional visual inspections are unsustainable due to the complexity and volume of structures. Their manual, qualitative, and subjective nature often leads to inconsistencies in maintenance planning. This study proposes a deep learning‐based approach for semantic segmentation
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Issue Information Comput. Aided Civ. Infrastruct. Eng. (IF 8.5) Pub Date : 2025-02-05
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Progressive collapse resistance of planar prestressed concrete frame with infill walls under corner column failure scenario J. Build. Eng. (IF 6.7) Pub Date : 2025-02-05 Tao Qu, Bin Zeng, Chang Wu, Linjie Huang, Jing Wu, Dong Chang
Infill wall is an important component of the structure. Prestressing is frequently employed in concrete structures to mitigate cracking and deformation. Frames containing both are referred to as prestressed concrete with infill walls (IW-PC) frames, which are employed extensively in civil engineering. Nevertheless, the coupling effect of prestressed tendons and infill walls on the capacity to resist
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Mechanical properties and pore structure characterization of crumb rubber concrete using equal size replacement method J. Build. Eng. (IF 6.7) Pub Date : 2025-02-05 Wenmei Zhou, Chen Lu, Zhiwei Yu, Jinxu Mo
Optimizing the method of replacing natural river sand with crumb rubber (CR) can help mitigate strength loss in crumb rubber concrete (CRC). However, the effect of replacement ratio and water to binder ratio (W/B) on CRC microstructure and strength after adopting the new replacement method has not been reported. This study investigates the effects of the W/B and the CR substitution rate on the apparent
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Replicating the sequential excavation method in tunnel model tests Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-05 Xuchao Du, Yao Li, Xing Dong, Zhanglong Guo, Houxian Chen
To investigate soil deformation and stress distribution during tunnel excavation, a series of model tests were conducted at varying buried depths. These tests replicated the three-bench excavation method employed in the Luochuan Tunnel, utilizing prefabricated initial support segments connected by 3D-printed sliding connectors to achieve rapid sequential excavations and support installations. The results
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Heating-induced transformations in calcium silicate hydrate (C-S-H): In-situ investigations of composition, structure, and morphology Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-04 Yuefeng Ma, Ming Jin, Fei Wang, Diederik Jacques, Xuyan Shen, Jian Zhang, Chang Gao, Haoyu Zeng, Jingwen Liu, Jiaping Liu
Transformation of C-S-H is crucial in the deterioration of concrete at high temperatures. This study investigates the composition, structure, and morphology of C-S-H from 30?°C to 1000?°C using in-situ heating XRD, TGA/TG-IR, in-situ heating XPS, and in-situ heating TEM combined with image recognition. The results reveal that during heating, C-S-H undergoes weakly and strongly bound water loss, dehydroxylation
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Innovative ZIF-8 modified ER@EC microcapsules: Enhancing slow-release and longevity for superior self-healing in cementitious materials Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-04 Shiyu Zhang, Zijian Song, Haoliang Zhang, Zilang Huang, Hui Rong, Linhua Jiang, Yunsheng Zhang
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A novel electromigration-based microbial self-healing strategy for existing concrete structures Cement Concrete Comp. (IF 10.8) Pub Date : 2025-02-04 Zhenxiao Bi, Jing Xu, Hao Sun, Qing Chen, Hehua Zhu
The prevailing self-healing of concrete cracks based on microbial-induced carbonate precipitation (MICP) has been limited to new structures since healing agents have to be pre-embedded during fresh mixing stage. In this study, a novel microbial self-healing strategy based on electromigration of bacterial spores is proposed for existing concrete. To this end, the feasibility of this new method is first
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Machine learning method for As-Is tunnel information model reconstruction Autom. Constr. (IF 9.6) Pub Date : 2025-02-04 Nicola Rimella, Lorenzo Rimella, Anna Osello
The maintenance of aging infrastructure requires advanced tools for efficient inspection and planning. This paper presents a methodology for segmenting and classifying point clouds of road tunnels to streamline maintenance operations. Processing large datasets, such as those generated by laser surveys, poses significant challenges without appropriate IT solutions. Data from four Italian tunnels were
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Intelligent co-design of shear wall and beam layouts using a graph neural network Autom. Constr. (IF 9.6) Pub Date : 2025-02-04 Jikang Xia, Wenjie Liao, Bo Han, Shulu Zhang, Xinzheng Lu
Generative artificial intelligence-driven design of shear wall structures is crucial for the intelligent design of buildings, but current methods arrange shear walls and then beams successively, overlooking their interdependence. This paper constructed a graph representation of the coupled potential positions for shear walls and beams and proposed a co-design method driven by a graph neural network
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The expressway network design problem for multiple urban subregions based on the macroscopic fundamental diagram Comput. Aided Civ. Infrastruct. Eng. (IF 8.5) Pub Date : 2025-02-04 Yunran Di, Weihua Zhang, Haotian Shi, Heng Ding, Jinbiao Huo, Bin Ran
With the advancement of urbanization, cities are constructing expressways to meet complex travel demands. However, traditional link‐based road network design methods face challenges in addressing large‐scale expressway network design problems. This study proposes an expressway network design method tailored for multi‐subregion road networks. The method employs the macroscopic fundamental diagram to
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Recycled filtered contaminants from liquid-fed pyrolysis as novel building composite material J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Alessia Romani, Daniel Kulas, Joseph Curro, David R. Shonnard, Joshua M. Pearce
Liquid-fed pyrolysis allows the conversion of contaminated postconsumer plastic waste into valuable resources, removing contaminants through wax dissolution and filtration. One of the main challenges is currently represented by the management of its main byproduct, the contaminant-rich retentate from the filtration process. New circular economy strategies are needed to use this waste plastic-based
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Synergistic effect of micro and nano cellulosic fillers on thermal insulation and mechanical strength properties of compressed earth bricks from phosphate mining by-products J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Khaoula Mouih, Rachid Hakkou, Mohammed Mansori, Jaafar Ghanbaja, Yassine Taha, Hamid Kaddami
The present research explores the feasibility of reusing phosphate mining waste rocks in the production of sustainable, and eco-friendly compressed earth bricks (CEBs). The study focuses on evaluating the combined impact of incorporation of date palm fibers (DPF) and commercial cellulose nanocrystals (CNCs) on the physical, mechanical, and thermal properties of CEBs, opening up prospects for potential
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Experimental study of innovative steel beam-to-column joint under impact loading to mitigate progressive collapse J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Damian Kukla, Aleksander Koz?owski, Bartosz Miller, Dominika Ziaja, Izabela Wójcik-Grz?ba, Sylwia Gubernat
The structural response of two steel substructures in a beam-column-beam arrangement under accidental loads was studied in the experimental impact tests. Both versions of the bolted joint, the classic flush end-plate and the innovative one were tested with the same impact energy level applied by dropping the free-falling steel-concrete package. Special measuring equipment dedicated to dynamic investigations
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A study on the mechanical properties of eco-friendly low-cost polyethylene fiber-reinforced engineered cementitious composites J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Mingzheng Zhu, Mingzhe Zhang, Xiangrui Meng, Bing Chen, Lei Lang
For several decades, there has been a growing concern about sustainability in the construction industry. The excellent mechanical properties of engineered cementitious composite (ECC) make it an important building material that improves the durability, crack resistance and overall performance of structures. However, the high cost and environmental impact issues associated with conventional ECC limit
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Evaluating salt-freeze damage in concrete and mortar: Interfacial transition zone vulnerability and non-destructive estimation of mechanical degradation J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Yi Wang, Xunjie Zhang, Sha Xie, Zhang Li, Jiaxu Yao
This study investigated the degradation mechanisms of concrete and mortar exposed to sodium chloride attack and freeze-thaw cycles. A comprehensive experimental program has been conducted, including mechanical testing (flexural, splitting, and compressive strength), chloride penetration analysis, and mercury intrusion porosimetry (MIP) tests to examine pore structure changes. The results demonstrated
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Hydrothermal synthesis of C–S–H/cellulose nanocomposites and its enhancement effect on the mechanical performance of cement-based materials J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Hong Zhou, Shuzhen Zheng, Huina Li, Qianping Ran, Jianfeng Ma
Calcium silicate hydrates (C–S–H) is the primary product of cement hydration, and its structure and properties substantially influence the mechanical performance of cement-based materials. However, in practical applications, pure C–S–H has some shortcomings, such as susceptibility to microcracking and high porosity, which can reduce the durability and overall mechanical performance. To solve these
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Seismic damage recognition of structural and non-structural components based on convolutional neural networks J. Build. Eng. (IF 6.7) Pub Date : 2025-02-04 Weiping Wen, Tingfei Xu, Jie Hu, Duofa Ji, Yanan Yue, Changhai Zhai
Image-based rapid recognition of seismic damage of structural and non-structural components is significant for the emergency response and recovery decision making in the post-earthquake environment. A novel seismic damage rapid recognition method of structural and non-structural components based on convolutional neural networks (CNNs) is proposed in this study. Firstly, a seismic damage image dataset
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Numerical and experimental investigation into dynamic fracture and energy dissipation of red sandstone under multi-axial confining pressure Tunn. Undergr. Space Technol. (IF 6.7) Pub Date : 2025-02-04 Jianhua Yang, Tao Yu, Zhiwei Ye, Yi Zou, Chuangbing Zhou
Investigating the dynamic behavior of rock under confining pressure is instrumental in enhancing the understanding of rock fracture characteristics and energy efficiency of deep rock blasting. Related investigations have been conducted extensively by using modified Split Hopkinson Pressure Bar (SHPB) apparatus. However, in these experimental tests, the real-time observation of the dynamic fracture
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Numerical investigation of mechanisms affecting alkali-silica reaction advancement by reactive transport simulations Cem. Concr. Res. (IF 10.9) Pub Date : 2025-02-03 Lucie Gomez, Frédéric Perales, Stéphane Multon, Adrien Socié, Benoit Fournier, Matthieu Argouges
Alkali-Silica Reaction (ASR) is a long-term chemical degradation induced in concrete by the difference in pH between the aggregate and the cement paste. ASR advancement is thus driven by the combination of the ionic species diffusion and the dissolution of reactive silica. In this paper, the reactive transport model is based on the principal sequence of the ASR-mechanisms: hydroxide, alkali and calcium