Journal of building engineering最新文献_第10页

Gene-modified acoustic metamaterials for improving the low-frequency broadband noise reduction performance of sound barriers for transportation buildings 改善交通建筑隔音屏障低频宽带降噪性能的基因修饰声学超材料

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113090

Xinhao Zhang , Caiyou Zhao , Duojia Shi , Pengzhan Liu , Tao Lu , Rong Chen , Ping Wang

{"title":"Gene-modified acoustic metamaterials for improving the low-frequency broadband noise reduction performance of sound barriers for transportation buildings","authors":"Xinhao Zhang , Caiyou Zhao , Duojia Shi , Pengzhan Liu , Tao Lu , Rong Chen , Ping Wang","doi":"10.1016/j.jobe.2025.113090","DOIUrl":"10.1016/j.jobe.2025.113090","url":null,"abstract":"<div><div>To improve the noise reduction capability of sound barriers for existing transportation buildings, a gene-modified acoustic metamaterial is proposed for noise reduction into the sound barriers. Simulation results show that the sound absorption coefficient of metamaterials sound barrier (MSB) is more than 0.85 in the range of 800Hz-8kHz, experiencing significant improvement across both low and medium acoustic frequency ranges compared with the existing sound barriers., wherein it is found that the impedance-matching effect is the key to achieving near-perfect sound absorption. The simulation results of sound absorption coefficient and sound transmission loss match well with experiments, where it is found that the sound insulation performance can reach higher than 30.0 dB at frequencies above 200 Hz from the sound transmission loss curves. Experiments demonstrate that the installation of metamaterial sound barriers (MSBs) can reduce ambient traffic noise by 7.3 dB. This research is expected to bring new technical support for reducing urban traffic noise and improving the indoor living environment.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113090"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242767","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}

引用次数: 0

High-temperature pullout behavior of a bond-type anchorage system for CFRP strand tendon CFRP筋粘结型锚固体系的高温拉拔性能

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113102

Zerun Li , Zhi Fang , Zhengwen Jiang , Yawei Fang , Liangwei Zhang , Zhiwei Wang

{"title":"High-temperature pullout behavior of a bond-type anchorage system for CFRP strand tendon","authors":"Zerun Li , Zhi Fang , Zhengwen Jiang , Yawei Fang , Liangwei Zhang , Zhiwei Wang","doi":"10.1016/j.jobe.2025.113102","DOIUrl":"10.1016/j.jobe.2025.113102","url":null,"abstract":"<div><div>The bonding performance of sand-coated CFRP (carbon fiber reinforced polymer) strand tendon-UHPC (ultra-high performance concrete) interface under elevated temperature ranging of 25∼210 °C was experimentally investigated in the present study. Effects of target temperature, bond length and anchoring method on the bonding performance of CFRP strand tendon-UHPC interface were identified and quantified. The difference between high-temperature bond-slip behaviors of sand-coated CFRP strand tendon-UHPC and ribbed CFRP tendon-UHPC interfaces was also uncovered. Theoretical models were developed for determining average bond strength of CFRP tendon-UHPC interface and critical bond length of CFRP strand tendon under high temperature. The obtained results indicated that debonding of sand coating layer from core region of tendon was the dominant failure mode for all test bond-type anchorage systems. The average bond strength of CFRP strand tendon-UHPC interface significantly decreased by 82.4–94 % under glass transition temperature <em>T</em><sub>g</sub> of tendon (210 °C). The bearing capacity of the bond-type anchorage system for CFRP strand tendon under temperature below 100 °C can be greatly improved by applying the dispersion anchoring method, while the benefit diminished as temperature increased to 210 °C. The sand coated CFRP strand tendon-UHPC interface has lower average bond strength than the ribbed CFRP tendon-UHPC interface under both ambient and high temperatures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113102"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306687","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}

引用次数: 0

Multi-scale fabrication and challenges in 3D printing of special -shaped concrete structures 特殊形状混凝土结构3D打印的多尺度制造与挑战

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113134

Wenyu Lin , Li Wang , Zhijian Li , Gang Bai , Qiang Wang , Yao Qu

{"title":"Multi-scale fabrication and challenges in 3D printing of special -shaped concrete structures","authors":"Wenyu Lin , Li Wang , Zhijian Li , Gang Bai , Qiang Wang , Yao Qu","doi":"10.1016/j.jobe.2025.113134","DOIUrl":"10.1016/j.jobe.2025.113134","url":null,"abstract":"<div><div>3D-printed concrete (3DPC) has demonstrated substantial potential for fabricating geometrically complex structures through its inherent capabilities of parametric design flexibility and formwork-free construction. This review systematically examines the critical triad of structural design, material property control, and deposition technologies essential for 3DPC of non-standard geometries. In structural design, the synergistic integration of biomimetic principles with topology optimization enables lightweight configurations while maintaining material efficiency. For material properties, precisely controlled chemical coagulation and physical flocculation processes effectively mitigate strength deficiency and deformation challenges during rapid concrete deposition. Regarding deposition technologies, the implementation of modular printing strategies, auxiliary support systems, and injection 3D-printed concrete methods demonstrates measurable improvements in both structural integrity and manufacturing efficiency. Although challenges persist in large-scale applications, continuous advancements in automated process control and material innovation suggest transformative potential for architectural engineering applications.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113134"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242849","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}

引用次数: 0

Influence of Portland cement and sewage sludge ash additions on metakaolin-based geopolymers 硅酸盐水泥和污水污泥灰分掺量对偏高岭土聚合物的影响

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113103

Danilo Bordan Istuque , Lourdes Soriano , Maria Victoria Borrachero , Rodrigo Garozi da Silva , Jorge Luís Akasaki , Jordi Payá , Mauro Mitsuuchi Tashima

{"title":"Influence of Portland cement and sewage sludge ash additions on metakaolin-based geopolymers","authors":"Danilo Bordan Istuque , Lourdes Soriano , Maria Victoria Borrachero , Rodrigo Garozi da Silva , Jorge Luís Akasaki , Jordi Payá , Mauro Mitsuuchi Tashima","doi":"10.1016/j.jobe.2025.113103","DOIUrl":"10.1016/j.jobe.2025.113103","url":null,"abstract":"<div><div>This study evaluates the impact of Portland cement (PC) and sewage sludge ash (SSA) on zeolite formation in metakaolin (MK)-based geopolymer mortars. Various parameters, including NaOH concentration and PC/SSA content, were analyzed. The mortars were cured in a thermal bath at 65 °C and evaluated using compressive strength testing, thermogravimetry (TG/DTG), X-ray diffraction (XRD), and scanning electron microscopy (FESEM-EDX). The results emphasize the crucial role of NaOH concentration in zeolite formation. Mortars with 8 mol kg<sup>−1</sup> NaOH exhibited slower crystallization, leading to greater strength stability. Specimens containing 10 % PC maintained their strength over 56 days, reaching 47.2 MPa. While SSA initially reduced compressive strength, it improved long-term performance. After 56 days, mortars with 9.5 % and 19 % SSA outperformed SSA-free mixes, which stabilized at 24.3 MPa, maintaining strengths of 42.5 MPa and 33.7 MPa, respectively. These findings highlight the synergistic effect of incorporating PC and SSA into MK-based geopolymer mortars, particularly for longer curing periods. Physicochemical analyses revealed that the primary binding phase, N-A-S-H, gradually transformed into zeolite Na-P1, causing strength degradation. However, the presence of calcium (from PC), iron, and sulfur (from SSA) altered the geopolymer matrix into N-(C, F, <span><math><mrow><mover><mi>S</mi><mo>‾</mo></mover></mrow></math></span>)-A-S-H, effectively delaying zeolite formation. This study demonstrates the complex interaction between PC, SSA, and zeolite formation in geopolymer mortars. By adjusting these components, it presents a viable approach to enhancing the durability and mechanical performance of MK-based geopolymers.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113103"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261650","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}

引用次数: 0

Seismic interaction between liquefiable soil and typical RC frame clusters under code-specified seismic loadings 在规范规定的地震荷载下，可液化土和典型RC框架簇之间的地震相互作用

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113088

Jishuai Wang , Tong Guo , Jing Qian , Shuqi Yu , Jie Liu

{"title":"Seismic interaction between liquefiable soil and typical RC frame clusters under code-specified seismic loadings","authors":"Jishuai Wang , Tong Guo , Jing Qian , Shuqi Yu , Jie Liu","doi":"10.1016/j.jobe.2025.113088","DOIUrl":"10.1016/j.jobe.2025.113088","url":null,"abstract":"<div><div>Seismic structure-soil-structure interaction (SSSI) has attracted considerable attention due to its vital role in the development of seismic design methods that consider the influence of adjacent buildings. However, existing SSSI studies lack consideration of soil liquefaction, failing to provide effective guidance for the design and assessment of building clusters on liquefiable soil. Based on a nonlinear finite element method validated against a shaking table test for SSSI, this study investigates the SSSI in clusters of typical low-rise, multi-story, and high-rise reinforced concrete (RC) frames built on liquefiable sand soil under code-specified earthquakes. The effects of SSSI on the maximum story drift and base shear response, and post-earthquake tilt degrees of RC frames are investigated in the context of considering the uncertainties of both RC frames and earthquake loadings. Results indicate that SSSI generally reduces maximum story drifts but increases maximum base shears in RC frames on liquefiable soil, with these effects intensifying in looser soils and under higher seismic intensities. Moreover, SSSI markedly amplifies post-earthquake tilt degrees of edge structures within a cluster. Soil liquefaction significantly increases the post-earthquake tilt degrees of edge structures within structure clusters on loose sand soil, with the maximum tilt increase exceeding tenfold under the maximum considered earthquake. Neglecting soil liquefaction generally leads to an underestimation of the maximum base shear for RC frames considering SSSI. The adverse effects of SSSI and soil liquefaction on the structure clusters built on saturated loose or medium sand soils can be mitigated or eliminated by increasing the anti-overturning abilities of their edge structures and the design seismic forces of all structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113088"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253919","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}

引用次数: 0

Comprehensive review of jet and wall boundary condition impacts on anteroom smoke containment: A building fire safety perspective 射流和墙体边界条件对前厅防烟影响的综合评价：从建筑消防安全的角度

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-06 DOI: 10.1016/j.jobe.2025.113062

Qihou Zhang , Sicheng Li , Ying Chen , Jialing Liu

{"title":"Comprehensive review of jet and wall boundary condition impacts on anteroom smoke containment: A building fire safety perspective","authors":"Qihou Zhang , Sicheng Li , Ying Chen , Jialing Liu","doi":"10.1016/j.jobe.2025.113062","DOIUrl":"10.1016/j.jobe.2025.113062","url":null,"abstract":"<div><div>In building fire safety engineering, mechanically pressurized air supply systems have become a critical solution for smoke prevention due to their stability and adaptability compared to natural ventilation, particularly in anterooms and stairwells. This study systematically investigates the operational mechanisms of such systems by addressing three critical knowledge gaps: (1) the effect of wall boundary conditions on the effectiveness of smoke protection in anteroom is inadequate, (2) limited understanding of confined space flow dynamics, and (3) no study has analyzed the importance of jet boundary conditions versus wall boundary conditions on the effectiveness of smoke protection in anterooms. By combining orthogonal experimental design and Computational Fluid Dynamics (CFD) simulations, we have further clarified that wall boundary conditions have a large impact on the effectiveness of smoke protection in anterooms, and therefore lay the foundation for further research in later stages. The main results of the study showed that the three indicators of temperature, co concentration and heat release rate were judged by orthogonal tests, and it was found that the co concentration did not exceed 600 ppm in most of the working conditions, so it was considered to be a secondary indicator, and it was found that the polarity of the air supply outlet size was 0.304, which had the greatest influence, followed by the length of the anteroom, which had a polarity of 0.249. The main innovation of this study is to further clarify the wall boundary conditions on the effectiveness of smoke protection in the anteroom is there is a greater impact on the follow-up still need to expand this aspect of the study, and a review of previous research in this area, explaining the limitations of the previous research and summarise the previous research methodology, laying the groundwork for the subsequent study.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113062"},"PeriodicalIF":6.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242852","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}

引用次数: 0

Comparative studies on blast resistance of precast concrete composite and cast-in-place slabs 预制混凝土组合板与现浇板抗爆性能比较研究

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-05 DOI: 10.1016/j.jobe.2025.113077

G.Q. Chen, H. Wu, Y.H. Cheng, J.X. Lu

{"title":"Comparative studies on blast resistance of precast concrete composite and cast-in-place slabs","authors":"G.Q. Chen, H. Wu, Y.H. Cheng, J.X. Lu","doi":"10.1016/j.jobe.2025.113077","DOIUrl":"10.1016/j.jobe.2025.113077","url":null,"abstract":"<div><div>Precast concrete composite (PCC) slabs with truss rebars have been widely applied in modern civil engineering attributed to their advantages over traditional cast-in-place reinforced concrete (RC) slabs in constructional industrialization and environmental protection. With the increasing aggravations of blast-induced catastrophic incidents, there is a lack of understanding on the blast resistance of PCC slabs. This study aims to perform a comprehensive evaluation on the dynamic behaviors of both PCC and RC slabs against blast loadings. Firstly, by designing a blast loading test apparatus, the field explosion test was conducted on six PCC and RC slabs with three identical scaled distances of TNT explosive. The incident and reflected overpressures-time histories, as well as damage patterns and deflection-time histories of slabs were recorded. Secondly, by adopting the Multi-Material Arbitrary Lagrangian-Eulerian and Fluid-Structure Interaction algorithms, a finite element analysis approach was proposed and fully validated by comparison to the overpressures of blast wave, deflections and failure modes of slabs in both the present and existing explosion tests. Finally, the prototype PCC and RC slabs in frame building structures were designed, and the corresponding blast resistance against three typical design-based threats of explosion specified by the U.S. Federal Emergency Management Agency was examined. It indicates that, under the near-range explosion of briefcase bomb (23 kg TNT), the maximum deflection at the 1/4 span of the prototype PCC slab is 36 % less than that of the RC slab. Considering the superior blast resistance of PCC slabs, the traditional RC slabs could be replaced by PCC slabs for the prefabricated blast-resistant buildings.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"110 ","pages":"Article 113077"},"PeriodicalIF":6.7,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242354","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}

引用次数: 0

Molecular insights into enhancing bonding and erosion resistance in recycled aggregate concrete ITZ through carbonation 通过碳化提高再生骨料混凝土ITZ粘结性和抗侵蚀性的分子见解

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-05 DOI: 10.1016/j.jobe.2025.113125

Qingyin Tang, Haoran Guo, Heping Zheng, Dongshuai Hou, Muhan Wang, Yue Zhang, Zhenxing Du, Pan Wang

{"title":"Molecular insights into enhancing bonding and erosion resistance in recycled aggregate concrete ITZ through carbonation","authors":"Qingyin Tang, Haoran Guo, Heping Zheng, Dongshuai Hou, Muhan Wang, Yue Zhang, Zhenxing Du, Pan Wang","doi":"10.1016/j.jobe.2025.113125","DOIUrl":"10.1016/j.jobe.2025.113125","url":null,"abstract":"<div><div>In engineering practice, using carbonation treatment technology can enhance the strength of recycled aggregate concrete (RAC). However, due to experimental constraints, the specific mechanism by which carbonation treatment improves the bonding and erosion resistance of RAC remains unclear. Therefore, this study employs molecular simulation methods to investigate in detail the mechanical behavior and microstructure of the interfacial transition zone (ITZ) in RAC before and after carbonation treatment, as well as the relationship between its microstructure and erosion resistance in corrosive environments. The results demonstrate that after carbonation treatment, the tensile strength of the ITZ at the nanoscale increases by more than 75 %, while the shear strength improves by over 298 %. Carbonation treatment significantly alters the bonding structure of the ITZ, increasing the number of ionic bonds and the coordination number at the interface by more than 870 % and 71 %, respectively, thereby markedly enhancing interfacial bonding performance. In erosive environments, the carbonated ITZ exhibits greater microstructural stability, with the erosion solution in nanopores unable to leach ions from the matrix (zero leaching), thus improving the erosion resistance of the ITZ. Additionally, these microstructural changes influence the distribution of ions in the nanopore solution, ensuring that the bonding performance of the ITZ remains unaffected by the erosive environment. This study elucidates the micro-mechanisms underlying the improvement of RAC performance through carbonation treatment, providing important theoretical foundations and data support for the broader engineering application of RAC.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"110 ","pages":"Article 113125"},"PeriodicalIF":6.7,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144231109","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}

引用次数: 0

Subsurface defect area quantification of reinforced concrete structures with array ultrasound and dual-scale neural network 基于阵列超声和双尺度神经网络的钢筋混凝土结构亚表面缺陷面积量化

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-05 DOI: 10.1016/j.jobe.2025.113130

Jiangpeng Shu , Sihan Li , Han Yang , Hongchuan Yu , Shengliang Xu , Wuhua Zeng , Jinglin Xu

{"title":"Subsurface defect area quantification of reinforced concrete structures with array ultrasound and dual-scale neural network","authors":"Jiangpeng Shu , Sihan Li , Han Yang , Hongchuan Yu , Shengliang Xu , Wuhua Zeng , Jinglin Xu","doi":"10.1016/j.jobe.2025.113130","DOIUrl":"10.1016/j.jobe.2025.113130","url":null,"abstract":"<div><div>Array ultrasound is effective in detecting subsurface defects of reinforced concrete (RC) structures. However, the current practice of ultrasonic image interpretation remains manual and qualitative, restricting the automatic and intelligent subsurface defect quantification. This study proposes a subsurface defect area quantification method for RC structures with array ultrasound and dual-scale high-resolution neural network., Parallel high-resolution convolution streams and multi-resolution fusions were developed in the high-resolution network to generate spatially precise and semantically strong representations of defects. Dual-scale architecture was proposed based on the high-resolution network, taking advantage of global-scale context to assist local-scale network, and expecting to improve inference accuracy. RC specimens with multiple types preset artificial defects were designed and manufactured. C-scan images were acquired using total focus imaging method and low-frequency ultrasonic array and employed to train the dual-scale network. Individual plane maps output by dual-scale network were registered to global plane representation maps, and defect areas were quantified. Results reported that different types of defects can be distinguished from other high-intensity reflections in C-scans by the proposed deep learning model. Mean F-score and IoU of testing set were 88.50 % and 80.05 % respectively, and defect F-score and IoU were 86.24 % and 75.81 % respectively, all higher than the local-scale high-resolution network, demonstrating the superiority of dual-scale architecture. MAPE and R<sup>2</sup> of defect area quantification were 6.07 % and 0.9779, indicating the proposed method facilitates subsurface defect quantification to mm-level with high precision.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113130"},"PeriodicalIF":6.7,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242769","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}

引用次数: 0

Development of eco-friendly brick waste-based geopolymers: effect of calcium incorporation on rheology, compressive strength, microstructure, and eco-efficiency 环保砖废土聚合物的开发：钙掺入对流变性、抗压强度、微观结构和生态效率的影响

IF 6.7 2区工程技术

Journal of building engineering Pub Date : 2025-06-04 DOI: 10.1016/j.jobe.2025.113101

Allan G. Borçato , Juliana M. Casali , Andrea M. Betioli , Ronaldo A. Medeiros-Junior

{"title":"Development of eco-friendly brick waste-based geopolymers: effect of calcium incorporation on rheology, compressive strength, microstructure, and eco-efficiency","authors":"Allan G. Borçato , Juliana M. Casali , Andrea M. Betioli , Ronaldo A. Medeiros-Junior","doi":"10.1016/j.jobe.2025.113101","DOIUrl":"10.1016/j.jobe.2025.113101","url":null,"abstract":"<div><div>This study investigated the development of geopolymers from low-reactivity residual precursors for the development of eco-efficient geopolymers. Brick waste (BW) was used as the sole precursor. Calcium hydroxide (CH) was used to enhance the properties of the geopolymers. Semi-adiabatic calorimetry and rheological tests evaluated the fresh state. Compressive strength, water absorption, and void index tests evaluated the mechanical properties. XRD, SEM, and EDS analyses investigated the microstructure. Embodied energy and carbon emissions were used to analyze the sustainability of the geopolymers. The results showed that the incorporation of high levels of CH increased the yield stress, plastic viscosity, and thixotropy. Conversely, the incorporation of CH was essential to improve compressive strength. The increase in compressive strength varied between 61.1 % and 126.2 % at 28 days due to the incorporation of CH. Microstructural analyses indicated that the C-A-S-H gel promoted an increase in compressive strength. Semi-adiabatic calorimetry showed that CH incorporation accelerated the geopolymerization reactions. Compressive strength was limited by the zeolite formation observed in the 20 % CH mixture. The sustainability analysis showed that the mixtures with 10 % and 15 % CH produced higher eco-efficiency and better results in terms of rheological and compressive strength, respectively. In conclusion, this study showed that geopolymers can be produced from low-reactivity waste materials, contributing to the development of sustainable construction materials.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"111 ","pages":"Article 113101"},"PeriodicalIF":6.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242854","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}

引用次数: 0