Cement and Concrete Research最新文献

3D microstructural generation from 2D images of cement paste using generative adversarial networks 利用生成式对抗网络从水泥浆二维图像生成三维微观结构

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-11-16 DOI: 10.1016/j.cemconres.2024.107726

Xin Zhao , Lin Wang , Qinfei Li , Heng Chen , Shuangrong Liu , Pengkun Hou , Jiayuan Ye , Yan Pei , Xu Wu , Jianfeng Yuan , Haozhong Gao , Bo Yang

{"title":"3D microstructural generation from 2D images of cement paste using generative adversarial networks","authors":"Xin Zhao , Lin Wang , Qinfei Li , Heng Chen , Shuangrong Liu , Pengkun Hou , Jiayuan Ye , Yan Pei , Xu Wu , Jianfeng Yuan , Haozhong Gao , Bo Yang","doi":"10.1016/j.cemconres.2024.107726","DOIUrl":"10.1016/j.cemconres.2024.107726","url":null,"abstract":"<div><div>Establishing a realistic three-dimensional (3D) microstructure is a crucial step for studying microstructure development of hardened cement pastes. However, acquiring 3D microstructural images for cement often involves high costs and quality compromises. This paper proposes a generative adversarial networks-based method for generating 3D microstructures from a single two-dimensional (2D) image, capable of producing high-quality and realistic 3D images at low cost. In the method, a framework (CEM3DMG) is designed to synthesize 3D images by learning microstructural information from a 2D cross-sectional image. Experimental results show that CEM3DMG can generate realistic 3D images of large size. Visual observation confirms that the generated 3D images exhibit similar microstructural features to the 2D images, including similar pore distribution and particle morphology. Furthermore, quantitative analysis reveals that reconstructed 3D microstructures closely match the real 2D microstructure in terms of gray level histogram, phase proportions, and pore size distribution.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"187 ","pages":"Article 107726"},"PeriodicalIF":10.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142642665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Unveiling the key factors for clinker reactivity and cement performance: A physic-chemical and performance investigation of 40 industrial clinkers 揭示熟料反应性和水泥性能的关键因素：40 种工业熟料的物理化学和性能调查

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-11-14 DOI: 10.1016/j.cemconres.2024.107717

J.S. Andrade Neto , I.C. Carvalho , P.J.M. Monteiro , P.R. de Matos , A.P. Kirchheim

{"title":"Unveiling the key factors for clinker reactivity and cement performance: A physic-chemical and performance investigation of 40 industrial clinkers","authors":"J.S. Andrade Neto , I.C. Carvalho , P.J.M. Monteiro , P.R. de Matos , A.P. Kirchheim","doi":"10.1016/j.cemconres.2024.107717","DOIUrl":"10.1016/j.cemconres.2024.107717","url":null,"abstract":"<div><div>This study assessed 40 industrial clinkers from 16 cement plants, determining their physical, chemical, and mineralogical properties and the corresponding cements' strength development and hydration kinetics. Pearson's statistical analysis identified key factors influencing clinker and cement properties. Clinker composition ranged within 56.5–73.9% C₃S, 4.1–24.5% C₂S, 0.8–8.4% C₃A, and 7.4–13.9% C₄AF. The sulfate-alkali ratio significantly impacted C₃A content and polymorphism. Alite crystal size was directly influenced by the CaO content and the sulfate-alkali ratio and inversely by the MgO, K₂O, and F<sup>−</sup> contents. Clinker grindability was directly affected by the C₃S crystal size and the sulfate-alkali ratio while inversely impacted by the MgO and K₂O contents. Key parameters for early cement hydration included fineness and K₂O content (positive) and C₃S crystal size (negative); larger C<sub>3</sub>S crystal size negatively affected cement early strength, while MnO<sub>2</sub> and K<sub>2</sub>O presence improved 1-day strength. For 28-day strength, increasing cement fineness and K<sub>2</sub>O content were detrimental.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"187 ","pages":"Article 107717"},"PeriodicalIF":10.9,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

3D crystalline phase and pore structure evolution upon CO2 exposure in sodium sulfate-activated cement pastes 硫酸钠活化水泥浆暴露于二氧化碳时的三维晶相和孔隙结构演变

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-11-11 DOI: 10.1016/j.cemconres.2024.107716

Zengliang Yue , Zixian Su , Partha P. Paul , Alastair T.M. Marsh , Alice Macente , Marco Di Michiel , John L. Provis , Philip J. Withers , Susan A. Bernal

{"title":"3D crystalline phase and pore structure evolution upon CO2 exposure in sodium sulfate-activated cement pastes","authors":"Zengliang Yue , Zixian Su , Partha P. Paul , Alastair T.M. Marsh , Alice Macente , Marco Di Michiel , John L. Provis , Philip J. Withers , Susan A. Bernal","doi":"10.1016/j.cemconres.2024.107716","DOIUrl":"10.1016/j.cemconres.2024.107716","url":null,"abstract":"<div><div>The effects of CO<sub>2</sub> exposure on sodium sulfate-activated blast furnace slag cement paste have been characterised by X-ray (attenuation) computed tomography revealing changes in micron-scale pore structure, and X-ray diffraction computed tomography (XRD-CT) elucidating changes in the spatial distribution of crystalline and semi-crystalline phases. Accelerated carbonation reduced ettringite volumes and induced formation of hydrotalcite, demonstrating the critical role of Mg-Al-SO<sub>4</sub>-layered double hydroxide phases in the CO<sub>2</sub> uptake of these cements. These changes yield a refinement of small pores and increase the overall porosity, reaching values comparable to those of blended Portland cements. Formation factor values were determined considering the pore solution electrical resistivity, calculated from thermodynamic modelling, and the porosity. A correlation between simulated tortuosity and porosity is proposed to estimate the diffusion tortuosity and formation factor of sodium sulfate-activated slag pastes. This approach represents a significant step forward for assessing carbonation resistance and CO<sub>2</sub> uptake capacity of cementitious pastes.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"187 ","pages":"Article 107716"},"PeriodicalIF":10.9,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Degradation of alkali-activated Fe-rich slag in acetic acid 碱活性富铁炉渣在醋酸中的降解

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-11-09 DOI: 10.1016/j.cemconres.2024.107715

Nana Wen , Ziyou Yu , Vincent Hallet , Arne Peys , Dimitrios Sakellariou , Yiannis Pontikes

引用次数: 0

Reactive transport modeling of acetic acid-induced degradation in portland cement paste 波特兰水泥浆中醋酸诱导降解的反应迁移模型

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-11-08 DOI: 10.1016/j.cemconres.2024.107704

Maximilian Löher , Neven Ukrainczyk , Andreas Bogner , Astrid Hirsch , Frank Dehn , Eduardus Koenders

{"title":"Reactive transport modeling of acetic acid-induced degradation in portland cement paste","authors":"Maximilian Löher , Neven Ukrainczyk , Andreas Bogner , Astrid Hirsch , Frank Dehn , Eduardus Koenders","doi":"10.1016/j.cemconres.2024.107704","DOIUrl":"10.1016/j.cemconres.2024.107704","url":null,"abstract":"<div><div>A reactive transport model was employed to investigate the influence of multiple hydrate phases during acetic acid attack on Portland cement paste. The simulation accounted for the dissolution of primary cement hydrates like Ettringite, Portlandite and C-S-H, along with the formation of silica gel products impacting diffusivity. The simulations primarily utilized independent material parameters, though the effective specific surface area of C-S-H phases required adjustment, indicating that only a small fraction is active in bulk paste compared to experimental values obtained from powders. Experiments involved exposing hardened cement paste samples to acetic acid (pH = 3) for durations ranging from 35 to 84 days. The model predicted changes in mineral assemblages, porosity, and pore solution chemistry versus degradation depth and time. Comparison of calculated Ca and Si-contents with experimentally obtained values from <span><math><mi>μ</mi></math></span>XRF analysis demonstrated good agreement of within 6% error, highlighting the importance of considering multiple minerals.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"187 ","pages":"Article 107704"},"PeriodicalIF":10.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Cement and Concrete Research Le Chatelier Awards 水泥与混凝土研究勒沙特里耶奖

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2024-10-12 DOI: 10.1016/j.cemconres.2024.107689

Robert J. Flatt

引用次数: 0

Predictors of somatic symptom burden in healthcare professionals during the COVID-19 pandemic: an 8-week follow-up study. COVID-19大流行期间卫生保健专业人员躯体症状负担的预测因素:一项为期8周的随访研究

IF 3.3 1区工程技术

Cement and Concrete Research Pub Date : 2023-12-01 Epub Date: 2022-05-13 DOI: 10.1080/09638237.2022.2069709

Petra Engelmann, Anne Toussaint, Marylyn M Addo, Thomas Theo Brehm, Ansgar W Lohse, Angelika Weigel, Michelle Thompson, Bernd Löwe

{"title":"Predictors of somatic symptom burden in healthcare professionals during the COVID-19 pandemic: an 8-week follow-up study.","authors":"Petra Engelmann, Anne Toussaint, Marylyn M Addo, Thomas Theo Brehm, Ansgar W Lohse, Angelika Weigel, Michelle Thompson, Bernd Löwe","doi":"10.1080/09638237.2022.2069709","DOIUrl":"10.1080/09638237.2022.2069709","url":null,"abstract":"<p><strong>Background: </strong>Literature investigating the impact of COVID-19 on healthcare professionals barely addresses predictors of somatic symptom burden during the COVID-19 pandemic.</p><p><strong>Aims: </strong>As biopsychosocial models propose that not only the disease but also sociodemographic and psychosocial factors contribute to the development and maintenance of symptoms, this study investigates the predictive value of these factors for bothersome somatic symptoms in SARS-CoV-2 negative healthcare professionals.</p><p><strong>Methods: </strong>German healthcare professionals were assessed with self-rating questionnaires and underwent SARS-CoV-2 IgG antibody tests at baseline and 8 weeks later between April and August 2020. Differences in psychosocial variables between the time points were analyzed and regression analyses were performed to predict somatic symptoms at follow-up.</p><p><strong>Results: </strong>1185 seronegative healthcare professionals completed both assessments. Previous somatic symptom burden, higher levels of anxiety, being a nurse, younger age, higher psychological symptom burden, lower efficiency, and higher fatigability at baseline predicted somatic symptom burden at follow-up. Comparisons between baseline and follow-up showed a significant improvement in psychological impairment and deterioration of physical exhaustion.</p><p><strong>Conclusions: </strong>Our study applies a biopsychosocial perspective to bothersome somatic symptoms during the COVID-19 pandemic and contributes to the identification of potential risk factors as a starting point for future interventions that could support the handling of symptoms.</p>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"55 ","pages":"1111-1121"},"PeriodicalIF":3.3,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41273849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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: 4

Hydrous carbonate-containing brucite (HCB) in MgO/hydromagnesite blends 氧化镁/氢菱镁矿混合物中含水镁石(HCB)

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2023-11-01 DOI: 10.1016/j.cemconres.2023.107304

Alexander German , Frank Winnefeld , Pietro Lura , Daniel Rentsch , Barbara Lothenbach

{"title":"Hydrous carbonate-containing brucite (HCB) in MgO/hydromagnesite blends","authors":"Alexander German , Frank Winnefeld , Pietro Lura , Daniel Rentsch , Barbara Lothenbach","doi":"10.1016/j.cemconres.2023.107304","DOIUrl":"10.1016/j.cemconres.2023.107304","url":null,"abstract":"<div><p>The hydration of reactive MgO in presence of hydromagnesite was investigated using analyses of the solid and the liquid phase. A brucite-like phase with low crystallinity was identified as hydration product. A partial destabilization of hydromagnesite was observed and it is suggested that the carbonate was taken up by the brucite-like phase. Furthermore, it was evidenced by thermogravimetry that this phase contained loosely bound “gel water”. Thus, a hypothetical <em>hydrous carbonate</em>-containing <em>brucite</em> (HCB) phase is proposed with a tentative composition MgCO<sub>3</sub>·35Mg(OH)<sub>2</sub>·H<sub>2</sub>O derived from mass balance calculations. Based on the solution chemistry and other considerations, its thermodynamic data were determined. Thermodynamic modeling of the hydrate assemblage of MgO/hydromagnesite blends confirmed the stability of HCB in the presence of hydromagnesite and brucite.</p></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"173 ","pages":"Article 107304"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0008884623002181/pdfft?md5=1582310352468aefdd44cbe6f6d36966&pid=1-s2.0-S0008884623002181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43678379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The cement plant of tomorrow 明天的水泥厂

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2023-11-01 DOI: 10.1016/j.cemconres.2023.107290

Martin Schneider, Volker Hoenig, Johannes Ruppert, Jörg Rickert

引用次数: 0

Carbonation mechanisms and kinetics of lime-based binders: An overview 石灰基粘结剂的碳化机理和动力学综述

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2023-11-01 DOI: 10.1016/j.cemconres.2023.107301

Carlos Rodriguez-Navarro, Teodora Ilić, Encarnación Ruiz-Agudo, Kerstin Elert

{"title":"Carbonation mechanisms and kinetics of lime-based binders: An overview","authors":"Carlos Rodriguez-Navarro, Teodora Ilić, Encarnación Ruiz-Agudo, Kerstin Elert","doi":"10.1016/j.cemconres.2023.107301","DOIUrl":"10.1016/j.cemconres.2023.107301","url":null,"abstract":"<div><p>The reaction of slaked lime with atmospheric CO<sub>2</sub> in the presence of humidity leads to the formation of cementing carbonate phases in traditional aerial lime mortars and plasters. This carbonation reaction also affects the setting and degradation of hydraulic lime mortars and modern cement. Here, we present an overview of the existing knowledge on carbonation of lime-based binders, which are experiencing a revival as compatible material for the conservation of the built heritage and new sustainable construction. First, the carbonation reaction is defined and its importance in a range of technical and natural processes is outlined. This sets the ground for presenting a review of existing mechanistic models for the carbonation of lime-based materials, including the recent interface-coupled dissolution-precipitation model, and the understanding of carbonation in terms of non-classical crystallization theory. Kinetics models and experimental results for carbonation of lime-based binders (crystals and powder, as well as mortars/plasters) and its acceleration are presented and discussed. Finally, conclusions and future research directions are indicated.</p></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"173 ","pages":"Article 107301"},"PeriodicalIF":11.4,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0008884623002156/pdfft?md5=222e0966ea0483711640397fb5888002&pid=1-s2.0-S0008884623002156-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48665900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1