Cement & concrete composites最新文献_第8页

Mono-/poly-disperse nano-silica deposition for carbon textile-reinforced concrete: Microscale characterization 碳纤维纤维增强混凝土用单/多分散纳米二氧化硅沉积：微尺度表征

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-25 DOI: 10.1016/j.cemconcomp.2025.106201

Hyun-Soo Youm , Sung-Gul Hong

{"title":"Mono-/poly-disperse nano-silica deposition for carbon textile-reinforced concrete: Microscale characterization","authors":"Hyun-Soo Youm , Sung-Gul Hong","doi":"10.1016/j.cemconcomp.2025.106201","DOIUrl":"10.1016/j.cemconcomp.2025.106201","url":null,"abstract":"<div><div>Structural use of carbon textile-reinforced concrete (CTRC) remains challenging, primarily due to the lack of thermomechanical robustness at the textile/matrix interface. Nano-silica (NS) deposition has emerged as a viable solution to oft-employed polymer-based practices. However, its bond-enhancing mechanism is yet far from clear. This study presents results from a series of microscale characterizations to elucidate how the hydrodynamic properties of NS particles influence deposition characteristics and the interfacial bond. Results show that NS particles adsorb onto the roving surface more effectively with smaller mean particle size and higher polydispersity. The underlying mechanism is the adsorption-based interactions involving deposition-driving forces and interparticle attraction, which compete against desorption to immobilize the deposited particles. Such variations in deposition characteristics lead to polymorphism in the reticular network layer of secondary calcium silicate hydrate (C–S–H) phases. Its coverage level and topographical complexity both favor cohesive interconnection and microstructural densification in the roving/matrix interfacial transition zone (ITZ), playing crucial parts in improving mechanical properties. Correlation analysis indicates that a comprehensive interpretation from both chemical and physical aspects is key to unraveling the bond-enhancing mechanism of NS deposition.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106201"},"PeriodicalIF":10.8,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144479517","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

Characterizing the moisture migration and phase transition in cement-based materials during in-situ freeze-thaw cycles by hydrogen nuclear magnetic resonance (1H NMR) 用氢核磁共振（1H NMR）表征水泥基材料在原位冻融循环过程中的水分迁移和相变

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-24 DOI: 10.1016/j.cemconcomp.2025.106204

Yuzhu Yang , Jianhui Liu , Shuqing Zhang , Changbiao Jiang , Leping Liu , Zheng Chen , Caijun Shi

{"title":"Characterizing the moisture migration and phase transition in cement-based materials during in-situ freeze-thaw cycles by hydrogen nuclear magnetic resonance (1H NMR)","authors":"Yuzhu Yang , Jianhui Liu , Shuqing Zhang , Changbiao Jiang , Leping Liu , Zheng Chen , Caijun Shi","doi":"10.1016/j.cemconcomp.2025.106204","DOIUrl":"10.1016/j.cemconcomp.2025.106204","url":null,"abstract":"<div><div>Understanding the moisture migration and phase transition in cement-based materials during freeze-thaw processes is of great significance for evaluating the remaining service life of structures in cold regions. This study explores moisture migration and phase transition in cement paste during in-situ freeze-thaw cycles by <sup>1</sup>H NMR. A model is established to calculate ice content under varying freeze-thaw cycles and temperatures, with energy changes during freeze-thaw deterioration also computed based on this ice content model. These insights shed new light on the damage mechanisms of cement-based materials. The findings reveal a three-stage freeze-thaw damage process: deterioration accumulation, deterioration acceleration, and failure stage. Differences in moisture migration and phase transitions are examined throughout these stages. Results indicate that <sup>1</sup>H NMR technology effectively characterizes moisture migration and phase transitions during freeze-thaw cycles. Furthermore, the cumulative energy sustained by the cement paste at each stage of freeze-thaw damage process is constant. This study provides a theoretical foundation for understanding the freeze-thaw damage mechanism.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106204"},"PeriodicalIF":10.8,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371283","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

Effect of supplementary cementitious materials on durability of ultra-high-performance concrete: A review 补充胶凝材料对高性能混凝土耐久性的影响研究进展

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-23 DOI: 10.1016/j.cemconcomp.2025.106198

Jihun Song , Nemkumar Banthia , Doo-Yeol Yoo

{"title":"Effect of supplementary cementitious materials on durability of ultra-high-performance concrete: A review","authors":"Jihun Song , Nemkumar Banthia , Doo-Yeol Yoo","doi":"10.1016/j.cemconcomp.2025.106198","DOIUrl":"10.1016/j.cemconcomp.2025.106198","url":null,"abstract":"<div><div>Interest in using different supplementary cementitious materials (SCMs) in ultra-high-performance concrete (UHPC) as alternatives to conventional cement has increased due to their potential to reduce the carbon footprint and enhance UHPC durability. This paper thoroughly reviews the individual and synergistic effects of various SCMs—silica fume, fly ash, ground granulated blast furnace slag, metakaolin, rice husk ash, and other novel SCMs—on key durability properties of UHPC, including water and chloride permeability, chemical attack resistance, and volume deformation. A comprehensive literature review of existing studies, statistical analysis of SCM particle size distributions, and comparative evaluation of different UHPC mixture designs were conducted. The review revealed that the incorporation of SCMs generally enhances the durability performance of UHPC through increased pozzolanic reactivity and effective particle packing. Durability improvements observed in different combinations of SCMs demonstrate their notable synergistic effects. The findings underscore significant variations in effectiveness based on SCM particle size, replacement percentage, and curing conditions. Recommendations for future studies highlight the exploration of novel SCMs to facilitate broader practical applications of sustainable UHPC.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106198"},"PeriodicalIF":10.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144340835","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

Optimizing the self-sensing properties of alkali-activated conductive mortar with aligned nickel-coated carbon fibers 定向镀镍碳纤维碱活化导电砂浆自传感性能优化

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-23 DOI: 10.1016/j.cemconcomp.2025.106206

Yuwei Ma , Tiantian Luo , Chengcai Jiang , Yuanjie Lu , Yunkai Gong , Fangjie Li , Zongjin Li , Hao Wang , Jiyang Fu

{"title":"Optimizing the self-sensing properties of alkali-activated conductive mortar with aligned nickel-coated carbon fibers","authors":"Yuwei Ma , Tiantian Luo , Chengcai Jiang , Yuanjie Lu , Yunkai Gong , Fangjie Li , Zongjin Li , Hao Wang , Jiyang Fu","doi":"10.1016/j.cemconcomp.2025.106206","DOIUrl":"10.1016/j.cemconcomp.2025.106206","url":null,"abstract":"<div><div>Self-sensing concrete (SC), a composite material integrating structural and sensing functions, plays a key role in the development of intelligent concrete infrastructure. This study presents an innovative method using alkali-activated materials (AAM) as binders and nickel-coated carbon fibers (NCFs) as conductive fillers to improve the self-sensing properties of alkali-activated conductive mortars (AACMs). The influences of fiber orientation (random, parallel, vertical) and NCF content (0–0.3 %) on the electrical conductivity and piezoresistive properties of AACMs were investigated. Scanning electron microscopy (SEM) and optical microscopy were used to analyze the fiber-binder interface and fiber orientation factor. The results indicated that replacing carbon fibers with NCFs significantly reduced the resistivity of AACM, while AACM exhibited anisotropic electrical properties after fiber orientation. Parallel-oriented AACM exhibited low resistivity (97.97 Ω cm) and superior piezoresistive performance under cyclic loading, achieving a peak FCR of 26.1 % and GF of 394.05, demonstrating excellent signal reversibility, repeatability, and stability, while vertical orientation had an adverse effect. With the assistance of fiber alignment, AACM with a small NCF content (0.1 vol%) greatly enhanced the piezoresistive performance. A linear correlation was found between the orientation factor, conductivity, and piezoresistive properties, confirming the role of fiber alignment in optimizing the self-sensing performance of AACM.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106206"},"PeriodicalIF":10.8,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144371288","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

Polyethylene oxide-magnesium phosphate cement composite as a high-performance solid-state electrolyte 聚氧聚乙烯-磷酸镁水泥复合材料作为高性能固态电解质

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-23 DOI: 10.1016/j.cemconcomp.2025.106197

Xiangrui Meng , Bing Chen , Meijia Liu , Zhenzhen Liu , Wenjian Xie , Mingzheng Zhu , Pei Yan , Liyan Wang

引用次数: 0

Multi-species flow and reactive transport processes of seawater into a cement matrix simulated via Bayesian physics-informed neural networks 通过贝叶斯物理信息神经网络模拟海水进入水泥基质的多物种流动和反应输运过程

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-22 DOI: 10.1016/j.cemconcomp.2025.106205

Jin-Ho Bae , Naru Kim , Seonhyeok Kim , Joonho Seo

{"title":"Multi-species flow and reactive transport processes of seawater into a cement matrix simulated via Bayesian physics-informed neural networks","authors":"Jin-Ho Bae , Naru Kim , Seonhyeok Kim , Joonho Seo","doi":"10.1016/j.cemconcomp.2025.106205","DOIUrl":"10.1016/j.cemconcomp.2025.106205","url":null,"abstract":"<div><div>This study proposes a reactive transport model that integrates thermodynamic principles and ion exchange modeling to predict multi-species flows and reactive transport processes during seawater infiltration into a cement matrix. First, cement phase transformations and the corresponding porosity evolution resulting from ion-solid exchange between seawater and the cement phases are modeled using thermodynamics. By incorporating thermodynamics into the reactive transport model, a multi-species flow and ion exchange between the ions and cement phases could be investigated simultaneously. The proposed model is then implemented into Bayesian physics-informed neural networks to estimate the model parameters statistically via Bayesian inference and to solve the governing partial differential equations as well as the boundary value problems of the multi-species flow. The present predictions for a multi-species flow and cement-phase transformation as well as the porosity evolution are compared with experimental results to evaluate the model's predictive capabilities.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106205"},"PeriodicalIF":10.8,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337578","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

Quantifying anisotropic chloride diffusion coefficients of interfacial transition zone in concrete 混凝土界面过渡区氯离子各向异性扩散系数的定量研究

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-22 DOI: 10.1016/j.cemconcomp.2025.106199

Zushi Tian , Haodong Ji , Ye Tian , Hailong Ye

{"title":"Quantifying anisotropic chloride diffusion coefficients of interfacial transition zone in concrete","authors":"Zushi Tian , Haodong Ji , Ye Tian , Hailong Ye","doi":"10.1016/j.cemconcomp.2025.106199","DOIUrl":"10.1016/j.cemconcomp.2025.106199","url":null,"abstract":"<div><div>Experimental measurement of chloride ion diffusion coefficient and pore structure of the interfacial transition zone (ITZ) between cement paste and aggregate in concrete is challenging because of its microscopic scale. The quantitative relationship between pore connectivity and the chloride diffusion coefficient has yet to be established and experimentally validated. In this work, the chloride ion diffusion coefficient in the ITZ was directly determined in experiments using artificial aggregates and the natural diffusion method, which closely simulates the realistic service conditions of concrete. The pore connectivity was analyzed using a three-dimensional pore structure model based on cement hydration. The results indicate that the magnitude of diffusion coefficient in the ITZ is approximately five to ten times that of the cement paste. In addition, the chloride ion diffusion coefficient in the ITZ exhibits anisotropy: in the direction parallel to the aggregate interface, there is high porosity connectivity and a large diffusion coefficient. This is the primary reason behind the distinctive diffusion behavior of chloride ions inside ITZ from that in bulk cement paste, as evidenced by the linear relationship between the diffusion coefficient and porosity.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106199"},"PeriodicalIF":10.8,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337580","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

Performance of cement-lime mortars against salt crystallization using experimental accelerated weathering tests 水泥-石灰砂浆抗盐结晶性能的加速风化试验

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-22 DOI: 10.1016/j.cemconcomp.2025.106196

Dulce E. Valdez Madrid , Nele De Belie , Veerle Cnudde

{"title":"Performance of cement-lime mortars against salt crystallization using experimental accelerated weathering tests","authors":"Dulce E. Valdez Madrid , Nele De Belie , Veerle Cnudde","doi":"10.1016/j.cemconcomp.2025.106196","DOIUrl":"10.1016/j.cemconcomp.2025.106196","url":null,"abstract":"<div><div>This study investigates the resistance of six cement-lime mortar compositions against salt crystallization under accelerated weathering conditions. Sodium chloride (NaCl) and sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>) solutions at various concentrations were used to simulate salt-induced damage, comparing the efficacy of two distinct salt crystallization testing protocols: the EN 12370 standard and a modified version of the newly developed RILEM TC 271-ASC recommendation adapted for mortars. Results demonstrate that cement-lime mortars exhibit a higher susceptibility to salt crystallization damage compared to pure cement mortars, when exposed to both NaCl and Na<sub>2</sub>SO<sub>4</sub>. The EN 12370 standard was found to induce unrealistic decay patterns, overestimating damage, while the adapted RILEM methodology produced more representative and quantifiable deterioration. This work highlights critical limitations of current standard methods and offers an improved, realistic approach for evaluating the durability of lime- and cement-based materials with various pore size distributions.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106196"},"PeriodicalIF":10.8,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144337577","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

Experimental investigations on elasto-plastic behavior and fracture mechanism of ASR-damaged concrete asr损伤混凝土弹塑性性能及断裂机制试验研究

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-18 DOI: 10.1016/j.cemconcomp.2025.106192

Hyo Eun Joo , Xi Ji , Yuya Takahashi , Misato Fujishima , Taito Miura

{"title":"Experimental investigations on elasto-plastic behavior and fracture mechanism of ASR-damaged concrete","authors":"Hyo Eun Joo , Xi Ji , Yuya Takahashi , Misato Fujishima , Taito Miura","doi":"10.1016/j.cemconcomp.2025.106192","DOIUrl":"10.1016/j.cemconcomp.2025.106192","url":null,"abstract":"<div><div>The crack patterns of alkali silica reaction (ASR)-damaged concrete vary depending on many environmental factors, and the damaged concrete with dispersed crack patterns shows a compressive behavior that differs from that of cracked concrete owing to external loads, not ASR damage, despite undergoing a substantial ASR expansion. Therefore, investigating the mechanisms governing the mechanical behavior of ASR-damaged concrete is necessary. Monotonic and cyclic compression tests were conducted on ASR-damaged concrete with ASR expansion and long-term storage conditions as test variables. The elastoplastic behavior and fracture progress of the ASR-damaged concrete were investigated, and crack propagation was observed using digital image correlation (DIC) measurements. The test results showed that the compressive strength, elastic modulus, and shear elasticity of the concrete tended to decrease with increasing ASR expansion. However, the fracture parameter representing the fracture progress of the ASR-damaged concrete resembled that of the undamaged concrete. This indicates that ASR-damaged concrete with dispersed crack patterns with small widths effectively transferred stress through friction between cracks despite undergoing a large tensile strain owing to ASR. In addition, when the specimen was stored under dry conditions rather than wet conditions for over one year, the elastic modulus, compressive strength, and shear elasticity—degraded by ASR— showed improvement, while the fracture parameter remained nearly unchanged.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106192"},"PeriodicalIF":10.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311981","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

Micro-scale uniaxial compression assessment of hygro-thermo-mechanical interactions in limestone-filler cement paste at low water-to-fine ratio 低水细比石灰石-填料水泥浆体水-热-力相互作用的微尺度单轴压缩评价

IF 10.8 1区工程技术

Cement & concrete composites Pub Date : 2025-06-17 DOI: 10.1016/j.cemconcomp.2025.106194

Mahdiar Dargahi, Luca Sorelli

{"title":"Micro-scale uniaxial compression assessment of hygro-thermo-mechanical interactions in limestone-filler cement paste at low water-to-fine ratio","authors":"Mahdiar Dargahi, Luca Sorelli","doi":"10.1016/j.cemconcomp.2025.106194","DOIUrl":"10.1016/j.cemconcomp.2025.106194","url":null,"abstract":"<div><div>The partial cement substitution with limestone filler (LF) enables the development of sustainable ultra-high-performance concrete (UHPC). While LF reduces the carbon footprint of cement production, its influence on the micromechanical behavior of cement paste under varying environmental conditions has not been fully understood. This study presents a twofold originality: first, by employing uniaxial compression on micrometer-sized specimens to characterize the mechanical properties of cement paste containing fine LF; and second, by assessing the effects of varying relative humidity (RH) and temperature (T) conditions, as an effective method of testing under rapidly archived hygro-thermal equilibrium. Moreover, a dual-method characterization approach, including water adsorption isotherms and X-ray computed microtomography (μ-CT) was employed to verify hygro-thermal equilibrium in the specimens and analyze the microstructure, respectively.</div><div>Micro-prisms (150 × 150 × 300 μm<sup>3</sup>) were fabricated using a high-precision dicing saw from cement pastes with LF additions. Micro-scale uniaxial compression tests were then conducted under controlled conditions at varying RH (10, 30, and 80 %) and T (20, 40, and 60 °C), considering their coupled effects. The increased RH and T levels generally decrease both compressive strength and elastic modulus, showing a fairly non-linear dependence. Notably, LF not only enhances compressive strength, elastic modulus, and fracture energy, but also mitigates RH and T effects, due to the refined pore structure confirmed by μ-CT analysis. This study advances the understanding of the micromechanical properties of cement paste containing LF under varying RH and T conditions at low water-to-fine ratios, providing valuable insights for the development of sustainable UHPC.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"163 ","pages":"Article 106194"},"PeriodicalIF":10.8,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144311983","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