Cement and Concrete Research最新文献

Impact of the slaking method on the mineralogy of natural hydraulic limes and its effects on mortar mechanical properties 熟化方法对天然水工石灰矿物学的影响及其对砂浆力学性能的影响

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-19 DOI: 10.1016/j.cemconres.2025.107941

Clara Parra-Fernández, Anna Arizzi

引用次数: 0

Multi-physics modelling of 3D-printed concrete evolution in environmental conditions 环境条件下3d打印混凝土演变的多物理场建模

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-14 DOI: 10.1016/j.cemconres.2025.107918

Alice Gribonval , Maxime Pierre , Nicolas Ducoulombier , Karam Sab , Romain Mesnil , Jérémy Bleyer

{"title":"Multi-physics modelling of 3D-printed concrete evolution in environmental conditions","authors":"Alice Gribonval , Maxime Pierre , Nicolas Ducoulombier , Karam Sab , Romain Mesnil , Jérémy Bleyer","doi":"10.1016/j.cemconres.2025.107918","DOIUrl":"10.1016/j.cemconres.2025.107918","url":null,"abstract":"<div><div>Extrusion-based 3D-printed cementitious structures have high water loss after printing provoking significant plastic shrinkage. In this study, we propose a thermo-poro-mechanical model of printed cementitious materials, driven by the experimental observation of a positive correlation between the printed wall thickness and compressive strength at the hardened state. The model is developed to represent evaporation at free surfaces, water consumption associated to the cement hydration and water flow within the material, accounting for their effect on temperature variations, strains and on the evolution of stiffness and compressive strength. Comparisons of compressive strength and plastic shrinkage with experiments are presented, demonstrating the validity of the proposed model. In the absence of protective measures, wall thickness is positively correlated with compressive strength and negatively correlated with shrinkage. When preventing evaporation by putting printed specimens in water, plastic shrinkage is significantly reduced and the compressive strength is increased, reaching similar values as cast samples.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"196 ","pages":"Article 107918"},"PeriodicalIF":10.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941241","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

Assessment of thermal cracking and damage in concrete by ultrasonic velocity and Vp/Vs ratio 用超声速度和Vp/Vs比评价混凝土的热裂和损伤

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-13 DOI: 10.1016/j.cemconres.2025.107929

Ding Wang , Jing Tang

引用次数: 0

The meta-kaolinite content of the calcined clay source impacts the mechanical and durability performance of blended Portland concrete 煅烧粘土源的变高岭石含量影响掺合波特兰混凝土的力学性能和耐久性

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-10 DOI: 10.1016/j.cemconres.2025.107922

Yuvaraj Dhandapani , Kirthika Kala Subramanian , Fragkoulis Kanavaris , Leon Black , Susan A. Bernal

{"title":"The meta-kaolinite content of the calcined clay source impacts the mechanical and durability performance of blended Portland concrete","authors":"Yuvaraj Dhandapani , Kirthika Kala Subramanian , Fragkoulis Kanavaris , Leon Black , Susan A. Bernal","doi":"10.1016/j.cemconres.2025.107922","DOIUrl":"10.1016/j.cemconres.2025.107922","url":null,"abstract":"<div><div>This study evaluated the mechanical and durability performance of CEM I and CEM I plus limestone blended concrete produced with calcined clays (CC) with a varying meta-kaolinite content (70, 50 or 20 wt%). Results revealed that concrete with >45 MPa can be produced with a CC with only 20 wt% meta-kaolinite. Increased compressive and flexural strengths were obtained using higher meta-kaolinite content CC. Limestone addition did not significantly change the concretes' transport or durability properties when compared to binary mixes, despite the reduced clinker factor. CC-containing concretes exhibited excellent chloride resistance, but reduced carbonation performance compared with CEM I. Using a CC with higher meta-kaolinite content enhanced the concrete's carbonation resistance, when evaluated for 650 days of natural exposure. This suggests that generalising the impact of CC addition on concrete performance can be misleading, as bespoke concrete, compliant with specific exposure class requirements, can be produced by appropriate clay selection.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"196 ","pages":"Article 107922"},"PeriodicalIF":10.9,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927811","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

Deciphering tensile fatigue behavior of UHPFRC using magnetoscopy, DIC and acoustic emission 利用磁镜、DIC和声发射分析UHPFRC的拉伸疲劳行为

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-10 DOI: 10.1016/j.cemconres.2025.107924

Jian Zhan , Imane Bayane , Eugen Brühwiler , Alain Nussbaumer

{"title":"Deciphering tensile fatigue behavior of UHPFRC using magnetoscopy, DIC and acoustic emission","authors":"Jian Zhan , Imane Bayane , Eugen Brühwiler , Alain Nussbaumer","doi":"10.1016/j.cemconres.2025.107924","DOIUrl":"10.1016/j.cemconres.2025.107924","url":null,"abstract":"<div><div>To explore the governing mechanism underlying the tensile fatigue behavior of Ultra-high Performance Fiber Reinforced Cementitious Composites (UHPFRC), this study tested eight specimens using four advanced non-destructive measurement techniques. First, magnetoscopy is conducted on each specimen to determine the local fiber orientation and volume. Afterward, seven specimens are statically preloaded to the tensile strain of 1.5 ‰, identified as the typical maximum strain of UHPFRC in structural applications; while one specimen to the strain of 0.19 ‰, within the tensile elastic domain. During testing, the specimen response is monitored using digital image correlation and acoustic emission, in addition to displacement transducers. All specimens show similar evolution of fatigue deformation, characterized by three development stages. It is found that the local fiber orientation governs the fatigue deformation behavior. Fatigue deformation concentrates in low fiber orientation zones and fatigue fracture always occurs at the zone with lowest fiber orientation coefficients. The acoustic emission measurement, represented by cumulative energy curve and Ib-values, can appropriately characterize specimen damage degree and distinguish cracking patterns.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"196 ","pages":"Article 107924"},"PeriodicalIF":10.9,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931036","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

Contributions of ettringite, C-S-H, and free water to shotcrete's mechanical properties: Implications from equivalent cement pastes 钙矾石、C-S-H和自由水对喷射混凝土力学性能的贡献：来自同等水泥浆的启示

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-09 DOI: 10.1016/j.cemconres.2025.107927

Haochuan Wang , Xin Liu , Chong Wang , Wei Wang , Jinxiang Hong , Pan Feng

{"title":"Contributions of ettringite, C-S-H, and free water to shotcrete's mechanical properties: Implications from equivalent cement pastes","authors":"Haochuan Wang , Xin Liu , Chong Wang , Wei Wang , Jinxiang Hong , Pan Feng","doi":"10.1016/j.cemconres.2025.107927","DOIUrl":"10.1016/j.cemconres.2025.107927","url":null,"abstract":"<div><div>Ultra-early mechanical properties are critical for shotcrete performance, significantly influenced by ettringite and calcium silicate hydrate (C-S-H) formed during the initial hydration stage and free water. This study investigates the individual and synergistic effects of these phases on mechanical behavior using equivalent cement pastes. In this system, cement was entirely replaced with dolomite particles of matching size distribution, with the controlled introduction of free water, ettringite, and C-S-H. The validity of these equivalent systems was confirmed through comprehensive characterization. Mechanical performance was subsequently evaluated using compression, shear, Vickers hardness and nanoindentation tests. Results revealed that free water remarkably weakened the mechanical properties, whereas both ettringite and C-S-H enhanced strength by reducing voids and reinforcing weak particle interfaces. Ettringite primarily contributed to interparticle friction, while C-S-H enhanced cohesion at interfaces including dolomite-dolomite, dolomite-ettringite and ettringite-ettringite contacts. When co-existing, C-S-H formed within the porous ettringite network, not only establishing a multi-scale filling structure but also stabilizing the dolomite-ettringite skeleton. These findings advance our understanding of the early-age mechanical development of shotcrete and highlight the potential of equivalent cement systems as robust tools for research into cementitious materials.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"196 ","pages":"Article 107927"},"PeriodicalIF":10.9,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924518","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

Hydrogel-guided dispersion strategy for enhancing the toughening efficiency of liquid polymers in cement paste 水凝胶导向分散策略提高水泥浆体中液体聚合物的增韧效率

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-08 DOI: 10.1016/j.cemconres.2025.107926

Han Wang , Junlin Lin , Yanchun Miao , Liguo Wang , Rui Liang , Zeyu Lu , Jinyang Jiang

{"title":"Hydrogel-guided dispersion strategy for enhancing the toughening efficiency of liquid polymers in cement paste","authors":"Han Wang , Junlin Lin , Yanchun Miao , Liguo Wang , Rui Liang , Zeyu Lu , Jinyang Jiang","doi":"10.1016/j.cemconres.2025.107926","DOIUrl":"10.1016/j.cemconres.2025.107926","url":null,"abstract":"<div><div>The toughening efficiency of liquid polymers (LP) for cement-based materials is usually constrained by their agglomeration and discontinuous dispersion in matrix. In this study, a novel hydrogel-guided dispersion strategy was developed, in which the incorporation of 3.0 <em>wt</em>% hydrogel enabled the uniform distribution of 10.0 <em>wt</em>% LP within cement matrix as a continuous network. Accordingly, the flexural strength, toughness and fracture energy of LP cement paste were increased by 108 %, 445 % and 31 %, respectively. Besides, the failure behavior of LP cement paste was changed from brittleness to progressive failure behavior that preserved material integrity, in which the strength remained stable as strain rose from 10 % ∼ 40 %. Moreover, the applicability of this strategy for various LP was verified by expanding the experimental mixtures to 26 groups. A Bayesian optimization-based support vector regression (SVR) model was employed to clarify the contributions of cement, various LP, and hydrogel to mechanical development within the multivariate system. In conclusion, this study proposed a novel strategy to enhance the toughening effect of LP, and provided valuable insights for designing polymer-cement composites using machine learning.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"195 ","pages":"Article 107926"},"PeriodicalIF":10.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143923647","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

Unraveling the role of magnesium salts in liquid alkali-free accelerators: Insights into setting and early-age properties of accelerated cement pastes 揭示镁盐在液体无碱促进剂中的作用：对加速水泥浆的凝结和早期特性的见解

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-07 DOI: 10.1016/j.cemconres.2025.107920

Xin Liu , Dining Li , Mingqi Li , Hui Xie , Xiaohan Yu , Haochuan Wang , Wei Wang , Jinxiang Hong , Zuhua Zhang , Pan Feng

{"title":"Unraveling the role of magnesium salts in liquid alkali-free accelerators: Insights into setting and early-age properties of accelerated cement pastes","authors":"Xin Liu , Dining Li , Mingqi Li , Hui Xie , Xiaohan Yu , Haochuan Wang , Wei Wang , Jinxiang Hong , Zuhua Zhang , Pan Feng","doi":"10.1016/j.cemconres.2025.107920","DOIUrl":"10.1016/j.cemconres.2025.107920","url":null,"abstract":"<div><div>Magnesium salts are key components of liquid alkali-free accelerator; however, their influence on the setting and hardening of accelerated cement pastes remains unclear. This study systematically investigates the role of different magnesium salts by preparing and examining aluminum sulfate (AS)-based accelerators at different dosages. The effects of the accelerators on the setting and early age mechanical properties of the cement pastes were comparatively studied. Results revealed that the type and dosage of magnesium salts significantly affected these properties. Specifically, MgSiF<sub>6</sub> substantially accelerated the cement paste setting, albeit at the expense of early age mechanical strength, owing to its considerable delay in C<sub>3</sub>S hydration. Conversely, both Mg(NO<sub>3</sub>)<sub>2</sub> and MgSO<sub>4</sub> slightly shortened the setting time while improving the 6 h compressive strength, which was attributed to the facilitation of C<sub>3</sub>S hydration and refinement of the cement pore structure. Further analysis of ettringite formation, growth and chemical composition indicated that the low pH environment induced by MgSiF<sub>6</sub> promoted the incorporation of magnesium and fluoride ions into ettringite, leading to the formation of higher-aspect-ratio crystals. This morphological change enhanced the percolation network, thus accelerating cement setting. These findings advance our understanding of the setting and hardening mechanisms of accelerated cement pastes and offer valuable guidelines for optimizing accelerator formulations.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"195 ","pages":"Article 107920"},"PeriodicalIF":10.9,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916796","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

Mechanochemical activation of basaltic fines 玄武岩细粒的机械化学活化

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-05 DOI: 10.1016/j.cemconres.2025.107923

Sofiane Amroun , Luca Galli , Mahfoud Tahlaiti , Prannoy Suraneni

引用次数: 0

Immobilization and leaching behavior of cobalt in alkali-activated fly ash/dehydrated cement paste fine blends 碱活化粉煤灰/脱水水泥膏体细共混物中钴的固定化及浸出行为

IF 10.9 1区工程技术

Cement and Concrete Research Pub Date : 2025-05-05 DOI: 10.1016/j.cemconres.2025.107921

Jaeyeon Park, Seongmin Cho, Heongwon Suh, Sungwun Her, Jihwan Yang, Sungchul Bae

引用次数: 0