Cement and Concrete Research最新文献

Robust superhydrophobic cementitious composites with ex-situ carbonation: Performance and mechanism 非原位碳化的超疏水胶凝复合材料：性能和机理

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-11 DOI: 10.1016/j.cemconres.2025.108059

Yifeng Ling, Guang Yin, Lijun Wang, Hui Jin, Bo Li, Weizhuo Shi, Shilang Xu

{"title":"Robust superhydrophobic cementitious composites with ex-situ carbonation: Performance and mechanism","authors":"Yifeng Ling, Guang Yin, Lijun Wang, Hui Jin, Bo Li, Weizhuo Shi, Shilang Xu","doi":"10.1016/j.cemconres.2025.108059","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108059","url":null,"abstract":"Superhydrophobic surfaces have attracted significant attention due to their ability to enhance the durability of concrete by preventing water and aggressive agent penetration. However, traditional superhydrophobic materials have limitations, being poorly durable and prone to wear. In this study, we propose a novel design for robust superhydrophobic cementitious composites: nano-CaCO₃ is grown ex-situ on fly ash particles to ensure the complete leaching of Ca2+ from carbide slag during carbonation, which also allows nano-CaCO₃ to be uniformly introduced into the composite through a carrier effect of carbonated fly ash. In addition, fluoroalkylsilane was incorporated into the carbon-sequestered composite to further reduce surface energy and achieve superhydrophobicity. The results demonstrate that the hydrophobicity of the composites is closely tied to the carbonation process, with a contact angle of 163.0° which signifies a superhydrophobic condition. This study provides valuable insights into the innovative design and production of carbon-sequestered, robust superhydrophobic cement-based materials.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"24 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260812","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

CO2 uptake in calcium aluminosilicate materials 钙铝硅酸盐材料对CO2的吸收

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-11 DOI: 10.1016/j.cemconres.2025.108056

Subhashree Panda, Luis Schnürer, Alisa Machner, Luis Ruiz Pestana, Prannoy Suraneni

{"title":"CO2 uptake in calcium aluminosilicate materials","authors":"Subhashree Panda, Luis Schnürer, Alisa Machner, Luis Ruiz Pestana, Prannoy Suraneni","doi":"10.1016/j.cemconres.2025.108056","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108056","url":null,"abstract":"CO2 mineralization has gained increasing attention as a strategy to reduce emissions from concrete production. This study investigates the carbonation potential of several calcium aluminosilicate (CAS) materials, model systems for understanding supplementary cementitious materials (SCMs). CAS materials were synthesized at temperatures ranging from 1000 °C to 1600 °C, producing structures ranging from partially crystalline to fully amorphous. X-ray diffraction and scanning electron microscopy were used to understand material physicochemical properties. Carbonation potential was assessed through CO2 uptake measurements using thermogravimetric analysis and Fourier-transform infrared spectroscopy, while SCM reactivity was evaluated via a modified R3 test. Results show that materials synthesized at 1000 °C and 1200 °C, containing unreacted oxides, portlandite, CA, and C2S, exhibited the highest CO2 uptake but the lowest reactivity as SCM. In contrast, fully amorphous glasses synthesized at 1600 °C demonstrated significantly higher SCM reactivity but minimal CO2 uptake. These findings highlight a fundamental trade-off between their reactivity and carbonation potential, governed by the degree of amorphization.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"2 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145261121","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

Influence of FRP rebar polymer matrix leachates on cement hydration and bond performance in FRP-reinforced concrete 玻璃钢钢筋聚合物基质浸出液对玻璃钢混凝土水泥水化及粘结性能的影响

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-10 DOI: 10.1016/j.cemconres.2025.108051

Amir Behravan, Cooper Davenport, Emily Spradley, B. Dulani Dhanapala, Bernard Kassner, Stephen Sharp, Alyson Daniels

{"title":"Influence of FRP rebar polymer matrix leachates on cement hydration and bond performance in FRP-reinforced concrete","authors":"Amir Behravan, Cooper Davenport, Emily Spradley, B. Dulani Dhanapala, Bernard Kassner, Stephen Sharp, Alyson Daniels","doi":"10.1016/j.cemconres.2025.108051","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108051","url":null,"abstract":"Fiber-reinforced polymer (FRP) rebars are increasingly used in construction due to their advantages over conventional steel reinforcement. However, well-established standards and design codes for all FRP types remain limited. While most previous studies have focused on the mechanical bond between FRP rebars and concrete, this study provides a detailed investigation of how organic compounds leached from FRP rebars affect cement hydration kinetics and, consequently, bond performance. Ten different FRP rebars—including glass (GFRP), basalt (BFRP), and carbon (CFRP) types—were examined. Analytical techniques such as total organic carbon (TOC), ICP-MS, and FTIR confirmed the leaching of organic compounds from the rebars. Subsequent experiments using isothermal calorimetry, SEM, and mechanical testing assessed how these leachates influence cement hydration in the vicinity of the rebars. The results indicate that specific organic compounds from the polymer matrix can negatively affect hydration in the transition zone, reducing the quality of the interfacial bond between FRP rebars and the cementitious matrix. These findings highlight the importance of chemical interactions at the FRP–concrete interface and suggest that both improvements to the rebar surface and modifications to the concrete mixture should be considered. Given the variability among different FRP rebars, a single universal design guideline may not be sufficient for all products.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"57 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260811","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

Carbonation behavior of Portland cement incorporating polycarboxylate ether superplasticizer: Towards carbonation kinetics, microstructural evolution and mechanical properties 掺聚羧酸醚减水剂硅酸盐水泥的碳化行为：碳化动力学、微观结构演变和力学性能研究

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-10 DOI: 10.1016/j.cemconres.2025.108061

Jionghuang He, Guangcheng Long, Yi Jiang, Qinglong Qin, Cong Tang, Yong Tao, Peiliang Shen, Chi-Sun Poon

{"title":"Carbonation behavior of Portland cement incorporating polycarboxylate ether superplasticizer: Towards carbonation kinetics, microstructural evolution and mechanical properties","authors":"Jionghuang He, Guangcheng Long, Yi Jiang, Qinglong Qin, Cong Tang, Yong Tao, Peiliang Shen, Chi-Sun Poon","doi":"10.1016/j.cemconres.2025.108061","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108061","url":null,"abstract":"Polycarboxylate ether (PCE) superplasticizers are crucial in modern concrete, yet their compatibility with carbonation curing, a promising CO2 sequestration method, remains insufficiently understood. This study systematically examined carbonation behavior of Portland cement (PC) incorporating PCE by analyzing its phase assemblage, microstructure, carbonation heat, solution chemistry and mechanical properties. Results indicated that PCE significantly reduced the carbonation rate. The peak rate of carbonation heat in pure PC reached 0.57 W/g, while the addition of 2.0 % PCE reduced this value by 43.9 %. This reduction was attributed to the adsorption and complexation effects of PCE, the immobilization of CaCO3 clusters within polymer network, as well as a rapid decrease in solution pH. Furthermore, the aggressive carbonation kinetics amplified the detrimental impact of PCE on microstructural development. This inhibited carbonation at particle boundaries and weakened interparticle bonding, thereby leading to a decline in mechanical performance. These findings offer fundamental insights into the compatibility and limitations of using PCE in combination with carbonation technologies in concrete.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"18 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260810","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

Sulfate adjustment and early reactivity in cements containing kaolinitic calcined clays: investigation and assessment via a sulfate-limited model system 硫酸盐调节和含高岭石煅烧粘土的水泥的早期反应性：通过硫酸盐限制模型系统的研究和评估

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-10 DOI: 10.1016/j.cemconres.2025.108060

Tafadzwa Ronald Muzenda, Yannick Demeusy, Fabien Georget, Christophe Labbez, Thomas Matschei

引用次数: 0

Clinoptilolite zeolite as a substrate for alkali-boosting cement hydration 斜沸石作为底物对水泥的碱促水化作用

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-10 DOI: 10.1016/j.cemconres.2025.108057

M. Shariful Islam, Joseph J. Biernacki, Benjamin J. Mohr

{"title":"Clinoptilolite zeolite as a substrate for alkali-boosting cement hydration","authors":"M. Shariful Islam, Joseph J. Biernacki, Benjamin J. Mohr","doi":"10.1016/j.cemconres.2025.108057","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108057","url":null,"abstract":"Clinoptilolite-Ca zeolite exhibited limited pozzolanic activity at early ages in portland cement systems, resulting in slower initial hydration and strength development. Conversion of Ca-zeolite to Na- or K-forms, combined with increasing the pH of the blended system through pH engineering of the treated zeolite, substantially enhanced its reactivity. Calorimetry revealed accelerated C₃S and C₃A hydration, with higher peak intensities and shorter dormancy periods for Na-or-K zeolites, whereas bulk portlandite analysis indicated that Ca-zeolite inhibits clinker reactions. Phase-resolved quantitative EDS confirmed these trends, showing retardation of hydration for Ca-zeolite and promotion of both silicate and aluminate phases reactions for Na-and K-zeolites, along with the formation of relatively higher amounts of AFm phases. Chemical shrinkage and mortar strength measurements further supported these findings. Notably, pH-engineered zeolites increased early-age strength by up to 10 %, with 7-days mortar strength remaining equivalent even at 20 % cement replacement, highlighting their potential as sustainable supplementary cementitious materials.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"35 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145260809","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

Accelerated carbonation fronts in cement pastes: Mechanistic insights and simplified modeling 水泥浆体中的加速碳化前沿：力学见解和简化建模

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-09 DOI: 10.1016/j.cemconres.2025.108050

Luge Cheng, Ryo Kurihara, Zhenli Yang, Takahiro Ohkubo, Ryoma Kitagaki, Atsushi Teramoto, Yuya Suda, Ippei Maruyama

{"title":"Accelerated carbonation fronts in cement pastes: Mechanistic insights and simplified modeling","authors":"Luge Cheng, Ryo Kurihara, Zhenli Yang, Takahiro Ohkubo, Ryoma Kitagaki, Atsushi Teramoto, Yuya Suda, Ippei Maruyama","doi":"10.1016/j.cemconres.2025.108050","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108050","url":null,"abstract":"This study investigated the carbonation behavior of ordinary Portland cement (OPC), volcanic glass powder (VGP), and limestone-calcined clay cement (LC3) pastes, focusing on the water content distribution, phase assemblages, and microstructural evolution. Spatiotemporal changes in water and mineral phases were tracked using proton nuclear magnetic resonance relaxometry and micro-X-ray diffraction, respectively. A simplified model reproduced the drying front, defined by a material-specific threshold water content, which aligned closely with the experimentally measured carbonation front. This confirmed that carbonation progression is governed by water diffusion, referred to as the “plugging effect”. Furthermore, carbonation advanced until empty space increased to approximately 18 %, resulting from the decalcification-induced agglomeration of calcium (alumino) silicate hydrate (C–(A)–S–H). This limit was consistently observed across pastes with varying Ca/(Si + Al) ratios. These findings provide mechanistic insight into carbonation front development and offer a physically grounded criterion for predicting carbonation depth and assessing CO₂ uptake in sustainable cementitious materials.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"39 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247354","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 reactivity of secondary materials as cement substitutes: Modifications to strength activity index methodology 量化作为水泥替代品的二次材料的反应性：对强度活性指数方法的改进

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-08 DOI: 10.1016/j.cemconres.2025.108055

Taohua Ye, Jianzhuang Xiao, Zihan Zhou, Tongbo Sui

{"title":"Quantifying reactivity of secondary materials as cement substitutes: Modifications to strength activity index methodology","authors":"Taohua Ye, Jianzhuang Xiao, Zihan Zhou, Tongbo Sui","doi":"10.1016/j.cemconres.2025.108055","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108055","url":null,"abstract":"Strength activity index (SAI) testing often serves as the benchmark for other reactivity tests, such as the rapid, relevant, and reliable (R3) test. However, the flaws in the SAI methodology compromise its accuracy. In this study, the SAI test is revisited and intensively modified by decoupling SCM physicochemical effects and mitigating the influence of SCM density and water sorption. The modified SAI test is validated using quartz powder (QP) and six secondary materials, including fly ash (FA), ground granulated blast furnace slag (GGBFS), recycled concrete powder (RCP), carbonated RCP (CRCP), and thermoactivated RCP (T650 and T750). The results of the modified SAI test closely align with those of the simplified R3 test (R2 > 0.90), confirming the reactivity ranking: GGBFS ≈ FA > T750 ≈ T650 > CRCP > RCP ≈ QP. Moreover, the application conditions of the modified SAI test are also identified. In summary, this study contributes to reliable reactivity quantification to support appropriate SCM utilization in cementitious systems.","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"21 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145241524","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

Autogenous shrinkage mitigation effect of superabsorbent polymers on alkali-activated GGBFS-FA binary binder without additional water: performance, microstructure and mechanism 不加水的高吸水性聚合物对碱活化GGBFS-FA二元粘结剂的自收缩减缓作用：性能、微观结构及机理

IF 11.4 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-08 DOI: 10.1016/j.cemconres.2025.108058

Beifeng Lv, Lizhong Wang, Qiang Zeng, Hengyu Liu, Yujie Li, Zhen Guo

{"title":"Autogenous shrinkage mitigation effect of superabsorbent polymers on alkali-activated GGBFS-FA binary binder without additional water: performance, microstructure and mechanism","authors":"Beifeng Lv, Lizhong Wang, Qiang Zeng, Hengyu Liu, Yujie Li, Zhen Guo","doi":"10.1016/j.cemconres.2025.108058","DOIUrl":"https://doi.org/10.1016/j.cemconres.2025.108058","url":null,"abstract":"This work seeks to explore the mechanisms of superabsorbent polymers (SAP) in mitigating autogenous shrinkage of an alkali-activated ground granulated blast furnace slag-fly ash (GGBFS-FA) binary binder through elaborate microstructural analysis. The effect patterns of SAP with different dosages (0–0.5 %) and particle sizes (91–631 μm) on the setting time, workability, mechanical strength and autogenous shrinkage were tested. Porosity, pore size distribution, specific surface area, and chemical characteristics were systematically explored. Results revealed that 0.5 % SAP interrupted capillary stress through pore coarsening, thereby reducing autogenous shrinkage by 80 % (3266.57 to 637.89 με). Smaller SAP particle (91 μm) enhanced water release efficiency and promoted calcium silicoaluminate hydrate (C-(A)-S-H) gel formation, while larger SAP particle (631 μm) delayed water release and improved strength with slower shrinkage stabilization. The findings on the water release characteristics and pore coarsening mechanism of SAP deepen our understanding of autogenous shrinkage controls in alkali-activated materials (AAM).","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"86 1","pages":""},"PeriodicalIF":11.4,"publicationDate":"2025-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247349","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

Diffusion and physicochemical behavior of chloride and sodium ions in C-S-H gel pores : A molecular dynamics investigation 氯离子和钠离子在C-S-H凝胶孔隙中的扩散和物理化学行为：分子动力学研究

IF 13.1 1区工程技术

Cement and Concrete Research Pub Date : 2025-10-04 DOI: 10.1016/j.cemconres.2025.108053

Tarek Ihaddadene, Jérôme Claverie, François Bignonnet, Ouali Amiri

{"title":"Diffusion and physicochemical behavior of chloride and sodium ions in C-S-H gel pores : A molecular dynamics investigation","authors":"Tarek Ihaddadene, Jérôme Claverie, François Bignonnet, Ouali Amiri","doi":"10.1016/j.cemconres.2025.108053","DOIUrl":"10.1016/j.cemconres.2025.108053","url":null,"abstract":"<div><div>Calcium silicate hydrate (C-S-H) gel is an amorphous material with a complex, disordered structure that complicates the understanding of its atomic-scale properties. While many studies have investigated ionic diffusion in C-S-H pores, the behavior of sodium ( <figure><img></figure> ) and chloride ( <figure><img></figure> ) ions, particularly in relation to the Ca/Si ratio, is not well understood. In this study, atomistic models of C-S-H were developed with varying Ca/Si ratios, pore sizes, and NaCl concentrations. Molecular dynamics simulations were used to calculate the self-diffusion profiles of <figure><img></figure> and <figure><img></figure> ions. Results indicate that pore size strongly affects diffusivity and adsorption through confinement and electrical double layer effects. The solid surface influences ionic mobility up to approximately 1.2 nm. The Ca/Si ratio has minimal impact on the diffusion profiles of non-adsorbed ions, but its rise enhances <figure><img></figure> mobility near the surface and increases chloride binding capacity, consistent with prior studies.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"199 ","pages":"Article 108053"},"PeriodicalIF":13.1,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216160","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