Materials最新文献_第2页

Mitigation of Volume Changes in Alkali-Activated Slag by Using Metakaolin. 偏高岭土对碱渣体积变化的抑制作用。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112644

Maïté Lacante, Brice Delsaute, Stéphanie Staquet

{"title":"Mitigation of Volume Changes in Alkali-Activated Slag by Using Metakaolin.","authors":"Maïté Lacante, Brice Delsaute, Stéphanie Staquet","doi":"10.3390/ma18112644","DOIUrl":"10.3390/ma18112644","url":null,"abstract":"This research investigates whether metakaolin can be used as a partial substitution for slag to mitigate significant volume changes in alkali-activated slags. Its effect on compressive strength and workability (as well as on isothermal calorimetry, autogenous strain, and coefficient of thermal expansion (CTE)) were found to depend on both the type and concentration of the alkaline activator. When using 8 M and 10 M sodium hydroxide (NaOH), increasing the substitution rate increased the compressive strength. With sodium silicate (Na2SiO3), compressive strength decreased as the substitution increased. Isothermal calorimetry revealed metakaolin's dilution effect at 10% substitution. With 8 M NaOH, a third reaction peak appeared, whose magnitude increased with the substitution rate, while the second peak decreased. The swelling was increased at 10% substitution, followed by constant shrinkage in case of NaOH-activation. Shrinkage was mitigated with Na2SiO3-activation. Higher substitutions with 8 M NaOH resulted in a significant increase in the shrinkage rate and CTE, occurring when the third reaction peak appeared. A 10% substitution delayed the CTE increase but resulted in higher later-age values (dilution effect). The 20% substitution led to a similar final CTE value at 300 h, while 30% substitution resulted in a decrease in CTE after the initial increase.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156189/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Process Parameters on Pulsed Laser Micromachining for Glass-Based Microfluidic Devices. 工艺参数对脉冲激光微加工玻璃基微流体器件的影响

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112657

Mrwan Alayed, Nojoud Al Fayez, Salman Alfihed, Naif Alshamrani, Fahad Alghannam

{"title":"Effects of Process Parameters on Pulsed Laser Micromachining for Glass-Based Microfluidic Devices.","authors":"Mrwan Alayed, Nojoud Al Fayez, Salman Alfihed, Naif Alshamrani, Fahad Alghannam","doi":"10.3390/ma18112657","DOIUrl":"10.3390/ma18112657","url":null,"abstract":"Glass-based microfluidic devices are essential for applications such as diagnostics and drug discovery, which utilize their optical clarity and chemical stability. This review systematically analyzes pulsed laser micromachining as a transformative technique for fabricating glass-based microfluidic devices, addressing the limitations of conventional methods. By examining three pulse regimes-long (≥nanosecond), short (picosecond), and ultrashort (femtosecond)-this study evaluates how laser parameters (fluence, scanning speed, pulse duration, repetition rate, wavelength) and glass properties influence ablation efficiency and quality. A higher fluence improves the material ablation efficiency across all the regimes but poses risks of thermal damage or plasma shielding in ultrashort pulses. Optimizing the scanning speed balances the depth and the surface quality, with slower speeds enhancing the channel depth but requiring heat accumulation mitigation. Shorter pulses (femtosecond regime) achieve greater precision (feature resolution) and minimal heat-affected zones through nonlinear absorption, while long pulses enable rapid deep-channel fabrication but with increased thermal stress. Elevating the repetition rate improves the material ablation rates but reduces the surface quality. The influence of wavelength on efficiency and quality varies across the three pulse regimes. Material selection is critical to outcomes and potential applications: fused silica demonstrates a superior surface quality due to low thermal expansion, while soda-lime glass provides cost-effective prototyping. The review emphasizes the advantages of laser micromachining and the benefits of a wide range of applications. Future directions should focus on optimizing the process parameters to improve the efficiency and quality of the produced devices at a lower cost to expand their uses in biomedical, environmental, and quantum applications.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12155777/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion Performance and Post-Corrosion Evolution of Tensile Behaviors in Rebar Reinforced Ultra-High Performance Concrete. 钢筋超高性能混凝土的腐蚀性能及腐蚀后拉伸性能演变。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112661

Yuchen Zhang, Sumei Zhang, Xianzhi Luo, Chaofan Wang

{"title":"Corrosion Performance and Post-Corrosion Evolution of Tensile Behaviors in Rebar Reinforced Ultra-High Performance Concrete.","authors":"Yuchen Zhang, Sumei Zhang, Xianzhi Luo, Chaofan Wang","doi":"10.3390/ma18112661","DOIUrl":"10.3390/ma18112661","url":null,"abstract":"The application of rebar reinforced ultra-high-performance concrete (R-UHPC) has been increasingly adopted in engineering structures due to its exceptional mechanical performance and durability characteristics. Nevertheless, when subjected to combined saline and stray current conditions, R-UHPC remains vulnerable to severe corrosion degradation. This investigation examined the corrosion performance and tensile behavior evolution of R-UHPC containing 2.0 vol% copper-coated steel fiber content and HRB400 steel rebar with a reinforcement ratio of 3.1%. The accelerated corrosion process was induced through an impressed current method, followed by direct tensile tests at varying exposure periods. The findings revealed that the embedding of rebar in UHPC led to the formation of fiber-to-rebar (F-R) conductive pathways, generating radial cracks besides laminar cracks. The bonding between rebar and UHPC degraded as corrosion progressed, leading to the loss of characteristic multiple-cracking behavior of R-UHPC in tension. Meanwhile, R-UHPC load-bearing capacity, transitioning from gradual to accelerated deterioration phases with prolonged corrosion, aligns with steel fibers temporally. During the initial 4 days of corrosion, the specimens displayed surface-level corrosion features with negligible steel fiber loss, showing less than 4.0% reduction in ultimate bearing capacity. At 8 days of corrosion, the steel fiber decreased by 22.6%, accompanied by an 18.3% reduction in bearing capacity. By 16 days of corrosion, the steel fiber loss reached 41.5%, with a corresponding bearing capacity reduction of 29.1%. During the corrosion process, corrosion cracks and load-bearing degradation in R-UHPC could be indicated by the ultrasonic damage factor.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156256/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interaction Between Polycarboxylate Superplasticizer and Clay in Cement and Its Sensitivity Inhibition Mechanism: A Review. 聚羧酸型高效减水剂与水泥中粘土的相互作用及其抑敏机理研究进展。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112662

Yu Gao, Yingying Liu, Guanqi Wang, Jiale Liu, Zijian Cao, Qiwen Yong, Hongwei Zhao

{"title":"Interaction Between Polycarboxylate Superplasticizer and Clay in Cement and Its Sensitivity Inhibition Mechanism: A Review.","authors":"Yu Gao, Yingying Liu, Guanqi Wang, Jiale Liu, Zijian Cao, Qiwen Yong, Hongwei Zhao","doi":"10.3390/ma18112662","DOIUrl":"10.3390/ma18112662","url":null,"abstract":"In contemporary construction practices, polycarboxylate superplasticizers (PCEs) have gained extensive utilization in concrete formulation owing to their exceptional dispersive properties and superior water reduction capabilities. Nevertheless, these admixtures demonstrate pronounced susceptibility to clay contamination, a critical limitation that substantially constrains their practical implementation. To mitigate this detrimental effect, multiple technical strategies have been developed to suppress clay sensitivity, with predominant approaches focusing on molecular structure optimization and incorporation of supplementary admixtures. This review systematically investigates the competitive adsorption mechanisms operating at the cement-clay interface. Through rigorous analysis of molecular architecture characteristics and synergistic admixture combinations, we comprehensively review current methodologies for enhancing the clay resistance of PCE-based systems. Furthermore, this paper proposes prospective directions for synthesizing clay-tolerant PCE derivatives, emphasizing molecular design principles and advanced formulation protocols that may inform future research trajectories in construction materials science.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156158/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-Scale Investigation of Fly Ash Aggregates (FAAs) in Concrete: From Macroscopic Physical-Mechanical Properties to Microscopic Structure of Hydration Products. 粉煤灰集料在混凝土中的多尺度研究：从宏观物理力学性能到水化产物的微观结构。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112651

Xue-Fei Chen, Xiu-Cheng Zhang, Ying Peng

{"title":"Multi-Scale Investigation of Fly Ash Aggregates (FAAs) in Concrete: From Macroscopic Physical-Mechanical Properties to Microscopic Structure of Hydration Products.","authors":"Xue-Fei Chen, Xiu-Cheng Zhang, Ying Peng","doi":"10.3390/ma18112651","DOIUrl":"10.3390/ma18112651","url":null,"abstract":"Fly ash aggregates (FAAs) were synthesized via a hydrothermal process, involving the reaction of fly ash and cement at 180 °C under saturated steam conditions. A thorough examination was carried out to evaluate the impact of cement content on the physico-mechanical properties of the resulting FAAs. A comprehensive exploration was undertaken to decipher the mechanisms by which cement modulates the cylinder compressive strength of FAAs, encompassing mineralogical composition, microstructure, insoluble residue content, and loss on ignition. As the cement proportion increased, a concomitant rise in the amount of hydration products was observed, leading to an enhanced filling effect. This, subsequently, resulted in reduced water absorption and increased apparent density of the FAAs. The augmented filling effect of hydration products contributed to a gradual elevation in the cylinder compressive strength of FAAs as cement content escalated from 5 to 35 wt%. However, a significant transition occurred when cement content surpassed 35%, reaching 35-45 wt%. Within this range, the micro-aggregate effect was diminished, causing a decrease in cylinder compressive strength. The optimal equilibrium between the filling effect and micro-aggregate effect was attained at 35 wt% cement content, where the cylinder compressive strength of FAAs reached its peak value of 18.5 MPa. This research is expected to provide a feasible approach for solid waste reduction, with a particular emphasis on the utilization of fly ash.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156800/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NO_x-Free Leaching Methods for Efficient Silver and Aluminium Recovery from Crystalline Silicon Solar Cells. 从晶体硅太阳能电池中高效回收银和铝的无氧化浸出方法。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112668

Aistis Rapolas Zubas, Egidijus Griškonis, Gintaras Denafas, Vidas Makarevičius, Rita Kriūkienė, Jolita Kruopienė

{"title":"NOx-Free Leaching Methods for Efficient Silver and Aluminium Recovery from Crystalline Silicon Solar Cells.","authors":"Aistis Rapolas Zubas, Egidijus Griškonis, Gintaras Denafas, Vidas Makarevičius, Rita Kriūkienė, Jolita Kruopienė","doi":"10.3390/ma18112668","DOIUrl":"10.3390/ma18112668","url":null,"abstract":"As photovoltaic (PV) installations expand globally, effective recycling of end-of-life crystalline silicon solar cells has become increasingly important, including the recovery of valuable metals such as silver (Ag) and aluminium (Al). Traditional nitric acid-based chemical leaching methods, although effective, present environmental challenges due to the generation of hazardous nitrogen oxide (NOx) emissions. To address these concerns, this study investigated alternative hydrometallurgical leaching strategies. Two selective treatments (NaOH for Al, and NH3 + H2O2 for Ag) and one simultaneous treatment (HNO3 + H2O2) were evaluated for metal recovery efficiency. All methods demonstrated high recovery efficiencies, achieving at least 99% for both metals within 60 min. The investigated methods effectively suppressed NOx emissions without compromising leaching efficiency. These findings confirm that hydrometallurgical leaching techniques incorporating hydrogen peroxide can achieve efficient and environmentally safer recovery of silver and aluminium from solar cells, providing valuable insights into the development of more sustainable recycling practices for photovoltaic waste management.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156893/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","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 Engineered Synthesis and Enhancement of Nitrogen and Chlorine Co-Doped Fluorescent Carbon Dots for the Sensitive Detection of Quercetin. 氮氯共掺杂荧光碳点的工程合成及增强对槲皮素的灵敏检测。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112669

Yuan Jiao, Xuewen Miao, Lizhang Wang, Shasha Hong, Yifang Gao, Xin Wang

{"title":"The Engineered Synthesis and Enhancement of Nitrogen and Chlorine Co-Doped Fluorescent Carbon Dots for the Sensitive Detection of Quercetin.","authors":"Yuan Jiao, Xuewen Miao, Lizhang Wang, Shasha Hong, Yifang Gao, Xin Wang","doi":"10.3390/ma18112669","DOIUrl":"10.3390/ma18112669","url":null,"abstract":"Flavonoid alcohols, particularly quercetin, as emerging antioxidants, demand advanced detection methodologies to comprehensively explore and evaluate their potential environmental and health risks. In this study, nitrogen-chlorine co-doped carbon dots (N, Cl-CDs), featuring an extended wavelength emission at 625 nm, were synthesized via the reaction of 4-chloro-1,2-phenylenediamine with polyethyleneimine. The engineered N, Cl-CDs exhibit superior photostability, exceptional aqueous dispersibility, and anti-interference capability in complex matrices. Leveraging static electron transfer mechanisms, the N, Cl-CDs demonstrate selective fluorescence quenching toward quercetin with an ultralow detection limit of 60.42 nM. Validation through rigorous spiked recovery assays in apple peel and red wine has been proficiently performed with satisfactory accuracy, highlighting the significant prospect of the constructed N, Cl-CDs for quercetin identification in real samples. This study provides valuable insights into the analytical determination of flavonoid compounds in complex environmental matrices, highlighting the potential of N, Cl-CDs for environmental and food safety monitoring.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12155965/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative LCA Analysis of Selected Recycling Methods for Carbon Fibers and Socio-Economic Analysis. 碳纤维回收方法的比较LCA分析与社会经济分析。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112660

Nikolina Poranek, Krzysztof Pikoń, Natalia Generowicz-Caba, Maciej Mańka, Joanna Kulczycka, Dimitrios Marinis, Ergina Farsari, Eleftherios Amanatides, Anna Lewandowska, Marcin Sajdak, Sebastian Werle, Szymon Sobek

{"title":"Comparative LCA Analysis of Selected Recycling Methods for Carbon Fibers and Socio-Economic Analysis.","authors":"Nikolina Poranek, Krzysztof Pikoń, Natalia Generowicz-Caba, Maciej Mańka, Joanna Kulczycka, Dimitrios Marinis, Ergina Farsari, Eleftherios Amanatides, Anna Lewandowska, Marcin Sajdak, Sebastian Werle, Szymon Sobek","doi":"10.3390/ma18112660","DOIUrl":"10.3390/ma18112660","url":null,"abstract":"Carbon fiber is essential in many industries. Since primary production is highly energy-intensive, recycling technologies are being sought. A goal of the research was to develop at a laboratory scale a chemical recycling method aimed at recovering carbon fiber. Two variants of the method have been established and environmentally compared with a primary production version.Methods: The life cycle assessment methodology has been used to assess and quantify the environmental impacts. The cradle to gate analysis was performed with the functional unit defined as a production of 1 kg of carbon fiber.Results: The best environmental option turned out to be a developed chemical recycling technology named Scenario 1. It is a solvolysis performed using an ambient-pressure-operated batch reactor connected to a reflux condenser and an inert gas supply tank, using an ethylene glycol and potassium hydroxide solution. The worst case appeared to be the second variant of the chemical recycling, named Scenario 2 (plasma-enhanced nitric acid solvolysis).Conclusions: In Scenario 1, a production of the ethylene glycol was recognized as a key environmental driver, while in Scenarios 2 and 3 the energy-related impact was the most influential.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156226/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Mesoporous Alumina with High Specific Surface Area via Reverse Precipitation Method for Enhanced Adsorption and Regeneration of Congo Red. 反沉淀法合成高比表面积介孔氧化铝增强刚果红的吸附和再生。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112656

Shuaiqi Chen, Ziqiang Zhao, Boning Jiang, Yuanchao Zhang, Xuhui Wang, Xiangyu Xu, Jiaqing Song

{"title":"Synthesis of Mesoporous Alumina with High Specific Surface Area via Reverse Precipitation Method for Enhanced Adsorption and Regeneration of Congo Red.","authors":"Shuaiqi Chen, Ziqiang Zhao, Boning Jiang, Yuanchao Zhang, Xuhui Wang, Xiangyu Xu, Jiaqing Song","doi":"10.3390/ma18112656","DOIUrl":"10.3390/ma18112656","url":null,"abstract":"Various forms of alumina have attracted considerable attention for their ability to remove anionic dyes from wastewater, attributed to their high specific surface area, and environmental safety. In this study, a series of modified alumina materials were synthesized for the first time using the reverse precipitation method with dual aluminum sources and without template agent to explore their applicability in various scenarios, including adsorption processes and regeneration cycles. The results revealed that non-modified alumina exhibited superior adsorption properties, while silicon-modified alumina demonstrated exceptional thermal stability during high temperature calcination. For silicon-modified alumina, the replacement of some Al-OH groups with silicon resulted in the formation of a protective silicon layer on the alumina surface, which delayed the sintering process. The pseudo-second-order kinetic model and Langmuir model were utilized to fit the experimental data. Furthermore, the adsorption and regeneration properties of silicon-modified alumina were investigated, revealing a maximum equilibrium adsorption capacity of 822.6 mg/g for Congo Red using non-modified alumina. Notably, the non-modified alumina demonstrated a 40.6% increase in its adsorption capacity compared to its initial capacity after six regeneration cycles at 1000 °C.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12155924/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods for Quantitative Determination of Iron Sulfides in Rocks. 岩石中硫化铁的定量测定方法。

IF 3.1 3区材料科学

Materials Pub Date : 2025-06-05 DOI: 10.3390/ma18112647

Zhixin Wang, Shaoping Wang, Wei Li, Bing Cao, Xiaojun Huang, Xin Chuai, Xinyu Zhang, Min Deng

{"title":"Methods for Quantitative Determination of Iron Sulfides in Rocks.","authors":"Zhixin Wang, Shaoping Wang, Wei Li, Bing Cao, Xiaojun Huang, Xin Chuai, Xinyu Zhang, Min Deng","doi":"10.3390/ma18112647","DOIUrl":"10.3390/ma18112647","url":null,"abstract":"When iron sulfides are used as aggregate in concrete production, it easily oxidizes to form harmful substances such as sulfates. This results in acid corrosion and internal sulfate attack (ISA), significantly reducing concrete durability. To date, the quantification methods for iron sulfides in aggregates remain inaccurate, often neglecting pyrrhotite (a type of iron sulfide). No standardized methods or threshold values for the sulfide content in aggregates have been established, nor have technical guidelines for the application of sulfide-containing aggregates, limiting their use. This study proposes an on-site quantification procedure for determining the pyrite and pyrrhotite content in tailings using a selective chemical dissolution process. An orthogonal experiment was designed to determine the optimal dissolution conditions by considering four factors: particle size, reaction temperature, acid concentration, and reaction time. The pyrrhotite quantification method showed a relative standard deviation (RSD) of 3.60% (<5%) and a mean relative error of 3.19% (<5%), while the pyrite quantification method showed an RSD of 3.11% (<5%) with a mean relative error of 4.70% (<5%). The results were further optimized under engineering conditions to reduce costs and enable on-site quantification without relying on complex precision instruments. The quantitative results of pyrite in mineral samples were verified by the XRD internal standard method, and the error was less than 0.6%. This approach ensures the effective monitoring and management of sulfide content in concrete aggregates, promoting the practical application of sulfur-bearing aggregates.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 11","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12156825/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144285312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0