Journal of Material Cycles and Waste Management最新文献_第3页

Durability of steel slag as railway ballast under freezing–thawing and salt crystallization weathering 钢渣铁路道砟在冻融和盐结晶风化作用下的耐久性研究

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-27 DOI: 10.1007/s10163-025-02215-6

Mehdi Torabi-Kaveh, Eshaqali Mohammadi, Hamid Mehrnahad

{"title":"Durability of steel slag as railway ballast under freezing–thawing and salt crystallization weathering","authors":"Mehdi Torabi-Kaveh, Eshaqali Mohammadi, Hamid Mehrnahad","doi":"10.1007/s10163-025-02215-6","DOIUrl":"10.1007/s10163-025-02215-6","url":null,"abstract":"<div><p>This study aimed to assess the suitability of steel slag (SS) as railway ballast in Yazd province, Iran. Quantitative tests and comparisons with international standards evaluated SS’s effectiveness against freezing–thawing (F–T) and salt crystallization (S-C) weathering. The findings revealed that SS was rich in CaO, Fe<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, MgO, and Al<sub>2</sub>O<sub>3</sub>, which contributed to alkalinity, stability, and durability. However, increasing weathering cycles significantly impacted density, with a 42% decrease after 35 S-C cycles and a 12% loss after 45 F–T cycles. Los Angeles abrasion tests revealed increased abrasion with higher F–T cycles, attributed to ice crystallization in pores. Similarly, magnesium sulfate cycles elevated abrasion from 6.18 to 17.3%, impacting performance though remaining within permissible limits. Weathering also significantly compromised SS strength, with the point load index dropping from 8.4 to 2.4 MPa after 45 F–T cycles and 1.86 MPa after 35 S-C cycles, potentially impacting track stability and safety. Notably, salt crystallization presented a greater threat, potentially leading to fine formation and drainage problems. In conclusion, although SS initially appears to meet certain ballast requirements, its long-term vulnerability to weathering conditions raises significant concerns regarding its suitability for critical railway applications in environments with a climate prone to weathering.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1723 - 1736"},"PeriodicalIF":2.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measuring eco-productivity in the management of municipal solid waste: a parametric approach 测量城市固体废物管理中的生态生产力：参数化方法

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-25 DOI: 10.1007/s10163-025-02193-9

Alexandros Maziotis, Ramon Sala-Garrido, Manuel Mocholi-Arce, Maria Molinos-Senante

{"title":"Measuring eco-productivity in the management of municipal solid waste: a parametric approach","authors":"Alexandros Maziotis, Ramon Sala-Garrido, Manuel Mocholi-Arce, Maria Molinos-Senante","doi":"10.1007/s10163-025-02193-9","DOIUrl":"10.1007/s10163-025-02193-9","url":null,"abstract":"<div><p>Within the context of the circular economy, improving the eco-efficiency (EE) in the management of municipal solid waste (MSW) is of paramount importance. For informed decision-making, understanding the dynamics of EE, i.e., eco-productivity change (EPC) and its drivers—efficiency change, technical change and scale change—have revealed as essential. This study evaluates EPC in MSW management using a parametric approach, enabling the quantification of the influence of environmental variables on performance. An empirical application was developed for a sample of 98 Chilean municipalities from 2015 to 2019. Average EE was 0.796 revealing a good environmental performance of municipalities in managing MSW. Nevertheless, a total of 1,191,841 tons of unsorted waste per year could be recycled if municipalities were eco-efficient. The assessment of EPC identified two sub-periods. From 2015 to 2017, the average EPC was 0.907 indicating a regression in the eco-productivity of 9.3% per year. Between 2017 and 2019 with an average EPC of 1.137, i.e., an improvement of 13.7% per year on eco-productivity. This was due to the positive contribution of eco-technical change and eco-scale efficiency change, whereas EE change remained constant. Moreover, relevant differences in EPC at regional level were found.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1506 - 1519"},"PeriodicalIF":2.7,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Waste of fruits and vegetables in retail: cause, destination and reduction strategies 零售中水果和蔬菜的浪费：原因、目的和减少策略

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-22 DOI: 10.1007/s10163-025-02205-8

Thais Pereira da Silva, Brunna Paulino Sampaio Castro, Nayhanne Gomes Cordeiro, Amanda Cristina de Souza Andrade, Aline Cristine Souza Lopes, Bruna Vieira de Lima Costa

{"title":"Waste of fruits and vegetables in retail: cause, destination and reduction strategies","authors":"Thais Pereira da Silva, Brunna Paulino Sampaio Castro, Nayhanne Gomes Cordeiro, Amanda Cristina de Souza Andrade, Aline Cristine Souza Lopes, Bruna Vieira de Lima Costa","doi":"10.1007/s10163-025-02205-8","DOIUrl":"10.1007/s10163-025-02205-8","url":null,"abstract":"<div><p>To analyze the cause of, destination of and strategies used to reduce fruit and vegetable (FV) waste in establishments in a Brazilian metropolis. Cross-sectional design study was carried out in areas with and without public Food and Nutrition Public Establishment (FNPE) in the city of Belo Horizonte, Brazil. Variables related to the cause of, destination of and strategies used to reduce the waste were investigated using Fisher's exact test and Holm-Bonferroni tests. More than half of the establishments reported the occurrence of waste of FV (55.4%), being higher in private specialized fresh food market indoor (55.7%) and FNPE (20.3%). The main causes were excessive handling by the consumer (30.1%), poor environmental conditions in the establishment (28.6%) and excessive purchase (15.0%). As for the destination, it was observed that the majority donated (46.2%) or disposal (36.8%). And the main strategies were stock control (40.4%) and the purchase of regional FV (37.6%). The occurrence of waste was high, mainly in private specialized fresh food market indoor and in FNPE, and the causes were related to the consumer and the establishment. Food waste donation and disposal were the main destinations. Stock control and purchase of regional FV were the main strategies.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1626 - 1636"},"PeriodicalIF":2.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing sustainability of municipal solid waste management: ward-based approach as a governance framework in Dhaka City 加强城市固体废物管理的可持续性：作为达卡市治理框架的ward-based方法

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-21 DOI: 10.1007/s10163-025-02200-z

Md. Shoriful Alam Mondal, Hidetoshi Kitawaki

{"title":"Enhancing sustainability of municipal solid waste management: ward-based approach as a governance framework in Dhaka City","authors":"Md. Shoriful Alam Mondal, Hidetoshi Kitawaki","doi":"10.1007/s10163-025-02200-z","DOIUrl":"10.1007/s10163-025-02200-z","url":null,"abstract":"<div><p>Rapid urbanization and high population density have intensified the challenges of municipal solid waste management (SWM) in Dhaka, a megacity where effective governance is a critical factor. This paper presents a good governance framework, ward-based approach (WBA) and explores its sustainability potential towards SWM. WBA has been modeled and implemented for over a decade in the collection phase. In-depth interviews of the experts, surveys, document reviews were conducted and then employed triangulation to analyze and cross-validate the information, providing deeper insights into WBA. The contributions of WBA were examined to purposively select three aspects of SWM sustainability: (a) feasibility of waste-to-energy incineration, (b) achievement of local sustainable development goals (SDGs) and (c) compliance with the national SWM Rules. This paper argues that WBA demonstrates a promising governance framework to enhance sustainability of SWM. However, the inherent operational challenges of WBA may hinder the success unless tackled carefully.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1587 - 1606"},"PeriodicalIF":2.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Market vendor involvement in the rotary bio-waste composter design: the case of Baguio City, Philippines 市场供应商参与旋转式生物垃圾堆肥设计：菲律宾碧瑶市案例

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-21 DOI: 10.1007/s10163-025-02208-5

Jeffrey Z. Duran, Paul Josef B. Tabra, Marcelino N. Lunag Jr., Jessie C. Elauria, Juanito D. Burguillos

{"title":"Market vendor involvement in the rotary bio-waste composter design: the case of Baguio City, Philippines","authors":"Jeffrey Z. Duran, Paul Josef B. Tabra, Marcelino N. Lunag Jr., Jessie C. Elauria, Juanito D. Burguillos","doi":"10.1007/s10163-025-02208-5","DOIUrl":"10.1007/s10163-025-02208-5","url":null,"abstract":"<div><p>Bio-waste generation in public markets is affected by the influx of people coming in due to the variety of products available. However, a large volume of these products often gets spoiled on-site. While there is a plethora of research on management schemes for bio-wastes, limited studies address the design of composters for market wastes. Thus, this study was conducted to develop a bio-waste composter involving the knowledge, attitude, and perception of market vendors. Through the participation of 225 market vendors that have responded in the survey, it was revealed that there is a low level of compliance with composting activity in the market, despite the majority of the participants manifesting knowledge of the open composting method. The design of a rotary composter was conceptualized based on the participants’ perception, which focused on essential components of natural decomposition, such as aeration, mixing, odor control, and temperature. Finally, a waste management framework was constructed that is geared towards a circular economy at the micro-scale level to realize the potential of this study. Indeed, the conducted study yielded an interesting interchange of the participants’ knowledge, attitude, and perception that have led to the development of a waste management system using simple methods.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1962 - 1983"},"PeriodicalIF":2.7,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biochar-based solutions for sustainable dye treatment and agricultural waste management 可持续染料处理和农业废物管理的生物炭解决方案

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-19 DOI: 10.1007/s10163-025-02201-y

Shivani Garg, Nelson Pynadathu Rumjit, Pooja Arora, Shakeel Ahmed

{"title":"Biochar-based solutions for sustainable dye treatment and agricultural waste management","authors":"Shivani Garg, Nelson Pynadathu Rumjit, Pooja Arora, Shakeel Ahmed","doi":"10.1007/s10163-025-02201-y","DOIUrl":"10.1007/s10163-025-02201-y","url":null,"abstract":"<div><p>The growing concern over environmental pollution from industrial dye effluents necessitates the development of sustainable and efficient treatment methods. Biochar, a carbon-rich material derived from agricultural residues, presents a promising solution for dye adsorption and agricultural waste management. This study highlights the properties of biochar that make it an ideal sorbent for dye adsorption and examines how feedstock quality, pyrolysis conditions, and surface characteristics influence the adsorption capacity. The studies demonstrate that biochar can efficiently remove various synthetic dyes from aqueous solutions, with adsorption depending on the surface area, pore size, and functional group. In addition to dye removal, the utilization of agricultural residues for biochar production offers dual benefits of waste management and environmental remediation. Biochar provides a cost-effective and eco-friendly alternative to conventional adsorbents, promoting circular economic practices. This paper offers a comprehensive analysis of biochar’s applications, benefits, and challenges in dye treatment and waste management, emphasizing its role in achieving sustainability.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1283 - 1301"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10163-025-02201-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a digital twin and fuzzy logic controller for competitive pricing of recyclables in urban waste management: a case study of Kerman, Iran 开发用于城市废物管理中可回收物竞争性定价的数字孪生和模糊逻辑控制器：伊朗克尔曼案例研究

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-17 DOI: 10.1007/s10163-025-02202-x

Mohammad Ali Bagherzadeh, Hossein Vahidi

{"title":"Development of a digital twin and fuzzy logic controller for competitive pricing of recyclables in urban waste management: a case study of Kerman, Iran","authors":"Mohammad Ali Bagherzadeh, Hossein Vahidi","doi":"10.1007/s10163-025-02202-x","DOIUrl":"10.1007/s10163-025-02202-x","url":null,"abstract":"<div><p>This study introduces an innovative approach to urban waste management in Kerman, Iran, by developing a small-scale digital twin and a fuzzy logic decision support system. The primary goal is to bridge the gap between formal and informal recycling sectors and integrate informal collectors into the formal system. The model, created in MATLAB, integrates both sectors, providing a comprehensive view of stakeholder interactions. By combining \"modeling\" and \"system identification\" techniques, the model accurately represents the system's dynamics, validated with historical data. A fuzzy logic controller was designed to optimize competitive pricing strategies for recyclable materials and licensing fees, enabling the municipality to compete effectively with informal recycling networks. The digital twin framework provides a comprehensive model for simulating various scenarios. This approach allows policymakers to assess the impact of different pricing and licensing strategies on municipal revenue, participation rates, and overall system efficiency. The results demonstrate that financial licensing and performance-based discounts can significantly enhance the municipality's market share and revenue. This research demonstrates the potential of digital twin technology in creating resilient and responsive waste management systems, offering valuable insights for similar urban challenges.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1607 - 1625"},"PeriodicalIF":2.7,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative life cycle assessment of asphalt mixtures containing recycled concrete aggregate in Egypt 埃及含有再生混凝土骨料的沥青混合料的比较生命周期评估

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-15 DOI: 10.1007/s10163-025-02191-x

D. El-Tahan, A. Gabr, S. Dessouky, S. El-Badawy

{"title":"Comparative life cycle assessment of asphalt mixtures containing recycled concrete aggregate in Egypt","authors":"D. El-Tahan, A. Gabr, S. Dessouky, S. El-Badawy","doi":"10.1007/s10163-025-02191-x","DOIUrl":"10.1007/s10163-025-02191-x","url":null,"abstract":"<div><p>This paper presents a comprehensive life cycle assessment (LCA) for hot mix asphalt (HMA) and warm mix asphalts (WMAs) manufactured using two different technologies. The investigated asphalt mixtures were prepared with recycled concrete aggregates (RCAs) as a replacement for coarse natural aggregates (NAs). The OpenLCA version 1.10.3 software was utilized for modeling the processes analyzed in this study and the life cycle inputs/outputs associated with the functional unit characterized during the life cycle impact assessment phase using the TRACI v.2.1 method. The production cost analysis was then applied to compare the investigated asphalt mixtures. The results showed that the impact of the processes associated with the production of RCA is the best for all the analyzed impact categories than NA. For the asphalt mixture production, the environmental impact of WMA with Sasobit as an organic additive was lower than HMA by 5–10%, while WMA with Asphamin as a synthetic zeolite additive increased the environmental impact values by 4–43%. In terms of production cost, the HMA showed the lowest cost compared to WMA. In addition, the use of RCA as a substitution to NA yielded a slight decrease of up to 4% in the total production of the asphalt mixtures.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1462 - 1477"},"PeriodicalIF":2.7,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Risk assessment of heavy metal contamination in air, water, soil, and crops adjacent to a spent lead-acid battery storage facility 废铅酸电池储存设施附近空气、水、土壤和农作物中重金属污染的风险评估

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-14 DOI: 10.1007/s10163-025-02197-5

Xiaofeng Gao, Yiran Zhou, Siyan Liu, Zihan Bi, Min Jiang, Manli Zhang, Hongying Cai, Xiaoming Wang

{"title":"Risk assessment of heavy metal contamination in air, water, soil, and crops adjacent to a spent lead-acid battery storage facility","authors":"Xiaofeng Gao, Yiran Zhou, Siyan Liu, Zihan Bi, Min Jiang, Manli Zhang, Hongying Cai, Xiaoming Wang","doi":"10.1007/s10163-025-02197-5","DOIUrl":"10.1007/s10163-025-02197-5","url":null,"abstract":"<div><p>China’s recent recognition as the largest producer and consumer of lead-acid batteries (LABs) underscores the need for increased efforts in controlling pollution. Existing environmental risk assessment (ERA) studies are focused on recycling processes, and they often neglect the storage phase of spent LABs. Hence, we delves into ERA near a Chongqing-based storage facility for spent LABs, employing exposure assessment and health risk assessment (HRA). Although the concentrations of heavy metals in the air, surface water, and soil remained below the standard limits, those of Pb, Cr, and As in vegetables surpassed these values. The exposure assessment showed that children's total average daily exposure to heavy metals was 1.36 ~ 1.51 times higher than adults’, primarily through vegetable ingestion. Furthermore, HRA signified that environmental exposure near the spent LAB storage facility posed unacceptable noncarcinogenic and carcinogenic risks for both adults and children. Cr, As, and Sb were the main contributors to noncarcinogenic risk, whereas Cr, Cd, Ni, and As were the main contributors to unacceptable carcinogenic risks. Corroborating the exposure assessment results, vegetable ingestion was the primary exposure route leading to both noncarcinogenic and carcinogenic risks. Overall, this study provides reference information for environmental risk prevention and control during spent LAB storage.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1557 - 1569"},"PeriodicalIF":2.7,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","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 alkali activator Ca(OH)2 on the early performance and hydration process of ferrous extraction tailing of nickel slag–ordinary Portland cement cementitious system 碱活化剂 Ca(OH)2 对镍矿渣-普通硅酸盐水泥胶凝体系的铁提取尾矿早期性能和水化过程的影响

IF 2.7 4区环境科学与生态学

Journal of Material Cycles and Waste Management Pub Date : 2025-03-13 DOI: 10.1007/s10163-025-02198-4

Song Yanning, Qiao Hongxia, Feng Qiong, Wei Chao, Zheng Jianghua

{"title":"Effect of alkali activator Ca(OH)2 on the early performance and hydration process of ferrous extraction tailing of nickel slag–ordinary Portland cement cementitious system","authors":"Song Yanning, Qiao Hongxia, Feng Qiong, Wei Chao, Zheng Jianghua","doi":"10.1007/s10163-025-02198-4","DOIUrl":"10.1007/s10163-025-02198-4","url":null,"abstract":"<div><p>To enhance the initial reactivity of ferrous extraction tailing of nickel slag, this study investigates the impact of Ca(OH)<sub>2</sub> as an alkali activator on the early mechanical properties, microstructure, hydration products, and hydration kinetics of a composite cementitious system comprising FETNS-ordinary Portland cement with varying FETNS proportions. The findings reveal that the addition of Ca(OH)<sub>2</sub> significantly boosts the 3d and 7d compressive strength of the neat paste by up to 51.95% and 45.27%, respectively. The microstructure of the paste at various ages was examined using scanning electron microscopy to provide insights into its development. The integration of Ca(OH)<sub>2</sub>, as evidenced by X-ray diffraction, thermal analysis, and nitrogen adsorption–desorption, enhances early-stage hydration, resulting in increased formation of calcium silicate hydrate and ettringite. These products efficiently seal internal pores and microcracks, bolstering the material’s microstructure. Isothermal calorimetry reveal that adding Ca(OH)<sub>2</sub> markedly accelerates the formation of hydration products and increases heat release during the early stages of the reaction. Finally, the hydration reaction model was developed using Phreeqc, which corroborated the observed trends. The incorporation of Ca(OH)<sub>2</sub> can solve the problem of low early-phase reactivity of FETNS-OPC composite cementitious system, which is conducive to the application of FETNS in building materials.</p></div>","PeriodicalId":643,"journal":{"name":"Journal of Material Cycles and Waste Management","volume":"27 3","pages":"1570 - 1586"},"PeriodicalIF":2.7,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0