Cleaner Materials最新文献

{"title":"Optimizing double-layer rubber composites for eco-friendly laminates: A thermal-mechanical characterization","authors":"Thanwit Naemsai ,&nbsp;Chatree Homkhiew ,&nbsp;Theerawat Petdee ,&nbsp;Chainarong Srivabut","doi":"10.1016/j.clema.2024.100290","DOIUrl":"10.1016/j.clema.2024.100290","url":null,"abstract":"<div><div>This study investigated the optimal design of double-layer rubber composites for eco-friendly laminates. A comprehensive methodology was used, combining material selection, manufacturing processes, and structural optimization to create composites with improved conductivity, strength, durability, and environmental sustainability. The Box-Behnken design methodology was utilized to optimize the formulation of these composites, yielding an optimal solution characterized by a desirability score of 0.714. This optimal formulation consists of a blowing agent content of 12 parts per hundred rubber (phr), wood sawdust content of 80 phr, and a processing temperature of 110 °C. The projected performance characteristics for this optimal composite formulation include a thermal conductivity of 0.023 watts per meter-kelvin (W/mK), a peeling force of 0.728 kN, a puncture force of 97.84 N, and a shearing force of 0.344 kN. Furthermore, an analysis of dimensionless parameters identified a favorable thickness ratio of 0.5 for the double-layer laminate wall panels, which corresponds to a total thickness of 10 mm. This finding is consistent with the principles of green building, facilitating resource efficiency. By adopting a holistic design approach, this study demonstrates a viable strategy for developing high-performance and sustainable double-layer rubber composites tailored for eco-friendly laminates, thus contributing to advancements in green building solutions.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100290"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Waste plastic management: Recycling and the environmental health nexus","authors":"Sodiq Adeyeye Nafiu ,&nbsp;Musa O. Azeez ,&nbsp;Khaled M. AlAqad ,&nbsp;Taofiq Abdulraheem Olarewaju ,&nbsp;Emmanuel Amuntse Yerima ,&nbsp;Abdulkadir Tanimu","doi":"10.1016/j.clema.2024.100291","DOIUrl":"10.1016/j.clema.2024.100291","url":null,"abstract":"<div><div>The increasing production of plastic materials and their subsequent disposal as waste have necessitated the development of effective waste management strategies. Among various approaches, the recycling of plastic waste has gained significant attention as an environmentally friendly alternative to landfilling and incineration. This manuscript explores the different methods of plastic recycling and their associated environmental and health impacts. Despite its economic advantages, mechanical recycling poses environmental and health risks, particularly due to the release of microplastics. These microplastics can contaminate the environment and enter the<!--> <!-->human body through inhalation and ingestion, leading to potential health hazards. Thus, strategies for mitigating microplastic pollution, including advanced sorting technologies and the implementation of IoT and RFID systems for efficient waste management were discussed. Furthermore, the environmental impacts of chemical recycling processes, especially concerning toxic chemical additives and greenhouse gas emissions, are examined. The findings highlight the need for improved waste management practices and the adoption of mitigation measures to reduce the environmental footprint of plastic waste recycling and promote public health.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100291"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recycling of mine tailings as supplementary cementitious material: Impact of mine tailings’ mineralogy on hydration behaviour and phase assemblage of Ordinary Portland cement blends","authors":"Godfrey Mawire ,&nbsp;Robbie McDonald ,&nbsp;Peter Austin ,&nbsp;Abhijit Mukherjee ,&nbsp;Lionel Esteban ,&nbsp;Navdeep K Dhami","doi":"10.1016/j.clema.2024.100288","DOIUrl":"10.1016/j.clema.2024.100288","url":null,"abstract":"<div><div>This study investigated the influence of mineral tailings’ mineralogy on hydration behaviour and phase assemblage of cured cement in ternary blends comprising Ordinary Portland cement (OPC), blast furnace slag (BFS) and tailings. The identification and quantification of mineral phases was achieved through Quantitative X-ray diffraction (QXRD) analysis, while the evaluation of mineral thermal stability was conducted using thermogravimetric analysis with mass spectrometry (TGA-MS). Isothermal calorimetry revealed that the tailings influenced the OPC heat flow profile during early-stage hydration, with minerals like dehydroxylated Fe-chlorite and alunite hydraulic properties contributing to the early-stage reaction mechanism. The bulk slow-reacting minerals in the tailings affected both the phase assemblage and the hydration mechanism of OPC by releasing elemental species that could be incorporated in the C-S-H phases. The chemical composition of the C-S-H formed in the blended cement varied and had a low Ca/Si ratio &lt; 1.3, enabling guest elements to be incorporated. Correlative Electron Microscopy Automated Mineralogy (CEM-AM) was utilised to analyse and map the distribution of the secondary C-S-H phases within the paste matrix. The findings give insight into the nature of hydrates formed in a ternary blend with tailings, which directly affect the cured cement’s performance and service life properties.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100288"},"PeriodicalIF":0.0,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and property study of geopolymer composite fireproof coating with PVA fiber and manganese slag","authors":"Zhenyu Zhou ,&nbsp;Chenxi Zeng ,&nbsp;Hongqing Wei ,&nbsp;Yanhuai Ding","doi":"10.1016/j.clema.2024.100289","DOIUrl":"10.1016/j.clema.2024.100289","url":null,"abstract":"<div><div>Geopolymers have garnered widespread attention due to their excellent mechanical properties, durability, and fire resistance. In this paper, we have conducted the design of a geopolymer coating, incorporating a specific proportion of solid waste manganese slag and polyvinyl alcohol (PVA) fibers. The geopolymer serves to stabilize the manganese slag, while the PVA fibers enhance the mechanical properties of the coating. The results demonstrate that the composite geopolymer coating becomes dense at high temperatures, exhibiting outstanding fire-resistant characteristics. Furthermore, the coating significantly enhances the mechanical performance of wood specimens, indicating promising application prospects in the field of building material fire protection.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100289"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functionalized biochar from vegetable waste for phosphorus removal from aqueous solution and its potential use as a slow-release fertilizer","authors":"Rajesh Chanda ,&nbsp;Toslim Jahid ,&nbsp;Anik Karmokar ,&nbsp;Bejoy Hossain ,&nbsp;Md. Moktadir ,&nbsp;Md. Saiful Islam ,&nbsp;Nirupam Aich ,&nbsp;Biplob Kumar Biswas","doi":"10.1016/j.clema.2024.100287","DOIUrl":"10.1016/j.clema.2024.100287","url":null,"abstract":"<div><div>Agricultural runoff of phosphorus leads to the loss of this critical nutrient into the waterbodies and causes environmental problems like eutrophication. To tackle the growing concern, functionalized biochar as an adsorbent provides a sustainable method to capture the phosphorus from wastewater. Additionally, the P-laden biochar as a slow-release fertilizer improves plant nutrient uptake and crop yield. In this work, metal chloride-doped biochar derived from non-edible vegetable waste was prepared and applied as an adsorbent. Zinc chloride-doped biochar (ZBC) showed a better phosphorus adsorption capacity of 47.83 mg/g among the prepared biochar. The desorption study suggested that around 42 % of total adsorbed P was released within 336 h. The growth of mung plants over 70 days was monitored, along with mung bean yield, to assess the effectiveness of P-laden ZBC as a slow-release phosphorus fertilizer. The presented approach of non-edible waste valorization into slow-release fertilizer could contribute to tackling nutrient depletion and achieving a circular economy.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100287"},"PeriodicalIF":0.0,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The engineering performance of EICP-modified municipal solid waste incineration bottom ash for road construction","authors":"Zeng Yuan ,&nbsp;Tingjun Wu ,&nbsp;Linbing Wang ,&nbsp;Yucheng Huang ,&nbsp;Qiang Tang","doi":"10.1016/j.clema.2024.100285","DOIUrl":"10.1016/j.clema.2024.100285","url":null,"abstract":"<div><div>Municipal solid waste incineration bottom ash (MSWIBA) emerges as a potential alternative to natural aggregates due to its similar mineral composition and engineering properties as embanking fillings. However, the instability and environmental pollution risks of MSWIBA limit its large-scale application. This study proposes to employ Enzyme Induced Carbonate Precipitation (EICP) technology to enhance the mechanical properties of MSWIBA and reduce its environmental impact. Initial analyses focused on the basic physicochemical properties and morphological changes of MSWIBA before and after modification. Then the modified MSWIBA exhibited improvements in shear resistance, resilient modulus, and permanent deformation behavior. It was also found that existing resilient modulus and permanent deformation predicting models for soils are applicable to EICP-modified MSWIBA. The column leaching tests were conducted on samples subjected and not subjected to freeze–thaw and dry-wet cycles. The results revealed the modified MSWIBA released reduced heavy metal concentrations in both water and acid leaches. These findings establish a solid theoretical foundation for employing EICP-modified MSWIBA as an embankment fill material, highlighting the potential for wider adoption of this eco-friendly alternative in road constructions.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100285"},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strength, pore and corrosion characteristics of ceramic insulator powder-silica fume based ternary blended mortar","authors":"Sumrerng Rukzon ,&nbsp;Suthon Rungruang ,&nbsp;Udomvit Chaisakulkiet ,&nbsp;Patcharapol Posi ,&nbsp;Prinya Chindaprasirt","doi":"10.1016/j.clema.2024.100284","DOIUrl":"10.1016/j.clema.2024.100284","url":null,"abstract":"<div><div>This study investigates the compressive strength, porosity, water absorption, chloride penetration, and corrosion resistance of mortar in a ternary blended cementitious system that substitutes Portland Cement Type 1 (PCT) with varying proportions (15%, 20%, 25%, 30%, and 40%) of finely ground ceramic electrical insulator (CE) and silica fume (SF). To enhance the workability of the mortar, a superplasticizer (SP) was used, maintaining a consistent water-to-binder ratio (W/B) of 0.50. SEM-EDS microstructural analysis revealed a homogeneous composition with a high content of calcium silicate hydrate (C-S-H) gel, particularly notable in samples combining CE and SF. The incorporation of 5% to 20% by weight of CE and SF into the cementitious materials resulted in mortars that exhibited superior compressive strength compared to both the control sample and those containing only 10% SF. The use of very fine CE and SF also improved the mortars’ properties in terms of water absorption and chloride penetration. Furthermore, the addition of CE and SF significantly enhanced the mortar’s porosity and increased its corrosion resistance. These findings demonstrate the viability of ground ceramic electrical insulators as a cementitious material and emphasize the environmental benefits of reducing waste and alleviating disposal burdens by repurposing industrial by-products.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"15 ","pages":"Article 100284"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single fiber tensile strength of seagrasses and the development and characterization of Zostera marina-based medium density boards","authors":"Aldi Kuqo ,&nbsp;Aldo Joao Cárdenas-Oscanoa ,&nbsp;Carsten Mai","doi":"10.1016/j.clema.2024.100283","DOIUrl":"10.1016/j.clema.2024.100283","url":null,"abstract":"<div><div>This study investigates the potential of the leaves of the seagrass <em>Zostera marina</em> (ZM) as an alternative raw material for the production medium-density boards. In the first part, the tensile strength properties of various types of seagrasses were investigated. <em>Posidonia oceanica</em> fibers (POF) exhibited a mean tensile strength of up to 123 MPa, while its leaves (POL) reached up to 27 <!--> <!-->MPa. The ZM leaves also showed a similar tensile strength to <em>Posidonia oceanica</em> leaves, 22.9 MPa. In the second part, ZM leaves and wood fibers (WF) are further processed to produce medium density boards with densities ranging from 500 to 700 kg<!--> <!-->m⁻³. The boards were evaluated for fire resistance, thermal conductivity, mechanical strength, and water resistance-related properties. ZM-boards demonstrated high fire resistance and lower thermal conductivity compared to boards based on wood fiber (WF), i.e. medium density fiberboards (MDF), of similar density. However, due to the low tensile strength and unique morphology of the seagrass leaves, ZM-boards display a lower flexural strength (up to 10.9 MPa) and lower resistance to water absorption compared to boards produced from wood fibers (WF). Boards made by <em>Zostera marina</em> can be a promising alternative to commercial MDF panels especially for interior applications prioritizing fire protection and thermal insulation but they are mainly suited for non-structural uses. Further examination of its acoustic properties would assess its potential applications as sound-absorbing architectural panels.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"14 ","pages":"Article 100283"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental study of asphalt mixtures with recycled resources: Influence of electric arc furnace slag aggregate roughness and bitumen film thickness on fatigue performance","authors":"Dario Benavides,&nbsp;Teresa López-Montero,&nbsp;Marilda Barra Bizinotto,&nbsp;Diego Aponte","doi":"10.1016/j.clema.2024.100282","DOIUrl":"10.1016/j.clema.2024.100282","url":null,"abstract":"<div><div>Electric arc furnace slag (EAFS) is a viable alternative in asphalt mixtures due to its favourable mechanical properties. This study examines the impact of EAFS content and bitumen film thickness (<em>TF</em>) on the fatigue performance of asphalt mixtures. Mixtures with varying levels of EAFS replacement were designed, and their mechanical properties were evaluated through indirect tensile strength and stiffness tests, followed by fatigue tests using the four-point bending method and EBADE (Strain Sweep Test). The results indicated that mixtures with EAFS exhibited increased stiffness, but fatigue performance decreased at high strain levels. At low strain levels, EAFS mixtures performed similarly or better than the control. HMA_GL had the highest <em>TF</em> (13.97 μm), followed by HMA_GS (13.60 μm), HMA_SL (12.66 μm), and HMA_SS (11.77 μm), showing that as the EAFS content increases, the <em>TF</em> decreases. This finding was verified through Digital Image Analysis. This decrease in <em>TF</em> is due to the high porosity and roughness of the EAFS, which in turn reduces the effective bitumen (P_be) in the mixture. HMA_SL*, with a <em>TF</em> equal to the control, demonstrated a 22 % improvement in fatigue performance compared to HMA_SL. In the EBADE tests, HMA_GL achieved 44.69 MJ/m³ of dissipated energy, HMA_GS 31.55 MJ/m³, HMA_SL 34.45 MJ/m³, and HMA_SS 35.54 MJ/m³. The improved HMA_SL* recorded 42.15 MJ/m³, nearly matching the control. EBADE results confirmed that higher EAFS content increased initial stiffness, but the complex modulus (|<em>E*</em>|) decreased more rapidly as deformation increased. These results are consistent with the stiffness tests. These findings suggest that EAFS can successfully replace natural aggregates in asphalt mixtures, with a moderate increase in bitumen content recommended to improve fatigue performance.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"14 ","pages":"Article 100282"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Agro-industrial waste utilization in air-cured alkali-activated pavement composites: Properties, micro-structural insights and life cycle impacts","authors":"Shriram Marathe ,&nbsp;Akhila Sheshadri ,&nbsp;Łukasz Sadowski","doi":"10.1016/j.clema.2024.100281","DOIUrl":"10.1016/j.clema.2024.100281","url":null,"abstract":"<div><div>This study investigates the development and performance of agro-industrial waste-based air-cured alkali-activated concrete composites (AC) for sustainable high-strength rigid pavement applications. The calculated amounts of liquid sodium silicate and sodium hydroxide flakes were used with an adequate quantity of water to prepare the alkali-activator solution. Agro-Industrial by-products, including ground granulated blast furnace slag (GGBS), construction and demolition (C&amp;D) waste, and sugarcane bagasse ash (SBA), were utilized to develop AC mixes and the mechanical properties, micro-structural behaviour, and life cycle impacts were studied. Optimized AC mixes containing 50% recycled aggregates (RCA) (with 50% natural coarse aggregates) and 15% SBA (with 85% GGBS) demonstrated superior compressive, splitting-tensile, and flexural strength, while significantly reducing embodied energy and carbon emissions. Microstructural analysis through XRD, SEM, EDAX, and TGA confirmed the formation of stable alumino-silicate hydrate phases, contributing to enhanced mechanical strength performances. The life cycle analysis results indicated considerable environmental benefits compared to traditional Portland Cement based pavement concrete counterparts. This research presents a sustainable solution for pavement infrastructure, aligning with circular economy principles by promoting the reduction of resource consumption and greenhouse gas emissions.</div></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"14 ","pages":"Article 100281"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}