Cleaner MaterialsPub Date : 2024-03-01DOI: 10.1016/j.clema.2024.100235
Tamás Gera , Bence Kondász , Tomi Smausz , Judit Kopniczky , Szabolcs Hodovány , Tibor Ajtai , Piroska Szabó-Révész , Rita Ambrus , Ildikó Csóka , Béla Hopp
{"title":"Pulsed laser ablation of polymer-based magnetic nanocomposites for oil spill remediation","authors":"Tamás Gera , Bence Kondász , Tomi Smausz , Judit Kopniczky , Szabolcs Hodovány , Tibor Ajtai , Piroska Szabó-Révész , Rita Ambrus , Ildikó Csóka , Béla Hopp","doi":"10.1016/j.clema.2024.100235","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100235","url":null,"abstract":"<div><p>Oil spills represent a critical environmental threat, particularly to marine ecosystems, necessitating the development of efficient and eco-friendly remediation technologies. This study explores the application of pulsed laser ablation (PLA) in fabricating polymer-based magnetic nanocomposites, with a focus on polyvinylpyrrolidone, chitosan, and methyl cellulose. These polymers, renowned for their proficiency in adsorbing pollutants from various oils, were combined with magnetite nanoparticles (NPs) in a compressed tablet form. The PLA process facilitated the generation of nanocomposites, which were subsequently collected using an external magnetic field. The chemical composition of these composites was analyzed through Fourier-transform infrared (FTIR) and Raman spectroscopy, while particle sizes were determined using the Leica Image Processing and Analysis System. The study revealed that PLA is a green, single-step, and effective technique for preparing magnetic nanocomposites, producing particles predominantly in the 400 nm–4 µm size range. Furthermore, the application of these composites in oil/water separation demonstrated with separation commencing approximately 1 s after the application of a magnetic field. These findings underscore the potential of PLA in crafting magnetic nanocomposites for the rapid and environmentally sustainable remediation of oil spills.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100235"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000194/pdfft?md5=008bd0125369db31d3d37863ca5a79a1&pid=1-s2.0-S2772397624000194-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140030660","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}
Cleaner MaterialsPub Date : 2024-03-01DOI: 10.1016/j.clema.2024.100234
Rafael Robayo–Salazar, Armando Vargas, Fabio Martínez, Ruby Mejía de Gutiérrez
{"title":"Utilization of powders and fine aggregates from the recycling of construction and demolition waste in the 3D printing of Portland-based cementitious materials","authors":"Rafael Robayo–Salazar, Armando Vargas, Fabio Martínez, Ruby Mejía de Gutiérrez","doi":"10.1016/j.clema.2024.100234","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100234","url":null,"abstract":"<div><p>This paper analysed the possibility of using recycled powders (<75 µm) and recycling fine aggregates (<1.18 mm) obtained during the crushing and grinding of concrete waste (CoW), ceramic waste (CeW) and red clay brick waste (RCBW) when designing cementitious pastes and mortars for 3D printing. The effects of the type of powder (CoW-powder, CeW-powder and RCBW-powder) and of the liquid/solid (L/S) ratio on the mixture properties in the fresh and hardened states were studied. In the fresh state, the level of flowability (mini-slump), flow index (flow table), buildability and setting time characteristics of the cementitious pastes were evaluated. In addition, the rheological behaviour was analysed through a rotational rheometer. In the hardened state, the compressive strength was determined at 3, 7, 28 and 90 days. The effects of the type of recycled fine aggregate (RFA − CoW, RFA − CeW and RFA − RCBW) were evaluated for mortars with a cement:aggregate ratio of 1:0.5. Based on the results obtained, the most suitable mixtures were selected to carry out 3D printing tests on a laboratory scale. From the 3D printing of beam-type specimens, it was possible to determine the flexural and compressive strengths (28 days) of the selected mixtures. The results obtained validated the possibility of using recycled powders (CoW, CeW and RCBW) to replace 30 % of ordinary Portland cement (OPC) and to incorporate 100 % recycled fine aggregates in the design of cementitious materials (pastes and mortars) for 3D printing. In this regard, the recycled powders and recycled fine aggregates increase the buildability and thixotropy of cementitious mixtures. With an adjustment in the L/S (liquid/solids) ratio, their application in 3D printing becomes feasible. This alternative for the use of powders and fine aggregates from construction and demolition waste (CDW) could be considered a contribution towards the sustainability of the sector and the implementation of a circular economy.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100234"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000182/pdfft?md5=f659693cc1025f7fbbde563281d18ec1&pid=1-s2.0-S2772397624000182-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140052038","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}
Cleaner MaterialsPub Date : 2024-03-01DOI: 10.1016/j.clema.2024.100230
Shahabodin Rafiei , Ali Habibolahzadeh , Björn Wiese
{"title":"Environment-COnscious magnesium (ECO-Mg): A review","authors":"Shahabodin Rafiei , Ali Habibolahzadeh , Björn Wiese","doi":"10.1016/j.clema.2024.100230","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100230","url":null,"abstract":"<div><p>The significance of Mg (alloy) extends to both the mechanical engineering and medical sectors. However, Mg is known for its high reactivity, posing significant challenges to its widespread utilization in large-scale lightweight applications. Research has shown that adding small amounts of reactive elements, such as Ca, can substantially improve the high-temperature oxidation resistance of numerous Mg alloys. This can diminish the reliance on greenhouse gases with high global warming potential, typically used as protective gases during processing. In a similar vein, the patented Environment-COnscious Mg technology offers distinct advantages by utilizing the cost-effective and more stable oxide form of the desired alloying element, notably alkaline earth metals like Ca, instead of their elemental forms, in the alloying of Mg. This development holds considerable importance in mitigating the carbon footprint throughout manufacturing. While the patents for Environment-COnscious production outline a method employing various versatile oxides, practical application has primarily relied on adding calcium oxide, as indicated by the literature. Therefore, this review brings to light the state of the art concerning the interaction between calcium oxide and molten Mg (alloy), and its influence on the technical properties, potential challenges, and areas requiring further investigation in this field. Until now, this issue has not been discussed from a critical and holistic approach.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100230"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000145/pdfft?md5=adc7940e8ab12976f6f52d385ce035c6&pid=1-s2.0-S2772397624000145-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992538","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":"Encouraging sustainable consumption: Investigating consumer inclination to purchase products made from mango wastes","authors":"Neeranuch Maitree , Phaninee Naruetharadhol , Sasichakorn Wongsaichia","doi":"10.1016/j.clema.2024.100232","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100232","url":null,"abstract":"<div><p>Given the current growth in consumer environmental concerns, this study assessed green customers’ consumption value for mango waste-based vegan leather bags. The consumer values and market choices theories guided semi-structured interviews and grounded theory-based induction data gathering and analysis. The project provides lasting answers and theoretical insights for vegan leather bags and mango waste management. The five main values are functional, social, emotional, conditional, and epistemic. Ten consumption-related topics emerged. Vegan leather bags were valued for their durability and multifunctionality by green shoppers. The data also show that social media, family, and peers impact sustainable product selections. For sustainable vegan leather purses created from mango waste, beautiful design and customization, green behavior, convenience, and environmental and green experience were the emotional and conditional values. Green customers’ openness to experience and green information can drive them to buy sustainable vegan leather bags, the study revealed.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100232"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000169/pdfft?md5=7347e24d11ccfdc894e684ffcc16105d&pid=1-s2.0-S2772397624000169-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140030661","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}
Cleaner MaterialsPub Date : 2024-03-01DOI: 10.1016/j.clema.2024.100233
Emmanue Olusola Oke , Kazeem Kolapo Salam , Titilayo Deborah Oluwole , Aru Eze Okere , Nnabodo Darlington , Kehinde Ayoola Babatunde , Yahya Umar , Suliyat Omolara Ibrahim
{"title":"Zeolite-Y-catalyst production from locally sourced Meta-kaolin: Computer-Aided scale-up process design and economic analysis with Monte-Carlo-Simulation","authors":"Emmanue Olusola Oke , Kazeem Kolapo Salam , Titilayo Deborah Oluwole , Aru Eze Okere , Nnabodo Darlington , Kehinde Ayoola Babatunde , Yahya Umar , Suliyat Omolara Ibrahim","doi":"10.1016/j.clema.2024.100233","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100233","url":null,"abstract":"<div><p>Production of zeolite-Y catalyst from natural substrate has been a research trend in the scientific community. Published articles revealed that zeolite-Y recovery from locally sourced metakaolin is confined to laboratory practice. Scale-up process design and its economic feasibility for zeolite-Y catalyst recovery are rarely found in the scientific bibliography. Therefore, this study presented conceptual scale-up process design, base-case techno-economics and Monte-Carlo simulation of zeolite Y recovery from Nigerian metakaoline. ASPEN Base Case Simulation (ABCS), scale-up design and economics were accomplished using inherent design and costing algorithms in ASPEN Batch Process Developer (ABPD) V10. Process economic parameters: Net Present Value (NPV), Internal Rate of Return (IRR), Return on Investment (ROI) and Payback Time (PBT), were modelled and optimized using Design Expert V13 software; while zeolite Unit Production Cost (UPC), Annual Production Cost (APC), Total Capital Investment (TCI) and interest/discount rate were considered as model inputs. Monte-Carlo Simulation (MCS) in Crystal Ball Oracle software was used to perform the sensitivity and uncertainty analyses. The base-case techno-economic results of process design of 600,000 kg/year zeolite production gave batch size 5000 kg/batch with 104 batches/year, batch time (4149 min), TCI ($15,930,306), APC ($147,145), NPV ($41,983,375), ROI (38.13 %) and PBT (2.14 years). The coefficient of determination (R<sup>2</sup>) of the economic models were 0.9978, 0.9989 and 0.9986 for NPV, ROI and IRR respectively. The optimum economic variables that maximized synthesis of 5000 kg/batch zeolite Y are UPC ($11.68), APC ($100,033) and TPC ($15,930,200). MCS uncertainty for NPV, IRR and ROI are negligible. Therefore, this study demonstrated that scale-up zeolite-Y production from the local substrate is economically feasible.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100233"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000170/pdfft?md5=7e2fea20500faec5b67e336e311e1a1c&pid=1-s2.0-S2772397624000170-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140052069","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}
Cleaner MaterialsPub Date : 2024-03-01DOI: 10.1016/j.clema.2024.100236
M. Saeed , R. Sami Ul Haq , S. Ahmed , F. Siddiqui , N. Mateen , K.A. Ahmed , J.B. Yi , Dragan Pamučar
{"title":"Sustainable selection of microwave absorbing materials: A green evaluation under interval-valued intuitionistic fuzzy environment","authors":"M. Saeed , R. Sami Ul Haq , S. Ahmed , F. Siddiqui , N. Mateen , K.A. Ahmed , J.B. Yi , Dragan Pamučar","doi":"10.1016/j.clema.2024.100236","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100236","url":null,"abstract":"<div><p>Environmentally friendly technology is being used by industries all over the world, and engineers in the manufacturing and materials industry are embracing sustainable business models. In this paradigm, materials are processed using economically and environmentally sound methods. The use of microwave-absorbing materials (MAMs) in low-altitude observatory aircraft and the rise in electromagnetic pollution have brought them to light. The main aim of this study is to select an ideal MAM with excellent physical, electromagnetic, chemical, and thermal properties, which also fulfills sustainability aspects based on expert judgments. In this regard, we have proposed a new hybrid framework consisting of Modified Digital Logic (MDL), a subjective weighting method in combination with the measurement of alternatives and ranking according to compromise solution (MARCOS) under an interval-valued intuitionistic fuzzy (IVIF) environment to select an optimum MAM. Furthermore, this research work contributes to streamlining the selection process by consolidating the plethora of work available in the literature on the synthesis and characterization of MAMs. A database is created for 160 potential candidate materials in C, S, X, and Ku bands for carbon-based materials, including carbon nanotubes (CNT), graphene, reduced graphene oxide (rGO), carbon fibers, and biomass-derived materials. These materials are then passed through successive screening stages to shortlist 14 materials, which are ranked subsequently over a set of 15 crisp and ambiguous criteria. This comprehensive study simultaneously caters to quantitative and qualitative information extracted from experimental work, material resource packs, or expert evaluations. The findings highlight CNT/Fe (20 wt%, E) (Al1) as the most suitable candidate for MAM application with outstanding electromagnetic properties. Finally, the results are compared with extant approaches to check the reliability of the proposed framework. In addition, sensitivity analysis is carried out to establish the feasibility and robustness of the obtained results.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100236"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000200/pdfft?md5=be5dadfb7ff42c9bdf1144a982cebd98&pid=1-s2.0-S2772397624000200-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140103525","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}
Cleaner MaterialsPub Date : 2024-02-15DOI: 10.1016/j.clema.2024.100228
Maria de Lourdes dos Santos Schackow , Adilson Schackow , Karoline Bastos Mundstock , Marilena Valadares Folgueras
{"title":"Sustainable silico-aluminous refractory wastes as an alternative raw material for hydraulic binder for foundry industry","authors":"Maria de Lourdes dos Santos Schackow , Adilson Schackow , Karoline Bastos Mundstock , Marilena Valadares Folgueras","doi":"10.1016/j.clema.2024.100228","DOIUrl":"10.1016/j.clema.2024.100228","url":null,"abstract":"<div><p>The foundry industry is responsible for consuming large quantities of lining materials and generating significant amounts of waste. Silico-aluminous linings are used in the production of cast iron due to their compatibility with molten metal and slag. However, after use, these materials are typically disposed of in industrial landfills, creating an environmental liability. This study demonstrated a feasible alternative approach to repurpose silico-aluminous refractory wastes from induction furnaces and casting ladles from the foundry industry to develop new materials for refractory hydraulic binders for lining (refractory patch). The wastes were characterized using X-ray Diffraction, X-ray Fluorescence Spectrometry, Thermal Analysis, Scanning Electron Microscopy, and particle size distribution. The behavior of the lining wastes was found to be compatible with the proposed application, despite the expected contamination. There is potential for cost savings of at least 25 % and promoting a culture of recycling.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100228"},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000121/pdfft?md5=768d44af1c2f7865afda6254df7c3450&pid=1-s2.0-S2772397624000121-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139815150","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}
Cleaner MaterialsPub Date : 2024-02-15DOI: 10.1016/j.clema.2024.100227
G.I.P. Perera, T.S. Wegala
{"title":"Improving the novel white coconut oil-based metalworking fluid using nano particles for minimum surface roughness and tool tip temperature","authors":"G.I.P. Perera, T.S. Wegala","doi":"10.1016/j.clema.2024.100227","DOIUrl":"10.1016/j.clema.2024.100227","url":null,"abstract":"<div><p>At present, nearly 85 % all of the requirement for MWFs are satisfied by the use of mixtures of petroleum by-products and synthetic substances with supplementary additives to enhance their properties. The demand for easily biodegradable, environmental friendly MWFs is a current requirement. COCOTP, a novel biodegradable MWF based on white (refined) coconut oil, developed by authors, had previously shown promising tribological properties for machining mild steel (MS) and stainless steel (SS) when used with the flooding method, but had fallen short of the performance of commercially available, non-biodegradable alternatives with MQL. Therefore in the current investigation, nano-particles were added to improve the performance of novel COCOTP MWF to use it with MQL conditions. Two nanomaterials nano-graphite and nano-Al<sub>2</sub>O<sub>3</sub> were separately added to the base fluid in different concentrations as a monodispersed suspension. These nano enhanced fluids (NEFs) were subsequently used in straight turning experiments of two work materials AISI304 and SS400. Both the nano-enhanced fluids show convincing improvements over both COCOTP and mineral-oil based fluids in terms of surface roughness of the specimens regardless of the material being turned. However when machining SS 400, NEFs perform better only in lower speeds in terms of temperature. SS400 has a much higher thermal conductivity than AISI304 means that the quantity of residual heat remaining at the point of material removal which can be absorbed by the cutting fluid is lower in SS400. During machining SS400 under MQL lubrication 9.8 %, 26.8 % and 24 % reduction of surface roughness values (with respect to soluble oil) and during machining AISI304 55.3 %, 73.7 % and 70.4 % reduction of surface roughness values were obtained at 1175 rpm with COCOTP, NEF A and NEF G respectively. Based on the experimental results, the best-performing nano-enhanced fluids under MQL are 0.3 % (w/w) Al<sub>2</sub>O<sub>3</sub> and 0.3 % (w/w) graphite.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100227"},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277239762400011X/pdfft?md5=c0ffc0135ff91388d3c532f8971df833&pid=1-s2.0-S277239762400011X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139892608","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}
Cleaner MaterialsPub Date : 2024-02-12DOI: 10.1016/j.clema.2024.100224
Aditi Roy , G.M. Sadiqul Islam
{"title":"Geopolymer using different size fractions of recycled brick-based mixed demolition waste","authors":"Aditi Roy , G.M. Sadiqul Islam","doi":"10.1016/j.clema.2024.100224","DOIUrl":"10.1016/j.clema.2024.100224","url":null,"abstract":"<div><p>The hike in CO<sub>2</sub> emission from the cement industry calls for an alternative binder to cement. On the other hand, construction<!--> <!-->and demolition waste management is a global concern. This research aims to demonstrate the complete applicability of brick-based demolition wastes in geopolymer mortar and concrete. Ground Granulated Blast Furnace Slag (GGBS) was used with brick waste to improve performance. 3 M, 4 M and 6 M NaOH were used for mortar preparation, and 6 M NaOH was used for concrete tests. The performance of the geopolymer binder and mortar was compared with the control specimen. 5 % to 20 % incorporation of demolition waste powder (DWP) with GGBS was explored to find the optimum binder combination. A 10 % incorporation for 3 M and 15 % for 4 M and 6 M was found optimum. Then, 10 % to 100 % incorporation of brick sand was studied to examine the influence of brick-based demolition waste on the fresh and hardened properties of mortar. Sand: Binder: Alkaline activator was taken 3.375: 1: 0.45 for mortar. The workability of mortar varied with the increase of brick sand content. The flexural and compressive strengths were decreased with an increase in brick sand content for all molarities of NaOH; consequently, the water absorption increased with brick sand content. The maximum mortar compressive strength of 27 MPa was found for 10 % demolished sand with a 6 M alkali concentration. However, consistent results were obtained with a 4 M concentration. Geopolymer concrete from brick-based demolition waste was prepared using 6 M NaOH. The UPV result indicates the regular quality of the concrete cube, with acceptable capillary water absorption after 24 h. However, the compressive strength of geopolymer concrete could be useful for non-structural works, and therefore, further studies with higher strength of NaOH for geopolymer concrete are recommended.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100224"},"PeriodicalIF":0.0,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277239762400008X/pdfft?md5=3522f14da2b7accd592d255b6a484ec4&pid=1-s2.0-S277239762400008X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139892549","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}
Cleaner MaterialsPub Date : 2024-02-11DOI: 10.1016/j.clema.2024.100225
Sunday U. Azunna , Farah Nora Aznieta Binti Abd Aziz , Noor Abbas Al-Ghazali , Raizal S.M. Rashid , Nabilah A. Bakar
{"title":"Review on the mechanical properties of rubberized geopolymer concrete","authors":"Sunday U. Azunna , Farah Nora Aznieta Binti Abd Aziz , Noor Abbas Al-Ghazali , Raizal S.M. Rashid , Nabilah A. Bakar","doi":"10.1016/j.clema.2024.100225","DOIUrl":"10.1016/j.clema.2024.100225","url":null,"abstract":"<div><p>Rubberized geopolymer concrete (RuGPC) is a new, environmentally safe building material requiring less energy and carbon footmark than normal cement-based systems, which can significantly reduce global warming concerns. Using waste rubber tyres by incorporating them in concrete as a substitute for natural aggregate, helps to reduce pollution and depletion of natural resources. Research shows that incorporating waste crumb rubber in geopolymer concrete (GPC) can reduce carbon dioxide emissions by 90% compared to ordinary Portland cement (OPC) and attain sufficient and mechanical properties and durability. This paper reviews the material properties of RuGPC and the possible structural application. It can be concluded, that RuGPC can substitute normal concrete (NC) particularly due to its impact resistance, and energy absorption performance. However, more research still needs to be conducted to be able to come up with practical design standards and conduct full-scale studies on RuGPC elements structurally to promote its practicability.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"11 ","pages":"Article 100225"},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000091/pdfft?md5=720e72ccc950fe504c8c188afa9236de&pid=1-s2.0-S2772397624000091-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139822639","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}