Cleaner Materials最新文献

{"title":"A review of polymer-modified asphalt binder: Modification mechanisms and mechanical properties","authors":"Qilin Yang ,&nbsp;Jiao Lin ,&nbsp;Xiaowei Wang ,&nbsp;Dawei Wang ,&nbsp;Ning Xie ,&nbsp;Xianming Shi","doi":"10.1016/j.clema.2024.100255","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100255","url":null,"abstract":"<div><p>The significant increase in the number of vehicles, traffic speed, and load has significantly reduced the lifespan of pavements and increased maintenance costs. Therefore, the incorporation of polymers into bituminous binders is imperative to enhance pavement quality and performance. Nowadays, polymer-modified asphalt binders (PMBs) play a crucial role in pavement engineering. This polymer absorbs asphalt molecules to form a network connecting the entire binder, giving it better viscoelasticity than the base asphalt. Although polymers do enhance the properties of asphalt to some extent, there are still certain limitations hindering the future development of polymer-modified asphalt, such as high costs, low resistance to aging, and poor storage stability. Additionally, there is limited literature available that reviews the advantages and disadvantages of various polymer modifiers. The aim of this paper is to conduct a systematic review that evaluates the benefits and drawbacks of different polymer types in modifying asphalt materials. This comprehensive synthesis study thoroughly examines the historical evolution of polymer modified binders (PMBs) for asphalt pavement, including selection criteria for polymers used in asphalt modification, current state-of-the-art knowledge regarding the internal structure and morphology of PMBs, evaluation methodologies for PMB properties, binder specifications specific to PMBs, recommendations based on findings, and future research. This review will not only merit research from an academic perspective, but also provide guidance for pavement engineering.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100255"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S277239762400039X/pdfft?md5=26af89f62c758837c47676c277377691&pid=1-s2.0-S277239762400039X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141323860","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":"Recent developments on low carbon 3D printing concrete: Revolutionizing construction through innovative technology","authors":"Mehran Khan,&nbsp;Ciaran McNally","doi":"10.1016/j.clema.2024.100251","DOIUrl":"10.1016/j.clema.2024.100251","url":null,"abstract":"<div><p>3D Printing Concrete (3DPC) represents an innovative advancement in construction, enabling the creation of intricate and custom structures while simultaneously reducing material waste and expediting construction schedules. This comprehensive review delves into the latest advancements in 3DPC technology and its capacity to reshape the building and construction sectors. The paper explores recent progress in 3DPC printing systems, methodologies, materials, and applications. It places particular emphasis on the diverse parameters and concrete mix proportions that wield substantial influence over the 3DPC process. Furthermore, this study delves into the utilization of waste materials as Supplementary Cementitious Materials, i.e., nano clay, nano-silica, and ground granulated blast-furnace slag, to enhance the properties of 3DPC. This discussion extends to the consideration of 3DPC as a low-carbon concrete, outlining both its advantages and the challenges associated with its practical implementation. Additionally, the paper presents case studies of large-scale 3DPC applications and structures, discussing their economic and environmental outcomes, particularly when incorporating waste materials into 3DPC applications. Through this comprehensive analysis, the paper highlights the potential of 3DPC to revolutionize construction practices and anticipates further advancements in this dynamic field.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100251"},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000352/pdfft?md5=7ea14f857621f61a4a439e57da1d31d9&pid=1-s2.0-S2772397624000352-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141051931","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":"Mechanical recycling of foam from end-of-life mattresses by AIR-LAY process for the production of new mattresses with a fully circular approach","authors":"G. Liberati ,&nbsp;F. Biagi ,&nbsp;A. Nanni ,&nbsp;M.F. Parisi ,&nbsp;L. Barbaresi ,&nbsp;L. Querci ,&nbsp;S. Ceccarelli ,&nbsp;M. Regazzi ,&nbsp;A. Bonoli ,&nbsp;M. Colonna","doi":"10.1016/j.clema.2024.100249","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100249","url":null,"abstract":"<div><p>A novel method for the recycling of end-of-life mattresses foam, using an AIR-LAY process which employs a bi-component fiber as a binder for the polyurethane foam, have been developed and optimized. This method permits to obtain materials with the same density of the starting foam (25 kg/m³) and with a significantly lower density with respect to that obtainable with the rebonding process (above 70 kg/m³) that uses isocyanates to bond the foam particles. The obtained recycled foams have been tested by mechanical compression and recovery tests showing that compression values of 3.7 KPa, similar to that of the mattress foam (3.0 KPa), can be achieved using 20 % of bi-component fibers as binders and a density of 35 kg/m³. On the contrary, only 3 times stiffer and denser materials can be obtained using the rebonding technology, thus making them not suitable for application in mattresses. On the basis of the results of the optimization tests a set of mattresses containing a layer of the recycled foams have been prepared. The results of the tests on the prepared mattresses have shown that they have the same compression behavior, recovery time and durability (after 30,000 cycles of compression) of a standard mattress without the recycled layer, thus proving that a fully circular approach in the recycling of the foam of the mattresses is possible using the AIR-LAY process.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100249"},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000339/pdfft?md5=e8d82659befb9e7bd2077a61f0de73f5&pid=1-s2.0-S2772397624000339-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140893912","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":"Synergistic enhancement of photocatalytic efficiency and durability in CoNi-decorated Cu2O/Cu films for superior synthetic dye degradation","authors":"Setia Budi ,&nbsp;Mega Gladiani Sutrisno ,&nbsp;Tritiyatma Hadinugrahaningsih","doi":"10.1016/j.clema.2024.100250","DOIUrl":"10.1016/j.clema.2024.100250","url":null,"abstract":"<div><p>The Cu₂O/Cu emerges as a promising candidate for photocatalytic application owing to its efficient photon absorption in the visible light spectrum. However, the susceptibility of Cu₂O-based photocatalysts to self-decomposition diminishes their effectiveness. This study introduces CoNi as co-catalyst to enhance the durability of Cu₂O/Cu photocatalyst. Electrodeposition was employed to decorate the Cu₂O/Cu crystal surface with Co, Ni and CoNi. The deposition potential of CoNi was optimized to produce a high-performance photocatalyst. The utilization of CoNi co-catalyst resulted in significant enhancements in photoelectrochemical properties under light irradiation when compared to using a single Co or Ni co-catalyst, suggesting a synergistic effect between Co and Ni within the system. The enhancement is evidenced by a noteworthy increase in the photocurrent of the photocatalyst, rising from 10.24 mA/cm² to 20.81 mA/cm². In addition, the decoration of CoNi resulted in a reduction of the charge transfer resistance from 4.2 kΩ to 0.7 kΩ, while simultaneously increasing the electrochemically active surface area of the photocatalyst from 15.49 cm² to 157.69 cm². The observed modifications lead to a substantial improvement in the photocatalytic efficiency, resulting in an impressive 88 % degradation of methylene blue, which is 3.4 times higher than achieved in the absence of the co-catalyst. Moreover, there was a significant improvement in the photostability of the photocatalyst, with an increase from 16.81 % to 50.55 %. These findings demonstrate the significance of CoNi co-catalyst decoration in producing a highly active and durable photocatalyst, making it a promising candidate for efficient synthetic dyes degradation.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100250"},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000340/pdfft?md5=d65df964687560bb7785c9565fbda81e&pid=1-s2.0-S2772397624000340-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141033362","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":"Recent advance in using eco-friendly carbon-based conductive ink for printed strain sensor: A review","authors":"Nur Iffah Irdina Maizal Hairi ,&nbsp;Aliza Aini Md Ralib ,&nbsp;Anis Nurashikin Nordin ,&nbsp;Muhammad Farhan Affendi Mohamad Yunos ,&nbsp;Lim Lai Ming ,&nbsp;Lun Hao Tung ,&nbsp;Zambri Samsudin","doi":"10.1016/j.clema.2024.100248","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100248","url":null,"abstract":"<div><p>Printed electronics specifically printed strain sensor is emerging as a way forward for wearable application because of its flexibility and sustainability. Many efforts have been made to ensure the eco-friendliness of synthesized carbon-based ink to reduce the electronic waste. Carbon based fillers such as carbon nanotube have been widely used because of high electrical conductivity and excellent mechanical properties. However, the production of carbon-based fillers towards the environment still needs to be attended due to the involvement of hazardous fossil-based precursors that may harm the environment. Besides, the involvement of binders such as polyvinyl chloride (PVC), synthetic solvents and additives in the synthesis of the carbon-based conductive ink can impact serious health and environmental issues. Hence, the usage of natural precursors for green synthesis of carbon and the incorporation of biopolymer binder which are environmentally friendly and renewable need to be considered as an alternative to produce eco-friendly conductive ink. This review article presents the progress in green synthesis of the carbon-based filler, recyclability of the ink and material selection for the ink composition from biopolymer binder, solvent and additives that are eco-friendly. The performances of the carbon-based conductive ink are discussed in terms of the percolation theory and tunneling effect that form the conductive pathway in microscopic level in stretching and relaxing phenomena for printed strain sensor applications. The rheological properties of the printed ink such as viscosity, surface tension and adhesion properties to the chosen substrate also plays crucial role depending on the chosen printing technique of the printed strain sensor. The highlight of this paper is it also correlates the performance of the printed strain sensor in terms of its sensitivity using different eco-friendly carbon-based conductive ink with different printing techniques.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100248"},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000327/pdfft?md5=3b66ccd3f577186e3d9aecb61de17e00&pid=1-s2.0-S2772397624000327-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140644311","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":"Low energy synthesis of crystalline mesoporous aluminosilicate consisting of Na-P1 zeolite derived from coal fly ash","authors":"Md. Saiful Quddus ,&nbsp;Mandira Saha ,&nbsp;Md. Hasanuzzaman ,&nbsp;Nahid Sharmin ,&nbsp;Muhammad Shahriar Bashar","doi":"10.1016/j.clema.2024.100247","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100247","url":null,"abstract":"<div><p>Worldwide every year massive amount of coal fly ash is being generated as by product in the power plants which creates economic, environmental and most importantly health problems. Usually coal fly ash is used in cement production worldwide. At present, in Bangladesh, about 95 % of fly ash remains still unutilized. The alkali activation of fly ash has become a top research topic as it is possible to synthesize low cost and ecologically sound mesoporous zeolite type materials. In the present work, to the best of our knowledge, for the first time in Bangladesh, synthesis and characterization of crystalline mesoporous (H3 type hysteresis) aluminosilicate consisting of Na-P1 zeolite with a high BET specific surface area and a high pore volume from coal fly ash based on hydrothermal alkali activation technique have been successfully done. This product has versatile applications like catalysis, gas separation, water softening, water purification, gas sensing etc. The variable of alkali concentration was studied which has the notable influence on the development of the framework of the pores. The untreated coal fly ash (CFA) and the synthesized modified fly ashes (MFAs) were tested by WDS-XRF, XRD, N₂ physisorption, FE-SEM, FT-IR, XPS, EDAX-mapping, particle size analysis and other technologies. The BET specific surface area, total pore volume and average pore diameter of the CFA were only 3 m²/g, 0.01 cc/g and 6.3 nm respectively based on nitrogen gas physisorption technique, whereas, after alkali activation at a specific temperature and time, and then curing, significant and promising increased values of the said parameters of 45 m²/g, 0.11 cc/g and 9.8 nm were obtained respectively. In methylene blue dye adsorption experiment, MFA showed higher adsorption capacity (23.87 mg/g).</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100247"},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000315/pdfft?md5=76480ff342e06cc77b3fe29b956c4ef6&pid=1-s2.0-S2772397624000315-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140559204","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":"Physio-mechanical and micro-structural properties of cost-effective waste eggshell-based self-healing bacterial concrete","authors":"Zerihun Mamo Asamenew,&nbsp;Fikreyesus Demeke Cherkos","doi":"10.1016/j.clema.2024.100246","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100246","url":null,"abstract":"<div><p>Concrete is versatile but prone to cracking, which weakens its strength and durability. Self-healing concrete can automatically repair cracks, thereby preventing their occurrence. Previous studies have focused on improving self-healing efficiency in concrete to regulate cracks and minimize their effects. Unfortunately, the initial cost of self-healing concrete concerning calcite precipitation by bacterial actions is high. The current study implemented cost-reduction measures by synthesizing calcium lactate from waste eggshells and lactic acid using a more affordable bacterial growth medium made of yeast extract and molasses. To make self-healing concrete specimens, a mixture of OPC, sand, gravel, water, calcium lactate, and Bacillus subtilis bacterial solution was mixed directly at a concentration of (9.84 x 10⁶ and 4.56 x 10⁸) cells/mL. The study found that the workability of bacterial concrete exceeds that of conventional concrete, attributed to the addition of calcium lactate, which acts as a retarding agent and improves the mix's fluidity. Over a 28-day curing period, bacterial concrete with a dosage of 20 mL at a concentration of 9.84 x 10⁶ cells/mL enhanced compressive strength by 14.37 % and reduced water absorption by 23.05 %. This may be due to the calcite precipitation by bacteria that fills voids and micro-cracks inside the concrete matrix. The study also discovered that cracks smaller than 0.5 mm were fully healed within 14 days due to calcite formation produced by bacterial activity. Images from scanning electron microscopes and X-ray diffraction verified the existence of calcite in these cracks. Additionally, the current study highlighted cost reductions in waste eggshell-based self-healing bacterial concrete compared to other study-related findings. Overall, the study emphasizes the advantages of using bacterial self-healing concrete: eco-friendly, cost-effective, enhances workability, strength, and durability, and can autonomously repair cracks without human intervention.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100246"},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000303/pdfft?md5=5abb8af91922abc5e7d5a547eaf1cc31&pid=1-s2.0-S2772397624000303-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140547043","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":"Chemical-free thermal-acoustic panels from agricultural waste for sustainable building materials","authors":"Siwat Lawanwadeekul ,&nbsp;Nipa Jun-On ,&nbsp;Panisara Kongthavorn ,&nbsp;Teerawat Sangkas ,&nbsp;Suphaporn Daothong","doi":"10.1016/j.clema.2024.100245","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100245","url":null,"abstract":"<div><p>To address the pressing need for sustainable building materials, this study introduced an innovative and eco-friendly approach to manufacturing thermal-acoustic panels, utilizing agricultural waste with rice straw as the primary material. Paper pulp (PP) and Persea kurzii (PK) were used as non-chemical binders at ratios of 50:50, 60:40, 70:30, and 80:20. After mixing, all the samples were subjected to heat-free hydraulic compression at 5 bars to evaluate their physical, mechanical, thermal, and acoustic properties. Increasing the proportion of the binder directly impacted panel density and flexural strength while also inversely affecting porosity. The PK binder had a low thermal conductivity value of 0.040 W/mK, proving it was a good thermal insulator with a high sound absorption coefficient, especially at higher frequencies. The RSPP-4 panel had the highest noise reduction coefficient (0.51) and absorbed low frequencies, suggesting its potential for noise reduction. Microscopic analysis provided further insight into panel surface characteristics. PP exhibited a smooth surface with a continuous fiber weave that did not obscure the pores, while PK consisted of particles. The correlation between surface characteristics and acoustic performance, especially at high frequencies, underscored the intricate balance between material properties. Research results can be applied in the construction industry to develop sustainable building materials that offer superior thermal and acoustic properties. These thermal-acoustic panels can effectively utilize agricultural waste and show potential as environmentally friendly construction materials to enhance indoor comfort and acoustics in various building environments.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100245"},"PeriodicalIF":0.0,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000297/pdfft?md5=fce6f40d152fb94cd431991b24c0eb03&pid=1-s2.0-S2772397624000297-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140543638","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":"Reutilization of waste cling film as a toughening agent and self-plasticizer in recycled poly(vinyl chloride) pipe for semi-rigid building material applications","authors":"Benjatham Sukkaneewat ,&nbsp;Jakkid Sanetuntikul ,&nbsp;Phisut Naknaen ,&nbsp;Kriangsak Ketpang ,&nbsp;Nawadon Petchwattana","doi":"10.1016/j.clema.2024.100244","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100244","url":null,"abstract":"<div><p>Alternative approaches are urgently needed for both reuse and recycling of poly(vinyl chloride) (PVC) waste. Herein, this study aims to recycle rigid PVC pipe by toughening and plasticizing it with waste cling film (CF). The CF has been first reused as a polymer additive by blending it with PVC from 0 to 50 wt% using a two-roll mill and compression molding machines. Both static and dynamic mechanical properties, morphology, thermal transition, thermal stability, and migration of the recycled PVC (rPVC) were investigated and compared to unmodified rigid PVC. Principal results showed that the CF significantly improved softness and toughness of rPVC. Remarkably increased elongation to 206 % (an 8-fold increase from the rPVC) with strain-hardening event was obtained by utilizing 50 %wt of CF, while tensile and flexural strength decreased owing to the softening effect of CF. There was the strong correlation between microstructure and static mechanical properties. The wire drawing morphology of the toughest rPVC indicated the toughening mechanism of CF <em>via</em> the shear banding behavior, which was inside proposed. A glass transition temperature reduction of 35 ^°C was achieved. Despite the continued migration of plasticizer in the CF modified rPVC, volatilization was diminished across all recycled formulations, leading to comparable thermal stability of the rPVCs with unmodified PVC under typical processing temperatures. According to these findings, the potential capabilities of the CF as the toughening agent and self-plasticizer of PVC for further reutilization were confirmed. This study provides a new idea for reduction of PVC waste and evaluation of their potential applications. An alternative additive, derived from flexible PVC waste, was also explored, and introduced to the polymeric system.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100244"},"PeriodicalIF":0.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000285/pdfft?md5=85f82acb78c1ffde2e9a2f74ccc6138d&pid=1-s2.0-S2772397624000285-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140338931","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":"Environmental impact evaluation of low-carbon concrete incorporating fly ash and limestone","authors":"J. Thorne ,&nbsp;D.V. Bompa ,&nbsp;M.F. Funari ,&nbsp;N. Garcia-Troncoso","doi":"10.1016/j.clema.2024.100242","DOIUrl":"https://doi.org/10.1016/j.clema.2024.100242","url":null,"abstract":"<div><p>This work examines the environmental impact of low-carbon concrete that incorporates supplementary cementitious materials (SCMs). After reviewing near-zero carbon SCMs and low-carbon concrete, a life cycle assessment (LCA) was undertaken for concrete mix designs with normal-to-high compressive strengths, incorporating limestone and fly ash as cement replacements. The analysis includes relevant region-specific life cycle inventory parameters for raw materials, energy production, and transportation. A comparative assessment between embodied carbon emissions and the material mechanical performance is then made. The results of this paper indicate that incorporating limestone and fly ash in concrete can reduce carbon emissions, yet at a proportional decrease in mechanical properties compared to conventional cement concrete. The combination of cement and fly ash produced, on average, a higher strength concrete by 20.5% and lower CO₂-eq values by 21.1% when compared to limestone cement blends. The CO₂-eq emissions associated with transportation of the main constituents for concrete production were on average below 4% of the total CO₂-eq per mix. In addition to eco-mechanical quantitative assessments, the study offers insights and recommendations for the development of concrete materials considering global resource availability of near-zero carbon concrete constituents.</p></div>","PeriodicalId":100254,"journal":{"name":"Cleaner Materials","volume":"12 ","pages":"Article 100242"},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772397624000261/pdfft?md5=d5a254dfb12f4ca621bf6593bcab02e6&pid=1-s2.0-S2772397624000261-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140338661","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}