Littérature scientifique sur le sujet « Geopolymer (GEO) »
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Articles de revues sur le sujet "Geopolymer (GEO)"
Et. al., P. Suresh Chandra,. « Dynamic and Analysis of A Geo-Polymer Concrete Structure ». INFORMATION TECHNOLOGY IN INDUSTRY 9, no 2 (21 mars 2021) : 55–61. http://dx.doi.org/10.17762/itii.v9i2.303.
Texte intégralKavya, M. Sri, R. Satyanarayana, N. Vamshi Krishna, T. Jayanth et G. Prem Kumar. « Experimental Investigation of Mechanical Properties of Geo–Polymer Concrete Using Flyash ». International Journal for Research in Applied Science and Engineering Technology 12, no 4 (30 avril 2024) : 2769–74. http://dx.doi.org/10.22214/ijraset.2024.60513.
Texte intégralSai Ketana, Nutakki, V. Srinivasa Reddy, M. V. Seshagiri Rao et S. Shrihari. « Mathematical model for predicting stress-strain behavior of low calcium fly-ash based geopolymer concrete ». E3S Web of Conferences 309 (2021) : 01103. http://dx.doi.org/10.1051/e3sconf/202130901103.
Texte intégralUthayakumar, Marimuthu, Ponnambalam Balamurugan, Kinga Korniejenko, Szymon Gądek et Dariusz Mierzwiński. « Abrasive water jet machining of fly ash and metakaolin based geo-polymers ». MATEC Web of Conferences 322 (2020) : 01020. http://dx.doi.org/10.1051/matecconf/202032201020.
Texte intégralReddy, Gadikota Chennakesava, et KHK Reddy. « Strength and Durability Studies of Geo-Polymer Concrete in the presence of Marine Water ». IOP Conference Series : Earth and Environmental Science 1280, no 1 (1 décembre 2023) : 012022. http://dx.doi.org/10.1088/1755-1315/1280/1/012022.
Texte intégralAl-Ghouti, Mohammad A., Mariam Khan, Mustafa S. Nasser, Khalid Al Saad et OON Ee Heng. « Application of geopolymers synthesized from incinerated municipal solid waste ashes for the removal of cationic dye from water ». PLOS ONE 15, no 11 (5 novembre 2020) : e0239095. http://dx.doi.org/10.1371/journal.pone.0239095.
Texte intégralNdagi, Abubakar, et Mohd Saleh Jaafar. « Geo-Polymer Binder as Portland Cement Alternative : Challenges, Current Developments and Future Prospects ». Jurnal Kejuruteraan 31, no 2 (31 octobre 2019) : 281–86. http://dx.doi.org/10.17576/jkukm-2019-31(2)-12.
Texte intégralSubaer, Subaer, Hamzah Fansuri, Abdul Haris, Misdayanti, Resky Irfanita, Imam Ramadhan, Yulprista Putri et Agung Setiawan. « Pervaporation Membranes for Seawater Desalination Based on Geo–rGO–TiO2 Nanocomposites. Part 1 : Microstructure Properties ». Membranes 11, no 12 (8 décembre 2021) : 966. http://dx.doi.org/10.3390/membranes11120966.
Texte intégralRathour, Toshan Singh. « Strength and Durability of Geo-Polymer Concrete with Mineral Admixture ». International Journal for Research in Applied Science and Engineering Technology 10, no 1 (31 janvier 2022) : 770–75. http://dx.doi.org/10.22214/ijraset.2022.39899.
Texte intégralSrivathsav, Bitla, N. Prem Kumar, S. Shrihari et C. Vivek Kumar. « Proposed mathematical model for stress- strain behaviour of geopolymer concrete ». E3S Web of Conferences 309 (2021) : 01053. http://dx.doi.org/10.1051/e3sconf/202130901053.
Texte intégralThèses sur le sujet "Geopolymer (GEO)"
Lee, William K. « Solid-gel interactions in geopolymers ». Connect to thesis, 2002. http://repository.unimelb.edu.au/10187/1071.
Texte intégralGeopolymerisation is such a ‘green’ technology capable of turning both natural ‘virginal’ aluminosilicates and industrial aluminosilicate wastes, such as fly ash and blast furnace slag, into mechanically strong and chemically durable construction materials. However, the source materials for geopolymer synthesis are less reactive than Portland cement clinkers and the chemical compositions of these source materials can vary significantly. Consequently, product quality control is a major engineering challenge for the commercialisation of geopolymers.
This thesis is therefore devoted to the mechanistic understanding of the interfacial chemical interactions between a number of natural and industrial aluminosilicates and the various activating solutions, which govern the reactivity of the aluminosilicate source materials. The effects of activating solution alkalinity, soluble silicate dosage and anionic contamination on the reactivity of the aluminosilicate source materials to produce geopolymeric binders, as well as their bonding properties to natural siliceous aggregates for concrete making, are examined. In particular, a new set of novel ‘realistic’ reaction models has been developed for such purposes. These reaction models have been further utilised to develop a novel analytical procedure, which is capable of studying geopolymerisation on ‘real’ geopolymers in situ and in real time. This novel procedure is invaluable for the total understanding of geopolymerisation, which is in turn vital for effective geopolymer mix designs.
Ercoli, Roberto. « Chemical neutralization of industrial by-products from the secondary aluminum industry : re-use as foaming agents for the synthesis of geopolymers and monitoring of the hydrogen-rich gas production ». Doctoral thesis, Urbino, 2022. http://hdl.handle.net/11576/2698511.
Texte intégralReeb, Charles. « Synthèse et caractérisation de composites à base de matériaux alcali-activés incorporant des huiles minérales pour la gestion des huiles tritiées ». Electronic Thesis or Diss., Centrale Lille Institut, 2022. http://www.theses.fr/2022CLIL0020.
Texte intégralThis work deals with the conditioning of tritiated industrial oils in the context of nuclear wastes that are still deprived of an appropriate treatment solution. The strategy consists in directly conditioning model mineral oils in alkali-activated materials (AAM), additionally functionalized with a γ-MnO2/Ag2O hydrogen/tritium getter. Geopolymer (GEO) and alkali-activated blast furnace slag (AABFS) are considered as AAM. In the presence of surfactants, the oil was successfully emulsified (small and homogeneous droplets) in both types of AAM. Two surfactant mechanisms are distinguished acting by: 1) decreasing the interfacial tension or 2) promoting oil-particles interactions. Mechanism 1 should be favored if workability of fresh mixtures is required, while mechanism 2 should be targeted to provide a better confinement of oil owing to strong oil-particles interactions. After curing, AAM-OIL composites are obtained. There is no influence of the oil and surfactants on the setting time and strength development of AAM. The main reaction products (C-A-S-H in AABFS and N-A-S-H in GEO) are not impacted. However, the addition of surfactants leads to increased porosity of AAM due to air bubbles stabilization. AAM-OIL composites immobilizing 20%vol. of oil all have compressive strengths higher than 20 MPa, which is a more than the 8 MPa required from ANDRA. Overall, according to both fresh and hardened states observations, GEO exhibit higher performances for the immobilization of oil than AABFS. The efficiency of the γ-MnO2/Ag2O getter was assessed in AAM via in-situ hydrogen production by gamma irradiations or magnesium corrosion. Both types of experiments agree to the higher performances of the getter in GEO than in AABFS. This is explained by reducing sulfur species present in AABFS, which react with the oxidizing getter components. Finally, wetting measurements demonstrated that industrial oils have an excellent affinity for GEO, testifying that long-term water seepage is not likely to dislodge them from GEO-OIL composites. In the context of nuclear waste management, GEO functionalized with γ-MnO2/Ag2O getter appears as a promising option for disposal of tritiated oils. However, additional investigations of HTO confinement need to be performed that could renew the interest of using AABFS
Rincón, Acacio. « Development of low cost waste-derived sintered glass-ceramics for energy saving and recovery ». Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426371.
Texte intégralL’obiettivo delle attività di ricerca presentate è l’individuazione di una nuova tecnica per la produzione di schiume di vetro e vetroceramiche, basata sulla combinazione di un processo di attivazione alcalina di materiali ricchi di silice e successiva schiumatura del gel inorganico mediante un tensioattivo e un trattamento termico finale mediante sinterizzazione e cristallizzazione (“sinter-crystallisation”). Si tratta di un processo più economico ed ecologicamente sostenibile rispetto alle attuali procedure, basate su miscele di polveri di vetro e agenti schiumogeni, che sono soggette a decomposizione e rilasciano gas a una temperatura significativamente superiore al punto di rammollimento (“softening point”) del vetro. Questa nuova tecnica offre una strategia alternativa per la valorizzazione di materiali di scarto ad alto contenuto di silice. L'attivazione alcalina degli scarti di vetro consente di ottenere sospensioni concentrate ben disperse, le quali subiscono una gelificazione mediante trattamento a bassa temperatura (40-80°C), ascrivibile alla formazione di idrati di silicato. Si è ottenuta una schiumatura diretta ed estesa mediante agitazione meccanica di sospensioni parzialmente gelificate, con l’ausilio di un tensioattivo. La microstruttura finale (livello totale di porosità, dimensione delle celle) può essere direttamente correlata al grado di gelificazione. È stato infine applicato un trattamento di sinterizzazione a soli 700°C, per stabilizzare le strutture e limitare la lisciviazione (“leaching”) di ioni alcalini. È stata dimostrata l’applicabilità di tale approccio a diverse tipologie di vetro e miscele di rifiuti industriali, ottenendo diversi gel in seguito all'attivazione alcalina. L'attivazione alcalina del vetro sodico-calcico di scarto è stata sfruttata attraverso la miscelazione con rifiuti inorganici ricchi di ferro da scorie di rame e ceneri volatili prodotte dalla combustione del carbone. L'approccio è stato esteso anche a diversi materiali a base di vetro provenienti da rifiuti, come il vetro borosilicato proveniente dal riciclaggio di fiale farmaceutiche e ceneri pesanti vetrificate provenienti dagli inceneritori di rifiuti solidi urbani. Sono state esplorate e comprese diverse combinazioni di parametri di processo (tensioattivi, soluzioni di attivazione, tempi di polimerizzazione, condizioni per il trattamento termico ecc.). Oltre che per la creazione di materiali derivati dai rifiuti e l’individuazione di possibili applicazioni nel settore dell'edilizia, la tecnica è stata utilizzata anche per creare scaffold vetroceramici bioattivi altamente porosi, a dimostrazione della versatilità dall'approccio. L'indurimento progressivo associato alla polimerizzazione inorganica che configura un "gel inorganico" è stato inoltre sfruttato per produrre ceramiche avanzate, come schiume e scaffold di mullite e cordierite. Questi materiali sono stati ottenuti mediante il trattamento termico di sospensioni ingegnerizzate attivate alcalinamente, costituite da un geopolimero a base di sodio arricchito con polveri reattive γ-Al2O3, nel caso della mullite, e γ-Al2O3 reattivo e talco, nella sintesi della cordierite. La gelificazione è stata studiata allo scopo di ottenere una viscosità appropriata per intrappolare l'aria in condizioni di vigorosa agitazione meccanica o per mantenere la forma dei filamenti negli scaffold ottenuti mediante stampa diretta. In seguito all’ottenimento dei campioni induriti, sono stati estratti gli ioni di sodio mediante scambio ionico in soluzione di nitrato di ammonio. Infine, le schiume sottoposte a scambio ionico sono state convertite in schiume e scaffold di mullite o cordierite pura con l'applicazione di un trattamento di cottura. L'attivazione alcalina è stata la base di partenza per la produzione di granuli leggeri tramite una "tecnica di sferoidizzazione" che consiste nella aggregazione di polveri di vetro sottili su un tamburo rotante, prima del tratamento termico. Una volta indurite, le sospensioni di vetro sodico-calcico ottenute dall’attivazione alcalina sono state ridotte in frammenti e collocate su un tamburo rotante con polvere di vetro secco. Il tratamento termico dei granuli verdi ha determinato una significativa formazione di schiuma, dovuta alla decomposizione dei composti idrati.
Forsgren, Johan. « Functional Ceramics in Biomedical Applications : On the Use of Ceramics for Controlled Drug Release and Targeted Cell Stimulation ». Doctoral thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132377.
Texte intégralFelaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 710
Rees, Catherine Anne. « Mechanisms and kinetics of gel formation in geopolymers ». 2007. http://repository.unimelb.edu.au/10187/3330.
Texte intégralChapitres de livres sur le sujet "Geopolymer (GEO)"
Law, D. W., C. Gunasekara et S. Setunge. « Use of Brown Coal Ash as a Replacement of Cement in Concrete Masonry Bricks ». Dans Lecture Notes in Civil Engineering, 23–25. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_4.
Texte intégralWang, Huicong, Jialiang Yao, Yi Lin et Hua He. « Research of Geopolymer Deal with the Strength of Soft Soil and Microstructure Test ». Dans New Developments in Materials for Infrastructure Sustainability and the Contemporary Issues in Geo-environmental Engineering, 204–14. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95774-6_16.
Texte intégralGe, Xiaonan, et Guoping Zhang. « Mechanical Properties of Geopolymers Cured in Saline Water ». Dans New Developments in Materials for Infrastructure Sustainability and the Contemporary Issues in Geo-environmental Engineering, 215–26. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95774-6_17.
Texte intégralProvis, John L., Jannie S. J. van Deventer et Grant C. Lukey. « A Conceptual Model for Solid-Gel Transformations in Partially Reacted Geopolymeric Systems ». Dans Advances in Ceramic Matrix Composites X, 47–70. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118408353.ch6.
Texte intégralGluth, G. J. G., P. Sturm, S. Greiser, C. Jäger et H. C. Kühne. « One-Part Geopolymers and Aluminosilicate Gel-Zeolite Composites Based On Silica : Factors Influencing Microstructure and Engineering Properties ». Dans Proceeding of the 42nd International Conference on Advanced Ceramics and Composites, 183–96. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2019. http://dx.doi.org/10.1002/9781119543381.ch17.
Texte intégralActes de conférences sur le sujet "Geopolymer (GEO)"
Alanqari, Khawlah, Abdullah Al-Yami et Vikrant Wagle. « Preparation of a Synthetic Geo-Polymer Based LCM Utilizing Saudi Arabian Volcanic Ash for a Sustainable Development : Method, Lab Testing and Applications ». Dans ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-104959.
Texte intégralRen, Xin, et Lianyang Zhang. « The Complete Recycling of Waste Concrete to Produce Geopolymer Concrete ». Dans Geo-Chicago 2016. Reston, VA : American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480151.011.
Texte intégralClements, Cara, Isabelle Goetz, Ahmadreza Hedayat et Lori Tunstall. « High Temperature Treatment to Improve Hydrolytic Stability of Mine Tailing-Based Geopolymer Bricks ». Dans Geo-Congress 2024. Reston, VA : American Society of Civil Engineers, 2024. http://dx.doi.org/10.1061/9780784485330.011.
Texte intégralMunthir, Hammad H., et Hasan M. Ahmed Albegmprli. « A Review of Shear Strength of Hybrid Fiber Reinforced Geopolymer Concrete under Ambient Condition ». Dans 3rd International Conference of Engineering Sciences. Switzerland : Trans Tech Publications Ltd, 2023. http://dx.doi.org/10.4028/p-voj8ko.
Texte intégralSanusi, O., B. Tempest et V. O. Ogunro. « Mitigating Leachability from Fly Ash Based Geopolymer Concrete Using Recycled Concrete Aggregate (RCA) ». Dans Geo-Frontiers Congress 2011. Reston, VA : American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/41165(397)135.
Texte intégralNikvar-Hassani, Arash, et Lianyang Zhang. « Development of a New Geopolymer Based Cementitious Material for Pumpable Roof Supports in Underground Mining ». Dans Geo-Congress 2020. Reston, VA : American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482797.032.
Texte intégralSrinivasula Reddy, M., P. Dinakar, B. Hanumantha Rao, B. K. Satpathy et A. N. Mohanty. « A Study on the Effect of Oxide Compositions on the Compressive Strength Characteristics of Geopolymer Concrete ». Dans Geo-Chicago 2016. Reston, VA : American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480151.001.
Texte intégralDisu, Adedeji A., Prabir Kolay, Vijay Puri et Sanjeev Kumar. « Effect of Polypropylene Fiber and Curing on the Unconfined Compressive Strength of Geopolymer Stabilized Kaolin Clay ». Dans Geo-Congress 2022. Reston, VA : American Society of Civil Engineers, 2022. http://dx.doi.org/10.1061/9780784484012.015.
Texte intégralInti, Sundeep, Megha Sharma et Vivek Tandon. « Ground Granulated Blast Furnace Slag (GGBS) and Rice Husk Ash (RHA) Uses in the Production of Geopolymer Concrete ». Dans Geo-Chicago 2016. Reston, VA : American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480137.059.
Texte intégralPavithra, P., M. Srinivasula Reddy, P. Dinakar, B. Hanumantha Rao, B. K. Satpathy et A. N. Mohanty. « Effect of the Na 2 SiO 3 /NaOH Ratio and NaOH Molarity on the Synthesis of Fly Ash-Based Geopolymer Mortar ». Dans Geo-Chicago 2016. Reston, VA : American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480151.034.
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