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Rozprawy doktorskie na temat „Cement clinkers”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 lipca 2024

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1

Peterson, Vanessa Kate. "Diffraction investigations of cement clinker and tricalcium silicate using Rietveld analysis /." Electronic version, 2003. http://adt.lib.uts.edu.au/public/adt-NTSM20040830.173127/index.html.

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Thesis (Ph. D.)--University of Technology, Sydney, 2003.<br>"Submited for the degree of Doctor of Philosophy, University of Technology, Sydney, Dept. of Chemistry, Materials and Forensic Sciences, August 2003" Bibliographic references: leaves 224-232.

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Skalamprinos, Solon. "Hydration of calcium sulfoaluminate cements." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=234036.

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The necessity to reduce CO2 emissions has increased the driving force for the cement research community to develop alternatives to traditional Portland cement (PC). One of the alternative cements being investigated is calcium sulfoaluminate cement (CS ̅A), first developed commercially in China in the 1970's. CS ̅A cements are produced by clinkering together limestone, bauxite, clay and calcium sulfate to produce mainly ye'elimite (C4A3S ̅) and belite (C2S). Due to the presence of ye'elimite, SO3 content is typically between 6 – 10 wt%. The abundance of elemental sulfur arising from the desulfu

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Swart, Dustin W. "The utilization of alternative fuels in the production of Portland cement." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/SWART_DUSTIN_26.pdf.

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Akkapeddi, Srikanth Schindler Anton K. "Alternative solid fuels for the production of Portland cement." Auburn, Ala., 2008. http://hdl.handle.net/10415/1432.

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Wilson, William S. M. Massachusetts Institute of Technology. "Grinding of cement clinkers : linking multi-scale fracture properties to system chemistry, mineralogy and microstructure." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82861.

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Thesis (S.M.)--Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 162-172).<br>Growing environmental concerns encourage the cement industry to improve its environmental performance, which in turn renews the interest in clinker grinding efficiency. Current knowledge on clinker grinding was built over the past decades, but contributions from fracture mechanics remained limited. This research aimed to contribute to this field by investigating industrial clinkers with

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6

Puthur, Jayapalan Amal Raj. "Properties of cement-based materials in the presence of nano and microparticle additives." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49104.

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Cement clinker production is a highly resource and energy intensive process and contributes substantially to annual global anthropogenic greenhouse gas emissions. One potential pathway to reduce the environmental footprint of cement-based materials is through the reduction of clinker content in concrete by partial replacement of cement with fillers. In this investigation, the partial replacement of cement with chemically inert nano and microsized fillers of titanium dioxide (TiO₂) and limestone was examined. The effects of nano and micro fillers on early-age properties, long-term properties, p

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Van, Rompaey Gilles. "Etude de la réactivité des ciments riches en laitier, à basse température et à temps court, sans ajout chloruré." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210780.

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Le ciment Portland est de loin le liant hydraulique le plus connu et utilisé depuis de très nombreuses années tant dans le secteur de la construction civile qu’au niveau du stockage des déchets (barrières ouvragées ou matériau de confinement). Le processus industriel qui donne naissance au clinker, constituant de base du ciment Portland, n’a pas subi de modifications depuis des décennies. <p>Par ailleurs, au cours de ces dernières années, certaines considérations telles que le réchauffement climatique et le développement durable ont mis à mal les industries qui émettent des gaz à effets de ser

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8

Boulot, Karine. "Les éléments mineurs dans le procédé cimentier." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL149N.

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Du potassium, sodium, soufre et chlore passent en phase gazeuse dans les fours de cimenterie. Ils circulent alors a contre courant de la matière, se condensent dans les zones plus froides du four, sont repris par le circuit matière et retournent en zone chaude. Ils constituent une charge circulante perturbant la cuisson. Or, il devient économiquement intéressant d'utiliser des matières et combustibles à fortes teneurs en éléments volatils. Il s'avère alors nécessaire d'en maitriser la recirculation. - introduction : mise en évidence des problèmes industriels lies a la recirculation. - éléments

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9

Champenois, Jean-Baptiste. "Etude de l’hydratation des ciments sulfo-alumineux par des solutions de borate de sodium : de la spéciation du bore au retard à l'hydratation." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20252/document.

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Dans le circuit primaire des réacteurs nucléaires à eau pressurisée, le bore participe au contrôle des réactions de fission. Le traitement de cette solution génère des déchets aqueux contenant une forte concentration en bore (de 1 à 3 mol/L). Le conditionnement de ces déchets à l'aide d'un ciment silico-calcique est compliqué par le fort pouvoir retardateur des ions borate sur l'hydratation du liant. Un traitement des déchets à la chaux est nécessaire pour précipiter les ions borate sous forme d'hexahydroborite. Cette stratégie, si elle limite le retard d'hydratation, ne le supprime pas. Par a

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10

Krour, Hichem. "Recyclage du ciment dans le ciment : incorporation des déchets de construction et de démolition dans le cru cimentier." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0008.

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Le projet Européen « SeRaMCo » vise à la fabrication d’éléments préfabriqués en béton contenant des granulats recyclés et du ciment « recyclé ». Ce ciment est fabriqué en incorporant des déchets de construction et de démolition dans le cru cimentier, notamment la fraction fine qui est la plus riche en pâte de ciment durci. Cette thèse de doctorat a permis de mieux comprendre l’impact de la variabilité chimique et minéralogique des granulats recyclés sur le taux d’incorporation et sur la proportion des autres constituants du cru. Les synthèses en laboratoire et caractérisations associées ont pe

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11

Guo, Zongqi. "Coatability of cement clinker on basic refractories." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ60938.pdf.

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12

Eriksson, Matias. "Sustainability measures in quicklime and cement clinker production." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-112842.

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This thesis investigates sustainability measures for quicklime and cement clinker production. It is the aim of this thesis to contribute to the effort of creating a more sustainable modus of industrial production. The methods used comprises process simulations through multicomponent chemical equilibrium calculations, fuel characterization and raw materials characterization through dynamic rate thermogravimetry. The investigated measures relate to alternative fuels, co-combustion, oxygen enrichment, oxyfuel combustion, mineral carbonation and optimizing raw material mixes based on thermal decom

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13

Vikström, Amanda. "Separate Calcination in Cement Clinker Production : A laboratory scale study on how an electrified separate calcination step affects the phase composition of cement clinker." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184038.

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Cement production is responsible for around 7% of the global anthropogenic carbon dioxide emissions. More than half of these emissions are due to the unavoidable release of carbon dioxide upon thermal decomposition of the main raw material limestone. Many different options for carbon capture are currently being investigated to lower emissions, and one potential route to facilitate carbon capture could be the implementation of an electrified separate calcination step. However, potential effects on the phase composition of cement clinker need to be investigated, which is the aim of the present s

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14

Hökfors, Bodil. "Phase chemistry in process models for cement clinker and lime production." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-86004.

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The goal of the thesis is to evaluate if developed phase chemical process models for cement clinker and lime production processes are reliable to use as predictive tools in understanding the changes when introducing sustainability measures. The thesis describes the development of process simulation models in the application of sustainability measures as well as the evaluation of these models. The motivation for developing these types of models arises from the need to predict the chemical and the process changes in the production process, the impact on the product quality and the emissions from

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15

Galleguillos, Fuenzalida Francisco Antonio. "Estudio de variables operacionales en un horno rotatorio piloto para la empresa IDIEM." Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/171021.

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Memoria para optar al título de Ingeniero Civil Químico<br>En el presente trabajo, se busca la puesta en marcha de un horno rotatorio, perteneciente a la empresa IDIEM, estudiando las distintas variables operacionales y como estas afectaron finalmente al clínker. Este proyecto se realizó con el fin de generar futuros servicios a empresas cementeras del país. Para esto se realizó un estudio bibliográfico, la descripción de metodología, posterior entrega y análisis de resultados, para finalizar entregando las conclusiones y mejoras al equipo. El cemento es un material cerámico fino que, al tene

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16

GALIMBERTI, MATTEO. "ADVANCES IN ORDINARY PORTLAND CEMENT CLINKER: REDUCING THE ENVIRONMENTAL IMPACT OF THE PRODUCTION PROCESS." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/478904.

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Ordinary Portland cement (OPC) clinker production process has a remarkable environmental impact in terms of energy consumption, raw materials exploitation and greenhouse gases emissions. The present thesis deals with advances in the characterization and formulation of OPC clinker raw meals, the limestone and clay minerals mixture that is thermally treated in the rotary kiln to obtain cement clinker. The purpose is to better understand some key points of the clinkerization, in order to reduce the environmental impact of the production process. First, the influence of limestone petrography and c

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17

Hermansson, Anton. "Standardization and optimization of index for 28 day strength for cement made from standard clinker." Thesis, KTH, Kemiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-272830.

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This project regards the prediction of 28 day compressive strengths of cement. Using traditional multivariate analysis in combination with Artificial Neural Networks indexes have been developed which makes these predictions possible. Compressive strength is highly dependent on the cement hydration and clinker reactivity and literature on these topics have been studied followed by statistical analyses in Unscrambler X (Camo AS) and the Neural Networks model developed at Heidelberg Technology Center (HTC). After studying the theory behind compressive strength, some key parameters are identified

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18

Wang, Jia. "Hydration mechanism of cements based on low-CO2 clinkers containing belite, ye’elimite and calcium alumino-ferrite." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10169/document.

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L’objectif de ce travail a été d’apporter une meilleure compréhension des mécanismes réactionnels de l’hydratation de ciments appartenant à la famille de ciment BCSAF afin de développer des schémas réactionnels simplifiés permettant d’optimiser les ciments à base d’un clinker BCSAF et d’autres constituants pour des applications spécifiques. Les ciments étudiés ont été réalisés à partir d’un clinker contenant 52% de belite, 33% de ye’elimite and 14% de ferrite et diverses quantités d’anhydrite et de calcaire. A partir de l’étude détaillée de l’hydratation d’un ciment contenant 95% de clinker et

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Herterich, Julia. "Microstructure and phase assemblage of low-clinker cements during early stages of carbonation." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/17717/.

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Though it is well established that a reduced rate of hydration is observed in composite cement materials, both the PC and the SCM will hydrate simultaneously, there is still a significant lack of knowledge regarding the early age kinetics of the reactions taking place. This becomes of great importance when considering the early removal of formwork in practice, where the reliance is on models established for PC systems. A comprehensive understanding of the complex relationship between slower composite hydration, drying of the sample surface and phase carbonation kinetics is imperative. Current

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20

Terblanche, Ulrich. "Effective Use of Excess Heat in a Cement Plant." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104080.

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The report investigates the feasibility of accessing waste heat at kiln 7 in the Cementa AB cement plant in Slite, Gotland. The background is provided, with a description of the cement manufacturing process. Most of the report concerns itself with the heat transfer capabilities of the plant, therefore a short description of the heat flow within the most essential equipment is provided. The investigation follows a set of steps to derive the conclusion. The first step investigates previous studies to obtain the three most feasible heat sources. The second step investigates the available heat of

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21

Walter, Martin. "Vlastnosti portlandských cementů s ohledem na ekonomickou a ekologickou efektivitu výroby." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225915.

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Diploma thesis discusses about design composition and firing process modification of belite clinker. It also deals with the summary of knowledge about chemistry and production technology of portland cements with respect to its ecology and economy.

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Brzobohatý, Lukáš. "Odloučení dopravního vzduchu surovinové moučky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230833.

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The dissertation is focused on the applied technical and economic analysis of the influence separation of transport air from raw meal on the economy clinker/cement production, in specific cement production. The analysis is performed on the basis of a detailed understanding and analysis of the function of each component of the technology of cement production, which are affected by separation of transport air from raw meal, mainly the dosing and preheat system of the raw meal. The results of the analysis show a significant effect (impact) separation of transport air on the production costs.

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Halešová, Adéla. "Studium tvorby a kinetiky hydratace belitického slínku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265435.

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DIPLOMA THESIS IS DEVOTED TO THE STUDY OF PREPARATION OF PURE BELITE CLINKER FOR THE POTENTIAL INCREASE OF KINETICS OF THE HYDRATION PROCESS BY CHEMICAL ACTIVATION. THE THESIS OF THIS WORK IS BASED ON RESEARCH FINDINGS CONCERNING BELITE CLINKER AND RESEARCH AT THE INSTITUTE OF THD. THE THESIS AIMS TO DESIGN COMPOSITION OF THE RAW MEAL BURNING BELITE, FOLLOWING MODIFICATION BY SULPHATE AND POTASSIUM CARBONATE IN ORDER TO POTENTIALLY INCREASE THE REACTIVITY OF THE BURNT BELITE CLINKER AND THE LABORATORY FIRING OF PREPARED SAMPLES. THE LAST STEP WAS TO ASSESS THE MINERALOGICAL COMPOSITION OF BURN

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24

Magrla, Radek. "Modifikace vlastností portlandských cementů orientovaná na snížení emisí CO2." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225907.

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This thesis aims to burn raw material with a lower content of carbonate component for the production of Portland cement. Substitution of carbonate component is done by fluidized fly ash. The model cements are tested of basic technological properties and the hydration process is observed.

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Camalan, Mahmut. "Size-by-size Analysis Of Breakage Parameters Of Cement Clinker Feed And Product Samples Of An Industrial Roller Press." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614594/index.pdf.

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The main objective in this study is to compare breakage parameters of narrow size fractions of cement clinker taken from the product end and feed end of industrial-scale high pressure grinding rolls (HPGR) in order to assess whether the breakage parameters of clinker broken in HPGR are improved or not. For this purpose, drop weight tests were applied to six narrow size fractions above 3.35 mm, and batch grinding tests were applied to three narrow size fractions below 3.35 mm. It was found that the breakage probabilities of coarse sizes and breakage rates in fine sizes were higher in the HPGR p

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Feizi, Sedige, and Fateha Yasmin Khan. "Study of crack width within a suspended concrete slab with different amount of cement clinker considering lower climate impact." Thesis, KTH, Betongbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-222024.

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This master thesis investigates the possibility of using a concrete recipe with only 70 % cement clinker for a building project named Gretas Glänta, regarding the demands of cracking for a suspended slab. The requirement to fulfill was a maximum crack width of 0.2 mm due to drying shrinkage and long- term loading. The purpose of using a lower amount of cement clinker in the concrete mix is to reduce the climate impact from the concrete. The thesis considers material testing and modelling of different concrete recipes with variation of the amount of cement clinker. Fly ash was used as the alte

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Spurný, Marek. "Účinnost přídavků mletí používaných při výrobě Portlandských cementů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401836.

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This work deals kinetics of grinding Portland cement clinker which is influenced by addition of grinding inlays surfactants. In an experiment, attritor-type stirred mill was used and surface active grinding additives such as polyethylenglykol (PEG), triethylamin (TEA) and acetate of ammonium were utilized. Granulometric distribution graph obtained from laser diffraction analysis provides data for plotting development diagrams for milling process.

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Esnault, Vivien. "Compréhension et modélisation du comportement du clinker de ciment lors du broyage par compression." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1027/document.

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On appelle clinker le matériau obtenu par cuisson de calcaire et d'argile et qui constitue le principal ingrédient du ciment Portland, composant essentiel de la majorité des bétons produits dans le monde. Ce clinker doit être finement broyé avant de pouvoir présenter une réactivité suffisante. La maîtrise des procédés de broyage représente un enjeu considérable pour l'industrie cimentière : il s'agit du premier poste en termes de consommation électrique d'une usine, en partie du fait de l'inefficacité des procédés employés. Les techniques de broyage par compression, apparues au cours des année

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Naranjo, Cabello Óscar Ignacio. "Modelamiento geológico y estimación de recursos, Yacimiento La Niña, Tongoy, Cementos Melón S.A." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/148670.

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Geólogo<br>En este estudio se presentan los resultados del modelamiento geológico y estimación de recursos de 〖CaCO〗_3 en el yacimiento La Niña, ubicado en Tongoy Región de Coquimbo, perteneciente a la empresa Cementos Melón SA. Por otro lado, este trabajo incluye la estimación de las concentraciones de Cl dentro del yacimiento, debido a que, altas concentraciones de Cl (>0.025%) son perjudiciales para los procesos de fabricación de cemento. Para la elaboración de un modelo geológico y estimación de recursos más preciso, durante los meses de enero y febrero del 2017, se realiza la campaña de

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Yilmaz, Mustafa. "A Study On The Utilization Of Waste Cement-bonded Wood Particle Board As A Raw Material And A Secondary Fuel In Cement Manufacturing." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614695/index.pdf.

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A considerable amount of waste is obtained as a result of edge-cutting operations during cement-bonded wood particle board (CBWPB) manufacturing. This waste material which basically contains wood chips and hydrated cement has to be disposed of and does not have any economical value. However, it can be burned in cement rotary kilns and may result in energy savings to a certain extent due to the presence of wood particles as a secondary fuel and since the hydrated cement may be decomposed and then reform clinker compounds during the calcination process. In this experimental study, the possibil

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Martykán, Jiří. "Sledování vývoje AFt fází ve směsných portlandských cementech s fluidním popílkem." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240190.

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Mejeoumov, Gleb Gennadievich. "Improved cement quality and grinding efficiency by means of closed mill circuit modeling." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2478.

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Staněk, Theodor. "Vztah parametrů přípravy belitického cementu a jeho hydraulických vlastností." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-233286.

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The dissertation thesis is devoted to the study of belite clinkers and to the possibilities of the increase in their hydraulic activity. The mechanism and the kinetics of belite clinker formation were studied together with the relation of the velocity of these processes and the hydraulic activity of clinker. The influence of various parameters (degree of lime saturation, duration and temperature of burning) of the belite clinker preparation on the belite clinker development in time, on belite polymorphism, on the chemical composition of belite crystals and on the belite cement hydraulic activi

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Escadeillas, Gilles. "Les ciments aux fillers calcaires : contribution a leur optimisation par l'etude des proprietes mecaniques et physiques des betons fillerises." Toulouse 3, 1988. http://www.theses.fr/1988TOU30053.

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Il ressort de l'etude que: les proprietes rheologiques avant prise du liant sont ameliorees par l'ajout de filler, autorisant une diminution de la teneur en eau de gachage; la reactivite de la calcite est confirmee (formation de carboaluminates, diminution de l'aureole de transition); les resistances mecaniques aux jeunes ages sont ameliorees; la fragilite (fissuration. . . ) est attenuee. On envisage l'amelioration de ces procedes par addition d'un superplastifiant

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Mončeková, Miroslava. "Možnosti redukce šestimocného chromu při hydrataci portlandského cementu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216811.

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The issue of Hexavalent chromium toxicity to Portland cement hydration is a very actual these days. It takes much effort to obtain a cement containing Cr(VI) less than 2 ppm. The primary objective of this diploma theses is to find appropriate reducing substances and specify their efficiency, as well as to make an attempt to optimize their dosage. As reducing substances there were plumbed sulphites and tin(II) salts. The influence of reducing substances applied to the hydration and cement properties were validated by strenght tests, the calorimetric measurement and the volume-variation measurem

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AQUINO, AFONSO R. de. "Caracterizacao e estudo termoanalitico de clinquer produzido em industrias brasileiras." reponame:Repositório Institucional do IPEN, 1996. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10800.

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Made available in DSpace on 2014-10-09T12:44:08Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:00Z (GMT). No. of bitstreams: 1 02948.pdf: 2171704 bytes, checksum: 896d566852d96a5900bc907e2d478a43 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Química - Universidade de São Paulo - IQ/USP

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Schönberger, Harald [Verfasser], and Harald [Akademischer Betreuer] Garrecht. "State of the art of the co-incineration of waste-derived fuels and raw materials in clinker/cement plants / Harald Schönberger ; Betreuer: Harald Garrecht." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2021. http://d-nb.info/1236574028/34.

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Bordy, Arthur. "Influence des conditions thermo-hydriques de conservation sur l'hydratation de matériaux cimentaires à base d’une fine recyclée." Thesis, Cergy-Pontoise, 2016. http://www.theses.fr/2016CERG0876/document.

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La valorisation, comme granulats, des matériaux issus du recyclage du béton de démolition contribueà diminuer les surfaces dédiées au stockage des déchets et à limiter le recours systématique auxressources naturelles. L’emploi de fines recyclées à partir de béton de déconstruction s’inscrit danscette démarche et permet par ailleurs, quand la fine est utilisée en substitution partielle du cimentlors de la fabrication de nouveaux matériaux cimentaires, de réduire l’impact sur l’environnement deces matériaux.Cet usage conduit à mettre en présence dans la pâte à l’état frais du ciment anhydre et d

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Kozlová, Romana. "Možnosti využití popílků po SNCR pro výrobu portlandského cementu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240583.

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The Master thesis deals with utilization possibilities of fly ash after selective non-catalytic reduction (SNCR) process for Portland cement preparation as a correction component to the raw material with regard to contaminated fly ash by ammonium sulphate or ammonium hydrogensulfate that is one of the products from SNCR process. Presented thesis was focused on behaviour of raw meal with ammonia hydrogensulfate contaminated fly ash after SNCR during burning of Portland clinker in simulated kiln conditions. The thesis deals with Portland clinker preparation from this kind of raw mix and it studi

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Havlík, Leoš. "Příprava a vlastnosti belitického slínku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392334.

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DIPLOMA THESIS IS FOCUSED ON THE PREPARATION AND PROPERTIE OF BELITE CLINKER. IT IS BASED ON THE STUDY OF SCIENTIFIC ARTICLES DEALING WITH THE ABOVE MENTIONED TOPIC AS WELL AS THE ANALYSIS OF THE BRNO THD INSTITUTE´S RESEARCH RESULTS. AS PART OF MY EXPERIMENTAL WORK, A PROPOSAL OF THE COMPOSITION OF RAW MEAL TO EXTRACT BELITE CLINKER IN THE PRESENCE OF POTASSIUMS CARBONATE AND SULPHATE WAS MADE TO MODIFY RAW MEAL. THE PURPOSE OF MODIFYING RAW MEAL IS A POTENTIAL INCREASE IN BELITE CLINKER REACTIVITY. FURTHER THE EXTRACTION OF BYPASS DUST FROM A LOCAL CEMENT PLANT WAS CONDUCTED. THE EVALUATION

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Rheinheimer, Vanessa. "A nanoscale study of dissolution and growth processes in cement hydrates." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/285965.

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This thesis aims at providing new knowledge on the, otherwise poorly known, molecular-scale mechanisms that operate during hydration of cement phases and dissolution of their hydrates. In order to pursue this objective, a novel approach has been followed, including the development of a new procedure to synthesize thin films of calcium silicates, real time characterization of grain growth and dissolution with liquid-cell atomic force microscopy, and monitoring of their chemical evolution by X-ray photoelectron spectroscopy of thin films hydrated in-situ, avoiding atmospheric contamination. Nano

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Недашковська, Богдана Анатоліївна. "Обертова піч 4х60 з модернізацією футеровки". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/30753.

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Метою магістерської дисертації є удосконалення конструкції корпусу обертової печі шляхом збільшення теплового опору футерівки. Об’єктом дослідження є піч обертова 4x60 при виробництві цементу «сухим» способом. Предмет дослідження встановлення додаткової теплоізоляції в футерівку печі для зменшення втрат тепла в навколишнє середовище. У магістерській дисертації зроблений вибір та обґрунтування модернізації обертової печі, що зменшує втрати тепла за рахунок чого можливо зменшити витрати палива та збільшити продуктивність печі. Теоретичні ідеї модернізації підтверджуються результатами розрах

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Hrdina, Matěj. "Ověření možnosti syntetické přípravy ettringitu a thaumasitu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227221.

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The work is focused on the possibilities of using FBC fly ash for composite cements, monitoring their hydration processes, especially the creation of AFt phase. The possibility of preparing synthetic ettringite and thaumasite and their detection.

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Mungyeko, Bisulandu Baby-Jean Robert. "Modélisation de l'apport d'énergie par combustibles alternatifs dans les fours tournants de production de ciment." Thesis, Pau, 2018. http://www.theses.fr/2018PAUU3001/document.

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En raison de l'épuisement des combustibles fossiles et en raison de son coût croissant, les déchets ont été utilisés comme combustibles alternatifs dans les fours rotatifs à ciment pendant plusieurs années. Afin de répondre aux exigences de protection de l'environnement et de qualité du produit final, il est nécessaire de comprendre et de quantifier les différents processus intervenant dans le four. Dans le cadre de cette thèse, nous nous sommes intéressés à la substitution partielle des déchets (pneus usés et Refuse Derived Fuel « RDF ») et biomasse (résidus d’agriculture) dans les fours tour

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Mantegazza, Ezio. "Aspectos ambientais do co-processamento de resíduos em fornos de produção de clínquer no Estado de São Paulo." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-18022016-100234/.

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A geração de resíduos sólidos é inerente ao desenvolvimento humano. O concreto armado é um dos materiais mais utilizados pelo homem e tem o cimento Portland como seu principal constituinte, o qual é produzido pela moagem de clínquer e gesso. O clínquer pode ser definido como um mineral artificial, obtido a partir das reações físico-químicas de calcário, argila e corretivos a altas temperaturas, em forno rotativo industrial, mediante a queima de combustíveis fósseis. No início da década de 70 foram realizadas as primeiras experiências de substituição de combustíveis fósseis por resíduos industr

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Kašpárková, Kateřina. "Vliv oxidů těžkých kovů na tvorbu a vlastnosti portlandského slínku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240407.

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The Master’s thesis is focused on a study of the effect of increased content of heavy metals present in a raw meal on the formation and properties of prepared clinker and acquired cement. Main attention is devoted to changes on the physical, mechanical, microstructural and hydration properties. The theoretical part contains an overview of clinker minerals occurring in Portland cement including the possibility of incorporation of heavy metals into their structure and affecting the properities of the cement. In the experimental part, there is compared the effect of heavy metal oxides on the comp

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Joca, Jhonny Frank Sousa. "Determinação de manganês em amostras de cimento e clínquer por voltametria de redissolução catódica empregando eletrodos de ouro." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-31082011-160037/.

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Este trabalho apresenta o desenvolvimento e a aplicação de um método alternativo para determinação de manganês em amostras de cimento e clínquer por voltametria de redissolução catódica por onda quadrada empregando eletrodos de ouro. Após estudos exploratórios acerca do comportamento eletroquímico do manganês no eletrólito suporte H3BO3 0,20 mol L-1 / KCl 0,10 mol L-1 com pH 6,5 e a otimização dos parâmetros operacionais para a voltametria de onda quadrada, foram obtidos excelentes resultados na determinação de manganês nas amostras analisadas. Destacam-se a ótima linearidade, verificada em du

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Martins, Helena Margarida. "Reabilitação energética da indústria cimenteira portuguesa." Master's thesis, ISEG, 2002. http://hdl.handle.net/10400.5/22152.

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Mestrado em Economia e Política da Energia e do Ambiente.<br>A indústria cimenteira é um dos sectores mais intensivos em energia da economia Portuguesa. E também um sector intensivo em capital, dados os custos elevados com a energia e o facto de exigir grandes investimentos na construção das instalações e na aquisição e manutenção do equipamento básico. Actualmente, os principais impactes ambientais associados à produção de cimento são a exploração das pedreiras e as emissões de poluentes atmosféricos e de gases com efeito de estufa. O presente trabalho analisa a indústria cimenteira naciona

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Schöler, Axel [Verfasser], Horst-Michael [Akademischer Betreuer] [Gutachter] Ludwig, Barbara [Gutachter] Lothenbach, and Yuanzheng [Gutachter] Yue. "Hydration of multi-component cements containing clinker, slag, type-V fly ash and limestone / Axel Schöler ; Gutachter: Horst-Michael Ludwig, Barbara Lothenbach, Yuanzheng Yue ; Betreuer: Horst-Michael Ludwig." Weimar : F. A. Finger-Institut für Baustoffkunde, 2016. http://d-nb.info/1117091201/34.

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Cáceres, Alberto Eulogio Arias. "Caracterização da matéria-prima (Grupo Itapucumí) e sua queimabilidade para a produção de cimento Portland na industria nacional del cemento (Paraguai)." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/44/44137/tde-25042018-161847/.

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O presente trabalho consiste na detalhada caracterização geológica da Mina de Vallemí no Paraguai, utilizada para fabricação de cimento Portland pela Industria Nacional de Cemento (INC), seguida da caracterização das matérias-primas, por petrografia e análises químicas e mineralógicas, e posteriores testes de queimabilidade de seis farinhas experimentais, elaboradas com misturas das matérias-primas disponíveis. As farinhas foram sinterizadas e avaliadas qualitativamente, por microscopia do clínquer, e quantificadas por difração de raios-X (DRX) e método de Rietveld. A geologia da mina consiste

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