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Dissertations / Theses on the topic 'Cement raw materials'

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Published: 5 June 2025
Last updated: 1 August 2025

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1

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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2

Hamood, Alaa. "Sustainable utilisation of raw sewage sludge (RSS) as a water replacement in cement-based materials containing unprocessed fly ash." Thesis, University of Wolverhampton, 2014. http://hdl.handle.net/2436/332182.

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Prior to the implementation of the European Union Urban Waste Water Treatment Directive (91/271/EEC) in 31 Dec 1998, around a quarter of the sewage sludge produced in the UK was either discharged to surface waters via pipes or disposed from ships at sea. Discontinuing this route together with the quality requirements of the European Waste Water Directive, led to the generation of significant quantities of sewage sludge. It has therefore become required to treat this waste effectively before it can be sent back to the environment. Consequently, this added greater challenges for the environmenta
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3

Švec, Jiří. "Možnosti využití odkalů po vypírce vápence." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216744.

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In modern point of view of waste management is desirable to effectively process the grates possible amount of wastes. Sediments from cleaning of mined lime stones contains a lot of clay components, but there is also indispensable share of soft calcite. This composition makes these sediments a promising material for preparation of hydraulic binders. Production of common hydraulic binders, especially Portland cement, is very energy-intensive plus loads environment with considerable amount of combustion gases, therefore it is necessary to explore possibilities of alternative low - energy binders
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4

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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5

Havelka, Jaroslav. "Studium možností separace chloridů z by-passových odprachů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316367.

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The thesis deals with the study and the characterization of bypass dusts from the cement plants. The aim of the thesis is to search for the possibilities of the usage of that secondary product by means of the cement production. The thesis focuses mainly on the determination of the amount of soluble substances in the dusts, the dependence of dissolution of the soluble share on water – dust ratio, the dependence of dissolution time on the yield of the soluble share and the influence of the temperature on the yield. The physical and chemical properties of the investigated samples taken from sever
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6

Toman, Boris. "Vývoj anortitové keramiky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225891.

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When firing calcium ceramic materials creates a new crystalline phase anorthite. It can significantly improve the properties of ceramic body. This work deals with the possibilities of development anortitové ceramics using non-plastic raw materials, particularly alumina cement compared with conventional ceramics based on mullite.
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7

Opravilová, Lenka. "Studium vývoje fázového složení v silikátových systémech dostupnými metodami a jejich optimalizace." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-234576.

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One of the most prominent measurable parameters of the development of phases and phase transformations in inorganic systems are undoubtedly the volume changes of silicate matrix. The study of volume changes is crucial in the terms of usable durability of final product. They represent shrinkage or expansion of the material and may lead to significant decrease of technological and ecological parameters and often to complete destruction of these materials. Most often the volume changes can be observed when cement is used as a binder and in concretes, mortars, artificial aggregates and other simil
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8

Urbánek, Libor. "Cementotřískové desky s využitím alternativních surovin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392358.

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The diploma thesis is focused on effective utilization of currently produced alternative raw materials in the production of cement-bonded boards. The emphasis is primarily on the scraps and dust arising from the processing of cement-bonded slabs, as well as on slag and limestone. The theoretical part contains a survey of current knowledge about the given issue. In the experimental part, the alternative raw materials were analyzed in detail and their influence (as modifier components of the matrix and the filler) on the properties of cement-bonded slabs was examined. Research and development to
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9

Ondryášová, Veronika. "Vliv vlastností vstupních materiálů na kvalitu architektonických betonů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371936.

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This diploma thesis focuses on the influence of properties of feedstocks for the production of quality surfaces of architectural concrete. The introductory part describes the definition of architectural concrete with the advantages and disadvantages of its implementation. In the following chapters, the characteristics, the dosage or the chemical composition of the input materials are given. Besides the design of the mixture, important parameters for the creation of a quality surface of concrete are compaction, precise placement in formwork and subsequent treatment of the surface. Individual ty
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10

Snowdon, Roger J. III. "Tension in Space." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1461418173.

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11

Adolfsson, Daniel. "Steelmaking slags as raw material for sulphoaluminate belite cement /." Luleå : Luleå tekniska universitet/Tillämpad kemi och geovetenskap/Processmetallurgi, 2006. http://epubl.ltu.se/1402-1757/2006/72/LTU-LIC-0672-SE.pdf.

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12

Zaťko, Petr. "Vliv rozptýlené výztuže na průběh zrání polymercementových hmot." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265336.

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The diploma thesis is focused on polymercement materials with dispersed reinforcement. The aim of this work is development of suitable polymercement mixture and monitoring of the impact of dispersed reinforcement on the course of maturation of these materials and physico-mechanical properties. The effect of high temperatures on the properties of the mortar is also examined. Emphasis is placed on the use of alternative resources and byproducts. Mixed binder of cement and slag and admixture of microsilica was used. Recycled cellulose was used as dispersed reinforcement and was compared with comm
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13

Kyritsis, Konstantinos. "Synthesis and characterization of high temperature cement-based hydroceramic materials." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3939.

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Cement-based materials are of importance in the construction of geothermal wells and high-temperature oil and gas wells. These materials fill the annulus between the well casing and the rock forming a protective layer, known as sealant, which is used primarily to secure and support the casing inside the well. In addition it prevents entry of unwanted fluids into the well and communication between formation fluids at different levels. These cement based sealants need to perform for many years at high temperatures and in severe chemical environments; conditions which can cause the material of th
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14

Isikli, Yeliz. "Modeling Groundwater Flow In A Raw Material Site Of A Cement Factory,kocaeli-darica,turkey." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1219849/index.pdf.

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An areal numerical simulation has been carried out to investigate effects of below-sea-level (BSL) excavation in the raw material site of a cement factory in Turkey. A finite element model (585 nodes with 534 elements) is formed to solve for the head distribution in the quarry site upon quarry operation planned to be implemented in the near future. The model is calibrated to the field conditions and appropriate boundary conditions and the physical parameters are obtained to be used in future prediction studies. After a successful calibration the model is run to estimate the water levels and th
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15

PARISATTO, MATTEO. "APPLICATIONS OF X-RAY TOMOGRAPHIC TECHNIQUES TO THE STUDY OF CEMENT-BASED MATERIALS." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421653.

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The knowledge of the microstructural properties of cement-based materials plays a fundamental role in predicting their macroscopic behaviour in terms of performance and durability. However, due to the intrinsic microstructural and chemical complexity of such materials, a multi-disciplinary approach is often required. Most classical experimental techniques such as XRD, XRF or mercury porosimetry (MIP) only provide overall information about selected properties (phase and chemical composition, porosity, etc.) but give no indications about their real spatial distribution within the investigated sa
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16

Hudečková, Petra. "Dlouhodobé testy pro ověření odolnosti nátěrových hmot v různých nepříznivých prostředích simulujících reálné vlivy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371935.

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Cement bonded particleboards contain organic base and as they are set outside, extreme weather condition, such as frost, chemical defrosting substances or sulphates, cause their degradation. The presence of the organic base in the matrix of the material could be the reason why there is higher probability of degrading when compared with materials containing an inorganic base. It could be partially eliminated by an appropriate surface modification of the slab, which main goal is to weaken the impact of an aggressive environment and to extend the lifespan of the board. On the other hand, the surf
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17

Soner, Ilker. "Utilization Of Fluidized Bed Combustion Ashes As Raw Material In The Production Of A Special Cement." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610651/index.pdf.

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Fluidized bed combustion (FBC) ashes containing significant amount of free CaO and CaSO4 in addition to valuable inorganic acidic oxide ingredients such as SiO2, Fe2O3 and Al2O3 can be utilized as potential raw materials in the production of nonexpansive belite-rich calcium sulfoaluminate cement which is one of the special cement type of sulfoaluminate-belite cements having performance characteristics similar to those of ordinary portland cement besides lower energy requirements and CO2 emissions during manufacturing. Therefore, in this thesis study, possibility of producing non-expansive beli
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18

Brown, Ashley Vannoy. "Cement Stabilization of Aggregate Base Materials Blended with Reclaimed Asphalt Pavement." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1314.pdf.

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19

Roháček, Lukáš. "Optimalizace složení matrice cementotřískových desek při využití alternativních surovinových zdrojů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371967.

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The diploma thesis deals with possibility of utilization raw materials from alternative sources for production of cement-bonded particleboards. In theoretical part the possibilities of modifying composition of cement-bonded slabs with emphasis on their matrix are discussed in detail. On basis of the findings and their evaluation, waste from the formatting of cement-bonded particleboards, micronized limestone, heat sink and high temperature fly ash were selected to the composition modification. The mentioned raw materials were analyzed and subsequently tested as substitutes for the matrix of ce
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20

Tengattini, Alessandro. "A micro-mechanical study of cemented granular materials." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13973.

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Cemented Granular Materials (CGMs) are ubiquitous in nature. Their behaviour is driven by phenomena occurring at the scale of individual grains and cement bonds. However, the effect of this scale on the engineering response has lacked a systematic description and is rarely acknowledged in the models portraying their behaviour. This dissertation contributes to the development of a methodological framework for CGMs, relating the behaviour of individual grains to their collective response at the macroscopic scale, through a combination of analytical, experimental and numerical approaches. Analy
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21

Zhu, Fenfen. "Technological Development of an Effective Recycling System for Fly Ash from Municipal Solid Waste Incinerator to be Raw Material in Cement Industry." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/66206.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第14148号<br>工博第2982号<br>新制||工||1443(附属図書館)<br>26454<br>UT51-2008-N465<br>京都大学大学院工学研究科都市環境工学専攻<br>(主査)教授 津野 洋, 教授 森澤 眞輔, 教授 酒井 伸一<br>学位規則第4条第1項該当
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22

Melo, Michal. "Analýza možnosti využití odpadů vznikajících při výrobě cementotřískových desek." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225892.

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The content of this diploma thesis is to explore the possibility of utilization of wastes generated in the production of cement-bonded particleboards in terms of their application as secondary raw materials back into the production. At first an attention was focused on a fine-grained waste containing wood particles with cement matrix produced during the final adjustment of boards. Further, fly ash generated from the combustion of wood chips in the biomass boiler is assessed. In the theoretical part the different types of waste generated in the production of cement-bonded particleboards are cha
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23

Konečný, Dalibor. "Vývoj cementotřískových desek s matricí modifikovaného složení." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226706.

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In manufacture of cement-bonded particle boards are in present-days used exclusively wooden particles as filler. This thesis deals with a research of possible substitution of this material, especially of waste emerging by production of CBPB itself. At first is completed a survey of possible substitute fillers and czech and foreign literature, dealing with issues of modification of composition of cement-bonded particle boards. In practical part are tested some treatments of waste and its adding to recipe. Further are analysed the influences of substitution of cement by slag and substitution of
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24

Jiang, Sheng. "Fracture and Fragmentation of Granular Materials Under Impact." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20250.

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Fracturing plays an important role in controlling the compaction behaviour of granular materials under impact. Associated effects include changes to porosity and permeability, especially along earthquake faults, and during mining and petroleum production processes. The overarching objective of this thesis is to understand the intrinsic fracture mechanisms of both pure brittle granular materials and cemented granular materials. Fracture mechanisms are quantitatively analysed in terms of energy dissipation during high speed grain fracture and fragmentation process. Furthermore, the effects of bo
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25

Pasche, Eduardo. "Estudo da resistência e da rigidez de uma mistura de material fresado asfáltico e pó-de-pedra com a adição de cimento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/149836.

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A malha rodoviária brasileira é elemento fundamental para as cadeias produtivas, pois promove a integração de regiões, estados, portos, ferrovias, hidrovias e aeroportos. A qualidade do pavimento é um dos principais determinantes do desempenho dos usuários durante suas viagens. Uma das formas para a correção dos defeitos nos pavimentos é a restauração, sendo bastante empregada atualmente a fresagem do revestimento asfáltico, que consiste na operação de um corte do revestimento asfáltico, esta atividade produz uma grande quantidade de resíduo nas obras de restauração de rodovias, denominado de
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26

Roper, Matthew B. "Evaluation of Laboratory Durability Tests for Stabilized Aggregate Base Materials." BYU ScholarsArchive, 2007. https://scholarsarchive.byu.edu/etd/902.

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The Portland Cement Association commissioned a research project at Brigham Young University to compare selected laboratory durability tests available for assessing stabilized aggregate base materials. The laboratory research associated with this project involved two granular base materials, three stabilizers at three concentration levels each, and three durability tests in a full-factorial experimental design. The granular base materials consisted of an aggregate-reclaimed asphalt pavement blend obtained from Interstate 84 (I-84) and a crushed limestone obtained from U.S. Highway 91 (US-91), w
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27

Dias, Myrna Carvalho. "Influencia da microestrutura e da espessura das ceramicas prensadas na transmitancia da luz e na dureza knoop do cimento resinoso." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289600.

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Orientador: Lourenço Correr Sobrinho, Evandro Piva<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-09T10:27:36Z (GMT). No. of bitstreams: 1 Dias_MyrnaCarvalho_D.pdf: 1118251 bytes, checksum: 3d98e2abfaec81424cc59b34ec8d154e (MD5) Previous issue date: 2007<br>Resumo:O objetivo deste estudo foi avaliar a influência da microestrutura e espessura das cerâmicas prensadas na intensidade e transmitância da luz e na eficiência da polimerização do cimento resinoso de dupla ativação Variolink II, fotoativado através
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28

Cheikh, Sleiman Hani. "Contribution of neutron/X-ray tomography for the drying modeling of cohesive porous media Influence of common simplifications on the drying of cement-based materials up to moderate temperatures". Thesis, Université Grenoble Alpes, 2021. http://www.theses.fr/2021GRALI014.

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Le séchage des matériaux cimentaires affecte directement leur durabilité, ce qui a un impact économique, sociétal et environnemental majeur.Les techniques expérimentales conventionnelles, qui sont utilisées pour étudier les processus de séchage, ne fournissent que des mesures moyennées ou ponctuelles qui ne sont pas suffisantes pour caractériser ces processus intrinsèquement hétérogènes. Cependant, les progrès significatifs dans les techniques de plein champ ont permis une observation sans précédent de ces processus locaux. Notamment, la tomographie par rayons X et neutrons se prête comme des
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29

Leek, Darrell Stewart. "A study of the effects of chloride and sulphate on the hydration of portland cement and the corrosion of carbon steel reinforcement using electron-optical techniques and energy dispersive X-ray analysis." Thesis, Queen Mary, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265400.

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Pires, Gustavo Menegusso. "ESTUDO DA ESTABILIZAÇÃO GRANULOMÉTRICA E QUÍMICA DE MATERIAL FRESADO COM ADIÇÃO DE CIMENTO PORTLAND E CINZA DE CASCA DE ARROZ PARA APLICAÇÃO EM CAMADAS DE PAVIMENTOS." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/7865.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Road transport is of great importance for many countries, in Brazil it can be even more extreme, due to the concentration of cargo through this modal. We also know that maintenance costs are elevated, forcing managers and researchers to find new alternatives to increase the utilization of materials, reduce energy consumption, speed up restoration interventions, among others. Besides the high costs, another important factor that stands out is the environmental issue, which is directly affected in the construction and maintenance of
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Trindade, Guilherme Hoehr. "Influência da incorporação de cinza da casca do arroz e sílica ativa no cimento Portland frente à reação álcali-sílica : desenvolvimento de uma nova proposta de método para avaliação da RAS em materiais suplementares ao cimento Portland." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/131343.

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Alguns materiais, constituídos quase que exclusivamente por sílica, são empregados, de forma suplementar ao cimento Portland, por promoverem melhorias ao concreto, devido aos seus efeitos físicos e pozolânicos, além de atenderem a questões ambientais. No entanto, essa sílica pode gerar produtos indesejados na presença de álcalis, sendo este fenômeno conhecido como reação álcali sílica (RAS). Na presença de água, esses produtos são capazes de expandir no interior da massa de concreto, provocando fissuras internas e externas e, em casos mais graves, a degradação do elemento estrutural. Com a fin
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Dobrovolná, Martina. "Využití vedlejších produktů z výroby cementotřískových desek pro podkladní vrstvy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392347.

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This thesis deals with the use of by–products from the production of cement–bonded particle boards as an alternative raw material for the stabilization of the subsoil or into a ground solid. The theoretical part briefly describes the current status of waste management. A set of alterantive raw materials used to hydraulically cemented mixtures is listed here as well as the recherche of the foreign research is elaborated from this area. The experimental part of the thesis firstly deals with the choice of raw materials and basic recipes. In the advanced stage the laboratory analyses are carried o
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Figala, Petr. "Specifický cementový kompozit na bázi druhotných surovin s důrazem na trvanlivost." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371877.

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Nowadays the attention to the utilization of secondary raw materials as a component of building materials is being paid to in the Czech Republic and in the world. This thesis deals with possibilities of using secondary raw materials as partial cement substitutes in industrial floors. The aim of this thesis is to verify the influence of cement substitution amount with secondary raw materials and their fineness of grinding on the properties of the floor surface in time and on its structure. On the basis of the acquired knowledge, the influence of the pre-treatment of the secondary raw material o
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Zahálka, Milan. "Ověření různých druhů popílků pro výrobu umělého kameniva." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226707.

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Diploma thesis gives an overview of artificial lightweight aggregates based on fly ash. Fly ash such as the residues of coal burning is currently one of the most used secondary raw materials for new building materials for research papers. The results shows that the secondary energy products are not just fully substitute the primary component, but in many cases improves the final properties of building products. Wide complex of fly ashes not only from domestic sources was tested and it`s main properties important for it`s further application was determined. Laboratory production of artificial a
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Hermann, Radek. "Vývoj chemicky odolné stříkané směsi." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392360.

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Production wastes for which a direct use in another production is found become secondary raw materials. There are several institutions in Czech Republic and in the world, which are currently dealing with the issue. This thesis deals with the issue of cementitious spray concrete mixtures and deals with the possibilities of using secondary raw materials and waste from production as partial replacement of binder and filler in these mixtures. The aim of this theses is to optimize the composition of additives in the recipe of the commercially produced pray mixture and to verify the influence of the
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Cachepa, Moisés Mário. "Mitigação da reação álcali-agregado em concreto com o emprego de resíduo de cerâmica vermelha e metacaulim." Universidade do Vale do Rio dos Sinos, 2017. http://www.repositorio.jesuita.org.br/handle/UNISINOS/6360.

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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2017-06-20T12:30:42Z No. of bitstreams: 1 Moisés Mário Cachepa_.pdf: 3004067 bytes, checksum: 24c7ce290fa414a34e3454c918c0403c (MD5)<br>Made available in DSpace on 2017-06-20T12:30:42Z (GMT). No. of bitstreams: 1 Moisés Mário Cachepa_.pdf: 3004067 bytes, checksum: 24c7ce290fa414a34e3454c918c0403c (MD5) Previous issue date: 2017-05-22<br>CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>O uso de adições minerais, como as pozolanas, tem sido adotado como adição ou substituição parcial do cimento, fundamentalmente
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Rossi, Chiara. "Une approche micro-mécanique des matériaux granulaires cimentés." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI016.

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Ce travail de doctorat s'articule autour de l'hypothèse sous-jacente selon laquelle la mécanique la réponse des matériaux granulaires cimentés (c'est-à-dire les matériaux comprenant un squelette granulaire reliés par un réseau de ponts en ciment) est piloté, à l'échelle de l'ingénierie, par le réponse collective des différents grains et ponts de ciment. Si cette observation est généralement considéré comme une évidence, c'est un fait normalement négligé dans la formulation des modèles décrivant leur comportement, qui s'appuient sur des hypothèses phénoménologiques pour formuler leurs relations
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38

Narloch, Danielle Cristine. "Medidas de concentração de radônio proveniente de argamassas de cimento portland, gesso e fosfogesso." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1711.

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CAPES<br>O cimento Portland é bastante empregado na construção civil e apresenta em sua composição o gesso natural. Para minimizar custos é possível substituir parte do gesso desta composição pelo fosfogesso. O fosfogesso é um resíduo gerado a partir da produção dos fertilizantes e é constituído, essencialmente, por cálcio dihidratado e algumas impurezas, como fluoretos, metais em geral e radionuclídeos. Atualmente, toneladas de fosfogesso são armazenadas à céu aberto próximo das indústrias de fertilizantes, causando a contaminação do meio ambiente. O elemento 226Ra, presente nesses materiais,
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39

Dolák, Martin. "Vývoj nových injektážních hmot pro rubovou injektáž kanalizací." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2021. http://www.nusl.cz/ntk/nusl-433585.

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ABSTRACT This thesis deals with the development of silicate based reverse grouts for the purpose of rehabilitation of sewers. The work also examines the possibility of substitution of basic input raw materials with secondary raw materials, meaning replacements of both filler components and binder components. As secondary raw materials, we refer to wastes from the production process which, after the necessary treatment, are used in another production. The development and experimental verification of the functionality of the developed grout was focused mainly on the use of secondary raw material
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Lin, Chih-Hung, and 林志鴻. "Reuse of water treatment plant sludge as cement raw materials." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/33503988142073380458.

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碩士<br>國立中央大學<br>環境工程研究所<br>99<br>The objective of this study was initially aimed to evaluate the feasibility of using PAC and alum sludge, obtained individually in ordinary days and typhoon period from water treatment plants, as raw material for cement production. Then, based on the results of theoretical mixing design analysis of cement raw materials, the cement clinker was prepared when hydraulic modules (H.M.) = 1.7、2、2.3, silicate modules (S.M.) = 1.9、2.6、3.2, and iron modules (I.M.) = 1.5、2、2.5, respectively, and at different substitution rates (0%、50%、100%) of sludge for clay. Finally, t
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Qiu, Wen-Shao, and 邱玟韶. "A Feasibility Study for Substituting Part of Cement Raw Materials by Incinerated Ashes in Making Eco-cement." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/75000787528155029364.

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碩士<br>國立雲林科技大學<br>營建工程系碩士班<br>92<br>Abstract Each year there is great amount of bottom ashes been produced by incinerators all over Taiwan. The major chemical concentrations of bottom ash are oxides of silica, calcium, aluminum, and irons. It is believed that due to the chemical and mineral similarity between incinerated bottom ashes and the raw materials of normal cement, some replacement of raw materials by bottom ashes to produce Eco-cement would be possible. However the heavy metals, sulfate and chlorides embedded in the bottom ashes would affect the characteristics of the new cement. The
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Lin, Ming-Feng, and 林明鋒. "Use of waste foundry sand and stone sludge as cement raw materials." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/76830147834400639562.

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碩士<br>國立中央大學<br>環境工程研究所<br>94<br>The goal of this study is to find the optimal conditions of cement making in order to maximize the replacement of cement clay by ash obtaining from waste foundry sand(including Core sand and glass sand), stone sludge, limestone and ferrate as raw materials. A computational model was used to formulate the composition of the raw clinkers. In this study, the hydration characteristics of these eco-cements and the engineering properties of their pastes, including their compressive strength, speciation and degree of hydration, were studied and compared to those of AS
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Lin, Tung-Tsan, and 林東燦. "The Feasibility Study of Manufacturing Ecocement by Using Sludge as Raw cement Materials." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/82466778969027607665.

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碩士<br>國立中央大學<br>環境工程研究所<br>95<br>This study evaluated preliminarily the feasibility of using marble sludge, sewage sludge, alum sludge, and BOF sludge as raw cement materials by drying sludge and analyzing their physical and chemical characteristics. In addition, to enhance the amounts of sludge used, this study calculated and designed the mix of all kinds of sludge under different cement moduli and sludge usage to produce the ecocement. After that, the kinds of physical and chemical character of cement clinker and cement were analyzed, and the microscopic observation of cement paste was analy
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Dutta, Debabrata. "Utilization of blast furnace slag as a raw material for the manufacture of portland cement clinker." Thesis, 2011. http://ethesis.nitrkl.ac.in/2906/1/debabrata_dutta-_thesis.pdf.

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Presently, there is an increased emphasis on the use of blended cement like slag cement, fly ash cement etc. This reduces the energy requirement for cement production or reduces the CO2 release in the environment as the portland cement clinker is produced utilizing calcium carbonate based raw material. The replacement of calcium carbonate by alternative raw material like slag may again reduce the energy consumption. In the present investigation, blast furnace slag has been utilized as a cement raw material for the production of portland cement clinker. Clinker thus produced has been characteri
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Ma, Chuan-Tsung, and 馬傳宗. "Sustainable Planning of the Bottom Ash been Produced by Li-Ze Incineration Plant in I-Lan County - Study for Substituting Part of Raw Materials by Bottom Ash in Portland Cement." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/70555803740953113252.

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碩士<br>國立宜蘭大學<br>建築與永續規劃研究所碩士班<br>96<br>There are twenty-two incineration plants in Taiwan which are operating now, so garbage (Non-hazardous solid waste) treatment has been changed to incinerator from landfill. Li-Ze Incineration Plant in I-Lan County is one of them. It was operated by I-Lan County government since April 2006. Although Li-Ze Incineration Plant has release the pressure of waste treatment, but there is a problem that is ash residue treatment (include bottom ash and fly ash) must be solved immediately. Almost all of the bottom ash present still takes burying by the time been in I
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46

Shie, Reui-Ren, and 謝瑞仁. "Raw-Material Mix Design of Eco-Cement." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/63376378934454910283.

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碩士<br>國立高雄第一科技大學<br>營建工程所<br>95<br>Cement is traditionally regarded as the index material of construct engineering, but, in the view of ecological issue, its production process was strongly disputed due to the excessive consumption of resource and energy. As a result, how to utilize the ecology design method for the use of waste or industry by-product to substitute the raw materials for cement effectively may be the key subject for the pursuit target of the “sustainable” cement industry. This research first focuses on the development of automatic analysis program of cement raw material as the
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Kuo, Jung-Jen, and 郭容忍. "Recycling MSWI Ash as a Raw Material for Portland Cement." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/tj93pm.

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碩士<br>國立交通大學<br>環境工程系所<br>92<br>In Taiwan, landfill disposal and solidification are two major strategies for MSWI ash disposal. However, MSWI ash is rich in heavy metals and salts, which may cause serious environmental problem if without proper treatment. Recently, cement industry has played an important role in the disposal of solid wastes because it can utilize various kinds of wastes as fuels or raw materials. In addition, the heavy metals can be safely captured in the cement clinker. In this study, the feasibility of incorporating MSWI fly ash and bottom ash into cement clinker was eva
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Tsai, Meng Chang, and 蔡孟昌. "Influence of Sulphates on MSWI Ashes as Cement Raw Material." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/07936908614601734540.

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碩士<br>輔英科技大學<br>環境工程與科學系碩士班<br>97<br>CaO2, SiO2, Al2O3 and Fe2O3 are the major compositions of raw cement, during the high temperature to calcined as the cement materials. In Taiwan, municipal solid waste incinerator (MSWI) clinker’s chemical compositions are similar to cement raw materials, and can be the resource recycled. Nevertheless, sulphates in the MSWI ashes might affect the sintering process of cement crystalline. Further investigation is needed. Various forms of sulphates were added into the cement raw mixes, XRD analysis indicates that both the cement major crystalline phases (C3S
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Lin, Cheng-Hsun, and 林政勳. "Study of Feasibility on Eco-Cement Using Washed and Dried Slurry to Substitute Cement Raw Material." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/95220798228201053515.

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碩士<br>中原大學<br>土木工程研究所<br>105<br>The findings of this study show that it is feasible to manufacture eco-cement by using water washing dechlorinated pasty tailings to replace partial cement iron slag material. Because the pasty tailings contain ferrous carbonate and a little silicon oxide which can be used to manufacture cement. Method to control sintering of eco-cement, the raw material is designed by cement factor as: Hydraulic modulus =2.10, Silica modulus =3.02 and Iron modulus =1.42, when the replaced proportion of iron slag is determined, the required contents of limestone, silica sand, cl
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50

Guo, Tz-Hau, and 郭子豪. "Study on Pretreated MSWI Bottom Ash Utilized as Cement Raw Material." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/36864381491678991947.

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碩士<br>國立成功大學<br>環境工程學系<br>89<br>In Taiwan, a large amount of municipal solid waste incinerator (MSWI) bottom ash (BA) is produced each year. MSWIBA is primarily composed of silicon, calcium, aluminum and iron oxides that are similar to cement raw materials. Utilization of MSWIBA as replacement of cement raw materials should be one possible strategy on waste reuses. However, bottom ash contains trace amount of interferences such as heavy metal, sulfate, and chloride. When cement raw material is replaced by MSWIBA, some of the interference might produce adverse effects on cement bu
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