Relevant bibliographies by topics / Silica fume / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Silica fume.

Dissertations / Theses on the topic 'Silica fume'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Silica fume.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Brew, Daniel Robert Mitchell. "Impact of silica fume on cement performance." Thesis, University of Aberdeen, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369734.

Full text
Abstract:
Organic ion exchanger resin beads are widely used in nuclear waste technology for pond water cleanup. They accumulate radioactive Cs and Sr in service. For disposal, the beads are encapsulated in cement but their stabilisation in cement has been difficult to achieve. The ion exchangers uptake calcium and inbibe water, as a result of which they swell, cracking the cement. Nuclear Electric had previously commissioned work on non-swelling formulations. These consist of mixtures of sulfate-resisting Portland cement, calcium hydroxide and silica fume. However, concerns have been expressed about cem
APA, Harvard, Vancouver, ISO, and other styles
2

Al-Eesa, Azmi Sami Said. "Silica fume concrete in hot and temperate environments." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/6829.

Full text
Abstract:
his investigation deals with the influence of hot and temperate curing environments on the hardened properties of concrete and mortar mixes. Condensed silica fume was blended with OPC as a potential alternative cementitious material to plain OPC for use in the hot Iraqi climate, in an attempt to find a cement combination that would overcome some of the durability problems experienced when using a plain OPC concrete in such an environment. Throughout the investigation two curing environments were used: the first simulating the UK temperate climate and the second simulating the hot Iraqi climate
APA, Harvard, Vancouver, ISO, and other styles
3

Pun, Pierre Che Ho. "Influence of silica fume on chloride resistance of concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq28837.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kashi, Mohsen Gholam-Reza. "Freeze-thaw durability of high strength silica fume concrete." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/53942.

Full text
Abstract:
Specimens from 27 batches of concrete with water to cementitious (cement plus silica fume) ratio of 0.25 to 0.32, with and without entrained air, were tested for freeze-thaw durability in accordance with ASTM C666, procedure A (freezing and thawing in water). In addition, another set of similar specimens were moist cured for 28 days instead of 14 days and tested in accordance with ASTM C666 , Procedure A to determine the effect of curing time on the freeze-thaw durability of high strength concrete. Results show that non air-entrained high strength concrete with water cementitious ratio of less
APA, Harvard, Vancouver, ISO, and other styles
5

Shehata, Medhat H. "The effects of fly ash and silica fume on alkali-silica reaction in concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58597.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

El-Khatib, Jamal M. "Durability related properties of PFA, slag and silica fume concrete." Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315418.

Full text
Abstract:
Concrete has the largest production of all man-made materials. Compared with other construction materials, it possesses many advantages including low cost, general availability of raw materials, low energy requirement and utilization under different environmental conditions. Therefore, concrete will continue to be the dominant construction material in the foreseeable future. However, durability of concrete and reinfored concrete structures are still of worldwide concern, so producing a good quality concrete which impedes the ingress of harmful substances into it is of paramount importance. Cem
APA, Harvard, Vancouver, ISO, and other styles
7

Tank, Suresh Bhagwanji. "The use of condensed silica fume in Portland cement grouts." Thesis, University College London (University of London), 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307794.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Claisse, Peter Arnold. "The properties and performance of high strength silica fume concrete." Thesis, University of Leeds, 1988. http://etheses.whiterose.ac.uk/3256/.

Full text
Abstract:
Silicafume (SF) has been used as a partial replacement for cement in concrete and experiments have been carried out to measure the durability of the mixes. The SF mixes were made with 20% SF replacement of cement and waterlcement (wlc) ratios of 0.3 and 0.46. Three different curing conditions were used to simulate different site conditions and tests were carried out at 3,28 and 90 days after casting. The following properties were measuredfor the two SF mixes and the two control (OPC) mixes for each of the ages and curing conditions: corrosion rate of embedded steel by linear polarisation, elec
APA, Harvard, Vancouver, ISO, and other styles
9

Gans, Ira. "The production of ultrafine silica particles through a transferred arc plasma process /." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65464.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Boddy, Andrea M. "The effect of product form and silica content of silica fume on its ability to control alkali-silica reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0028/MQ50329.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Pristavita, Ramona. "Transferred arc production of fumed silica : rheological properties." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99787.

Full text
Abstract:
The thermal plasma production of fumed silica in a transferred arc consists of the decomposition of quartz to SiO (g) and oxygen followed by an oxidizing quench back to SiO2. The particles formed have diameters of the order of 10 to 20 nm and are linked in a three dimensional branched chain aggregate. Previous work by Addona and Munz (1999) demonstrated the technical feasibility of producing fumed silica using this method, but was unable to demonstrate the special rheological properties of the powder. The most important characteristic of fumed silica is the presence of hydroxyls on the surface
APA, Harvard, Vancouver, ISO, and other styles
12

Bajja, Zineb. "Influence de la microstructure sur le transport diffusif des pâtes, mortiers et bétons à base de CEM I avec ajout de fumée de silice." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN054/document.

Full text
Abstract:
Au regard de son importante résistance mécanique mais surtout de ses capacités de confinement potentielles conférées par une microstructure compacte, le béton s’avère le matériau le plus adapté pour composer la barrière ouvragée de la structure de stockage et l’enrobage de certains déchets radioactifs. La connaissance des propriétés de diffusion et de microstructure de ces matériaux cimentaires sont donc des éléments indispensables à l’étude de leurs durabilités à long terme. Dans un contexte plus particulier de confinement des déchets de faible à moyenne activité, l'utilisation des formulatio
APA, Harvard, Vancouver, ISO, and other styles
13

Konduru, Sathish Kumar Raju. "Performance evaluations of latex-modified and silica fume modified concrete overlays for bridge decks." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10559.

Full text
Abstract:
Thesis (M.S.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains xv, 235 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 212-216).
APA, Harvard, Vancouver, ISO, and other styles
14

Nacer, Samir. "Optimization of silica fume content and water to enhance performance of concrete /." Available to subscribers only, 2005. http://proquest.umi.com/pqdweb?did=1079666031&sid=7&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Asili, Mostafa. "The fracture toughness of silica fume concrete using experimental and numerical techniques." Thesis, University of South Wales, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265719.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

DESHINI, AMARENDRANATH. "FINENESS OF DENSIFIED MICROSILICA AND DISPERSION IN CONCRETE MIXES." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1186774530.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Katzer, Jacek. "Special waste fine aggregate concrete modified by silica fume and dispersed reinforcement : doctoral dissertation." Rozprawa doktorska, [s.n.], 1999. http://dlibra.tu.koszalin.pl/Content/1220.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Li, Jieren. "The combined effect of silica fume and fly ash on microstructure and properties of high-strength concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0035/NQ38485.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Alam, Sameer Alam. "Plastic and Slag as a Potential Aggregate Replacement in Concrete with Glass Fibers and Silica Fume Admixtures." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1544787269399169.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Alshammari, Talal. "A STUDY ON BEHAVIOR OF NATURAL AND RECYCLED AGGREGATE CONCRETES PREPARED WITH META-KAOLIN AND SILICA FUME." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2272.

Full text
Abstract:
Construction and demolition waste concrete has dramatically increased worldwide in the last decade. The social and environmental concerns on recycling of these wastes have consequently increased substantially. Recent technology has greatly improved the recycling process for construction and demolition waste concrete. The current study presents the results of a laboratory study on the performance of portland cement concrete prepared by incorporating different mineral admixtures i.e., silica fume (SF) and meta-kaolin (MK) with natural coarse aggregate (NCA) from quarry and recycled coarse aggreg
APA, Harvard, Vancouver, ISO, and other styles
21

Justice, Joy Melissa. "Evaluation of Metakaolins for Use as Supplementary Cementitious Materials." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6936.

Full text
Abstract:
Two metakaolins were evaluated for use as supplementary cementitious materials in cement-based systems. The metakaolins varied in their surface area (11.1 v. 25.4 m2/g), but were quite similar in mineralogical composition. Performance of metakaolin mixtures was compared to control mixtures and to mixtures incorporating silica fume as partial replacement for cement at water-to-cementitious materials ratios of 0.40, 0.50, and 0.60. In this study, the early age properties of fresh concrete and the mechanical and durability properties of hardened concrete were examined. Early age evaluations a
APA, Harvard, Vancouver, ISO, and other styles
22

Stundebeck, Curtis J. "Durability of ternary blended cements in bridge applications." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5082.

Full text
Abstract:
Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on November 6, 2007) Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
23

Yılmaz, Altan Karaşahin Mustafa. "Ferrokrom ve silikoferrokrom cürufları ile silis dumanının yol üstyapısında kullanımının incelenmesi /." Isparta : SDÜ Fen Bilimleri Enstitüsü, 2008. http://tez.sdu.edu.tr/Tezler/TF01152.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Hrout, Ghassan. "Investigate the Effect of Nano SIO2 on Porosity, Compressive and Flexural Strengths of Concrete Has 2% Fly Ash and 2% Silica Fume." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1608296326325322.

Full text
APA, Harvard, Vancouver, ISO, and other styles
25

Al-Ghamdi, Hamed A. "Effect of curing and mix design parameters on durability of Portland cement and Portland cement-silica fume mortars in a hot-marine environment." Thesis, University of Aberdeen, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301075.

Full text
Abstract:
This study was conducted to evaluate the effect of curing and mix design parameters, such as cement content and water to cementitious materials ratio, on the strength and durability characteristics of plain and silica fume cements exposed to a hot-marine environment. Specifically, the effect of curing and mix design parameters on chloride diffusion, shrinkage and carbonation of cement mortar specimens exposed to a hot-marine environment was evaluated. The results indicated that high water to cement ratio significantly influenced the durability performance of concrete through: (1) accelerating
APA, Harvard, Vancouver, ISO, and other styles
26

De, Milito Jose Antonio. "Avaliação do desempenho de aglomerante a base de gesso com cimento portland de alto forno e silica ativa." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258270.

Full text
Abstract:
Orientador: Gladis Camarini<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-09T18:12:28Z (GMT). No. of bitstreams: 1 DeMilito_JoseAntonio_D.pdf: 60807018 bytes, checksum: d77cec46bea9822138fd4024fad50842 (MD5) Previous issue date: 2007<br>Resumo<br>Resumo: O gesso é um aglomerante que tem sido muito empregado em revestimento de paredes. Apresenta um bom desempenho, é econômico e de fácil aplicação, mas limitado ao uso interno devido a sua sensibilidade à água. Algumas tentativas têm sido re
APA, Harvard, Vancouver, ISO, and other styles
27

Gao, Xiang, and S3090502@student rmit edu au. "Mix Design and Impact Response of Fibre Reinforced and Plain Reactive Powder Concrete." RMIT University. Civil, Environmental and Chemical Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080424.150722.

Full text
Abstract:
Concrete is the most broadly used material in construction worldwide and Reactive Powder Concrete (RPC, a type of ultra high performance concrete) is a relatively new member of the concrete family. In this work the critical parameters of RPC mix design are investigated and the mix design is explored through a program of concrete casting and testing. Owing to the enhanced microstructure of RPC, porosity and permeability can be significantly decreased in the concrete matrix. This benefits the durability characteristics of RPC elements resulting in a longer service life with less maintenance
APA, Harvard, Vancouver, ISO, and other styles
28

Grande, Fernando Mazzeo. "Fabricação de tijolos modulares de solo-cimento por prensagem manual com e sem adição de sílica ativa." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18141/tde-07072003-160408/.

Full text
Abstract:
Neste trabalho, por meio de uma metodologia experimental foram analisados vários aspectos de tijolos modulares compostos por misturas binárias e ternárias de solo-cimento e solo cimento-sílica produzidos em prensa manual modelo SAHARA, com a finalidade de se obter parâmetros e diretrizes que visam um melhor desempenho do material. Realizaram-se ensaios em corpos-de-prova cilíndricos de maneira acessória no decorrer do trabalho, o que resultou no suporte para fundamentação de diversas avaliações sobre as composições de traços utilizados na fabricação dos tijolos. Foram executados painéis de par
APA, Harvard, Vancouver, ISO, and other styles
29

Possan, Edna. "Contribuição ao estudo da carbonatação do concreto com adição de sílica ativa em ambiente natural e acelerado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2004. http://hdl.handle.net/10183/8524.

Full text
Abstract:
Devido à preocupação com a durabilidade das estruturas de concreto armado surgiram novas linhas de pesquisa destacando-se, dentre elas, a previsão de vida útil. Estes estudos deram origem a diversos modelos que tentam estabelecer o comportamento do concreto quando exposto a ambientes agressivos durante um determinado período. Existem várias maneiras de se modelar este comportamento: com base em resultados obtidos em experiências anteriores; a partir de ensaios de degradação acelerados; por métodos determinísticos e probabilísticos ou estocásticos. A estimativa de vida útil das estruturas de co
APA, Harvard, Vancouver, ISO, and other styles
30

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.

Full text
Abstract:
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
APA, Harvard, Vancouver, ISO, and other styles
31

Almeida, Alessandra Etuko Feuzicana de Souza. "Estudo da influência das adições de sílica ativa e copolímero estireno acrílico nas propriedades de argamassas para assentamento de porcelanato." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-15122010-095113/.

Full text
Abstract:
Apesar de suas excelentes características técnicas e estéticas, a aplicação de porcelanato em fachadas requer especial atenção devido ser um material diferente das cerâmicas convencionais, além de que as fachadas estão sujeitas a diversos agentes capazes de danificar os revestimentos cerâmicos. O baixo índice de absorção de água do porcelanato é a principal causa da perda ou falta de aderência entre o tardoz e a argamassa colante, pois não permite o mecanismo de aderência mecânica existente nas cerâmicas porosas. O presente trabalho visa o estudo de argamassas com adições de látex base estiren
APA, Harvard, Vancouver, ISO, and other styles
32

Fagury, Samir Costa. "Concretos e pastas de elevado desempenho: contribuição aos estudos de reparos estruturais e ligações entre concretos novo e velho, com tratamento da zona de interface." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-17012011-092136/.

Full text
Abstract:
A ligação entre concretos com cimento Portland de diferentes idades, composições e resistências é um dos problemas da tecnologia dos concretos estruturais. A continuidade desta ligação é prejudicada por uma diversidade de fatores que implicam desde a retomada de uma concretagem (junta fria) até a recuperação de estruturas de concreto deterioradas. Sob esse ponto de vista apresenta&#8722;se neste trabalho uma análise do comportamento de um sistema de reparos aplicados à recuperação de estruturas, ligações concretos velhos x concretos novos (caso das ampliações) e continuidades de concretagens.
APA, Harvard, Vancouver, ISO, and other styles
33

Oda, George Akira. "Estudo da atividade pozolânica da sílica da casca de arroz em matrizes de cimento Portland." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-11072017-154356/.

Full text
Abstract:
O uso de adições minerais no concreto como substituição parcial ao cimento Portland ajuda a preservar os recursos naturais poupando a matéria-prima, reduzindo o consumo de energia necessária para a produção do cimento e reciclando rejeitos que se lançados no meio ambiente causariam problemas ambientais e de saúde pública. A adição mineral que vem tendo muito destaque devido à sua alta reatividade, considerada por vários pesquisadores como uma superpozolana, é a sílica ativa (SA), um subproduto da fabricação de silício metálico ou ligas de ferro-silício. A sílica ativa se caracteriza por uma el
APA, Harvard, Vancouver, ISO, and other styles
34

Vanderlei, Romel Dias. "Análise experimental do concreto de pós reativos: dosagem e propriedades mecânicas." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-23082006-095043/.

Full text
Abstract:
A tecnologia dos materiais a base de cimento Portland vem se desenvolvendo rapidamente, onde a melhoria das propriedades mecânicas vem sendo alcançada, eliminando os agregados graúdos e estudando a composição granulométrica da mistura, procurando preencher os vazios utilizando materiais finos e ultrafinos, como pó de quartzo e a sílica ativa. Esta pesquisa tem como objetivos: desenvolver concreto de pós reativos com resistência à compressão próxima de 200 MPa e módulo de elasticidade acima de 45 GPa; propor uma relação constitutiva para o material, considerando o volume de fibras; especificar
APA, Harvard, Vancouver, ISO, and other styles
35

Almeida, Marina Augusta Malagoni de. "Contribuição ao estudo da durabilidade e do transporte de fluidos em concretos contendo adições minerais." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/7271.

Full text
Abstract:
Submitted by Erika Demachki (erikademachki@gmail.com) on 2017-05-04T19:01:17Z No. of bitstreams: 2 Dissertação - Marina Augusta Malagoni de Almeida - 2016.pdf: 12520522 bytes, checksum: 853486dc2fbdd4513ff1c2cf33d112b0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-05-05T12:57:03Z (GMT) No. of bitstreams: 2 Dissertação - Marina Augusta Malagoni de Almeida - 2016.pdf: 12520522 bytes, checksum: 853486dc2fbdd4513ff1c2cf33d112b0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e98
APA, Harvard, Vancouver, ISO, and other styles
36

Silva, Fernanda Giannotti da. ""Estudo de concretos de alto desempenho frente à ação de cloretos"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-26072006-135429/.

Full text
Abstract:
Atualmente, um dos principais problemas ligados às estruturas de concreto armado é a corrosão da armadura, especialmente devido à ação dos íons cloreto. Sua incidência no contexto das principais manifestações patológicas encontradas nas construções é bastante significativa, chegando a atingir índices de 50% em algumas regiões brasileiras. Além disso, o custo do reparo ou da reabilitação das estruturas deterioradas, em alguns casos, pode ser superior ao de uma estrutura nova. Com o objetivo de aumentar a vida útil das estruturas de concreto e diminuir o índice de ocorrência da corrosão de armad
APA, Harvard, Vancouver, ISO, and other styles
37

Prokopec, Zdeněk. "Mechanické aktivace příměsí do betonů a ověření dopadů na fyzikálně-mechanické vlastnosti čerstvých a zatvrdlých betonů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225684.

Full text
Abstract:
This work is devoted to describe the possibilities of mechanical activations of admixtures used in concrete. Then, the verification options of grind fly ash, both from brown and black coal, from the classical as well as fluidized combustion and examination their impact on physical and mechanical properties of concrete, especially on long-term development to old age 180 days. Further attention is paid to assessing the impact of the use of mechanically activated fly ash on hydration heat evolution and the associated volume changes in the age of 1 to 90 days. In this work are presented the result
APA, Harvard, Vancouver, ISO, and other styles
38

Almeida, David Costa de. "Desempenho de argamassas com sílica ativa em ambiente marinho." Universidade Federal de Alagoas, 2007. http://repositorio.ufal.br/handle/riufal/387.

Full text
Abstract:
The repair of reinforced concrete structures attracts more and more attention of researchers and constructors who see an ever growing number of pathologic phenomenons on several constructions that make use of this widely accepted material. The wrong notion which claims the concrete is an eternal and unchangeable matter has been definitively substituted by the fact that it s a dynamic and complex substance, vulnerable to several aggressive compounds which modify and cause damage to its chemical and physical structure. The present work intended to gather data about the performance of silica fume
APA, Harvard, Vancouver, ISO, and other styles
39

Pédèches, Jean-Michel. "Etude des proprietes mecaniques et du retrait de betons de haute performance." Toulouse 3, 1988. http://www.theses.fr/1988TOU30061.

Full text
Abstract:
Etude des betons avec resistance a la rupture en compression simple entre 30 et 130 mpa a 28 jours, realises par introduction de fumee de silice condensee et de fluidifiant. Dosage optimal de la fumee de silice (autour de 10% du poids du liant); variation des proprietes mecaniques, plus forte pour la resistance a la compression, avec fragilisation. Influence du fluidifiant sur la faible resistance a la compression aux jeunes ages et sur le retrait (moindre retrait avec la fumee de silice qu'avec les betons classiques d'egale resistance, fortement doses en ciment et/ou fluidifiant)
APA, Harvard, Vancouver, ISO, and other styles
40

Silva, Monique Pafiadache da. "RETRAÇÃO TOTAL E PENETRAÇÃO DE CLORETOS DE CONCRETOS COMPOSTOS COM CINZA DE CCA DE DIFERENTES TEORES DE CARBONO GRAFÍTICO." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/7791.

Full text
Abstract:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The use of agro-industrial by-products with pozzolanic properties has become an alternative in the cement industry because of the increasing consumption of cement, aiming at the rational use and sustainability of the mines that produce raw materials for the production of clinker and longer life of concrete structures. This research investigates the influence of the curing period and of the use of rice husk ash with different contents of graphitic carbon on the compressive strength, total shrinkage and chloride penetration of concre
APA, Harvard, Vancouver, ISO, and other styles
41

Martins, Alex Mizael. "Transporte de cloretos em concretos com adições minerais e o desempenho em relação à corrosão das armaduras." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/7887.

Full text
Abstract:
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-18T11:59:04Z No. of bitstreams: 2 Dissertação - Alex Mizael Martins - 2016.pdf: 6652239 bytes, checksum: 06fc65f07d3460875f7ecd163b128a49 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-10-18T12:00:09Z (GMT) No. of bitstreams: 2 Dissertação - Alex Mizael Martins - 2016.pdf: 6652239 bytes, checksum: 06fc65f07d3460875f7ecd163b128a49 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made availab
APA, Harvard, Vancouver, ISO, and other styles
42

Munhoz, Flávio André da Cunha. "Efeito de adições ativas na mitigação das reações álcali-sílica e álcali-silicato." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-10012008-100734/.

Full text
Abstract:
A reação álcali-agregado é uma manifestação patológica diretamente ligada à seleção dos materiais (cimento, agregados miúdo e graúdo, água e aditivos) que pode comprometer a durabilidade das estruturas de concreto, uma vez que a interação desses materiais e as condições ambientais é que vão conferir ao concreto determinadas propriedades ligadas à sua vida útil. A reação entre os hidróxidos alcalinos solubilizados na fase líquida dos poros dos concretos e alguns agregados reativos é lenta e resulta em um gel que, ao se acumular em vazios do concreto e na interface pasta-agregado, na presença de
APA, Harvard, Vancouver, ISO, and other styles
43

Waller, Vincent. "Relations entre composition des bétons, exothermie en cours de prise et résistance Fen compression." Marne-la-vallée, ENPC, 1999. http://www.theses.fr/1999ENPC9909.

Full text
Abstract:
La maitrise des risques de fissuration d’origine thermique dans les structures en béton passe par la connaissance de l’exothermie qui accompagne l’hydratation des liants, en particulier dans le cas de liants mixtes contenant du ciment et des pouzzolanes (fumée de silice ou cendre volante silico-alumineuse). Les travaux présentés ici ont consisté à modéliser cette exothermie en fonction de la composition du béton, après une étude bibliographique sur le sujet et la réalisation d’une campagne expérimentale, comportant entre autres de nombreux essais calorimétriques, complétant les résultats trouv
APA, Harvard, Vancouver, ISO, and other styles
44

Haniche, Rachid. "Contribution à l’étude des bétons portés en température / Evolution des propriétés de transfert : Etude de l’éclatement." Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0155/document.

Full text
Abstract:
L’étude du comportement des bétons à hautes températures est d’une grande importance pour déterminer la stabilité et la résistance des structures en béton en situation d’incendie. Des incendies spectaculaires, ces dernières années, ont montré que le béton pouvait être très fortement sollicité. Ainsi il apparaît qu’assurer un très bon comportement du béton en température permet de sauver des vies et de diminuer les frais d'immobilisation et de réparation des structures endommagées. Le travail présenté vise, par une étude expérimentale, à apporter une meilleure compréhension des phénomènes mis e
APA, Harvard, Vancouver, ISO, and other styles
45

Janča, Martin. "Zlepšení dispergace křemičitého úletu ve vysokohodnotných betonech." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-295699.

Full text
Abstract:
The goal of this work was to create a method for improving the dispersion of silica fumes for use in high performance concrete. Traditional methods used to design and manufacture high performance concrete emphasize the removal of coarse aggregates. Use of specially sorted fine aggregates at relatively low doses, the use of super-plasticizers and siliceous excrement. The low water content was achieved by using superplasticizer on a polycarboxylate basis. The standard ultrasound technology found in each laboratory was selected for the dispersion of silica fume. For experiments were we used dry s
APA, Harvard, Vancouver, ISO, and other styles
46

Bach, Thi thuy ha. "Evolution physico-chimique des liants bas PH hydratés : influence de la température et mécanisme de rétention des alcalins." Thesis, Dijon, 2010. http://www.theses.fr/2010DIJOS085/document.

Full text
Abstract:
Dans un site de stockage profond de déchets radioactifs, l’utilisation de matériaux à base de ciment Portland en association avec de l’argile pourrait se révéler inadaptée en raison de leur forte alcalinité. Une alternative serait de mettre en œuvre des ciments générant des solutions interstitielles de pH réduit (de l’ordre de 11 au lieu de 13,5 pour un CEM I). Les formulations étudiées dans cette thèse font appel à des ciments composés (également appelés « liant bas pH ») élaborés à partir de mélanges binaires (CEM I / fumée de silice) ou ternaires (CEM I / fumée de silice / cendres volantes
APA, Harvard, Vancouver, ISO, and other styles
47

Moraes, Mayara Queiroz. "Contribuição aos estudos da influência da nanossílica nas propriedades mecânicas e na trabalhabilidade de concretos para produção em centrais e para fabricação de pré-moldados." Universidade Federal de Goiás, 2012. http://repositorio.bc.ufg.br/tede/handle/tede/3429.

Full text
Abstract:
Submitted by Erika Demachki (erikademachki@gmail.com) on 2014-10-21T20:50:08Z No. of bitstreams: 2 Dissertação - Mayara Queiroz Moraes - 2012.pdf: 2306074 bytes, checksum: 39f99dfabbb79296b809313dd0730f16 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Jaqueline Silva (jtas29@gmail.com) on 2014-10-22T19:07:28Z (GMT) No. of bitstreams: 2 Dissertação - Mayara Queiroz Moraes - 2012.pdf: 2306074 bytes, checksum: 39f99dfabbb79296b809313dd0730f16 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>
APA, Harvard, Vancouver, ISO, and other styles
48

Bardella, Paulo Sergio. "Avaliação das propriedades fisicas e mecanicas de concretos produzidos com os cimentos Portland de alta resistencia inicial e de alto-forno aditivados com silica ativa curados termicamente." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257816.

Full text
Abstract:
Orientador: Gladis Camarini<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-05T12:07:39Z (GMT). No. of bitstreams: 1 Bardella_PauloSergio_M.pdf: 1317917 bytes, checksum: 2bd53842fd42fd70b176488c91fedd8f (MD5) Previous issue date: 2005<br>Resumo: A durabilidade das estruturas de concreto depende da estrutura porosa e da impermeabilidade do concreto, uma vez que a entrada de água e de agentes deletérios iniciam os processos patológicos que diminuem a vida útil de uma estrutura de concre
APA, Harvard, Vancouver, ISO, and other styles
49

Moustachi, Om Elkhaïat. "Influence de la microstructure des mortiers de ciment portland armes de fibres sur leur comportement mecanique en flexion." Toulouse, INSA, 1986. http://www.theses.fr/1986ISAT0002.

Full text
Abstract:
Analyse des modifications de la structure interne du mortier induites par l'introduction des fibres et determination de leur influence sur les proprietes mecaniques du mortier en flexion. Des fiches en paquets introduites dans le mortier se dispersent lors du malaxage en fibres individuelles espacees de quelques microns. Ces espaces, tres peu accessibles aux particules anhydres du ciment sont partiellement remplis par des hydrates. Ils rendent le mortier tres permeable aux fluides et influent directement sur son module d'elasticite en flexion qui diminue avec le pourcentage de fibres. L'effet
APA, Harvard, Vancouver, ISO, and other styles
50

Kodešová, Monika. "Vliv aktivních příměsí a jejich dávkování na CHRL ve stáří 28 a 90 dnů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265291.

Full text
Abstract:
Subject of this work is to design a batch of concrete with additives, which are to replace the cement of various doses so as to not adversely affect the properties of fresh and hardened concrete and simultaneously withstand the environment XF.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Silica fume' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography