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Dissertations / Theses on the topic 'Pozzolanic materials'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Bordeian, Georgeta Simona. "Characterisation and properties of alkali activated pozzolanic materials." Thesis, Sheffield Hallam University, 2000. http://shura.shu.ac.uk/19371/.

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Many of the waste materials produced from modem heavy industries are pozzalans, which develop cementitious properties when finely divided in the presence of free lime. This property allows a potential industrial use for this waste as a cement replacement material in concrete. An example of such a waste material is blast furnace slag from the smelting of iron and steel. The US produces 26 million tons of blast furnace slag annually. Most of the slag is slowly cooled in air and it makes a poor pozzolan. Only 1.6 million tons of the slag is available in the granulated form, which is suitable as a

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2

Chapagain, Indra Prasad. "Mechanical properties of self-consolidating concrete with pozzolanic materials." FIU Digital Commons, 2008. http://digitalcommons.fiu.edu/etd/2111.

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Self-consolidating concrete has been described as the most revolutionary development in concrete technology in several decades with the ability to flow freely through closely spaced reinforcements, expel entrapped air and self compact without vibration. Since it was first developed in Japan in the early 1980's, major development in the chemical admixture technology has made SCC more viable. An experimental study was conducted to identify the mechanical properties of SCC by optimizing the use of pozzolanic materials and local aggregates with some proposed statistical models. The research was fo

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3

Meral, Cagla. "Using Perlite As A Pozzolanic Addition In Blended Cement Production." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/3/12605259/index.pdf.

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Perlite is a volcanic glass which has high amount of silica and alumina. Those properties make it a candidate, if finely ground, for being used as a pozzolan. The studies on the pozzolanic properties of perlite are very limited, and none of them has dealt with the use of perlite in the blended cement production. The aim of this study is to investigate the pozzolanic properties of perlite, and if appropriate to investigate perlite&rsquo<br>s usability in blended cement production. For this purpose, perlites from two different sources &ndash<br>Izmir and Erzincan - are used as replacement of

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Kalakada, Zameer. "Experimental Investigation on Recycled Glass Powder as a Pozzolanic Cement." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/393612.

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Cement is the main ingredient in concrete, and the production of cement is a costly and energy absorbing process. In addition, production of cement ominously contributes to environmental pollution, as 1 ton of cement releases about 0.9 ton of CO2 in the atmosphere. Since cement is the material which is primarily responsible for the cost and the pollution, there is a critical need to develop materials which exhibit cementitious property and could be used as a substitute of cement. Supplementary Cementitious Materials (SCM), are substances which possess cementitious properties, hence they can be

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5

Ahmed, Mohammad Sharfuddin Aerospace Civil &amp Mechanical Engineering Australian Defence Force Academy UNSW. "Effects of systematic increase in pozzolanic materials on the mechanical, durability, and microstructural characteristics of concrete." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Aerospace, Civil and Mechanical Engineering, 2007. http://handle.unsw.edu.au/1959.4/38645.

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The use of high performance concrete in construction has been enhanced by the use of pozzolanic materials. However, the use of these materials has not been optimized. Such optimization may be achieved by a systematic increase in the amount and combination of pozzolanic material additions, with accompanying studies of their effects on the mechanical, durability and microstructural characteristics of blended concrete. This work evaluated various concrete durability issues by studying systematic increases of pozzolanic materials such as fly ash and blast furnace slag (BFS) in the range of 25, 50

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6

Erdem, Tahir Kemal. "Investigation On The Pozzolanic Property Of Perlite For Use In Producing Blended Cements." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12605964/index.pdf.

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Perlite is a glassy volcanic rock that contains approximately 70-75% silica and 12-18% alumina. There are very large perlite reserves in the world (~6700 million tons) and approximately two thirds of these is in Turkey. Due to its high amounts of silica and alumina, at the beginning of such a study, it seemed that it would be worth first to find out whether perlite possesses sufficient pozzolanic property when it is a finely divided form and then to investigate whether it could be used as a pozzolanic addition in producing blended cements. In this study, perlites from two different regions

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7

Uzal, Burak. "Properties And Hydration Of Cementitious Systems Containing Low, Moderate And High Amounts Of Natural Zeolites." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608974/index.pdf.

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The extent of the benefits provided by use of SCMs in cementitious systems increases as their percentage amounts in total binder increases. However, the proportion of SCMs in cementitious systems is limited, especially for natural pozzolans, by some factors such as increase in water requirement and decrease in rate of strength development. Therefore investigations are needed to increase the amount of natural pozzolans in blended cements or in concrete as much as possible without decreasing their performance. This aim requires studies on cementitious systems with more reactive natural pozzolans

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8

Morel, Bayram Murat. "Investigation Of The Effects Of Temperature On Physical And Mechanical Properties Of Monolithic Refractory Made With Pozzolanic Materials." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606700/index.pdf.

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In recent years, scientific studies are carried out to find new refractory material. Having good mechanical properties under very high temperatures, refractories are widely used in industries like iron, steel, glass, cement and pottery. Researches are focused on monolithic refractory making because of their superior properties comparing to conventional firebrick refractories. Providing a mono-block body, having no joints makes the monolithic refractories more durable at elevated temperatures. Easier production and installation are two main points that people are choosing monolithic refractorie

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9

Fagundes, Luiza Perroni. "Utilização de resíduo de cerâmica proveniente de olarias para estabilização de solo laterítico /." Ilha Solteira, 2019. http://hdl.handle.net/11449/181162.

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Orientador: Mauro Mitsuuchi Tashima<br>Resumo: O modo como são dispostos os resíduos gerados pela indústria, pela agropecuária e pela sociedade gera uma preocupação crescente. Muitas pesquisas têm sido desenvolvidas com a finalidade de diminuir o impacto que estes causam a sociedade e ao meio ambiente. Diversos resíduos têm sido estudados como materiais cimentícios suplementares para substituição de parte da quantidade de cimento, contribuindo para a redução de áreas de aterro e também na diminuição da emissão de CO2 associada à produção de cimento Portland, que é responsável por cerca de 5% a

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10

Tekin, Ahmet Veli. "Effect Of Coating Materials And Mixture Constituents On The Permeability Of Concrete." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614214/index.pdf.

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The improvement in the impermeability of concrete was studied using different methods. The main aim was to investigate impermeability improvement of concrete and to compare these methods. Two different methods were examined to investigate and compare impermeability and strength improvement of concrete by using two different sets of concrete specimens. These methods included the application of coating materials to concrete and the production of concrete using different constituent amounts and types. The first set of concrete specimens was prepared by applying two different coating materials (a

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11

Ataie, Feraidon Farahmand. "Enhancement of agricultural residue ash reactivity in concrete through the use of biofuel pretreatments." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/16187.

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Doctor of Philosophy<br>Department of Civil Engineering<br>Kyle A. Riding<br>The cement industry is an important component in the quest to reduce global greenhouse gas emissions because of vast amounts of cement used annually. Incorporating supplementary cementitious materials (SCMs) into concrete is one alternative to reduce cement production and thereby reduce greenhouse gas emissions. This study investigated three types of agricultural residues, namely corn stover, wheat straw, and rice straw, in addition to bioethanol byproducts as potential resources for SCM production for concrete applic

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12

Hansen, Débora Magali. "Avaliação das propriedades pozolânicas de um resíduo de cerâmica vermelha para emprego como material cimentício suplementar." Universidade do Vale do Rio dos Sinos, 2016. http://www.repositorio.jesuita.org.br/handle/UNISINOS/5397.

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Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2016-06-15T15:50:42Z No. of bitstreams: 1 DÉBORA MAGALI HANSEN_.pdf: 2330600 bytes, checksum: 74a7605994355dc5762f8c364bddf4c9 (MD5)<br>Made available in DSpace on 2016-06-15T15:50:42Z (GMT). No. of bitstreams: 1 DÉBORA MAGALI HANSEN_.pdf: 2330600 bytes, checksum: 74a7605994355dc5762f8c364bddf4c9 (MD5) Previous issue date: 2016-03-30<br>CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>PROSUP - Programa de Suporte à Pós-Gradução de Instituições de Ensino Particulares<br>A destinação final ambientalm

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Ratiarisoa, Rijaniaina. "Valorisation de résidus agroindustriels comme matériaux pour l'habitat et la construction : utilisation de la bagasse dans les liants composés minéraux et les composites." Thesis, Antilles, 2018. http://www.theses.fr/2018ANTI0265/document.

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La présente étude vise à valoriser des résidus agroindustriels comme matériaux pour l’habitat et la construction. Dans ce contexte, les travaux de recherche s’articulent autour de deux axes majeurs : le développement d’un liant alternatif et l’élaboration de matériaux composites à partir de ce liant alternatif et des matériaux végétaux. Deux liants composés utilisant des cendres de bagasse, nommés cendres de bagasse-chaux et ciment-cendres de bagasse ont été étudiés. A partir de ces liants composés, deux types de matériaux composites incluant des matériaux végétaux ont été élaborés : un compos

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Іващишин, Ганна Степанівна. "Низькоемісійні змішані цементи та модифіковані бетони і будівельні розчини на їх основі". Diss., Національний університет "Львівська політехніка", 2020. https://ena.lpnu.ua/handle/ntb/53805.

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Donatello, Shane. "Characteristics of incinerated sewage sludge ashes : Potential for pozzolanic material in construction products." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512054.

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Sio, Jeanette Dorol. "Influence of Pozzolanic Material in the Conversion and Corrosion Behaviour of Calcium Aluminate Cement." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/12694.

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Calcium aluminate cement (CAC) is used as a protective lining to combat attack by microorganisms and their metabolic products on reinforced concrete sewer pipes. CAC corrosion behaviour is related to the conversion process of the aluminate hydrates. Full conversion can result to a 5-8 times increase in corrosion rate. Hence, understanding and controlling the rate and the processes that affect conversion is important in the effective use of CAC as a mitigation strategy against the attack of microorganisms. This study was focussed on the role of the pozzolanic material, i.e. fly ash, in supp

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17

Claus, Julien. "Investigations on a new high-strength pozzolan foam material." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/31804.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Doyoyo Mulalo; Committee Member: Will Kenneth; Committee Member: Yavari Arash. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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18

Grist, Ellen. "The implementation of innovative and sustainable construction materials." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619149.

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This research uses a novel construction material (lime-pozzolan concrete) and real-world project (a school) as a vehicle for investigating the implementation or applied-innovation process in construction. The implementation of new technologies at a product-level is recognised to be an antecedent of technological change in the construction industry. A ‘real world’ construction project aiming to implement a novel lime-pozzolan concrete in the field, has been used as a process-tracing case study. Rigorous analysis of this case study project, expressly focusing on project-level communication, has

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Nita, Clovis. "Utilização de pozolanas em compósitos de cimento reforçados com fibras de celulose e PVA." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-24032006-111305/.

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Os compósitos reforçados com fibras naturais são uma opção frente a fibrocimentos com amianto, devido à grande disponibilidade de fibras naturais como as de coco, sisal além das fibras de celulose. Aspectos relacionados com a durabilidade precisam ser melhorados, podendo ser citado a diminuição da resistência das fibras quando em meio alcalino causando a perda de propriedades mecânicas dos compósitos. Uma alternativa a esse problema é o uso de pozolana que irá consumir o hidróxido de cálcio proveniente da hidratação do cimento Portland, resultando em fases hidratadas como o C-S-H e aluminatos

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20

Over, Derya. "Early Heat Evolution In Natural Pozzolan-incorporated Cement Hydration." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614533/index.pdf.

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Portland cement hydration is an exothermic process. The heat evolved during the hydration process is especially important in mass concrete, and hot and cold weather concreting. Heat of hydration is affected by several factors like chemical composition of cement, fineness of cement and ambient temperature. The major aim of this thesis is to investigate the effect of cement composition and fineness, amount and composition of the fine portion (&lt<br>45 &micro<br>m) of natural pozzolan-incorporated cement on hydration heat. For this purpose, a portland cement and pozzolan-incorporated blended ce

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Duru, Kevser. "Sulfate Resistance Of Blended Cements With Fly Ash And Natural Pozzolan." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607569/index.pdf.

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Numerous agents and mechanisms are known to affect the durability of a concrete structure during its service life. Examples include freezing and thawing, corrosion of reinforcing steel, alkali-aggregate reactions, sulfate attack, carbonation, and leaching by neutral or acidic ground waters. Among these, external sulfate attack was first identified in 1908, and led to the discovery of sulfate resistant Portland cement (SRPC). Besides SRPC, another way of coping with the problem of sulfate attack is the use of pozzolans either as an admixture to concrete or in the form of blended cements This

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22

Shearer, Christopher R. "The productive reuse of coal, biomass and co-fired fly ash." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52298.

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Stricter greenhouse gas emission limits and renewable energy requirements are expected to further increase the worldwide practices of firing biomass and co-firing biomass with coal, which are both considered more sustainable energy sources than coal-only combustion. Reuse options for the by-products of these processes -biomass ash and co-fired fly ash -remain limited. Therefore, this research examines their use as supplementary cementitious materials (SCMs) in concrete and as precursors for alkali-activated geopolymers. Toward their potential use as an SCM, after characterizing these ashes as

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

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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

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Fernandes, Ana Júlia Maciel Marinho. "Influência do teor de sílica e alumina no comportamento pozolânico de materiais cimentícios suplementares." Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7154.

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Submitted by JOSIANE SANTOS DE OLIVEIRA (josianeso) on 2018-08-08T16:43:38Z No. of bitstreams: 1 Ana Júlia Maciel Marinho Fernandes_.pdf: 24903248 bytes, checksum: e58f36fcc0799fa5830bd2beede0f0ac (MD5)<br>Made available in DSpace on 2018-08-08T16:43:38Z (GMT). No. of bitstreams: 1 Ana Júlia Maciel Marinho Fernandes_.pdf: 24903248 bytes, checksum: e58f36fcc0799fa5830bd2beede0f0ac (MD5) Previous issue date: 2018-05-28<br>Nenhuma<br>A utilização de materiais cimentícios suplementares (MCS) na produção de cimento é uma estratégia bastante difundida para diminuição de custos de produção, e p

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Aslan, Ozlem. "Predicting Long Term Strength Of Roller Compacted Concrete Containing Natural Pozzolan By Steam Curing." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607727/index.pdf.

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Roller Compacted Concrete (RCC) is new technology gaining popularity in the recent years due to its low cost, rapid construction, and using opportunity of by-products. RCC is widely used in the world. However, the use of RCC has been restricted to construction of few cofferdams, and limited to local use in dam construction up to date. In this thesis, two types of cement, two types of natural pozzolan, aggregates with varying gradations, and a type of water reducing chemical admixture were used. Prior to carrying out the tests, the chemical and physical properties of materials were determined.

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Bayer, Petr. "Použitelnost ložového popele z vitrifikovaného lignitového uhlí v kompozitních cementech." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217052.

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Předložená magisterská práce se zabývá možným použitím vitrifikovaného lignitového lóžového popele jako náhrada slinku v kompozitních cementech. Byly zkoumány vlivy přidaného vitrifikovaného lóžového popele, jeho jemnosti, alkalických roztoků a jejich koncentrací. Byly připraveny kompozitní cementy v souladu s normou DIN EN 197 – 1. V těchto cementech bylo nahrazeno 30 % slinku vitrifikovaným lóžovým popelem. Konkrétně byly připraveny kompozitní cementy s vitrifikovaným lóžovým popelem o jemnosti 5549 cm2/g a 8397 cm2/g. Dále byly přidány alkalické roztoky hydroxidů a síranů vždy o dvou různýc

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Chengula, Duwa Hamisi [Verfasser]. "Improving Cementitious Properties of Blended Pozzolan Based Materials for Construction of Low Cost Buildings in Mbeya Region, Tanzania / Duwa Hamisi Chengula." Kassel : Kassel University Press, 2018. http://d-nb.info/115379599X/34.

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Kieling, Amanda Gonçalves. "Influência da segregação no desempenho de cinzas de casca de arroz como pozolanas e material adsorvente." Universidade do Vale do Rio dos Sinos, 2009. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4445.

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Submitted by William Justo Figueiro (williamjf) on 2015-07-14T22:58:06Z No. of bitstreams: 1 02c.pdf: 4143631 bytes, checksum: f74eb64ed042d68302da8c134a634656 (MD5)<br>Made available in DSpace on 2015-07-14T22:58:06Z (GMT). No. of bitstreams: 1 02c.pdf: 4143631 bytes, checksum: f74eb64ed042d68302da8c134a634656 (MD5) Previous issue date: 2009<br>CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Com o objetivo de reduzir a geração de resíduos nos processos industriais e agrícolas, bem como melhor reaproveitá-los, seja no próprio processo produtivo ou como matéria-prim

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Moraes, Maria Júlia Bassan de. "Estudo do potencial da cinza de folha de bambu para sua utilização como material pozolânico e sustentável em matrizes cimentantes /." Ilha Solteira, 2019. http://hdl.handle.net/11449/180946.

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Orientador: Jorge Luís Akasaki<br>Resumo: O contexto mundial de preocupação em relação ao meio-ambiente, seu uso desenfreado e a emissão dos gases estufa, principalmente a emissão de dióxido de carbono destacou a importância da pesquisa para se buscar novas alternativas sustentáveis nos meios de produção, dentre eles se encaixa a indústria do cimento Portland. A proposta deste estudo é uma nova alternativa sustentável para a construção civil, estudando a cinza de folha de bambu (CFB) como material pozolânico para ser utilizado como substituição parcial do cimento Portland. A cinza de folha de

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Pereira, Adriana Maria. "Avaliação do uso da cinza do bagaço de cana-de-açúcar na produção de aglomerantes ativados alcalinamente /." Ilha Solteira, 2019. http://hdl.handle.net/11449/181173.

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Orientador: Jorge Luís Akasaki<br>Resumo: Nos últimos anos, tem havido um crescente interesse em substituir parcialmente ou totalmente o uso do cimento Portland por materiais com baixo impacto ambiental; logo o estudo de aglomerantes ativados alcalinamente obtidos a partir da mistura de um precursor sólido, rico em aluminossilicato, e uma solução alcalina de alta concentração, tem se mostrado uma alternativa viável, uma vez que o consumo de energia e a emissão de CO2 durante a produção dessas matrizes são reduzidas, e ainda, ocorre a possibilidade de inserção de subprodutos agroindustriais, na

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Nakanishi, Erika Yukari. "Cinza residual da queima de biomassa do capim elefante (Pennisetum purpureum) como material pozolânico substituto do cimento Portland." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/74/74131/tde-07102013-094322/.

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O objetivo do presente estudo foi contribuir para a viabilização do uso da cinza de capim elefante em escala laboratorial como uma pozolana ativa em substituição parcial do cimento Portland, através da obtenção e tratamento da cinza e seu estudo em pastas. O trabalho foi desenvolvido em três etapas. Na etapa 1, denominada \"Obtenção da cinza\", foi realizado o estudo das estruturas do capim elefante, que foi separado em folhas, (colmo + bainha) e planta inteira e para análise da cinza de cada parte. Observa-se na cinza que há um teor elevado principalmente, de sílica e potássio, sendo que o te

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Unsal, Saglik Asli. "Alkali-silica Rectivity And Activation Of Ground Perlite-containing Cementitious Mixtures." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12611249/index.pdf.

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Perlite is a volcanic mineral. The latest investigations on ground perlite showed that it is suitable for pozzolanic usage. Thus, it is of vital importance especially for countries rich in perlite such as Turkey. The aim of this study is to investigate the advantages and problems associated with using perlite in concrete and to identify accurate methods and amounts of use for producing durable cementitious mixtures. Within the scope of this study, the alkali-silica reactivity of perlite containing cementitious mixtures were compared using four different methods. Expansion mechanism of the mixt

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Rovnaníková, Markéta. "Studium a modelování karbonatace betonu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-233351.

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The corrosion of steel reinforcement is probably the most frequent type of degradation of reinforced concrete structures. Reinforcing bars are protected from corrosion by a thin iron oxide layer which is formed on their surface due to a high alkalinity of the surrounding concrete. Corrosion may start when this layer is destroyed (i) either by chloride ion penetration (when the concentration of dissolved chloride at the depth of the reinforcing steel exceeds a critical value) or (ii) by a reduction in the pH value of pore solution to values below 9.5. Such a reduction in alkalinity is the resul

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Frohard, Fabien. "Durabilité des éco-bétons : impact d'additions cimentaires alternatives sur la corrosion des armatures dans les bétons armés." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1170/document.

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L'utilisation de ressources locales est une des facettes importantes du développement durable dans le secteur de la construction. Plusieurs types de sous-produits sont aujourd'hui à l'étude pour une utilisation dans les bétons en tant qu'addition cimentaire, dans le but de développer des liants basés sur des ressources alternatives. La présente étude cherche à évaluer les performances de quatre types de sous-produits sur les propriétés des bétons armés vis-à-vis de la corrosion. La poudre de verre, les cendres volantes de papeterie, les cendres de boues d'épurations ou les sédiments calcinés p

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Fazzan, João Victor. "Avaliação da reatividade da cinza do bagaço de cana-deaçúcar em concretos por meio do fator k de eficácia cimentante /." Ilha Solteira, 2017. http://hdl.handle.net/11449/151394.

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Orientador: Jorge Luis Akasaki<br>Resumo: Com a vigente expansão dos canaviais brasileiros, um estudo direcionado para os resíduos provenientes da cana-de-açúcar torna-se imprescindível no cenário atual. Neste sentido, pesquisas estão sendo desenvolvidas para a utilização de cinza do bagaço da cana-de-açúcar (CBC) em compósitos cimentícios, sendo que esta cinza é obtida a partir da queima do bagaço que é utilizado como combustível em processos de cogeração de energia. A CBC é predominantemente constituída de dióxido de silício, e esta característica tem conduzido à avaliação da potencialidade

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Pyreňová, Eliška. "Studium vlastností polymery modifikovaných malt využívající pucolánově aktivní materiály." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240307.

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This diploma thesis is focused on the study of the properties of polymer-modified cementitious mortars which using pozzolanic active materials based on amorphous silica. Explores the possibilities of using the recycled glass as a partial replacement of cement in PMM. Properties of mortars are reviewed in mineralogical and technological point of view. For specification of the results were used the analysis RTG, DTA and REM.

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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.

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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

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Anjos, Marcos Alyssandro Soares dos. "Adi??o do res?duo de biomassa da cana-de-a??car em pastas para cimenta??o de po?os petrol?feros produtores de ?leos pesados." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/12742.

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Made available in DSpace on 2014-12-17T14:07:02Z (GMT). No. of bitstreams: 1 MarcosASA_capa_ate_cap5.pdf: 2919360 bytes, checksum: 8bb04eb85df77f75f3f1de37bbecc19d (MD5) Previous issue date: 2009-04-02<br>The Potiguar basin has large fields of viscous oil where the used method for recovering is based on vapor injection; this operation is carried out by injecting vapor in the oilwell directly, without the protection of a revetment through thermal insulation, what causes its dilation and, consequently, cracks in the cement placed on the annular, and lost of hydraulic insulation; this crack

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Guélin-Desfarges, Chantal. "Production de spores de penicillium roqueforti par fermentation en milieu solide sur substrats naturels et synthetiques." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF21101.

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Tu, Geng-Ye, and 塗耕業. "Hydration Characteristic of Cement Paste Blended with Pozzolanic Materials." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/34248824734755988221.

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碩士<br>國立中興大學<br>土木工程學系所<br>95<br>The purpose of this research is to investigate the effects of adding pozzolanic materials on the hydration characteristics of the cement paste. First, for the conditions of varied experimental parameters including water-to-binder ratios(w/b), pozzolanic material replacements and testing ages, the compressive strength tests, the ignited loss analysis, and the MIP porosity measurements were conducted on three series of pastes— ordinary Portland cement (OPC) paste, fly ash-cement (FC) paste and slag-cement (SC) Paste. Second, the effects of experimental variables

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Wu, A.-Man, and 吳阿滿. "Effect of Pozzolanic Materials on Impedance property of Cement Paste." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/62611132589037844390.

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碩士<br>東南科技大學<br>防災科技研究所<br>98<br>This paper is to study the engineering properties of cement paste with fly ash and slag addition, using AC impedance and Vicat needle penetration. The research including the setting time and the impedance behavior of cement paste incorporating with fly ash and slag is implemented. The results shows that the higher water-to-binder ratio, the higher initial and final setting time of paste; with the increase in fly ash and slag addition, the initial and final setting time of paste increases. At both fixed-frequency (100 Hz and 10 kHz), the impedance value of

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Chao, Yu-En, and 趙譽恩. "The Study on Water-Repellent Property of Concrete with Pozzolanic Materials." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/59449909992585204884.

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碩士<br>東南技術學院<br>防災科技研究所<br>96<br>The object of this research is mainly to study the influence of permeability properties of concrete on pozzolanic materials, and further investigate the relationship of Engineering and permeability properties of concrete. The experimental results show that the concrete with the lower water/cement ratio has a decrease in permeability coefficient. The water/cement ratio is found to be proportional to the compressive strength of concrete and inversely proportional to the Log (K). The w/c concrete of 0.68 has a permeability coefficient of 1.8×10-11cm/s. The change

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Chen, Shih-Cheng, and 陳世政. "Adsorption of Chloride Ions on Major Cement Phases and Pozzolanic Materials." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cn3ch8.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>106<br>This study explored the adsorption of the chloride ion on the major phases of the Portland cement and the pozzolanic materials. During the study, the major phases of the Portland cement, such as C3S、C2S、C3A、C4AF, and the hydrated phase of ettringite were prepared and immersed in the NaCl solution. Both the changes in the chloride ion concentration and the weight of the specimens were measured so the amount of the adsorption was calculated. Results showed that the adsorption was related to the rate of hydration. The phases that hydrate fast had high adsorption,

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Tsai, Yen-Kai, and 蔡焱凱. "Burgers Model to simulate the Damping Properties of Concrete adding Pozzolanic Materials." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3xxya7.

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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>102<br>Material damping ratio is a evaluate of material damping performance indicators, if the concrete structures have good self-damping properties of the impact load, wind and earthquakes have better soothing ability, using Burgers model to predict the mechanical damping properties of concrete pozzolan materials, pozzolanic materials furnace slag, fly ash and silica fume content of 0%, 10%, 20% and 30%, a total of 10 kinds of ratios, age 3 days, 7 days, 28 days and 56 days, the number of research participation have aggregate particle size, pozzolan, conten

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Su, Hen-Ching, and 蘇恆進. "The Study on Pozzolanic Materials for Control Hydration Temperature of Mass Concrete." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/92464567167813457151.

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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>101<br>The purpose of this research is about the variations of hydration heat in different proportioning between the pure cement concrete and the blended cement which mixed with slag and fly ash. Through those experiments that can be found out the effects of heat controlling by reducing large proportion of cement on mass concrete, and also can compare the intensities. It can be used the automatic thermometer to record the temperatures of iconic mockup of concrete. The mockups were made of 2 sets of pure cement concrete proportioning and one set of pozzolan

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CHIH-WEI, FANG, and 方志偉. "Effects of Pozzolanic Materials on the Pulse Velocity of High Performance Concrete." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/51386741354305792905.

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碩士<br>國立中興大學<br>土木工程學系<br>89<br>The objective of this paper is to experimentally investigate the effects of pozzolanic materials on the pulse velocity of high performence concrete . A mathematical model for the prediction of high performence concrete pulse velocity is also proposed. The specimens of concrete are prepared with various paste content and water-cement ratios.The influences of paste containing various pozzolanic materials on the concrete pulse velocity and compressive strength are analyzed. The result show that the paste properties on the can significantaly influence the

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Pin, Li, and 李斌. "Research of Engineering Properties on Cement Mortar withDesulfurization Slag and Pozzolanic Materials." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/66588922110455209079.

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碩士<br>正修科技大學<br>營建工程研究所<br>103<br>Desulfurization steelworks slag is solid waste arising from the blast furnace via desulfurizer desulphurization, the annual output of about 250,000 tons, desulfurization slag is a general industrial waste, the Environmental Protection Administration Announcement of "recyclable waste." In this study, desulfurization slag, furnace slag, fly ash and other admixtures replace most of the cement, to find the best ratio in order to reduce consumption and waste of natural resources regeneration, the purpose of recycling. In this study, we desulfurization slag and

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Hung, Sheng-Feng, and 洪聖豐. "The effect of the mixture proportion on the reactivity of pozzolanic materials." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/45292225194166638912.

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碩士<br>國立交通大學<br>土木工程系所<br>104<br>The purpose of the research is to find out the best mixture proportion for different reactivities of pozzolan materials. In nowadays of engineering, it’s necessary to use concrete for constructing. With the progress of the times and the technology, the quality requirements of concrete have to be in high level as well. Also, we have to consider the requirements of the economy. Consequently, we often use various mineral admixtures to replace part of cement. Because the mixture of proportion will be different from the requirements of construction, we take one prop

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Narendra, B. S. "Improvement Of Strength Of Soils At High Water Content Using Pozzolanic Materials." Thesis, 2005. https://etd.iisc.ac.in/handle/2005/1488.

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Narendra, B. S. "Improvement Of Strength Of Soils At High Water Content Using Pozzolanic Materials." Thesis, 2005. http://etd.iisc.ernet.in/handle/2005/1488.

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