Relevant bibliographies by topics / Alumina cement

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Academic literature on the topic 'Alumina cement'

Author: Grafiati
Published: 4 June 2021
Last updated: 28 February 2023

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Journal articles on the topic "Alumina cement"

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Kotsay, Galyna, and Irmina Masztakowska. "The Effect of Fine-Ground Glass on the Hydration Process and Properties of Alumina-Cement-Based Composites." Materials 14, no. 16 (August 17, 2021): 4633. http://dx.doi.org/10.3390/ma14164633.

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This paper discusses studies regarding the impact of fine-ground glass additives on the hydration and properties of alumina cement pastes and mortars. Fine-ground glass was added to pastes and mortars instead of high-alumina cement and calcium aluminate cement in quantities of 5% and 10%. The findings are inconclusive as to the impact of glass on the properties of tested alumina cement types. The effect produced via the addition of glass instead of cement depends on the type of alumina cement used. Adding fine-ground glass to high-alumina cement enhances the paste’s density while improving paste and mortar strength. Using the same additive for calcium aluminate cement reduces its density and strength. The addition of glass to high-alumina cement adversely affects its strength at higher temperatures.
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Xia, Zhong Feng, Zhou Fu Wang, Xi Tang Wang, Hao Liu, and Yan Ma. "Effect of Micro-Sized Alumina Powder on the Hydration Process of Calcium Aluminate Cement." Solid State Phenomena 281 (August 2018): 249–54. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.249.

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Micro-sized alumina powder is widely used in low cement high-alumina refractory castables. The hydration of calcium aluminate cement can be affected by adding micro-sized alumina powder. This work addresses the hydration of a commercial cement at 25°C with 50 wt% micro-sized alumina powder added. The hydration heat was measured by isothermal micro-calorimetry. The phase composition and microstructure of the hydration products at the designated times were studied by XRD and SEM, respectively. The results showed that micro-sized alumina powder accelerated the dissolution of CAC. The induction period of the cement hydration reduced from 13h to 4.5h, and the hydration heat within 50hs was increased from 469J/g to 587J/g with the addition of micro-sized alumina powder. The morphology of the hydrates was flocculent amorphous at the beginning, and then transformed to short rods or cubic shape with micro-sized alumina powder added.
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Kuzin, V. I., R. V. Zubashchenko, D. A. Timoshenko, and M. A. Trubitsyn. "Production of fine-ground aluminas NK-Alumina 11 and NK-Alumina 14 for low-cement refractory castables." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 5 (November 26, 2021): 94–97. http://dx.doi.org/10.17073/1683-4518-2021-5-94-97.

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The characteristics of fine-ground aluminas NK-Alumina 11 and NK-Alumina 14, developed in JSC «PKF «NK», for low-cement refractory castables are presented. It is shown that the quality indicators of the developed aluminas are not inferior to foreign analogues.
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Angelescu, Nicolae, Cristina Stancu, Sofiane Amziane, Vasile Bratu, and Elena Valentina Stoian. "Study on Hydration and Strengthening of High Alumina Cements." Scientific Bulletin of Valahia University - Materials and Mechanics 15, no. 12 (April 25, 2017): 22–27. http://dx.doi.org/10.1515/bsmm-2017-0004.

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Abstract Refractory concretes based on aluminous cements are used with great success in areas where high temperatures are required. The mineralogical composition of the high alumina cement is the main factor which gives the physical and mechanical properties at high temperatures of refractory monolithic materials.It is therefore desirable to use high alumina cements based on mineralogical compounds with high refractoriness, because in the end those beneficial properties can be found in the final product - refractory concrete.The aim of this paper is to design, realize and characterize different compositions of high alumina cements based on mineralogical compounds with the highest refractory from the CaO-Al2O3 binary system (i.e. CA, CA2, and CA6), and to find ways of hydraulic activation of calcium hexa aluminate, also.
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Kaddo, Maria. "Possibilities of using aluminate cements in high-rise construction." E3S Web of Conferences 33 (2018): 02056. http://dx.doi.org/10.1051/e3sconf/20183302056.

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The article describes preferable ways of usage of alternative binders for high-rise construction based on aluminate cements. Possible areas of rational use of aluminate cements with the purpose of increasing the service life of materials and the adequacy of the durability of materials with the required durability of the building are analyzed. The results of the structure, shrinkage and physical and mechanical properties of concrete obtained from dry mixes on the base of aluminate cements for self-leveling floors are presented. To study the shrinkage mechanism of curing binders and to evaluate the role of evaporation of water in the development of shrinkage was undertaken experiment with simple unfilled systems: gypsum binder, portland cement and «corrosion resistant high alumina cement + gypsum». Principle possibility of binder with compensated shrinkage based on aluminate cement, gypsum and modern superplasticizers was defined, as well as cracking resistance and corrosion resistance provide durability of the composition.
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Hemanth Kumar, G., and B. Ajitha. "Prediction of Compressive Strength of Nano Alumina, Micro Alumina & Fly Ash Blended with Cement by Using Coefficient of Correlation." Asian Review of Civil Engineering 9, no. 2 (November 5, 2020): 8–11. http://dx.doi.org/10.51983/tarce-2020.9.2.2557.

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In this research study, the effect on High Strength Concrete (HSC) by partial replacement of cement with Nano alumina, micro alumina and fly ash on the mechanical properties of the concrete is studied. In this investigation the cement is replaced by 20% Fly ash, 5% micro alumina and nano alumina of different proportion i.e., 0.25%, 0.5%, 0.75%, 1% in M60 grade of concrete. It is observed that the concrete's workability is reduced by increasing the content of nano alumina from 0% to 1% and constant micro alumina particles of 5% cement (by Wt.) and fly ash of 20% cement (by wt.). The results showed that 0.75% of the combination of nano alumina, micro alumina and fly ash increases the properties of the high strength concrete. The microstructure characteristics results revealed that the Nano alumina, micro alumina and fly ash particles incorporated enhances the cement's mechanical strength properties and the voids were filled up with these materials. The present investigation is mainly focused on reliability assessment to the High Strength Concrete by using by using Karl Pearson’s correlation coefficient.
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Zhao, Jing Ming, Kyu Hong Hwang, Jong Kook Lee, and Min Cheal Kim. "Application of Magnesia-Phosphate Cement for Chromia/Alumina Castables." Applied Mechanics and Materials 268-270 (December 2012): 625–28. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.625.

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Refractory castables containing calcium aluminate cement (CAC) are widely used in a range of furnace lining applications in the iron and steel, cement, glass, ceramic, and petrochemical industries. However, magnesia-phosphate cement (MPC) based material could be a new types of cement material, with many advantages such as rapid hydration, high early strength and circumstance suitability, which has very important value and wide application. In this study, MPC was used at Chromia/Alumina castable as binder addition instead of conventional calcium aluminate cement. Meanwhile, it also explains the relationship between the micro-mechanism and performance by micro methods such as SEM. The results shows that MPC based castables have good corrosion resistance, interface adhesiveness and abrasion resistance.
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Bondarenko, N., D. Bondarenko, and E. Evtushenko. "STUDY OF THE CHEMICAL INTERACTION OF GLASS FIBER WITH CEMENT HYDRATION PRODUCTS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 5, no. 12 (January 8, 2021): 119–25. http://dx.doi.org/10.34031/2071-7318-2020-5-12-119-125.

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Reinforcement of concrete with fiberglass improves the performance properties of concrete. The object of the study is fiberglass concrete, where Portland cement or alumina cement is used as a binder, and silica fiberglass is used as a filler. The chemical and phase compositions of Portland cement and alumina cement have been studied. The influence of the products of hydration of Portland cement and alumina cement on the chemical resistance of glass fiber has been investigated. The phase composition of Portland cement and alumina cement after hydration is studied using X-ray phase analysis. It is revealed that the following phases are present in alumina cement: CaОAl2O3, MgОAl2O3, 12CaO•7Al2O3, 2CaO•Al2O3•SiO, the phase composition of Portland cement is Ca6Al2(SO4)3(OH)12•12H2O, Ca2,25(Si3O7,5(OH)1,5)•(H2O), Ca(OH)2, CaCO3. It has been found that when hydrated, Portland cement has a negative effect on fiberglass due to the presence of Ca(OH)2 in it. The phase composition of the alumina cement after hydration shows the absence of Ca(OH)2. The chemical composition of fiberglass is investigated using X-ray fluorescence analysis. The use of alumina cement when using non-alkali-resistant fiberglass in a composite material is substantiated. The study of the stability of fiberglass in the environment of cement drawing has been carried out. Studies have shown that KV-11 grade fiberglass interacted less with hydration products of alumina cement than with hydration products of Portland cement.
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PAGHANDEH, M., A. MONSHI, and R. EMADI. "THE EFFECT OF FINE ALUMINA TYPE ON COMPOSITION OF IN SITU SPINEL FORMATION IN ALUMINA-MAGNESIA CASTABLES." International Journal of Modern Physics B 25, no. 27 (October 30, 2011): 3633–39. http://dx.doi.org/10.1142/s0217979211101211.

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Three types of low cement castables (LCC) were prepared from 5% reactive alumina ( R 5), 5% calcined alumina ( A 5) and equal proportions of 2.5% (AR). The nest of the composition was fine bauxite (0–1 mm, 57%), coarse bauxite (1–3 mm, 20%), calcined magnesia (5%), secar 71 refractory cemet (7%) and microsilica (1%). By the addition of 5% water, castables were moulded, aged, dried and fired to 1400°C for 2 h. XRD studies showed higher amount of in situ spinel formation in A 5. The lattice constants of spinels in A 5, AR and R 5 were, respectively, 8.0348, 8.0688 and 8.0847 Å. This accounted for respectively alumina rich, stochiometry and magnesia rich spinels. Since calcined alumina is cheaper, produce higher amounts of spinel with the aid of alumina from the aggregate of bauxite and the binder of cement, and alumina rich spinel has better corrosion resistance properties, use of calcined alumina is recommended in LCC.
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Qin, Min, Nai Xing Liang, and Zhao Feng Lu. "Performance Study on Alumina Red Mud-Cement Stabilized Macadam Base." Advanced Materials Research 250-253 (May 2011): 728–32. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.728.

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Based on the analysis of chemical constituents and mineral composition, a new disposal method of alumina red mud added in cement stabilized macadam base was put forward. Through experiments of compressive strength, dynamic elastic modulus, splitting intensity and resilient modulus, mechanical properties of alumina red mud- cement stabilized macadam base and base performance affected by alumina red mud dosage were studied. Also, the strength formation micro-mechanism of alumina red mud-cement stabilized macadam mixture was explored by scanning electron microscopy (SEM). The results indicate that alumina red mud-cement stabilized macadam mixture has good mechanical properties; its early compressive strength, early splitting intensity, dynamic elastic modulus, resilient modulus are improved obviously with alumina red mud mixing; the mixing amounts of alumina red mud and cement are significantly affected mixture strength and the optimum mixing amount is respectively 10~12% and 5~6%; alumina red mud can promote cement hydration and hydrates generation. it not only is used as interstitial material among aggregates，also as binder closely linked aggregates through the spatial reticular structure formed by red mud and cement hydrates, which enhance mixture strength.
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Dissertations / Theses on the topic "Alumina cement"

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Ding, Jian. "Conversion prevention in high alumina cement products." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9683.

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Mechanisms of stratlingite (C$\rm\sb2ASH\sb8)$ formation in the high alumina cement (HAC)--siliceous material--water systems were investigated. Different siliceous materials, e.g. natural zeolites, silica fume, fly ash, ground granulated blast-furnace slag, and different sodium salts, e.g. sodium silicate, sodium sulfate, etc. were employed. Reactions between CAH$\sb $ or C$\rm\sb2AH\sb8$ and dissolved silica occur. Acceleration of the silica dissolution by addition of chemical admixtures promoted the formation of stratlingite. A method for prevention of strength reduction of HAC products due to the conversion of thermodynamically unstable hexagonal calcium aluminates to cubic hydrogarnet is described. New conversion-preventing additives (CPA) to inhibit hydrogarnet formation in HAC products are described. Compressive strength development of HAC mortars containing the CPA additive was studied. The effect of curing conditions on strength development was also investigated. No strength reduction occurs for the HAC/CPA mortar water-cured at 38$\sp\circ$C. Stratlingite preferentially formed in the HAC paste containing the CPA additive. Durability of inhibited HAC products is also studied. Conversion inhibited high alumina cement binders have excellent characteristics for corrosion protection of reinforcement under severe test conditions. The HAC/CPA mortar can effectively resist the penetration of chloride ions. (Abstract shortened by UMI.)
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Baker, Nina Crampton. "High alumina cement in the marine environment." Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316529.

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Zamri, Diyana. "Biogenic and chemical corrosion of calcium aluminate cement in sour media." Thesis, The University of Sydney, 2012. http://hdl.handle.net/2123/19260.

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Gill, Susan Margaret. "The effect of superplasticising admixtures on the performance of ciment fondu." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279745.

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Kawamura, Mirian Akiko. "Evolução microestrutural de cerâmicas porosas moldáveis à base de alumina e ligadas com cimento de aluminato de cálcio (CAC) e alumina hidratável (AH) durante aquecimento inicial até 1500°C." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-12032018-103724/.

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Cerâmicas porosas encontram um vasto campo de aplicações tecnológicas, tais como isolantes térmicos em equipamentos siderúrgicos, filtros de fluidos em altas temperaturas e biomateriais. A obtenção dessas estruturas por meio de moldagem direta de suspensões aquosas é uma interessante técnica de conformação, pois, peças com geometrias complexas e de grandes volumes podem ser produzidas. Neste caso, a consolidação ocorre, geralmente, pela ação de um ligante hidráulico, cuja função é garantir níveis mínimos de resistência mecânica à verde. Em sistemas refratários, os ligantes mais utilizados são o cimento de aluminato de cálcio (CAC) e alumina hidratável (AH), devido à alta refratariedade e custos competitivos destes materiais. Nas estruturas porosas à base de alumina, particularmente, eles podem proporcionar valores distintos de porosidade e diferentes tipos de microestruturas. Este trabalho teve como objetivo entender como o CAC e a AH interagem com a alumina. Foram avaliados a evolução microestrutural e os efeitos do teor (10 até 40% em volume de ligante hidráulico) e do tamanho das partículas da matriz (alumina fina e grossa) nas amostras à verde e durante o aquecimento inicial até 1500°C. De modo geral, maiores volumes de ligantes permitiram a obtenção de estruturas à verde mais rígidas e resistentes, porém menos porosas. Além da porosidade total (PT), as microestruturas decorrentes das transformações de fases cristalinas ou amorfas também influenciaram os resultados mecânicos. No caso do CAC, as fases formadas durante as reações in situ ajudaram a melhorar as propriedades mecânicas das amostras, mesmo que acompanhado por um acréscimo em porosidade. Em proporções estequiométricas, os cristais de hexaluminato de cálcio (CA6) formados após tratamento a 1500°C inibiram a densificação, ajudando na manutenção da PT (36,7-46,5%), ainda com boa resistência (acima de 20 MPa em compressão diametral). Nos sistemas ligados com AH, observou-se grandes perdas em propriedades mecânicas antes da sinterização, as quais foram relacionadas ao aumento de densidade real dos precipitados do ligante e à perda de conexão entre as partículas da matriz. Em altas temperaturas, os precipitados de AH auxiliaram a sinterização e garantiram a obtenção de peças porosas quando se utilizou alumina grossa (PT: 44,3-47,7%).
Porous ceramics have a wide range of technological applications, such as thermal insulation in steelmaking furnaces, filter for high temperature fluids and as biomaterials. Obtaining these structures through the direct casting of aqueous suspensions is an interesting conformation method since pieces with complex geometries and large volumes can be produced. In this case, the consolidation usually occurs by the action of a hydraulic binder, which provides the minimum levels of mechanical strength in green samples. In refractory systems, the most used binders are calcium aluminate cement (CAC) and hydratable alumina (HA), due to the high refractoriness and competitive costs of these materials. Particularly, in porous alumina-based structures, they can provide distinct values of porosity and different types of microstructures. The purpose of the present work is to understand how CAC and HA interact with alumina. The effects of the binder content (from 10 up to 40% in volume) and the particle size of the matrix (fine and coarse) during initial heating up to 1500°C were studied. In general, larger volumes of binders provided green samples with less porosity but higher mechanical strength. Besides total porosity (TP), the microstructures generated from the transformations of crystalline or amorphous phases also influenced the mechanical results. In the case of CAC, the phases formed by in situ reactions improved the mechanical properties of the samples, despite the increase in porosity. In stoichiometric proportions, the crystals of calcium hexaluminate (CA6) formed after treatment at 1500°C inhibited the densification, favoring to maintain total porosity (36.7-46.5%), even with acceptable mechanical properties (above 20 MPa under diametric compression). In HA-bonded systems, before the sintering begins, a decrease in mechanical properties was noted and related to the increase in density of the precipitates and loss of connection between the matrix particles. At high temperature, the precipitates from HA aided the sintering and guaranteed porous samples in coarse alumina composition (TP: 44.3- 47.7%).
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Alireza, S., K. N. Fatemeh, and S. Hossein. "Improving thermo-mechanical properties of tabular alumina castables via using nano structured colloidal silica." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20571.

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Great attempts were made to reduce the amount of calcium aluminate cement (CAC) content in refractory castables to improve their hot strength. Using more than 2-3 wt% CAC may cause low melting phases formation in the refractory matrix leading to weak thermo-mechanical propereties of the castables. Colloidal Silica can affect the structure of refractory castables to achieve superior thermo mechanical properties. Replacing calcium aluminate cement (CAC) by colloidal silica as a water base binder, speeds up drying, reduces the amount of liquid phase at high temperatures and may lead to mullite formation, which will increase the hot strength of the refractory castables. In this research, the influence of colloidal silica addition on bulk density, apparent porosity and HMOR of a tabular alumina based refractory castable containing have been studied. The results showed that samples containing colloidal silica have higher hot strength compared to those containing only CAC as binder due to the better compaction, less liquid phase formation at high temperature. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20571
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Schmidt, Heinrich. "X-ray diffraction study of high temperature reaction products in the barium oxide-silica-alumina-ferric oxide system." Thesis, Pretoria : [s.n.], 2001. http://upetd.up.ac.za/thesis/available/etd-03072007-132505.

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Souza, Alexandre Luiz de. "Determinação simultânia de Cd/Pb em cimento usando TI como padrão interno e de Cr/Mn em alumina por espectrometria de absorção atômica com amostragem de suspensão." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-19102007-105035/.

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O objetivo desse trabalho foi o desenvolvimento de métodos analíticos para a determinação simultânea de Cd/Pb em cimento e Cr/Mn em alumina por espectrometria de absorção atômica com atomização eletrotérmica (SIMAAS) e amostragem de suspensão. Considerando os erros de amostragem de suspensão e as condições compromissadas impostas para a determinação simultânea, foi também objetivo do trabalho estudar a aplicação de padrão interno para corrigir erros sistemático e aleatório. A viabilidade de se usar o Tl como padrão interno foi explorada na determinação de Cd e Pb em cimento. O uso do padrão interno se baseou na hipótese de que o elemento Tl deveria adsorver quantitativamente sobre as partículas do material em suspensão. Foi feito o estudo térmico dos elementos Cd, Pb e Tl em soluções aquosas e suspensões, na presença e ausência de diferentes modificadores químicos. O melhor modificador químico (5 µg Pd + 3 µg Mg) foi escolhido com base nos gráficos de correlação. As melhores temperaturas de pirólise e atomização para a determinação simultânea de Cd e Pb foram 600°C e 2000°C, respectivamente. A preparação das amostras foi feita com suspensões contendo 30 µg L-1 de Tl em 0,1 % (v v-1) de HNO3 + 0,025 % (m v-1) de Triton X-100. A avaliação da exatidão foi feita com a determinação de Cd e Pb em cimento de construção civil e dentário com análise de solução e análise de materiais de referência de sedimento marinho (MESS1 e BCSS 1) e de rio (Buffalo River, IEAEA 356). Os resultados foram concordantes em um nível de confiança de 95% (teste t-student). Os limites de detecção (LD) obtidos foram 0,14 µg L-1 (1,4pg) para o Cd e de 1,2 µg L-1 (12 pg) para Pb. As massas características foram 1,2 pg e 25 pg para Cd e Pb, respectivamente. Na determinação simultânea de Cr e Mn em alumina não foi utilizado padrão interno. O estudo envolveu a obtenção de curvas de pirólise e atomização em presença de diferentes modificadores. Estudos de interferência mostraram que 100 mg L-1 de Al provocaram aumento nos sinais analíticos dos elementos que foi eliminado com o modificador químico NaOH (0,2 mol L-1) + HF (0,4 mol L-1) combinado com 350 µg de Nb. Nessa condição as temperaturas de pirólise e atomização foram 1400°C e 2400°C, respectivamente. As suspensões de alumina foram preparadas em 2 % (v v-1) HNO3. A avaliação da exatidão foi feita com a determinação de Cr e Mn em material de referência de alumina (Alumina Reduction Grade - 699) e os resultados foram concordantes em um nível de confiança de 95% (teste t-student). Os limites de detecção (LD), estimados a partir da variabilidade de 20 medidas consecutivas de uma solução contendo 2 % (v v-1) HNO3 foram 0,11 µg L-1 (2,2 pg) para Cr e 0,17 µg L-1 (3,5 pg) para o Mn. As massas características foram 10 pg e 1,3 pg para Cr e Mn, respectivamente.
The aim of this work was the development of analytical methods for the simultaneous determination of Cd/Pb in cement and Cr/Mn in alumina by electrothermal atomic absorption spectrometry (SIMAAS) and slurry sampling. Considering the errors of slurry sampling and the imposed compromissed conditions for the simultaneous determination, it was also the aiming of this work to study the application of internal standard for the sistematic and random errors correction. The viability of using Tl as internal standard was investigated for Cd and Pb determination in cement. The internal standard aplicability was based on the hypothesis of the element Tl would have to adsorver quantitatively on the particles of the material in suspension. The thermal behaviour of Cd, Pb and Tl in aqueous solutions and suspensions was obtained in presence and absence of different chemical modifiers. The best chemical modifier (5 mg Pd + 3 mg Mg) was chosen based on correlation graphs. The pyrolysis and atomization temperatures for the simultaneous determination of Pb were 600°C and 2000°C, respectively. The sample the preparation was made with 30 mg L-1 of Tl in 0,1% (v v-1) of HNO3 + 0.025% (m v-1 of Triton X-100. The evaluation of the accuracy was made with the determination of Cd and Pb in cement, microwave extraction in acid media and analysis of marine sediment reference materials (MESS1 and BCSS 1) and river sediment (Buffalo River, IEAEA 356). The results are concordant at 95% of confidence level using Studen\'s t-test. The detention limits (LD) was 0.14 µg L-1 (1.4 pg) for Cd and 1.2 µg L-1(12 pg) for Pb. The characteristic masses were 1.2 pg and 25 pg for Cd and Pb, respectively. The simultaneous determination of Cr and Mn in alumina was done without internal standard. Pyrolysis and atomization temperaturas were obtained in presence of different modifiers. Studies of interference shown that 100 mg L-1 of Al provoked increase in the analytical signals of Cr and Mn that was eliminated with the chemical modifier NaOH (0,2 mol L-1) + HF (0,4 mol L-1) combined with 350 mg of Nb as permanent chemical modifier. In this condition pyrolysis and atomization temperatures were 1400 °C and 2400 °C, respectively. The alumina suspensions were prepared in 2% (v v-1) HNO3. The evaluation of the accuracy was made with the determination of Cr and Mn in alumina reference material (Reduction Alumina Grating - 699) and the results were concordant at 95 % of the confidence level using Student\'s t-test. The detention limits (LD) were 0.11 µg L-1 (2.2 pg) for Cr and 0.17 µg L-1 (3.5 pg) for Mn. The characteristic masses were 10 and 1.3 pg for Cr and Mn, respectively.
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Fridrich, Jakub. "Cihelný recyklát jako surovina pro výrobu pálících pomůcek pro cihlářský průmysl." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401935.

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The focus of this thesis is the study of behavior of brick waste in the mixture with high alumina cement. The result of this research should be a draft of a composition and production process for material that could partly or fully substitute forging accessories in the brick production industry. The aim of this work is to verify the use of brick waste for such purpose. Usage of brick waste for refractories can help the current long-term effort for wasteless production processes.
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Carvalho, Renato Savi de. "Efeito de um agente primer e de ciclos térmicos para cocção de porcelana na resistência de união adesiva entre alumina e cimento resinoso." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/25/25131/tde-05112009-104837/.

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Coroas cerâmicas apoiadas sobre infra-estruturas de alumina densamente sinterizada configuram-se como excelentes opções para a reabilitação protética em casos de exigência estética, contudo, o aumento do conteúdo cristalino inviabiliza seu condicionamento por ácidos deixando a maneira ideal de cimentá-las ainda desconhecida. Coroas Procera AllCeram apresentam, em sua face interna, micro irregularidades interessantes ao embricamento e adesão resinosa, dispensando manobras de condicionamento. Objetivo: O objetivo deste trabalho foi avaliar a influência de elevadas temperaturas (500ºC à 950ºC) necessárias à cocção da porcelana de revestimento, na textura superficial da alumina, bem como o papel de um agente primer (Ivoclar Vivadent) na força de adesão entre alumina e cimento resinoso. Material e métodos: Sessenta (60) cilindros de alumina (3,5mm X 16mm) com rugosidade superficial idêntica à dos copings Procera foram divididos em quatro grupos (n=15). Grupo 1): Espécimes não submetidos a variação térmica, sendo G1a Sem aplicação do primer e G1b Com aplicação do primer e Grupo 2): Espécimes submetidos aos ciclos térmicos para cocção da porcelana feldspática, sendo G2a Sem aplicação do primer e G2b Com aplicação do primer. Sobre os cilindros aplicou-se porção do cimento resinoso químico MultiLink Ivoclar. Os espécimes foram levados a uma máquina de ensaios Universal para teste de cisalhamento a uma velocidade de 0.5mm/min e os dados submetidos à análise de variância a um critério e teste de comparações múltiplas de Tukey. Resultados: A força de adesão para cada um dos grupos foi: G1a = 2.468 MPa; G1b = 4.265 MPa; G2a = 2.339MPa e G2b = 4.185 MPa. Diferenças significantes foram observadas entre os grupos: G1a X G1b; G1a X G2b; G1b X G2a e G2a X G2b. Conclusões: Ciclos térmicos não produziram alterações na micro-estrutura superficial da alumina, tampouco comprometeram sua adesão ao cimento. O agente primer aumentou a força de união entre alumina e cimento resinoso. Fraturas coesivas do agente cimentante foram observadas apenas em alguns espécimes primer-tratados.
High-strength alumina based ceramic crowns are widely used in dentistry due to their favorable esthetic, however, the large amount of crystalline contents jeopardizes their acid etching property and the ideal luting remains unclear. Procera AllCeram restorations exhibits on their intaglio surface micro irregularities optimizing the bonding to resin, with no need for additional conditioning procedures. Purpose: The aim of the present study was to evaluate the influence of high thermal cycles (500ºC to 950ºC) needed to porcelain firing on alumina´s intaglio surface, as well as, the role of a primer agent (Ivoclar Vivadent) on shear bond strength between alumina and resin cement. Material and Methods: Sixty alumina cylinders (3,5mm X 16mm) with intaglio roughness of the Procera AllCeram copings were randomly divided into four groups (n=15). Group 1) Samples no submitted to thermal cycles variation, were G1a - no primer application and G1b - primer treated and Group 2: Samples submitted to thermal feldspathic porcelain firing cycles, were G2a - specimens no primer treated and G2b - primer treated specimens. Over the cylinders top a self-cure resin cement (Multilink Ivoclar) portion was applied. The specimens were loaded to failure in shear mode using a universal testing machine at a crosshead speed of 0,5mm/min. Data were analyzed with one-way analysis of variance and Tukey´s multiple comparison test. Results: The shear bond strength for each group was: G1a = 2.468 MPa; G1b = 4.265 MPa; G2a = 2.339 MPa e G2b = 4.185 MPa. Significant difference was found between the groups G1a X G1b; G1a X G2b; G1b X G2a e G2a X G2b. Conclusions: Thermal cycles did not change alumina´s surface micro structure, besides did not compromised it´s bonding strength to resin cement. Primer agent enhanced shear bond strength between alumina and resin cement. Luting agent´s cohesive fractures were observed only in some primer treated specimens.
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Books on the topic "Alumina cement"

1

1918-1988, Midgley H. G., and Mangabhai R. J, eds. Calcium aluminate cements: Proceedings of the international symposium held at Queen Mary and Westfield College, University of London, July 9-11, 1990, and dedicated to the late Dr. H.G. Midgley. London: Chapman and Hall, 1990.

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J, Mangabhai R., and Glasser F. P, eds. Calcium aluminate cements 2001: Proceedings of the International Conference on Calcium Aluminate Cements (CAC) held at Heriot-Watt University Edinburgh, Scotland, UK, 16-19 July 2001. London: IOM Communications, 2001.

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Kuznet͡sova, T. V. Ali͡uminatnye i sulʹfoali͡uminatnye t͡sementy. Moskva: Stroĭizdat, 1986.

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Rule, D. L. Low-temperature thermal conductivity of composites: Alumina fiber/epoxy and alumina fiber/PEEK. Boulder, Colo: U.S. Dept. of Commerce, National Bureau of Standards, 1989.

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Rule, D. L. Low-temperature thermal conductivity of composites: Alumina fiber/epoxy and alumina fiber/PEEK. Boulder, Colo: U.S. Dept. of Commerce, National Bureau of Standards, 1989.

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Rule, D. L. Low-temperature thermal conductivity of composites: Alumina fiber/epoxy and alumina fiber/PEEK. Boulder, Colo: U.S. Dept. of Commerce, National Bureau of Standards, 1989.

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Rule, D. L. Low-temperature thermal conductivity of composites: Alumina fiber/epoxy and alumina fiber/PEEK. Boulder, Colo: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Rule, D. L. Low-temperature thermal conductivity of composites: Alumina fiber/epoxy and alumina fiber/PEEK. Boulder, Colo: U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Birnin-Yauri, Umar Abubakar. The effect of admixtures on the hydration of high-alumina cement. Salford: University of Salford, 1987.

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Commission, United States International Trade. Calcium aluminate flux from France. Washington, DC: U.S. International Trade Commission, 1994.

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Book chapters on the topic "Alumina cement"

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Colorado, Henry A., and Jenn-Ming Yang. "Alumina-Based Phosphate Cement." In Developments in Strategic Materials and Computational Design V, 103–10. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119040293.ch8.

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Ohba, Yasuhiro, Hirohide Okuno, Nobuyuki Takeuchi, and Makoto Ishikawa. "No-Cement Alumina - Magnesia Castable." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 977–81. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch166.

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Sengupta, Saptarshi, Tarun K. Roy, and Ramasubramanian N. "Control of Alumina Cement Phase by Process Parameters." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 995–1000. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch169.

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Lifton, V. A., Ch Tontrup, and T. von Rymon Lipinski. "Next Generation Alumina Binder for Cement-free Castables." In Proceedings of the Unified International Technical Conference on Refractories (UNITECR 2013), 1019–24. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118837009.ch173.

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Ilyoukha, Nickolay, and Valentina Timofeeva. "Recycling Wastes in the Alumina and the Cement Industry." In Energy Technology 2015, 227–32. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093220.ch25.

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Ilyoukha, Nickolay, and Valentina Timofeeva. "Recycling Wastes in the Alumina and the Cement Industry." In Energy Technology 2015, 227–32. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48220-0_25.

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Podwórny, J., T. Wala, and J. Sawków. "Microstructural Studies on the Q-Phase in Alumina Cement Clinker." In Solid State Phenomena, 225–28. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-40-x.225.

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Silva, Abílio P., Ana M. Segadães, and Tessaleno C. Devezas. "Particle Distribution Design in a Self-Flow Alumina Refractory Castable without Cement." In Advances in Science and Technology, 2260–65. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/3-908158-01-x.2260.

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Li, Jin Hong, Hong Wen Ma, and Hong Wei Zhao. "Preparation of Sulphoaluminate-Alite Composite Mineralogical Phase Cement Clinker from High Alumina Fly Ash." In Advances in Composite Materials and Structures, 421–24. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.421.

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Claramunt, Josep, Lucia Fernandez-Carrasco, and Mònica Ardanuy. "Mechanical Performance of Flax Nonwoven-Calcium Aluminate Cement Composites." In Strain-Hardening Cement-Based Composites, 375–82. Dordrecht: Springer Netherlands, 2017. http://dx.doi.org/10.1007/978-94-024-1194-2_44.

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Conference papers on the topic "Alumina cement"

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"Deterioration of Alumina Cement Concrete." In SP-100: Concrete Durability: Proceedings of Katharine and Bryant Mather International Symposium. American Concrete Institute, 1987. http://dx.doi.org/10.14359/3835.

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"The Use of Vanadium Production Waste to Produce Alumina Cement." In SP-326: Durability and Sustainability of Concrete Structures (DSCS-2018). American Concrete Institute, 2018. http://dx.doi.org/10.14359/51711029.

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"Durability of High Alumina Cement Mortars for the Marine Environment." In "SP-145: Durability of Concrete -- Proceedings Third CANMET - ACI International Conference, Nice, France 1994". American Concrete Institute, 1994. http://dx.doi.org/10.14359/4552.

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"High Alumina Cement-Silica Fume Mixtures in the Presence of Superplasticizers." In SP-173: Fifth CANMET/ACI International Conference on Superplasticizers and Other Chemical Admixtures in Concrete. American Concrete Institute, 1997. http://dx.doi.org/10.14359/6205.

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"Mechanisms of Stratlingite Formation in High Alumina Cement-Siliceous Material Systems." In "SP-154: Advances in Concrete Technology - Proceeding Second CANMET/ ACI International Symposium - Las Vegas, Nevada, USA". American Concrete Institute, 1995. http://dx.doi.org/10.14359/964.

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Rechkalov, Denis, Sergey Chernogorlov, and Victor Abyzov. "Hydration of alumina cement containing ferrotitanium slag with polycarboxylate-ethers (PCE) additives." In ADVANCED MATERIALS IN TECHNOLOGY AND CONSTRUCTION (AMTC-2015): Proceedings of the II All-Russian Scientific Conference of Young Scientists “Advanced Materials in Technology and Construction”. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4937868.

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Kerr, M. L., and J. M. Pitt. "Resistance of High Alumina and Portland Cement to H 2 SO 4." In International Conference. Reston, VA: American Society of Civil Engineers, 1997. http://dx.doi.org/10.1061/9780784402443.032.

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You, Kwang-Suk, Ji-Whan Ahn, Seong-Ho Lee, Hyoung Woo Lee, and Ki Ung Lee. "The Synthesis of Calcium Sulfoaluminate-Calcium silicate Blended Cement with Alumina Waste." In 5th Asian Particle Technology Symposium. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-2518-1_379.

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Koňáková, Dana, Eva Vejmelková, Vojtěch Pommer, Martin Keppert, Anton Trník, and Robert Černý. "Physical and chemical characteristics of heat resistant materials based on high alumina cement." In CENTRAL EUROPEAN SYMPOSIUM ON THERMOPHYSICS 2021 (CEST 2021). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0069565.

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Obata, Masamichi, Masaaki Kaneko, Michitaka Saso, Nobuhito Ogaki, Taichi Horimoto, and Toshikazu Waki. "Solidification of Simulated Liquid Waste of Primary Loop Resin Elution Process of PWR." In ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2010. http://dx.doi.org/10.1115/icem2010-40026.

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Primary loop resin waste is eluted by sulfuric acid in The Kansai Electic Company Mihama, Takahama and Ohi nuclear power station. Waste solution from this elution process is planned to be solidified by cement. This study bring out a range of chemical composition and crud concentration of waste solution from this elution process, and examine the properties of alumina cement solidification process and solidified material. Test for sulfate ion, borate, lithium, ammonium ion was carried out. Volume reduction ratio of over 0.5 was achieved for 5 to 25wt% of sulfate ion and <5,000ppm of borate. Lithium ion restrained the solidification delay by borate. Also, ammonium ion shows no significant effect. Based on this study, we concluded that the aluminum cement is applicable to all range of composition of waste solution from the resin elution process. This study is a part of committed work of The Kansai electric company.
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Reports on the topic "Alumina cement"

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SUGAMA, T., and L. E. BROTHERS. CITRIC ACID AS A SET RETARDER FOR CALCIUM ALUMINATE PHOSPHATE CEMENTS. Office of Scientific and Technical Information (OSTI), January 2005. http://dx.doi.org/10.2172/15011163.

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Langton, C., and D. Stefanko. BLENDED CALCIUM ALUMINATE-CALCIUM SULFATE CEMENT-BASED GROUT FOR P-REACTOR VESSEL IN-SITU DECOMMISSIONING. Office of Scientific and Technical Information (OSTI), March 2011. http://dx.doi.org/10.2172/1011327.

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