Results 181 to 190 of about 14,253 (226)

Porosity–strength relation in calcium aluminate cement pastes

Cement and Concrete Research, 2003
The compressive strength and the volume porosity of calcium aluminate cement pastes have been studied in order to connect their relationship. The influence of mass fraction of lithium carbonate on compressive strength and porosity of calcium aluminate cement (CAC) has been investigated at different water– cement (w/c) ratios.
Matusinović, Tomislav, Šipušić, Juraj, Vrbos, Nevenka   +2 more
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Osteogenic cell response to calcium aluminate‐based cement

International Endodontic Journal, 2016
AbstractAimTo evaluate the effect of a calcium aluminate‐based cement (CAC+) on the development of the osteogenic phenotype in vitro.MethodologyRat calvaria‐derived cells were grown on Thermanox® coverslips for 24 h and then exposed to either samples (4‐h set) of CAC+ or mineral trioxide aggregate (MTA) placed on Transwell® inserts for periods of up to
L M S, Castro-Raucci, L N, Teixeira, I R, Oliveira, W, Raucci-Neto, M, Jacobovitz, A L, Rosa, P T, de Oliveira   +6 more
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Calcium aluminate cement tapes – Part II: Physical properties

Journal of the European Ceramic Society, 2014
Tape casting is a process often used for the preparation of microelectronics substrates. The present work is a continuation of the first part where we have discussed the structural and microstructural characteristics of calcium aluminate cement tape.
El Hafiane, Y., Smith, Agnès, Abouliatim, Younes, Chartier, Thierry, Nibou, Lahbib, Bonnet, Jean-Pierre   +5 more
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Vinylphosphonic acid-modified calcium aluminate and calcium silicate cements

Journal of Materials Science, 1996
Cementitious materials in terms of calcium phosphate cements (CPC) were prepared through the acid-base reaction between vinylphosphonic acid (VPA) and calcium aluminate cement (CAC) reactants or calcium silicate cement (CSC) reactants at 25 °C. Using CAC, two factors were responsible for the development of strength in the cements: one is the formation ...
T. Sugama, R. N. Mora
openaire   +1 more source

Properties of hot-pressed calcium aluminate cements

Cement and Concrete Research, 1975
Abstract Simultaneous heating and pressing techniques were applied to ordinary calcium aluminate cements (40% Al2O3) and high aluminate (72%) cement. The compressive strength of the former, when hot pressed at 50, 000 psi, 250°C, 1 2 hr. is 51, 000 psi, while the latter is 45, 000 psi.
George R. Gouda, Della M. Roy
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Halting the calcium aluminate cement hydration process

Ceramics International, 2011
Abstract Calcium aluminate cement reactions with water result in anhydrous phases dissolution, followed by nucleation and crystal growth of hydrate compounds. Due to the dynamic characteristics of this process and in order to evaluate the phase transformation kinetics of such materials, suitable methods to halt hydration are required.
A.P. Luz, V.C. Pandolfelli
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High-performance concretes from calcium aluminate cements

Cement and Concrete Research, 1999
Calcium aluminate cements have a radically different chemistry to Portland cements. Due principally to their higher cost, they do not compete directly with Portland cements. Nevertheless, concretes based on these cements have very high performance in specific applications.
Karen L. Scrivener, Jean-Louis Cabiron, Roger Letourneux   +2 more
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Calcium aluminate cement hydration

2008
Iako je hidratacija aluminatnog cementa (AC) proces od temeljne industrijske i komercijalne važnosti, kemijske reakcije pri hidrataciji nedovoljno su razjašnjene. Znanstvena istraživanja s područja malobrojna su u usporedbi s istraživanjima na portland cementu.
Ukrainczyk, Neven, Šipušić, Juraj, Dabić, Pero   +2 more
openaire  

Kinetic modeling of calcium aluminate cement hydration

Chemical Engineering Science, 2010
The hydration of iron-rich calcium aluminate cement (CAC) has been investigated by differential calorimeter and quantitative powder X-ray diffraction (QXRD). A simplified stoichiometric model of early age CAC hydration based on reaction schemes of the principal mineral monocalcium aluminate was employed. The CAC characteristic feature of retardation of
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Calcium chloride‐enriched calcium aluminate cement promotes in vitro osteogenesis

International Endodontic Journal, 2018
AbstractAimTo evaluate the effects of 2.8% or 10% calcium chloride (CaCl2) in calcium aluminate cement (CAC) with either bismuth oxide (Bi2O3) or zinc oxide (ZnO) as radiopacifiers on the progression of osteogenic cell cultures.MethodologyRat calvaria‐derived cells were grown on Thermanox® coverslips for 24 h and exposed to samples of (i) CACb: with 2 ...
L. M. S. Castro‐Raucci, L. N. Teixeira, A. F. S. Barbosa, R. R. Fernandes, W. Raucci‐Neto, M. Jacobovitz, I. R. Oliveira, P. T. de Oliveira   +7 more
openaire   +2 more sources