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Author: chiara ferraris

Displaying records 21 to 30 of 87 records.
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21. Mixture Proportioning Options for Improving High Volume Fly Ash Concretes
Published: 9/1/2010
Authors: Dale P Bentz, Chiara F Ferraris, Max A Peltz, John A. Winpigler
Abstract: High volume fly ash (HVFA) concretes are one component of creating a more sustainable infrastructure. By replacing 50 % or more of the portland cement with fly ash, a significant reduction is achieved in the carbon footprint of the in place concrete ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904818

22. A Numerical Study of the Flow of Bingham-Like Fluids In Two Dimensional Vane And Cylinder Rheometers Using a Smoothed Particle Hydrodynamic (SPH) Based Method
Published: 4/7/2010
Authors: Huaning Zhu, Nicos Martys, Chiara F Ferraris, Daniel De Kee
Abstract: A vane rheometer is commonly used to determine the rheological properties of suspensions, colloids such as cement-based materials, many of which can be described as a Bingham fluid. Due to the complex flow geometry of the vane rheometer, relating mea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860722

23. Rheology and Setting of High Volume Fly Ash Mixtures
Published: 4/1/2010
Authors: Dale P Bentz, Chiara F Ferraris
Abstract: While high volume fly ash (HVFA) concretes can be designed and produced to meet 28-d strength requirements and often even exceed the durability performance of conventional concretes, a persistent problem is the potentially long delay in setting time ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904150

24. Summer Undergraduate Research Fellowships (SURF) at the National Institute of Standards and Technology: A NSF/NIST Partnership
Published: 2/1/2010
Authors: Christopher C White, Chiara F Ferraris, Lisa Jean Fronczek, Joseph J Kopanski, David B Newell
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905488

25. Measurement of yield stress for concentrated suspensions using a plate device
Published: 1/1/2010
Authors: Min-Hong Zhang, Chiara F Ferraris, Huaning Zhu, Vincent Picandet, Max A Peltz, Paul E Stutzman, Daniel De Kee
Abstract: Slump has often been correlated with the yield stress of concrete as defined by the Bingham model. The discussion is still open as to what the yield stress value actually is and how to measure the yield stress of a suspension in general and for a cem ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861568

26. Virtual Cement and Concrete
Published: 9/1/2009
Authors: Jeffrey W Bullard, Chiara F Ferraris, Edward Joseph Garboczi, Nicos Martys, Paul E Stutzman, Judith Ellen Terrill
Abstract: Design and optimization of cement or concrete mixes typically is accomplished by intensive trial-and-error experimentation, primarily because the design space has many parameters and because interactions between these parameters are incompletely unde ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861552

27. REFERENCE MATERIALS FOR RHEOMETERS AND THE FLOW TABLE
Published: 8/3/2009
Authors: Chiara F Ferraris, Zughuo Li, Mona Mohseni, Nicholas Franson
Abstract: Oil is the most used standard material for the calibration of rheometers. Other products are used to calibrate flow devices, i.e., the flow table is calibrated using a mixture of oil and silica powder. The oil is a Newtonian liquid while the oil-sili ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902616

28. Rheological Properties of Cement Pastes: A Discussion of Structure Formation and Mechanical Property Development
Published: 11/11/2008
Authors: Gaurav Sant, Chiara F Ferraris, Jason Weiss
Abstract: The objective of this paper is to examine the evolution of rheological properties (e.g. yield stress) and to evaluate the use of these properties as a way to monitor structure formation and mechanical property development in cementitious systems. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860723

29. Etude de la mesure de la contrainte seuil l aide d une plaque mobile : application aux p tes de ciment
Published: 10/1/2008
Authors: Vincent Picandet, Chiara F Ferraris
Abstract: Un dispositif de conception assez simple a été développé pour mesurer directement le seuil de cisaillement de diverses suspensions concentrées. Il consiste en une plaque immergée verticalement dans le mat&eac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861634

30. Parallel-Plate Rheometer Calibration Using Oil and Lattice Boltzmann Simulation
Published: 10/11/2007
Authors: Chiara F Ferraris, Nicos Martys, M R Geiker, N V. Muzzatti
Abstract: The flow in traditional rotational rheometers is well known and rheological parameters such as viscosity can be calculated relatively easily. On the other hand, when the fluid is a suspension that contains particles with a diameter up to 2 mm, these ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860485



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