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You searched on: Author: chiara ferraris

Displaying records 21 to 30 of 88 records.
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21. New approach to calibrate the mortar flow table
Published: 1/27/2011
Authors: Chiara F Ferraris, Haleh Azari
Abstract: The flow table is a standardized test that is widely used to qualify a mortar to be tested for compressive strength and air content. It is also the only standard test to quantify a mortar workability property. Therefore, the calibration of this devic ...

22. 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 ...

23. 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 ...

24. 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 ...

25. 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

26. 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 ...

27. 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 ...

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 ...

29. 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 ...

30. 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 ...

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