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You searched on: Author: chiara ferraris

Displaying records 21 to 30 of 90 records.
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21. Summer Undergraduate Research Fellowships (SURF) at the National Institute of Standards and Technology
Published: 3/15/2011
Authors: Joseph J Kopanski, Richard L Steiner, Lisa Jean Fronczek, Christopher C White, Chiara F Ferraris
Abstract: We recruit students from underrepresented groups and at Colleges and Universities with limited on-campus opportunities for research experience. We strive to provide the highest quality and challenging undergraduate research experience by involving st ...

22. Optimization of Particle Sizes in High Volume Fly Ash Blended Cements
Series: NIST Interagency/Internal Report (NISTIR)
Published: 2/2/2011
Authors: Dale P Bentz, Chiara F Ferraris, James J Filliben
Abstract: One major objective of the sustainable construction movement is to decrease the energy and carbon dioxide footprints of concrete. Since the production of portland cement is a major contributor in both of these areas, concretes with increasing quanti ...

23. 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 ...

24. 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 ...

25. 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 ...

26. 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 ...

27. 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

28. 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 ...

29. 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 ...

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  • SP 250-XX: Calibration Services
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