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You searched on: Author: nicos martys

Displaying records 11 to 20 of 82 records.
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11. Modeling of the Influence of Transverse Cracking on Chloride Penetration into Concrete
Published: 4/23/2013
Authors: Dale P Bentz, Edward Joseph Garboczi, Yang Lu, Nicos Martys, Aaron Richard Sakulich, William Jason Weiss
Abstract: Concrete service life models have proliferated in recent years due to increased interest in designing infrastructure elements with at least a 75-year service life, along with greater emphasis on life cycle costing in general. While current models con ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911669

12. Measurement Science Needs for the Expanded Use of Green Concrete: Workshop Summary Report
Series: Technical Note (NIST TN)
Report Number: 1783
Published: 2/6/2013
Authors: Kenneth Alan Snyder, Dale P Bentz, Jeffrey W Bullard, Chiara F Ferraris, Nicos Martys, Paul E Stutzman
Abstract: In July 2012, NIST conducted the Green Concrete Workshop to bring together stakeholders from the concrete construction industry and identify critical needs for the expanded use of industrial by- product materials, such as fly ash and slag, in conc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913076

13. Concrete rheometers
Published: 5/1/2012
Authors: Chiara F Ferraris, Nicos Martys
Abstract: The scope of this chapter is to introduce the current technology for measuring the rheological properties of concrete. The need to evaluate or assess the flow properties of concrete has resulted in the invention or design and standardization of hundr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907955

14. Stress propagation in a colloidal suspension under shear
Published: 3/1/2012
Authors: William L George, Pascal Hebraud, Didier Lootens, Mouhamad Khalil, Nicos Martys
Abstract: The stress propagation in a concentrated attractive colloidal suspension, under shear, is studied using mumerical simulations. A novel way of describing the intercolloidal stress field is proposed and its spatial correlations are studied. An inertia ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906616

15. Measurement Science Roadmap for Workability of Cementitious Materials: Workshop Summary Report
Series: Technical Note (NIST TN)
Report Number: 1704
Published: 8/15/2011
Authors: Chiara F Ferraris, Nicos Martys
Abstract: This report summarizes the results of the workshop ,Measurement Science Roadmap for Workability of Cementitious MaterialsŠ held on March 18, 2011 in Gaithersburg Maryland and sponsored by the National Institute of Standards and Technology with collab ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908815

16. Advancing the materials science of concrete with supercomputers
Published: 1/24/2011
Authors: Jeffrey W Bullard, Edward Joseph Garboczi, William L George, Nicos Martys, Steven G Satterfield, Judith Ellen Terrill
Abstract: Supercomputers are renowned for being used on grand challenge problems like global weather patterns, nuclear device virtual testing, galaxy formation, unraveling molecular structure ‹ and now concrete! Why do the mysteries of concrete form this kind ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905147

17. A Smoothed Particle Hydrodynamics Based Fluid Model with a Spatially Dependent Viscosity: Application to flow of a suspension with a non-Newtonian fluid matrix
Published: 10/1/2010
Authors: Nicos Martys, William L George, Byong-Wa Chun, Didier Lootens
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903650

18. 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

19. Virtual Testing of Concrete Transport Properties
Published: 10/1/2009
Authors: Dale P Bentz, Edward Joseph Garboczi, Nicos Martys, Kenneth Alan Snyder, W. S. Guthrie, Konstantinos Kyritsis, Narayanan Neithalath
Abstract: The transport properties of concrete are critical to its field performance. Commonly encountered degradation mechanisms are dependent on ionic diffusivity, sorptivity, and permeability. In this paper, virtual testing of two of these concrete transp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861651

20. Contact and Stress Anisotropies in Start Up Flows of Collodial Suspensions
Published: 9/11/2009
Authors: Nicos Martys, William L George, Didier Lootens, Pascal Hebraud
Abstract: Spatio-temporal correlations in start-up flows of attractive colloids are explored by numerical simulations. The suspension is first allowed to flocculate during a time tw, then the stress necessary to induce its flow is computed. Whereas at low vol ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861576



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