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Author: jeffrey davis
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Displaying records 1 to 10 of 11 records.
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1. Influence of Internal Curing and Viscosity Modifiers on Resistance to Sulfate Attack
Published: 4/1/2014
Authors: Dale P Bentz, Jeffrey M. Davis, Max A Peltz, Kenneth Alan Snyder
Abstract: Sulfate attack is one of the common degradation mechanisms for concrete in severe environments. While various strategies for minimizing sulfate attack are well recognized, including using an ASTM C150 Type V cement and/or reducing water-to-cementitio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913264

2. Modeling Chloride transport in Cracked Concrete: A 3-D image-based microstructure simulation
Published: 10/3/2012
Authors: Edward Joseph Garboczi, Dale P Bentz, Jeffrey M. Davis, Yang Lu
Abstract: The prediction of the service life of concrete materials is difficult, mainly because of their complex heterogeneous microstructure and their random nature. Studying the presence of cracks in concrete and their effect on chloride transport and reacti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912153

3. Using Viscosity Modifiers to Reduce Effective Diffusivity in Mortars
Published: 8/1/2012
Authors: Kenneth Alan Snyder, Dale P Bentz, Jeffrey M. Davis
Abstract: Three viscosity modifiers (a commercial shrinkage-reducing admixture, a polypropylene glycol, and cellulose ether) are used to reduce the effective diffusivity of chloride ions through mortars during a one-year exposure. Two delivery mechanisms ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908267

4. Detection and Speciation of Brominated Flame Retardants in Consumer Products and Household Dust
Published: 3/27/2012
Authors: Richard D Holbrook, Jeffrey M. Davis, Keana C K Scott, Christopher W Szakal
Abstract: The ubiquitous presence of brominated flame retardants in humans, biota, and the environment has caused concerns about their toxicity, transformations, and persistence. Polymeric materials, which often are intercalated with include brominated flame ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905365

5. Pilot Estuarine Mesocosm Study on the Environmental Fate of Silver Nanomaterials Leached from Consumer Products
Published: 1/10/2012
Authors: Danielle Cleveland, Stephen E Long, Paul L. Pennington, Emily Cooper, Michael H. Fulton, Geoffrey I. Scott, Elijah J Petersen, Timothy M Brewer, Jeffrey M. Davis, Laura J Wood
Abstract: Although nanosilver consumer products (CPs) now enjoy widespread availability, little work has been done to determine the environmental fate and leaching of silver nanoparticles (AgNPs) from these products. This type of work is crucial, since the lif ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906343

6. Bridging the Micro to Macro Gap: A New Application for Milli-probe X-ray Fluorescence
Published: 6/1/2011
Authors: Jeffrey M. Davis, Dale E Newbury, Nicholas W m Ritchie, Edward P. Vicenzi, Dale P Bentz, Albert J. Fahey
Abstract: X-ray elemental mapping and x-ray spectrum imaging are powerful microanalytical tools. However, their scope is limited spatially by the raster area of a scanning electron microscope or microprobe. Limited sampling size becomes a significant issue w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904216

7. An Examination of Kernite (Na2B4O6(OH)2 , 3 H2O) Using X-ray and Electron Spectroscopies: Quantitative Microanalysis of a Hydrated Low-Z Mineral
Published: 4/14/2011
Authors: Douglas C Meier, Jeffrey M. Davis, Edward P. Vicenzi
Abstract: Mineral borates, the primary industrial source of boron, are found in a large variety of compositions. One such source, kernite (Na2B4O6(OH)2 , 3 H2O), offers a panoply of challenges for traditional electron-probe microanalysis (EPMA) ‹ it is hygrosc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907147

8. Fluorinated Copolymer Nanoparticles for Multimodal Imaging Applications
Published: 2/18/2010
Authors: Mark M. Bailey, Christine M. Mahoney, Elodie Dempah, Jeffrey M. Davis, Matthew Becker, Supang Khondee, Eric J. Munson, Cory J. Berkland
Abstract: Nanomaterials have emerged as valuable tools in biomedical imaging techniques, such as magnetic resonance imaging (MRI), fluorescence, positron emission tomography (PET), and others. Some have been designed to serve as multimodal imaging agents, com ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902813

9. VERDiCT: Viscosity Enhancers Reducing Diffusion in Concrete Technology
Published: 1/1/2009
Authors: Dale P Bentz, Max A Peltz, Kenneth Alan Snyder, Jeffrey M. Davis
Abstract: Our nation's infrastructure and long term containment of nuclear waste are two critical applications requiring concrete with an increased service life. In this paper, a new paradigm for increasing concrete service life is presented. Since diffusion ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861562

10. Damage Development in Cementitious Materials Exposed to MgCl2 Deicing Salt
Published: Date unknown
Authors: Yaghoob Farnam, Andrew Wiese, Dale P Bentz, Jeffrey M. Davis, Jason Weiss
Abstract: MgCl2 is used in deicing applications due to its capability to depress freezing temperatures to a lower point than other salts like NaCl. The constituents of concrete (i.e., pores solution, calcium hydroxide, aluminate phases, and calcium silicat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917186



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