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Search Publications by: Paul E. Stutzman (Fed)

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Displaying 26 - 50 of 106

Quantitative Imaging of Clinker and Cement Microstructure

April 15, 2015
Author(s)
Paul E. Stutzman, Jeffrey W. Bullard, Pan Feng
The combination of scanning electron microscopy (SEM) with X-ray microanalysis and image processing provides a powerful ability to image and quantify microstructural features of con- struction materials. This document provides guidance for collecting

Multi-Scale Investigation of the Performance of Limestone in Concrete

December 1, 2014
Author(s)
Dale P. Bentz, Ahmad Ardani, Tim Barrett, Scott Z. Jones, Didier Lootens, Max A. Peltz, Taijiro Sato, Paul E. Stutzman, Jussara Tanesi, Jason Weiss
Limestone (calcium carbonate) has long been a critical component of concrete, whether as the primary raw material for cement production, a fine powder added to the binder component, or a source of fine and/or coarse aggregate. This paper focuses on the

Characterization of Metal Powders Used for Additive Manufacturing

September 16, 2014
Author(s)
John A. Slotwinski, Edward J. Garboczi, Paul E. Stutzman, Chiara F. Ferraris, Stephanie S. Watson, Max A. Peltz
Additive manufacturing (AM) techniques can produce complex, high-value metal parts, with potential applications as critical parts such as those found in aerospace components. The production of AM parts with consistent and predictable properties requires

Uncertainty in Bogue-Calculated Phase Composition of Hydraulic Cements

July 1, 2014
Author(s)
Paul E. Stutzman
The Bogue calculations of cement composition are used for manufacturing process control and cement classification. While it is commonly understood that the Bogue calculations are estimates with potential intrinsic biases, the magnitudes of such biases are

Corrosion Detection in Concrete Rebars Using a Spectroscopic Technique

January 11, 2014
Author(s)
Edward J. Garboczi, Paul E. Stutzman, Shuangzhen S. Wang, Nicos Martys, Dat Duthinh, Virgil Provenzano, Shin G. Chou, David F. Plusquellic, Jack T. Surek, Sung Kim, Robert D. McMichael, Mark D. Stiles, Ahmed M. Hassan
Detecting the early corrosion of steel in reinforced concrete is a goal that has been much pursued. Since 2010, NIST has been working on a large project to develop an electromagnetic (EM) probe that detects the actual corrosion products via spectroscopic

Measurement and Simulation of Millimeter Wave Scattering Cross-sections from Steel-Reinforced Concrete

January 11, 2014
Author(s)
Ahmed M. Hassan, Edward Garboczi, Robert McMichael, Jack T. Surek, Mark D. Stiles, David F. Plusquellic, Virgil Provenzano, Paul E. Stutzman, Shuangzhen S. Wang, Sung Kim, Michael D. Janezic, Jason Coder, Nicos Martys, David R. Novotny
Some iron oxide corrosion products exhibit antiferromagnetic magnetic resonances (AFMR) at around 100 GHz at normal temperatures. AFMR can be detected in laboratory conditions, which serves as the basis for a new non-destructive spectroscopic method for

Application of physical and chemical characterization techniques to metallic powders

August 28, 2013
Author(s)
Edward J. Garboczi, John A. Slotwinski, Max A. Peltz, Chiara F. Ferraris, Stephanie S. Watson, Paul E. Stutzman
Systematic studies have been done on two different powder materials used for additive manufacturing: stainless steel and cobalt-chrome. The characterization of these powders is important in NIST efforts to develop appropriate measurements and standards for

Physical and chemical characterization techniques for metallic powders

August 28, 2013
Author(s)
John A. Slotwinski, Paul E. Stutzman, Stephanie S. Watson, Edward J. Garboczi, Max A. Peltz, Chiara F. Ferraris
Systematic studies have been done on two different powder materials used for additive manufacturing: stainless steel and cobalt-chrome. An extensive array of characterization techniques were applied to these two powders. The physical techniques included

Hydrated Phases in Blended Cement Systems and Synthetic Saltstone Grouts

June 10, 2013
Author(s)
Kenneth A. Snyder, Paul E. Stutzman
A blended binder system (10 % portland cement, 45 % fly ash, and 45 % slag) is characterized as part of a broader study of its long-term effectiveness in stabilizing treated salt waste at the Savannah River Site. The binder system is reproduced in the

Assessment of the glassy phase reactivity in fly ashes used for geopolymer cements

June 1, 2013
Author(s)
Paul E. Stutzman, Katherine Aughenbaugh, Maria Juenger
Geopolymer cements have not found widespread use as a portland cement replacement, in part due to the difficulty in proportioning mixtures in a reliable manner. Unlike portland cements, which are mixed with water, geopolymer cements contain caustic

Development of a Reference Material for the Calibration of Cement Paste Rheometers

April 22, 2013
Author(s)
Chiara F. Ferraris, Paul E. Stutzman, Zhuguo Li, Min-Hong Zhang
Rheometers are usually calibrated using a standard reference oil. On the other hand the calibration of rheometer for paste or concrete cannot be calibrated using an oil as it is a Newtonian fluid, while the rheometers are designed to measure non-Newtonian

Measurement Science Needs for the Expanded Use of Green Concrete: Workshop Summary Report

February 6, 2013
Author(s)
Kenneth A. Snyder, Dale P. Bentz, Jeffrey W. Bullard, Chiara F. Ferraris, Nicos Martys, Paul E. Stutzman
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 concrete

An Argument for Virtual Testing in the Cement Plant

September 10, 2012
Author(s)
Pichet Sahachaiyunta, Kittisak Pongpaisanseree, Jeffrey W. Bullard, Paul E. Stutzman, Edward Garboczi, Wilasa Vichit-Vadakan
The cement industry is moving toward customized commodity products, requiring plants that were built to consistently produce thousands of tons of one product each day to now be versatile enough to fine-tune multiple products that meet both industry

Characterization of Surface Accumulation and Release of Nanosilica During Irradiation of Polymer Nanocomposites with Ultraviolet Light

August 12, 2012
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Savelas A. Rabb, Paul E. Stutzman, Justin M. Gorham, Xiaohong Gu, Lee L. Yu, Joannie W. Chin
Nanofillers are increasingly used for enhancing multiple properties of polymeric materials in many applications. However, polymers are susceptible to photodegradation by solar ultraviolet (UV) radiation Therefore, nanofillers in a polymer nanocomposite

Certification of SRM 2492: Bingham Paste Mixture for Rheological Measurements

June 7, 2012
Author(s)
Chiara F. Ferraris, Paul E. Stutzman, William F. Guthrie
Rheological measurements are often performed using a rotational rheometer. In this type of rheometer, the tested fluid is sheared between two surfaces, one of which is rotating [1]. Usually, the angular velocity is imposed and the response of the material

Influence of solvent washing on interlayer structure of alkylammonium montmorillonites

April 26, 2012
Author(s)
Wayne L. Elban, John A. Howarter, Mickey C. Richardson, Paul E. Stutzman, Aaron M. Forster, Adam J. Nolte, Gale A. Holmes
Powdered samples of montmorillonite were functionalized with ammonium surfactants of various chain lengths and subjected to two different constant volume washing procedures: water only or sequential ethanol-water. The organo-functionalized montmorillonite

Analysis of Early-Age Bridge Deck Cracking in Nevada and Wyoming

January 17, 2012
Author(s)
Dale P. Bentz, Paul E. Stutzman, Aaron R. Sakulich, William J. Weiss
In late 2009, the Echo Wash and Valley of Fire bridge decks were constructed in the Lake Mead National Recreation area in Nevada. Within six months, in early 2010, both decks exhibited considerable transverse cracking, with some cracks extending through