U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Edward Garboczi (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 126 - 150 of 208

Shape comparison between 0.4 ym to 2.0 ym and 20 ym to 60 ym cement particles

June 15, 2010
Author(s)
L Holzer, R Flatt, S.T. Erodgan, Jeffrey W. Bullard, Edward Garboczi
Portland cement powder has a wide particle size distribution, from approximately 0.1 υm to 60 υm. This wide powder size distribution arises via the grinding of much larger clinker particles in fact, several percent of the world s energy expenditures are

Virtual Testing of Concrete Transport Properties

October 1, 2009
Author(s)
Dale P. Bentz, Edward J. Garboczi, Nicos Martys, Kenneth A. Snyder, W. S. Guthrie, Konstantinos Kyritsis, Narayanan Neithalath
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 transport

Virtual Cement and Concrete

September 1, 2009
Author(s)
Jeffrey W. Bullard, Chiara C. Ferraris, Edward Garboczi, Nicos Martys, Paul E. Stutzman, Judith E. Terrill
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 understood

Capillary Rise between Planar Surfaces

January 14, 2009
Author(s)
Jeffrey W. Bullard, Edward J. Garboczi
Minimization of free energy is used to calculate the equilibrium verticalrise and mensicus shape of a liquid column between two closelyspaced, parallel planar surfaces that are inert and immobile. States of minimum free energy are found using standard

Standards Development for Gas Phase Air Cleaning Equipment in Buildings

November 3, 2008
Author(s)
Andrew K. Persily, Cynthia H. Reed, Stephanie S. Watson, Nicos Martys, Edward J. Garboczi, Heather Davis
Concerns about building security have resulted in increasing interest in gas phase air cleaning (GPAC) and the need for standard methods to determine the effectiveness of these systems. Similarly, the ability to predict their installed performance, based

A Comparison of Viscosity-Concentration Relationships for Emulsions

November 1, 2008
Author(s)
Jeffrey W. Bullard, A T. Pauli, Edward J. Garboczi, Nicos Martys
Differential Effective Medium Theory (D-EMT) is applied to derive expressions for the viscosity of a colloidal suspension or an emulsion as a function of the volume fraction of the dispersed phase. The application of D-EMT to this problem depends on how

Cement and Concrete Materials Research at the National Institute of Standards and Technology (NIST)

September 5, 2007
Author(s)
Edward J. Garboczi, Dale P. Bentz, Jeffrey W. Bullard, Chiara F. Ferraris, Nicos Martys, Max A. Peltz, Sudalin Rodrigues, Paul E. Stutzman, Kenneth A. Snyder, John A. Winpigler
The materials science of cement and concrete is the focus of the Inorganic Materials Group at the National Institute of Standards and Technology (NIST). These experimental and computational research efforts include component and finished materials

Uncertainty Analysis for Virtual Cement Measurement

September 13, 2006
Author(s)
Blaza Toman, Adriana Hornikova, Robert C. Hagwood, Hung-Kung Liu, Nien F. Zhang, Edward J. Garboczi, Jeffrey W. Bullard
Virtual measurements are the outputs of well-defined mathematical models based on theoretical principles and simulation algorithms. The VCCTL (Virtual Cement and Concrete Testing Laboratory) is a software system built by the Material and Construction

Analysis of Sensitivity of VCCTL Measurements to Various Input Quantities

August 9, 2006
Author(s)
Adriana Hornikova, Blaza Toman, Nien F. Zhang, Hung-Kung Liu, Robert C. Hagwood, Edward J. Garboczi, Jeffrey W. Bullard
Virtual measurements are the outputs of well-defined mathematical models based on theoretical principles and simulation algorithms. The VCCTL (Virtual Cement and Concrete Testing Laboratory) is a software system built by the Material and Construction

A Hybrid Finite Element-Analytical Method For Determining the Intrinsic Elastic Moduli of Particles Having Moderately Extended Shapes and a Wide Rande of Elastic Properties

August 1, 2006
Author(s)
Edward J. Garboczi, Jack F. Douglas, Howard Hung
The presence of a low (dilute) concentration of paniculate inclusions having any shape and any property mismatch with the matrix in which they are placed, influences the elasticity of the resulting composite material. This influence is via the intrinsic

Virtual Testing of Cement and Concrete

May 10, 2006
Author(s)
Dale P. Bentz, Edward J. Garboczi, Jeffrey W. Bullard, Chiara F. Ferraris, Nicos Martys, Paul E. Stutzman
Concrete is a unique multi-phase, random, complex, and composite material that provides both strength and impermeability to engineered structures. Unlike most construction materials, the properties of concrete continue to develop over time and in place an

Using LADAR to characterize the 3-D shape of aggregates: Preliminary results

March 1, 2006
Author(s)
Edward J. Garboczi, Geraldine S. Cheok, William C. Stone
In previous publications, we have shown how using x-ray computed tomography to obtain the raw 3-D data for the coordinates of the surface, and then converting this raw data into an analytical function for the surface via an expansion in spherical harmonic