Dr. Garboczi joined the Inorganic Building Materials Group of the Building Materials Division in October 1988. Dr. Garboczi is working on the relationships between microstructure and transport properties in cement- based materials using realistic computer-based microstructural models and exact transport algorithms. Electrical and diffusion properties have been studied and found to be in quantitative agreement with experimental results. Fluid permeability and linear elastic properties are currently being investigated. Percolation and composite theory are also heavily used to understand the pore-space-dependent properties of cement-based materials. Dr. Garboczi performs research within the Center for Advanced Cement-Based Materials (ACBM), which is headquartered at Northwestern University. ACBM is a consortium of Northwestern University, the University of Illinois at Champaign-Urbana, Purdue University, the University of Michigan, and NIST. Dr. Garboczi is also a principal investigator with the Virtual Cement and Concrete Testing Laboratory consortium, in collaboration with the eight companies and trade associations that are members of the consortium.

Prior to coming to NIST, Dr. Garboczi was a research physicist at the Armstrong World Industries, Inc. Research and Development Division.

Dr. Garboczi is a member of the American Physical Society, a fellow of the American Ceramic Society, a member of the Materials Research Society, and a member of the American Concrete Institute. He has received the Robert L'Hermite Medal from RILEM (International Union of Testing and Research Laboratories for Materials and Structures) (1992), and the 1992 BFRL Communicator Award.

Erdogan, S.T., Quiroga, P.N. Fowler, D.W., Saleh, H.A., Livingston, R.A., Garboczi, E.J., Ketcham, P.M., Hagedorn, J.G., and Satterfield, S.G., Three-dimensional shape analysis of coarse aggregates: Methodology and prelimary results on several different coarse aggregates and reference rocks," submitted to Cement and Concrete Research (2005).

Garboczi, E.J., Bullard, J.W., and Bentz, D.P., "Virtual Testing of Cement and Concrete−USA 2004," Concrete International 26 (12), pp. 33-37 (2004).

Garboczi, E.J. and Bullard, J.W., "Shape analysis of a reference cement," Cement and Concrete Research, 34 (10), pp. 1933-1937 (2004).

Feng, X., Garboczi, E.J., Bentz, D.P., Stutzman, P.E., and Mason, T.O., "Estimation of the degree of hydration of blended cement pastes by a scanning electron microscope point-counting procedure," Cement and Concrete Research, 34 (10), pp. 1787-1793 (2004).

Bullard, J.W., Ferraris, C., Garboczi, E.J., Martys, N. and Stutzman, P., "Virutal Cement", Chapter 10.3, Innovations in Portland Cement Manufacturing, pp. 1311-1331, J.I. Bhatty, F.M. Miller and S.H. Kosmatka, eds., Portland Cement Association (2004). (PDF Version)

Bohn, R.B. and Garboczi, E.J., "User Manual for Finite Element Difference Programs: A Parallel Version of NISTIR 6269," National Institute of Standards and Technology Internal Report 6997, (2003). (PDF Version)

Arns, C.H., Knackstedt, M.A., Pinczewski, W.V. and Garboczi, E.J., "Computation of linear elastic properties from microtomographic images: Methodology and agreement between theory and experiment," Geophysics 67 (5), 1396-1405 (2002). (PDF Version)

Campo, M.A., Woo, L.Y., Mason, T.O. and Garboczi, E.J., "Frequency-Dependent Electrical Mixing Law Behavior in Spherical Particle Composites," Journal of Electroceramics, 9 (1), 49-56 (2002). (PDF Version)

Chong, K.P. and Garboczi, E.J., "Smart and Designer Structural Material Systems," International Journal of Progress in Structural Engineering and Materials, 4 (4), 417-430 (2002). (PDF Version)

Garboczi, E.J., "Three-dimensional mathematical analysis of particle shape using X-ray tomography and spherical harmonics: Application to aggregates used in concrete," Cement and Concrete Research 32 (10), 1621-1638, October (2002). (PDF Version)

Kidner, N.J., Ingram, B.J., Homrighaus, Z.J., Mason, T.O. and Garboczi, E.J., "Impedance/Dielectric Spectroscopy of Electroceramics in the Nanograin Regime," Solid-State Ionics. Proceedings. Volume 756. Materials Research Society 2002 Fall Meeting, Boston, MA, EE4.6.1-12 (2002). (PDF Version)

Roberts, A.P. and Garboczi, E.J., "Elastic properties of model random three-dimensional open-cell solids," J. Mech. Phys. of Solids, 50 (1), 33-55, (2002). (PDF Version)

Roberts, A.P. and Garboczi, E.J., "Computation of the linear elastic properties of random porous materials with a wide variety of microstructure," Proc. Royal Soc. of London, 458 (2021), 1033-1054, (2002). (PDF Version)

Bentz, D.P. and Garboczi, E.J., "Multi-Scale Microstructural Modeling to Predict Chloride Ion Diffusivity for High Performance Concrete," Proceedings. Materials Science of Concrete Special Volume: Ion and Mass Transport in Cement-Based Materials, Toronto, Canada, October 4-5, 1999, 253-267 (2001). (PDF Version)

Hixson, A.D., Woo, L.Y., Campo, M.A. Mason, T.O., and Garboczi, E.J., "Intrinsic conductivity of short conductive fibers in composites by impedance spectroscopy," Journal of Electroceramics, 7 (3), 189-195, (2001). (PDF Version)

Mansfield, M.L., Douglas, J.F. and Garboczi, E.J., "Intrinsic viscosity and the electrical polarizability of arbitrarily shaped objects," Physical Review E 64 (6), 61401-61416, (2001). (PDF Version)

Garboczi, E.J. and Bentz, D.P., The effect of statistical fluctuation, finite size error, and digital resolution on the phase percolation and transport properties of the NIST cement hydration model, Cement and Concrete Research, 31, No. 10, 1501-1514, (2001). (PDF Version)

Bentz, D.P., Ehlen, M.A., Ferraris, C.F., and Garboczi, E.J., "Sorptivity-Based Service Life Predictions for Concrete Pavements," Proceedings. 7th International Conference on Concrete Pavements, Orlando, Florida, September 9-13, 2001, pp 181-193 (2001). (PDF Version)

Peled, A., Torrents, J.M., Mason, T.O., Shah, S.P. and Garboczi, E.J., "Electrical impedance spectra to monitor damage during tensile loading of cement composites,", ACI Materials J., 98, No. 4, 313-322 (2001). (PDF Version)

Stutzman, P.E., Bright, D.S., Garboczi, E.J., Finite Element Stress Computations Applied to Images of Damaged Concrete: A Possible New Diagnostic Tool for Concrete Petrography," Proceedings of the Twenty-Third International Conference on Cement Microscopy, April 29-May 4, 2001, Albuquerque, New Mexico, 2001. (PDF Version)

Roberts, A.P., and Garboczi, E.J., "Elastic moduli of model random three-dimensional closed-cell cellular solids," Acta Materiala, 49, No. 2, 189-197, (2001). (PDF Version)

Garboczi, E.J. and Berryman, J.G., "Elastic moduli of a material containing composite inclusions: Effective medium theory and finite element computations," Mechanics of Materials, 33, No. 8, 455-470 (2001). (PDF Version)

Meille, S. and Garboczi, E.J., "Linear elastic properties of 2-D and 3-D models of porous materials made from elongated objects," Mod. Sim. Mater. Sci. and Eng. 9 (5), 371-390 (2001). (PDF Version)

Torrents, J.M., Mason, T.O., Peled, A., Shah, S.P., and Garboczi, E.J., "Analysis of the impedance spectra of short conductive fiber composites," J. Mater. Sci. 36 (16), 4003-4012 (2001). (PDF Version)

Neubauer, C.M., Garboczi, E.J., Jennings, H.M. "The use of digital images to determine deformation throughout a microstructure. Part I. Deformation mapping technique," Journal of Materials Science, 35, pp 5741-5749 (2000). (PDF Version)

Snyder, K.A., Ferraris, C., Martys, N.S. and Garboczi, E.J., "Using impedance spectroscopy to assess the viability of the rapid chloride test for determining concrete conductivity," J. NIST Research, Vol. 105, No. 4, July-August, (2000). (PDF Version)

Roberts, A.P. and Garboczi, E.J., "Elastic properties of model porous ceramics," J. Amer. Ceram. Soc., 83, No. 12, 3041-3048 (2000). (PDF Version)

Garboczi, E.J., Bentz, D.P. and Frohnsdorff, G.J., "The past, present, and future of the computational materials science of concrete," in proceedings of J.F. Young symposium (2000). (PDF Version)

Garboczi, E.J., Bentz, D.P. and Frohnsdorff, G.J., "Knowledge-Based Systems and Computational Tools for Concrete," Concrete International, Vol. 22, No. 12, 24-27, (2000). (PDF Version)

Roberts, A.P. and E.J. Garboczi, E.J., "Modeling the microstructure and elastic properties of complex materials," in proceedings of the MSM 2000 Conference on Modeling and Simulation of Microsystems,, San Diego, CA, March 27-29 (2000). (PDF Version)

Bentz, D.P., Quenard, D.A., Kunzel, H.M., Baruchel, J., Peyrin, F., Salomoe, M., Martys, N.S. and Garboczi, E.J., "Microstructure and transport properties of porous building materials. II: Three-dimensional X-ray tomographic studies," Materials and Structures 33, 147-153 (2000). (PDF Version)

Berryman, J. and Garboczi, E.J., "New effective medium theory for the diffusivity or conductivity of a concrete microstructure model," Concrete Science and Engineering 2, 88-96 (2000). (PDF Version)

Ferraris, C., Garboczi, E.J., Stutzman, P., Winpigler, J. and Clifton, J., "Influence of silica fume on the stresses generated by ASR," ASTM Cement and Aggregates 22, 73-80 (2000). (PDF Version)

Shane, J.D., Mason, T.O., Jennings, H.M., Garboczi, E.J. and Bentz, D.P., "Effect of the interfacial transition zone on the conductivity of portland cement mortars," Journal of the American Ceramic Society 83, 1137-1144 (2000). (PDF Version)

Torrents, J.M., Mason, T.O. and Garboczi, E.J., "Impedance spectra of fiber-reinforced cement-based composites: A modelling approach," Cem. Conc. Res. 30, 585-592 (2000). (PDF Version)

Bentz, D.P. and Garboczi, E.J., "Multi-scale microstructural modeling to predict chloride ion diffusivity for high performance concrete," Materials Science of Concrete Special Volume: Ion and Mass Transport in Cement-Based Materials. Proceedings. American Ceramic Society, October 4-5, 1999, Toronto, Canada, 253-267 (2001). (PDF Version)

Garboczi, E.J. and D.P. Bentz, D.P., "Computer Modelling of Interfacial Transition Zone Microstructure and Properties," Engineering and Transport Properties of the Interfacial Transition Zone in Cementitious Composites, RILEM ETC report, 349-385 (1999). (PDF Version)

Garboczi, E.J., and Bentz, D.P., "Computer simulation and percolation theory applied to concrete," Annual Reviews of Computational Physics 1999, edited by D. Stauffer (World Scientific, Singapore, 1999). (PDF Version)

Garboczi, E.J., Bentz, D.P., Martys, N.S., "Digital Images and Computer Modelling," Experimental Methods for Porous Media, edited by P-Z Wong, Academic Press (1999) (PDF Version)

Bentz, D.P., Garboczi, E.J., Haecker, C.J. and Jensen, O.M., "Effects of cement particle size distribution on performance properties of portland cement-based materials," Cement and Concrete Research 29, 1663-1671 (1999). (PDF Version)

Garboczi, E.J. and Bentz, D.P. "Percolation aspects of cement paste and concrete: Properties and durability, in High-Performance Concrete: Research to Practice, American Concrete Institute Special Publication 189, edited by D.A. Lange, pp. 147-164 (1999). (PDF Version)

Roberts, A.P. and Garboczi, E.J., "Elastic properties of a tungsten-silver composite by reconstruction and computation," J. Mech. and Phys. of Solids 47, 2029-2055 (1999). (PDF Version)

Bentz, D.P., Garboczi, E.J. and Lagergren, E.S., "Multi-scale microstructural modelling of concrete diffusivity: Identification of significant variables," ASTM Cement and Aggregates 20, 129-139 (1998). (PDF Version)

Bentz, D.P., Garboczi, E.J. and Quenard, D.A., "Modelling drying shrinkage in reconstructed porous materials: Application to porous Vycor glass," Mod. and Sim. in Mater. Sci. and Eng. 6, 211-236 (1998). (PDF Version)

Bullard, J.W., Garboczi, E.J. and Carter, W.C., "Interplay of capillary and elastic driving forces during microstructural evolution: Applications of a digital image model," Journal of Applied Physics 83, 4477-486 (1998). (PDF Version)

Garboczi, E.J., "The use of computer simulations to interpret and understand electrical measurements," in Electrically Based Microstructural Characterization II, edited by R.A. Gerhardt, M.A. Alim, and S.R. Taylor (Materials Research Society, Pittsburgh, 1998), pp. 291-302. (PDF Version)

Garboczi, E.J. and Bentz, D.P. "Diffusivity-porosity relation for cement paste," in Materials Science of Concrete-Sulfate Attack Mechanisms, edited by J. Skalny (American Ceramic Society, Westerville, Ohio, 1999). (PDF Version)

Garboczi, E.J. and Bentz, D.P., "Multi-scale analytical/numerical theory of the diffusivity of concrete," Adv. Cem. Based Mater. 8, 77-88 (1998). (PDF Version)

Garboczi, E.J. and Bentz, D.P., "The microstructure of cement-based materials: Computer simulation and percolation theory," in Computational and Mathematical Models of Microstructural Evolution, edited by J.W. Bullard, L.-Q. Chen, R.K. Kalia, and A.M. Stoneham (Materials Research Society, Pittsburgh, 1998), pp. 89-100. (PDF Version)

Bentz, D.P., Detwiler, R.J., Garboczi, E.J., Halamickova, P. and Schwartz, L.M., "Multi-scale modelling of the diffusivity of mortar and concrete," Chloride Penetration into Concrete, edited by L.O. Nilsson and J.P. Ollivier (RILEM Publications, France,1997).

Ferraris, C.F., Clifton, J.R., Garboczi, E.J. and Davis, F.L., "Stress measurements due to alkali-silica reaction in mortars," in Mechanisms of Chemical Degradation of Cement-Based Systems, edited by K.L. Scrivener and J.F. Young (E & FN Spon, London, 1997), pp. 75-82. (PDF Version)

Ferraris, C., Clifton, J., Stutzman, P. and Garboczi, E.J., "Mechanistic studies on sulfate attack of cement-based materials", in Mechanisms of Chemical Degradation of Cement-Based Systems, edited by K.L. Scrivener and J.F. Young (E & FN Spon, London, 1997), pp. 185-192.

Ferraris, C.F., Garboczi, E.J., "Effect of stress relaxation, self-dessication, and water absorption on alkali-silica reaction in low water:cement ratio mortars," Cement and Concrete Research 27, 1553-1560 (1997). (PDF Version)

Garboczi, E.J., "Stress, displacement, and expansive cracking around a single spherical aggregate under different expansive conditions," Cement and Concrete Research 27, 495-500 (1997). (PDF Version)

Garboczi, E.J. and Bentz, D.P., "Analytical formulas for interfacial transition zone properties", Advanced Cement-Based Materials 6, 99-108 (1997). (PDF Version)

Garboczi, E.J. and Bentz, D.P.,"Computational Materials Science of Concrete on the Internet," Concrete International, December, 1997, pp. 26-27. (PDF Version)

Hsieh, G., Mason, T.O., Garboczi, E.J. and Pederson, L.R., "Experimental limitations in impedance spectroscopy: Part III--Effect of reference electrode position", Solid State Ionics 96, 153-172 (1997). (PDF Version)

Hwang, Jin-Ha, Mason, T.O. and Garboczi, E.J., "Electrical/dielectric properties of nanocrystalline cerium oxide," in Nanophase and Nanocomposite Materials II, Vol. 457 (Materials Research Society, Pittsburgh, 1997).

Hwang, J.J., Kirkpatrick, K.S., Mason, T.O. and Garboczi, E.J., "Experimental limitations in impedance spectroscopy: Part IV. Electrode contact effects." Solid State Ionics 98, 93-104 (1997). (PDF Version)

Neubauer, C.M., Bergstrom, T.B., Sujata, K., Xi, Y., Garboczi, E.J. and Jennings, H.M., "Drying shrinkage of cement paste as measured in an ESEM and comparison to microstructural models," Journal of Materials Science 32, 6415-6427 (1997).

Neubauer, C.M., Jennings, H.M. and Garboczi, E.J., "Mapping drying shrinkage deformations in cement-based materials," Cement and Concrete Research 27, 1603-1612 (1997). (PDF Version)

Schlangen, E. and Garboczi, E.J., "Fracture simulations of concrete using lattice models: Computational aspects", Engineering Fracture Mechanics 57, 319-332 (1997) (PDF Version)

Shane, J.D., Hwang, J-H., Sohn, D., Mason, T.O., Jennings, H.M. and Garboczi, E.J., "Recent developments in the measurement of transport properties in cement-based materials," in Mechanisms of Chemical Degradation of Cement-Based Systems, edited by K.L. Scrivener and J.F. Young (E and FN Spon, London, 1997), pp. 413-423. (PDF Version)

Bentz, D.P. and Garboczi, E.J., "Multi-scale models of the diffusivity of concrete," in Materials for the New Millenium, edited by K.P. Chong (ASCE, New York, 1996), pp. 574-582.

Bentz, D.P. and Garboczi, E.J., "Digital-image-based computer modeling and visualization of cement-based materials," in Proceedings of Transportation R/esearch Board (1996). (PDF Version)

Bentz, D.P., Garboczi, E.J. and Martys, N.S., "Application of digital-image-based models to microstructure, transport properties, and degradation of cement-based materials," in The Modelling of Microstructure and Its Potential for Studying Transport Properties and Durability, edited by H.M. Jennings, 1996. (PDF Version)

Bullard, J.W. and Garboczi, E.J., "Comment on: A Lattice Model for Solid-State Sintering: Simple Particle Arrays," Comp. Mater. Sci. 6, 350-352 (1996).

Garboczi, E.J. and Bentz, D.P., "Modelling of the Microstructure and Transport Properties of Concrete," Construction and Building Materials 10 (5), 293-300 (1996). (PDF Version)

Garboczi, E.J. and Bentz, D.P., "The effect of the interfacial transition zone on concrete properties: The dilute limit," in Materials for the New Millenium, edited by K.P. Chong (ASCE, New York, 1996), pp. 1228-1237.

Garboczi, E.J. and Douglas, J.F., "Intrinsic conductivity of objects having arbitrary shape and conductivity," Physical Review E 53, 6169-6180 (1996). (PDF Version)

Neubauer, C.M., Jennings, H.M. and Garboczi, E.J., "A three-phase model of the elastic and shrinkage properties of mortar," Journal of Advanced Cement-Based Materials 4, 6-20 (1996). (PDF Version)

Schlangen, E. and Garboczi, E.J., "New method for simulating fracture using a random geometry lattice," International Journal of Engineering Science 34, 1131-1144 (1996).

Bentz, D.P., Hwang, J.T.G., Hagwood, C., Garboczi, E.J., Snyder, K.A., Buenfeld, N. and Scrivener, K.L., "Interfacial zone percolation in concrete: Effects of interfacial thickness and aggregate shape," in Microstructure of Cement-Based Systems/Bonding and Interfaces in Cementitious Materials, edited by S. Diamond et. al., (Materials Research Society Vol. 370, Pittsburgh, 1995), pp. 437-442. (PDF Version)

Bentz, D.P., Martys, N.S., Stutzman, P., Levenson, M.S., Garboczi, E.J., Dunsmuir, J. and Schwartz, L.M., "X-ray microtomography of an ASTM C109 mortar exposed to sulfate attack," in Microstructure of Cement-Based Systems/Bonding and Interfaces in Cementitious Materials, edited by S. Diamond et. al., (Materials Research Society Vol. 370, Pittsburgh, 1995), pp. 77-82. (PDF Version)

Bentz, D.P., Quenard, D.A., Baroghel-Bouny, V., Garboczi, E.J. and Jennings, H.M., " Modelling Drying Shrinkage of Cement Paste and Mortar: Part I. Structural Models from Nanometers to Millimeters," Materials and Structures 28, 450-458 (1995). (PDF Version)

Bentz, D.P., Schlangen, E. and Garboczi, E.J., "Computer Simulation of Interfacial Zone Microstructure and Its Effect on the Properties of Cement-Based Materials," in Materials Science of Concrete IV, edited by Jan Skalny and Sidney Mindess (American Ceramic Society, Westerville, Ohio, 1995). (PDF Version)

Bullard, J.W., Garboczi, E.J., Carter, W.C. and Fuller, E.R., "Numerical methods for computing interfacial mean curvature," Computational Materials Science 4, 103-116 (1995). (PDF Version)

Coverdale, R.T., Christensen, B.J., Mason, T.O., Jennings, H.M., Garboczi, E.J. and Bentz, D.P., "Interpretation of the Impedance Spectroscopy of Cement Paste via Computer Modelling I: Bulk Conductivity and Offset Resistance", Journal of Materials Science 30, 712-719 (1995). (PDF Version)

Coverdale, R.T., Garboczi, E.J. and Jennings, H.M., "An Improved Model for Simulating Impedance Spectroscopy," Computational Materials Science 3, 465-474 (1995). (PDF Version)

Douglas, J.F. and Garboczi, E.J., "Intrinsic viscosity and polarizability of particles having a wide range of shapes," Advances in Chemical Physics 91, 85-153 (1995). (PDF Version)

Ford, S.J., Mason, T.O., Christensen, B.J., Coverdale, R.T., Jennings, H.M. and Garboczi, E.J., "Electrode configurations and impedance spectra of cement pastes," Journal of Materials Science 30, 1217-1224 (1995). (PDF Version)

Garboczi, E.J.,"Microstructure and Transport Properties of Concrete," in Performance Criteria for Concrete Durability, RILEM Report No. 12, edited by J. Kropp and H.K. Hilsdorf (E. and F.N. Spon, London, 1995). (PDF Version)

Garboczi, E.J., and Bentz, D.P., "Microstructure-Property Relationships in Concrete: From Nanometers to Centimeters," 2nd CANMET/ACI International Symposium on "Advances in Concrete Technology", Las Vegas, Nevada, June 11-14, 1995. (PDF Version)

Garboczi, E.J., Bentz, D.P. and Schwartz, L.M., "Modelling the influence of the interfacial zone on the D.C. electrical conductivity of mortar," Advanced Cement-Based Materials 2, 169-181 (1995). (PDF Version)

Garboczi, E.J. and Day, A.R., "An algorithm for computing the effective linear elastic properties of heterogeneous materials: 3-D results for composites with equal phase Poisson ratios," Journal of Physics and Mechanics of Solids 43, 1349-1362 (1995). (PDF Version)

Garboczi, E.J., Schwartz, L.M. and Bentz, D.P., "Modelling the D.C. electrical conductivity of mortar," in Microstructure of Cement-Based Systems/Bonding and Interfaces in Cementitious Materials, edited by S. Diamond et. al., (Materials Research Society Vol. 370, Pittsburgh, 1995), pp. 429-436. (PDF Version)

Garboczi, E.J., Snyder, K.A., Douglas, J.F. and Thorpe, M.F., "Geometrical percolation threshold of overlapping ellipsoids," Physical Review E 52, 819-828 (1995). (PDF Version)

Halamickova, P., Detwiler, R.J., Bentz, D.P. and Garboczi, E.J., "Water permeability and chloride ion diffusion in portland cement mortars: Relationship to sand content and critical pore diameter," Cement and Concrete Research 25, 790-802 (1995). (PDF Version)

Olson, R.A., Christensen, B.J., Coverdale, R.T., Ford, S.J., Moss, G.M., Jennings, H.M.,Mason, T.O. and Garboczi, E.J., "Interpretation of the Impedance Spectroscopy of Cement Paste via Computer Modelling III: Microstructural analysis of frozen cement paste," Journal of Materials Science 30, 5078-5086 (1995). (PDF Version)

Schwartz, L.M., Garboczi, E.J. and Bentz, D.P., "Interfacial transport in porous media: Application to D.C. electrical conductivity of mortars," Journal of Applied Physics 78, 5898-5908 (1995). (PDF Version)