Jeffrey J. Thomas Curriculum Vitae

Northwestern University Department of Civil and Environmental Engineering 2145 Sheridan Rd. Evanston, IL 60208-3109 (847) 491-3453 jthomas@northwestern.edu

9435 Tripp Ave. Skokie, IL 60076 (847) 677-5295

EDUCATION

Northwestern University Evanston, Illinois Ph.D., Materials Science and Engineering, December 1994

Thesis title: “Formation of Reaction-bonded Silicon Nitride using Microwave Heating” Thesis Advisors: Prof. D. Lynn Johnson and Prof. Hamlin M. Jennings

Cornell University Ithaca, New York B.S., Applied and Engineering Physics, June 1989

WORK EXPERIENCE

2005 - present Research Associate Professor, Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois

2002 - 2005 Research Assistant Professor, Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois

1997 - 2001 Research Associate, Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois

1999 Visiting Scientist, National Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland

1994 – 1997 Post-Doctoral Fellow, Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois

1989 – 1994 Graduate Research Assistant, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois

TEACHING EXPERIENCE (Northwestern University)

CIV_ENG 216: Mechanics of Materials (Fall quarter, 2003 - 2006)

CIV_ENG 212: Mechanics (Fall quarter, 2007)

GEN_ENG 206-2: Honors Engineering Analysis II (Winter quarter, 2003-2007)

GEN_ENG 205-2: Engineering Analysis II (Winter quarter, 2002; Spring quarter 2003, 2007)

PROFESSIONAL MEMBERSHIPS

American Ceramic Society Materials Research Society American Concrete Institute

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CONSULTING EXPERIENCE • Since 1998, have performed a variety consulting services related to concrete deterioration

lawsuits, including expert scientific analysis of deposited material relating to concrete deterioration by chemical attack and drafting of pretrial declarations as an expert in the field of cement chemistry.

• From 2000 to 2002, and in 2007, conducted basic research and product and process development on aqueous silicate-based protective coatings for metals, in a consulting capacity for a startup company.

PRINCIPAL PUBLICATIONS SINCE 1998

“Measuring the Chemical and Physical Properties of the Nanoscale Building Blocks of Cement” (A.J. Allen, J.J. Thomas, H.M. Jennings) Research Highlights of the NIST Center for Neutron Research, Special Publication of the National Institute of Standards and Technology, edited by R.L. Cappelletti (in press, 2007). “A new approach to modeling the nucleation and growth kinetics of tricalcium silicate hydration” (J.J. Thomas) Journal of the American Ceramic Society 90 3282-3288 (2007). “Composition and density of nanoscale calcium-silicate-hydrate in cement” (A.J. Allen, J.J. Thomas, H.M. Jennings) Nature Materials 6 [4], pp. 311-316 (2007). “Analysis of cement paste and C-S-H gel by small-angle neutron scattering” (A.J. Allen, J.J. Thomas) Cement and Concrete Research 37, pp. 319-324 (2007). “A multi-technique investigation of the nanoporosity of cement paste” (H.M. Jennings, J.J. Thomas, J.S. Gevrenov, G. Constantinides, F.-J. Ulm) Cement and Concrete Research 37, pp. 329-336 (2007). “Decalcification shrinkage of cement paste” (J.J. Chen, J.J. Thomas, H.M. Jennings) Cement and Concrete Research 36, pp. 801-809 (2006).

“A colloidal interpretation of chemical aging of the C-S-H gel and its effects on the properties of cement paste” (J.J. Thomas, H.M. Jennings) Cement and Concrete Research 36, pp. 30-38 (2006).

“Nanostructure of C-S-H gel in cement paste as a function of curing conditions and relative humidity” (H.M. Jennings, J.J. Thomas, J.S. Gevrenov, G. Constantinides, F.-J. Ulm) pp. 19-37 in Creep, Shrinkage and Durability of Concrete and Concrete Structures, Proceedings of Seventh International Conference CONCREEP-7, edited by G. Pijaudier-Cabot, B. Gerard, P. Acker. Nantes, France, September 2005. (Hermes Science, London, 2005).

“Effects of decalcification on the microstructure and surface area of cement and tricalcium silicate pastes” (J.J. Thomas, J.J. Chen, A.J. Allen, H.M. Jennings) Cement and Concrete Research 34, pp. 2297-2307 (2004).

“Solubility and structure of calcium silicate hydrate” (J.J. Chen, J.J. Thomas, H.F.W. Taylor, H.M. Jennings) Cement and Concrete Research 34, pp. 1499-1519 (2004).

“A discussion of the paper “The BET-specific surface area of hydrated Portland cement and related minerals” by Ivan Odler” (H.M. Jennings, J.J. Thomas) Cement and Concrete Research 34, pp. 1959-1960 (2004).

“Ca-OH Bonding in the C-S-H gel phase of Tricalcium Silicate and White Portland Cement Pastes Measured by Inelastic Neutron Scattering” (J.J. Thomas, D.A. Neumann, J.J. Chen, H.M. Jennings) Chemistry of Materials 15, pp. 3813-3817 (2003).

“Use of a New Imaging Technique to Document Deformations Recorded in the Environmental Scanning Electron Microscope” (E.F. O'Neil, J.J. Thomas, H.M. Jennings) Microscopy Today 11, pp. (2003).

“Changes in the size of pores during shrinkage (or expansion) of cement paste and concrete” (J.J. Thomas, H.M. Jennings) Cement and Concrete Research 33, pp. 1897-1900 (2003).

“Effect of Hydration Temperature on the Solubility behavior of Ca-, S-, Al-, and Si-Bearing Solid Phases in Portland Cement Pastes” (J.J. Thomas, D. Rothstein, H.M. Jennings, B.J. Christensen) Cement and Concrete Research 33, pp. 2037-2047 (2003).

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“Effect of Heat Treatment on the Pore Structure and Drying Shrinkage Behavior of Hydrated Cement Paste” (J.J. Thomas, H.M. Jennings) Journal of the American Ceramic Society 85, pp. 2293-2298 (2002).

“Chapter 6.11: Cements as Porous Materials” (H.M. Jennings, J.J. Thomas, D. Rothstein, J.J. Chen) pp. 2971-3028 in Handbook of Porous Solids, edited by F. Schüth, K.S.W. Sing, J. Weitkamp. (Wiley-VCH, Weinheim, Germany, 2002).

“A Neutron Scattering Study of the Role of Diffusion in Cement Hydration” (S.A. FitzGerald, J.J. Thomas, D.A. Neumann, R.A. Livingston) Cement and Concrete Research 32, pp. 409-413 (2002).

“Solubility behavior of Ca-, S-, Al-, and Si-bearing solid phases in Portland cement pore solutions as a function of hydration time” (D. Rothstein, J.J. Thomas, B.J. Christensen, H.M. Jennings) Cement and Concrete Research 32, pp. 1663-1671 (2002).

“State of Water in Hydrating Tricalcium Silicate and Portland Cement Pastes as Measured by Quasi-Elastic Neutron Scattering” (J.J. Thomas, D.A. Neumann, S.A. FitzGerald, R.A. Livingston) Journal of the American Ceramic Society 84, pp. 1811-1816 (2001).

“Application of the Deformation Mapping Technique to Assessing Deterioration in Cement-Based Materials” (J.J. Chen, D. Rothstein, J.J. Thomas, H.M. Jennings) Journal of the Transportation Research Board 1775, pp. 28-35 (2001).

“Chemical Aging and the Colloidal Structure of the C-S-H Gel: Implications for Creep and Shrinkage” (J.J. Thomas, H.M. Jennings) pp. 33-39 in Creep, Shrinkage, and Durability Mechanics of Concrete and Other Quasi-Brittle Materials - Proceedings of the Sixth International Conference CONCREEP-6, edited by F.J. Ulm, Z.P. Bazant, F.H. Wittmann. Cambridge, MA, August 2001. (Elsevier, Oxford, UK, 2001).

“Early measurement of concrete deterioration by the deformation mapping technique” (D. Rothstein, J.J. Chen, J.J. Thomas, H.M. Jennings) pp. 1530-1536 in Third International Conference on Concrete Under Severe Conditions, edited by N. Banthia, K. Sakai, O.E. Gjorv. Vancouver, Canada, October 2001.

“Effects of D2O and Mixing on the Early Hydration Kinetics of Tricalcium Silicate” (J.J. Thomas, H.M. Jennings) Chemistry of Materials 11, pp. 1907-1914 (1999).

“The Surface Area of Hardened Cement Paste as Measured by Various Techniques” (J.J. Thomas, H.M. Jennings, A.J. Allen) Concrete Science and Engineering 1, pp. 45-64 (1999).

“Quasielastic Neutron Scattering Study of the Effect of Water to Cement Ratio on the Hydration Kinetics of Tricalcium Silicate” (R. Berliner, M. Popvici, K.W. Herwig, M. Berliner, H.M. Jennings, J.J. Thomas) Cement and Concrete Research 28, pp. 231-244 (1998). “The Surface Area of Cement Paste as Measured by Neutron Scattering - Evidence for Two C-S-H Morphologies” (J.J. Thomas, H.M. Jennings, A.J. Allen) Cement and Concrete Research 28, pp. 897-905 (1998). “Determination of the Neutron Scattering Contrast of Hydrated Portland Cement Paste Using H2O/D2O Exchange” (J.J. Thomas, H.M. Jennings, A.J. Allen) Advanced Cement Based Materials 7, pp. 119-122 (1998). “Chemistry of the Aqueous Phase of Ordinary Portland Cement Pastes at Early Reaction Times” (A.J. Kelzenberg, S.L. Tracy, B.J. Christensen, J.J. Thomas, M.E. Clarage, S.K. Hodson, H.M. Jennings) Journal of the American Ceramic Society 81, pp. 2349-2359 (1998). “Free-Energy-Based Model of Chemical Equilibria in the CaO-SiO2-H2O System” (J.J. Thomas, H.M. Jennings) Journal of the American Ceramic Society 81, pp. 606-612 (1998). "Neutron Scattering Studies of Hydrating Cement Pastes" (R. Berliner, M. Popvici, K.W. Herwig, H.M. Jennings, J.J. Thomas) Physica B 241, pp. 1237-1239 (1998).

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AWARDS

Cabell Fellowship (Northwestern, 1993-94) General Electric Fellowship (Northwestern, 1989-90) McMullen Dean's Fellowship (Cornell, 1985-86) National Merit Scholar (1985)

OTHER ACTIVITIES

• Chair of the Cements Division of the American Ceramic Society (2005/2006)

• Beam time proposal reviewer, National Center for Neutron Research

• Graduate student advisor (Department of Civil Engineering, Northwestern University)

• Fellow of the Residential College of Cultural and Community Studies at Northwestern University