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Stacey D. Diefenderfer, P.E.
Research Scientist

Phone: (434) 293-1933
Email: Stacey.Diefenderfer@VDOT.Virginia.gov

Research:

Asphalt materials characterization, evaluation, performance and design
Flexible pavement design and analysis

Education:

M.S., Civil Engineering, Virginia Polytechnic Institute and State University
B.S., Civil Engineering, Virginia Polytechnic Institute and State University

Registration:

Professional Engineer, Virginia

Memberships:

Transportation Research Board
   Young Member: AFK20 Characteristics of Bituminous Materials
   Friend of Committee: AFK50 Characteristics of Bituminous Paving Mixtures to Meet Structural Requirements
   AFK30 Characteristics of Nonbituminous Components of Bituminous Paving Materials
Association of Asphalt Paving Technologists
American Society of Civil Engineers
Member: Highway Pavements Committee, Transportation and Development Institute
NCHRP Panel 09-22, Beta Testing and Validation of HMA PRS

Awards:

Charles E. Via Doctoral Fellowship, Charles E. Via Department of Civil and Environmental Engineering, Virginia Tech, Fall 1999 - Spring 2003
Dean's List for Teaching Excellence, College of Engineering, Virginia Tech, Spring 2000

Team Memberships:

Materials

Projects:

94209 - Asphalt Material Characteristics for Use with the MEPDG - Phase I - Co-Principal Investigator

87460 - Warm Mix Asphalt Performance - Principal Investigator

86812 - ‘Mechanistic-Empirical Pavement Design Guide’ Sensitivity Analysis: Binder Properties - Principal Investigator

85364 - Evaluation of Using Higher Percentage of Rap in Asphalt Mixes in Virginia - Co-Principal Investigator

80577 - Laboratory Evaluation of Warm Asphalt for Use in Virginia - Principal Investigator

78286 - Asphalt Materials Characterization in Support of Implementation of the Proposed Mechanistic-Empirical Pavement Design Guide - Co-Principal Investigator

75399 - Detection of Polymer Modifiers in Asphalt Binder - Principal Investigator

75398 - Permanent Deformation and Fatigue Characteristics of Superpave Mixtures - Principal Investigator

Publications:

09-R11 - Laboratory evaluation of a warm asphalt technology for use in Virginia

08-R22 - Evaluation of using higher percentages of recycled asphalt pavement in asphalt mixes in Virginia

07-R25 - Installation of warm mix asphalt projects in Virginia

07-CR10 - Asphalt materials characterization in support of implementation of the proposed mechanistic-empirical pavement design guide

06-R5 - Creep and fatigue characteristics of Superpave mixtures

06-R18 - Detection of polymer modifiers in asphalt binder

06-CR1 - Fatigue life characterization of Superpave mixtures at the Virginia Smart Road