H. Celik Ozyildirim, Ph.D., P.E.
Principal Research Scientist
Research Interests:
- Concrete
- High performance concrete
- Concrete pavements
- Permeability
- Admixtures
- Workability
- Specifications
Education:
- Ph.D., Civil Engineering, University of Virginia, 1974
- MSCE, Robert College, Turkey, 1969
- BSCE, Robert College, Turkey, 1967
Registrations:
- Registered Professional Engineer, Commonwealth of Virginia
Memberships:
- American Concrete Institute
- ACI Committee 211, Proportioning Concrete Mixtures
- ACI Committee 233, Ground Slag in Concrete
- ACI Committee 234, Silica Fume in Concrete
- ACI Committee 236, Material Science of Concrete
- ACI Committee 237, Self-Consolidating Concrete
- ACI Committee 238, Workability of Fresh Concrete
- ACI Committee 308, Curing Concrete
- ACI Committee 309, Consolidation of Concrete
- ACI Committee 327, Roller Compacted Concrete Pavements
- ACI Committee 329, Performance Criteria for Ready Mixed Concrete
- ACI Committee 506, Shotcreting
- ACI Committee 544, Fiber Reinforced Concrete
- Chairman, ACI Committee 309 -Consolidation of Concrete (1992-1998)
- American Society for Testing and Materials (ASTM)
- Member, Committee C-9, Concrete and Concrete Aggregates (1984-present)
- Member, ASTM Subcommittees
- C09.24 Supplementary cementitious materials
- C09.27 Ground slag
- C09.45 Roller compacted concrete
- C09.47 Self-consolidating concrete
- C09.49 Pervious concrete
- C09.60 Testing fresh concrete
- C09.61 Testing for strength
- C09.64 Non-destructive and in place testing
- Chairman, ASTM C 39 Task Group on Compressive Strength of Cylindrical Concrete Specimens (2002 -2008)
- Transportation Research Board
-
- Member Emeritus, Section AKM50 (AFN10,A2E06) – Advanced Concrete Materials and Characterization
- Member, AFN15T Task Force on Nanotechnology-Based Concrete Materials
Chairman, Section A2E00 - Section on Concrete (1994-2000) - Member Committee A2E05 - Chemical Additions and Admixtures for Concrete (1984-1994)
- Chairman, Committee A2E05 (1987-1993)
- Member, NCHRP Panel 18-03, Silica Fume Concrete
- Member, NCHRP Panel 18-08A, Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks
- Member, NCHRP Panel, 18-09A, Guidelines for Reducing Premature Deterioration of Hydraulic Cement Concrete
- TRB Section AFN10, Basic Research and Emerging Technologies Related to Concrete
Awards:
- VDOT Commissioner’s Lifetime Achievement Award, 2023
- VTRC Wallace T. McKeel Award, 2023
- VTRC Jack H. Dillard Best Paper Award, "Corrosion Resistant Carbon Fiber Reinforced Polymer for Prestressed Piles" (with A. Moruza and S. Sharp), 2018
- ACI Ambassador Speaker to Thailand, 2018
- VTRC Jack H. Dillard Best Paper Award, 2017
- ACI Ambassador Speaker to Singapore, 2017
- ACI Cedric Willson Lightweight Concrete Award, 2014
- Robert E. Philleo award of the Concrete Research Council, ACI Foundation, 2010
- Katharine and Bryant Mather Commemorative Lecture, ACI, 2010
- Frank G. Erskine award of the Expanded Shale, Clay and Slate Institute, 2009
- TRB Profile in TR News, Number 251, Transportation Research Board, 2007
- TRB Member Emeritus, Committee AFN10, Basic Research and Technologies Related to Concrete, 2001
- VDOT Commissioner's Award for Excellence, 1998
- Fellow of the American Concrete Institute, 1993
Current Projects
-
Reducing Carbon Foot-Print in Concrete Applications
Project No: 124299 -
Performance of Portland Limestone Cement and Supplementary Cementitious Materials in VDOT Concretes
Project No: 124300 -
Limiting the Total Cementitious Materials Content in Concretes
Project No: 124301 -
Updating VDOT’s Concrete Permeability Requirements
Project No: 126728 -
Effect of Bridge Deck Placement Sequences on Cracking Performance
Project No: 126187 -
Entire Interior Culvert Lining with Engineered Cementitious Composites
Project No: 122144 -
Alkali-Silica Reaction (ASR) Mitigation in High Alkali Content Cements
Project No: 122315 -
A Follow Up Evaluation of the Concrete Pavements (US 58) Rehabilitated in 2012
Project No: 126246 -
Fiber Reinforced Concrete (FRC) Beam End Repairs for Corroded Steel Beam Ends
Project No: 120661
Reports
-
Combinations of Pozzolans and Ground, Granulated Blast-furnace Slag for Durable Hydraulic Cement Concrete
Report No: 00-R1 -
High Performance Concrete in a Bridge in Richlands, Virginia
Report No: 00-R6 -
Evaluation of High Performance Concrete Overlays Placed on Route 60 Over Lynnhaven Inlet in Virginia
Report No: 01-R1 -
Evaluation of Hydraulic Cement Concrete Overlays Placed on Three Pavements in Virginia
Report No: 01-R2 -
Performance of the First Structure Built with High Performance Concrete in Virginia
Report No: 02-R1 -
Evaluation of Self-Consolidating Concrete
Report No: 03-R13 -
Evaluation of Continuously Reinforced Hydraulic Cement Concrete Pavement at Virginia's Smart Road
Report No: 04-R22 -
End-result Specification for Hydraulic Cement Concrete
Report No: 05-R29 -
Evaluation of High Performance Concrete Pavements in Newport News and Hampton, Virginia
Report No: 05-R7 -
High-performance Fiber-reinforced Concrete in a Bridge Deck
Report No: 06-R11 -
First Bridge Structure with Lightweight High-performance Concrete Beams and Deck in Virginia
Report No: 06-R12 -
Evaluation of Precast Patches on U.S. 60 Near the New Kent and James City County Line
Report No: 06-R22 -
Influence of Hycrete DSS on Virginia Department of Transportation Class A4 Concrete Mix Designs
Report No: 07-R30 -
Exploratory Investigation of High-performance Fiber-reinforced Cementitious Composites for Crack Control
Report No: 08-R12 -
High-performance Continuously Reinforced Concrete Pavements in Richmond and Lynchburg, Virginia
Report No: 08-R4 -
Measurement of Early Age Shrinkage of Virginia Concrete Mixtures
Report No: 08-R9 -
Evaluation of Lightweight High-Performance Concrete in Bulb-T Beams and Decks in Two Bridges on Route 33 in Virginia
Report No: 09-R22 -
Bulb-T Beams with Self-consolidating Concrete on the Route 33 Bridge Over the Pamunkey River in Virginia
Report No: 09-R5 -
Laboratory Investigation of Nanomaterials to Improve the Permeability and Strength of Concrete
Report No: 10-R18 -
Investigation of Fiber-Reinforced Self-Consolidating Concrete
Report No: 10-R8 -
Laboratory Investigation of Lightweight Concrete Properties
Report No: 11-R17 -
Evaluation of Ultra-High-Performance Fiber-Reinforced Concrete
Report No: 12-R1 -
Preparation and Testing of Drilled Shafts with Self-Consolidating Concrete
Report No: 12-R15 -
End-Result Specifications for Hydraulic Cement Concrete: Phase II
Report No: 12-R2 -
Use of Precast Slabs for Pavement Rehabilitation on I-66
Report No: 12-R9 -
Lightweight High-Performance Concrete Bulb-T Beams with Self-Consolidating Concrete in a Bridge Structure
Report No: 14-R15 -
Use of Concrete Pavement Overlays on U.S. 58 in Virginia
Report No: 14-R16 -
Corrosion Sensitivity of Concrete Mix Designs
Report No: 14-R19 -
Nondestructive Measurements Using Mechanical Waves in Reinforced Concrete Structures
Report No: 14-R8 -
Use of Roller-Compacted Concrete Pavement in Stafford, Virginia
Report No: 15-R19 -
Bridge Beams and Pier Caps With Self-Consolidating Concrete at Nimmo Parkway
Report No: 16-R11 -
Reducing Cracks in Concrete Bridge Decks Using Shrinkage Reducing Admixture
Report No: 16-R13 -
Use of Lightweight Concrete for Reducing Cracks in Bridge Decks
Report No: 16-R14 -
Evaluation of Bridge Deck With Shrinkage-Compensating Concrete
Report No: 16-R15 -
Investigation of Roller-Compacted Concrete for Use in Pavements in Virginia
Report No: 17-R10 -
Evaluation of High-Performance Fiber-Reinforced Concrete for Bridge Deck Connections, Closure Pours, and Joints
Report No: 17-R15 -
Determination of Mechanical Properties for Cement-Treated Aggregate Base
Report No: 17-R21 -
Investigation of Properties of High-Performance Fiber-Reinforced Concrete: Very Early Strength, Toughness, Permeability, and Fiber Distribution
Report No: 17-R3 -
Low Cracking Concretes for the Closure Pours and Overlays of the Dunlap Creek Bridge
Report No: 18-R10 -
Development of a Special Provision on the Use of Pervious Concrete As a Stormwater Management Tool in Parking Lots
Report No: 18-R15 -
Repairs With Self-Consolidating Concrete and Galvanic Anodes to Extend Bridge Life
Report No: 18-R9 -
Corrosion-Free Carbon Fiber Reinforced Polymer for Prestressed Piles
Report No: 19-R13 -
Premature Failure of Concrete Patching: Reasons and Resolutions
Report No: 19-R14 -
Concrete Beams Prestressed Using Carbon Fiber Reinforced Polymer
Report No: 19-R29 -
Corrosion-Resistant Stainless Steel Strands for Prestressed Bridge Piles in Marine Atmospheric Environments
Report No: 20-R2 -
Laboratory Investigation of Underwater Concreting
Report No: 20-R21 -
Laboratory Investigation of Workable and Durable Concretes for Bridge Repair
Report No: 20-R29 -
Carbon Fiber Reinforced Polymer (CFRP) for Pretension Applications: Material Acceptance Criteria and Advancing Anchorage Designs
Report No: 20-R5 -
Assessment of Composite Pavement in Virginia: A Trial Section on US 60
Report No: 21-R3 -
Corrugated Metal Pipe Culvert Invert Repair Using Engineered Cementitious Composite
Report No: 21-R5 -
Use of Sand Lightweight Concrete and All Lightweight Concrete
Report No: 24-R16 -
Fiber-Reinforced Concrete Overlays for Bridge Structures
Report No: 25-R13 -
Laboratory Investigation of Concretes for Partial-Depth Link Slabs
Report No: 25-R17 -
Mass Concrete Mixtures Optimized for Temperature Control and Workability
Report No: 25-R2 -
Field Evaluation of Reinforced Concrete Repairs Using Hydrodemolition, Galvanic Cathodic Protection, or Impressed Current Cathodic Protection
Report No: 25-R22 -
Roundabout Construction Using Precast Concrete in Virginia
Report No: 26-R07 -
A Laboratory Experiment in Evaluating Means of Imparting a Harsh Texture to Portland Cement Concrete Surfaces
Report No: 70-R12 -
Durability of Certain Configurations for Providing Skid Resistance on Concrete Pavements
Report No: 73-R57 -
Determining Elastic Moduli of Materials in Pavement Systems by Surface Deflection Data: A Feasibility Study
Report No: 76-R10 -
Effect of Long Steam Curing Durations on the Strength of A5 Concrete
Report No: 76-R46 -
Alternatives to Type II Cement: Part I, Preliminary Laboratory Studies
Report No: 77-R38 -
Distribution of Voids in Field Concrete
Report No: 78-R35 -
Alternatives to Type II Cement: Final Report
Report No: 79-R3 -
Neoprene Pads for Capping Concrete Cylinders
Report No: 79-R39 -
Evaluation of Experimental Installation of Fly Ash Concrete in Louisa: Concrete Case Study Number 32
Report No: 79-R52 -
Rating and Analysis of Continuous Girder Bridges
Report No: 80-R47 -
Placement of Low-Slump Concrete: Final Report
Report No: 81-R33 -
Evaluation of a Nuclear Gage for Controlling the Consolidation of Fresh Concrete: Final Report
Report No: 81-R41 -
Internally-sealed Concrete for Bridge Deck Protection
Report No: 82-R19 -
Use of Neoprene Pads in Testing Concrete Cylinders: Final Report
Report No: 82-R58 -
Investigation of Concrete Mixtures Incorporating Hollow Plastic Microspheres
Report No: 82-R7 -
Comparison of Two Freeze-Thaw Apparatus
Report No: 83-R16 -
Internally Sealed Concrete for Bridge Deck Protection: Final Report
Report No: 84-R4 -
Evaluation of Hydraulic Cement Concretes Containing Slag Added at the Mixer
Report No: 84-R40 -
4 x 8 inch Concrete Cylinders versus 6 x 12 Cylinders
Report No: 84-R44 -
Use of Interactive Graphics in Bridge Analysis and Design
Report No: 84-R7 -
Air Void Characteristics of Hardened Concrete, 1945-1980
Report No: 85-R30 -
Evaluation of Hydraulic Cement Concretes Containing Slag Added at the Mixer
Report No: 86-R1 -
Tests for Early Acceptance of Concrete
Report No: 86-R2 -
Pilot Study of Proposed Revisions to Specifications for Hydraulic Cement Concrete
Report No: 86-R24 -
Investigation of Concrete Containing Condensed Silica Fume
Report No: 86-R25 -
Investigation of Concrete Containing Slag: Hampton River Bridge
Report No: 86-R39 -
Experimental Use of Fly Ash Concrete in Prefabricated Bridge-deck Slabs
Report No: 88-R1 -
Resistance to Chloride Ion Penetration of Concretes Containing Fly Ash, Silica Fume, or Slag
Report No: 88-R11 -
Use of Supplemental Cementitious Materials for Optimum Resistance of Concrete to Chloride Penetration
Report No: 89-R20 -
Comparison of Air Void Content Measurements in Fresh Versus Hardened Concretes
Report No: 90-R23 -
Optimum Mixture Proportions for Concretes Containing Fly Ash and Silica Fume
Report No: 91-R21 -
Construction of a Thin-bonded Portland Cement Concrete Overlay Using Accelerated Paving Techniques
Report No: 92-IR2 -
Factors Affecting the Performance of Bridge Decks in Virginia
Report No: 92-R2 -
Low-permeability Concretes Containing Slag and Silica Fume
Report No: 93-R10 -
A Field Investigation of a Concrete Overlay Containing Silica Fume on Route 50 over Opequon Creek
Report No: 93-R15 -
Effect of Calcium Nitrite on the Properties of Concrete Used in Bridge Decks
Report No: 93-R4 -
Effect of Calcium Nitrite on the Properties of Concrete Used in Prestressed Piles and Beams
Report No: 93-R5 -
A Field Investigation of Concrete Patches Containing Pyrament Blended Concrete
Report No: 94-R26 -
Use of Fly Ash, Slag, or Silica Fume to Inhibit Alkali-silica Reactivity
Report No: 95-R21 -
Effects of Blends of Cement Kiln Dust and Fly Ash on Properties of Concrete
Report No: 96-R1 -
A Field Investigation of Concrete Overlays Containing Latex, Silica Fume, or Pyrament Cement
Report No: 96-R23 -
Design of High-performance Concrete Mixtures and Test Beams for a Bridge in Virginia
Report No: 96-R27 -
Investigation of Fiber-reinforced Concrete for Use in Transportation Structures
Report No: 97-R15 -
Effects of Temperature on the Development of Low Permeability in Concretes
Report No: 98-R14 -
Field Evaluation of Corrosion Inhibitors for Concrete.
Report No: 99-IR1 -
Evaluation of the Installation and Initial Condition of Hydraulic Cement Concrete Overlays Placed on Three Pavements in Virginia
Report No: 99-IR3 -
Evaluation of the Installation and Initial Condition of High Performance Concrete Overlays Placed on Route 60 Over Lynnhaven Inlet in Virginia
Report No: 99-IR4 -
Field Evaluation of Corrosion Inhibitors for Concrete.
Report No: 99-IR5 -
Fabricating and Testing Low-permeability Concrete for Transportation Structures
Report No: 99-R6
Last updated: August 2, 2025