Repair of Concrete

This course will show you how to evaluate the condition of your concrete and how to protect your existing concrete with the right repair materials and techniques. Specifically, you’ll come away with honed repair methods for structural concrete, floor slabs, and slabs on grade, along with strategies for reinforcing and post-tensioning.

• Contractors
• Engineers
• Architects
• Project managers
• Facility managers

Welcome and Introductions

Achieving Durable Concrete in Your Repair Projects

• Concrete materials
  • Cements
  • Aggregates
  • Admixtures
• Concrete placement, consolidating, and finishing
• Concrete curing
• Understanding the causes of common deterioration
• Key factors in preventing concrete failures
• Overview of project repair approaches

Evaluating Concrete Condition 

• Types of damage
  • Cracking, water leakage, and staining
  • Corrosion-related damage
  • Structural deficiencies and distress
  • Fire damage
• Strength and durability considerations
• Assessing the risk of failure
• Methods of damage assessment 

Concrete Repair Materials 

• Material types
• Material properties
  • Dimensional stability 
  • Modulus of elasticity
  • Coefficient of thermal expansion 
  • Permeability
  • Conductivity
• Fundamentals of application of concrete repair materials 

Concrete Removal and Surface Preparation 

• Conventional methods
• Hydrodemolition
• Hydraulic nibblers
• Diamond cutting
• Mechanical scarification 
• Abrasive blasting 
• Dealing with environmental impacts

Structural Repairs 

• Post-tensioning repairs
• External post-tensioning
• Shear collars
• Supplemental shear reinforcement
• Overlays
• Using appropriate repair methods for different structure types
• Case studies 

Protection Methods for Concrete Structures 

• Paints
• Membranes
• Sealers
• Overlays
• Cathodic protection

Concrete Repair Specifications 

• Writing a specification for quality repair
• Monitoring repairs for conformance to specifications 

 Repair Methods for Concrete 

• Reinforcing steel considerations 
  • Corrosion: chlorides and carbonation
  • Welding
  • Steel dowels
• Concrete
  • Super-plasticized concrete
  • Dry pack
  • Shotcrete
  • Preplaced aggregate concrete
  • Latex-modified concrete
• Pressure grouting
• Epoxy crack injection

Repair of Floor Slabs

• Crack repair
  • Epoxy injection
  • Route and seal
  • Stitching/Pinning
• Joint stabilization 
  • Subsealing
  • Load transfer devices
• Overlays and coatings
  • Latex modified concrete
  • Thin polymer
  • Self leveling

Repair of Pavement, Sidewalks, and Exterior Slabs on Grade

• Partial and full depth repairs
• Faulting repairs 
• Bonded and unbounded overlays
• Joint sealing

"Absolutely great! I can't believe you were able to cover so many different areas in so much depth in 3 days. Way better than the paper brochure indicated."
— Travis, DGR Engineering, Rock Rapids, IA

"I am walking away feeling a lot more confident than when I got here...Don't know any other way I could have learned so much so quick."
— Brian, Concrete Repair & Restoration, Indian Trail, NC

Mike Ayers

Michael E. Ayers, PhD, is the founder and president of Global Pavement Consultants, Inc. Ayers has more than 30 years of experience in research, design, construction, materials, rehabilitation, and training, focusing on concrete pavements. He has served the industry in academia, private consulting, and as an industry spokesperson with a national trade organization. Ayers has served as an instructor at World of Concrete for over a decade. 

James Donnelly

James P. Donnelly, PE, SE, is a principal with Wiss, Janney, Elstner Associates, Inc., Northbrook, Illinois. Donnelly is involved in structural investigations and repairs, including major investigations of distress in post-tensioned, precast, and conventionally reinforced concrete structures. He has also developed repair specifications for collapsed decks, precast wall panels, and many other concrete structure defects. Donnelly serves on the ACI committees on Prestressed Concrete and Parking Structures and on Post-Tensioning Institute (PTI) Repair and Rehabilitation Committee. 

George Seegebrecht

George W. Seegebrecht, PE, FACI, is the founder and principal of Concrete Consulting Engineers, LLC, Westchester, Illinois. Seegebrecht has more than 35 years of experience in concrete research, evaluation, and repair of distressed concrete. His responsibilities have included recommending repair methods for buildings, parking facilities, bridges, pavements, and other structures. He is a member of ACI committees including Specifications for Structural Concrete, Pervious Concrete, and numerous certification committees. He is also an associate member of the ACI Shotcrete Committee. Seegebrecht serves as Examiner of Record for the ACI-Illinois Certification Program. 

James Warner

James Warner, PE, Mariposa, California, is a consulting engineer specializing in concrete restoration and solutions to construction problems. Warner has worked on several hundred concrete restoration and repair projects and is an honorary life member of International Concrete Repair Institute. He is a frequent speaker at courses on concrete, including presentations at the World of Concrete.