1 / 32

Applications for NDT in CMU and Masonry Walls

CMU and Brick Masonry Walls NDT Methods of Examining As-Built Construction and General Condition International Concrete Repair Institute Spring Conference 2011 Presented by Todd Allen – Radarview LLC. Applications for NDT in CMU and Masonry Walls. As-built construction:

tayten
Download Presentation

Applications for NDT in CMU and Masonry Walls

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CMU and Brick Masonry WallsNDT Methods of Examining As-Built Construction and General ConditionInternational Concrete Repair InstituteSpring Conference 2011Presented by Todd Allen – Radarview LLC

  2. Applications for NDT in CMU and Masonry Walls • As-built construction: • Modifications: New openings, Adding loads, etc. • Failure Investigations • Deterioration • Blast Upgrades • Flood Upgrades

  3. Examination Methods • Visual • Ground Penetrating Radar • Infrared Surveys • Pachometer Survey (Ferroscan) • Ultrasonic Pulse Velocity

  4. What can be detected? • CMU • Grout or Voids • Reinforcement • Electrical Conduit • Brick Masonry • Wall Tie Location • Wall Tie Installation (certain cases) • Wall Tie Condition

  5. CMU Grout • CMU Grout: • Grout location • Grout void detection

  6. CMU Grout /Voids - GPR

  7. CMU Grout / Voids - GPR Partially grouted

  8. CMU Grout / Voids - GPR

  9. CMU Grout / Voids - Infrared

  10. CMU Grout / Voids - Infrared Intersection of vertical column and bond beam Incorrect cell column filled

  11. CMU Grout / Voids - Infrared Proper angle the same wall Improper angle in relation to the sun

  12. CMU Grout / Voids – Infrared through stucco Partially grouted cell

  13. CMU Grout / Voids - Infrared Column/bond beam intersection

  14. CMU Reinforcement • CMU Reinforcement • Joint Reinforcement (Joint wire, joint steel, etc) • Vertical reinforcement: • Dowels location and height above slab • Spacing • Lap length • Horizontal Reinforcement (Bond Beams) • Location of bond beam • Number of bars in bond beam • Reinforcement around Openings

  15. CMU Reinforcement Vertical rebar Bond Beam

  16. CMU Reinforcement Joint reinforcement

  17. CMU Reinforcement

  18. CMU Reinforcement Laps from floor below Laps to floor above

  19. CMU Reinforcement

  20. CMU Reinforcement

  21. CMU Reinforcement/Grout Verification Bond beam has horizontal bar. Column had no rebar but was filled with grout

  22. CMU Reinforcement/Grout Verification Bond beam horizontal bar was present with little or no grout. Column had no grout and no rebar except for the slab dowel

  23. What can be detected? • Brick Masonry Wall Ties: • Location of Ties (important during failure or deterioration analysis) • Also benefits using endoscopic techniques for corrosion examination • Missing Ties • Improperly installed ties (certain cases) • Quality of fill for brick masonry columns

  24. Brick Walls – Masonry Tie Location

  25. Brick Walls – Masonry Tie Location Typical Wall Tie Location Joint reinforcement

  26. Brick Walls – Masonry Tie Visual Corrosion Survey Typical Wall Tie Location

  27. Brick Walls – Masonry Tie Visual Corrosion Survey Typical Wall Tie Location

  28. Brick Walls – Masonry Tie Visual Corrosion Survey Typical Wall Tie Location

  29. Quality of fill for brick masonry columns South Face North Face

  30. Quality of fill for brick masonry columns 71µ or2860 m/s Should be 28µ seconds or shorter indicating 3600 m/s or faster 99 µ seconds or shorter travel time Concrete Fill Brick

  31. Quality of fill for brick masonry columns

  32. Thank you Availability

More Related