THE EFFECT OF SURFACE COATINGS AND BONDED OVERLAYS ON MOISTURE MIGRATION

TESTS WERE MADE ON CONCRETE SPECIMENS THAT HAD BEEN COATED WITH FOUR DIFFERENT WATERPROOFING MATERIALS TO DETERMINE HOW FAR THE COATINGS PENETRATED INTO THE CONCRETE. ALSO, COATED SURFACES AND OVERLAID SPECIMENS WERE PONDED OVER WITH SALT WATER AND TAP WATER TO DETERMINE THE EFFECTIVENESS OF EACH TO PREVENT THE MIGRATION OF MOISTURE INTO THE CONCRETE SPECIMENS. FREEZE-THAW TESTS WERE MADE ON ASPHALTIC OVERLAYS TO DETERMINE THE EFFECT OF FREEZE-THAW CYCLING ON THE OVERLAYS AND THE PORTLAND CEMENT CONCRETE BENEATH THE OVERLAYS. SHEAR TESTS WERE MADE TO DETERMINE THE SHEAR STRENGTH OF CONCRETE OVERLAYS BONDED TO CONCRETE TEST BLOCKS. IT WAS FOUND THAT THE DEEPEST PENETRATION, 0.054 TO .062 IN., WAS MADE BY A MIXTURE OF LINSEED OIL AND KEROSENE. NO DAMAGE WAS FOUND UNDER THE ASPHALTIC OVERLAY AFTER 59 FREEZE-THAW CYCLES. SHEAR BOND STRENGTHS RANGED FROM 61 PSI TO 267 PSI WHEN THE CUBE SURFACES WERE TREATED WITH SURFACE COATINGS AND NOT SANDBLASTED, AND 367 PSI TO 597 PSI WHEN THE SURFACES WITH COATINGS WERE SANDBLASTED BEFORE OVERLAYING. /AUTHOR/

• Corporate Authors:

  Texas Transportation Institute

  Texas A&M University System, 1600 E Lamar Boulevard
  Arlington, TX  United States  76011

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701
• Authors:
  • Ingram, L L
  • Furr, H L
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Asphalt; Blast cleaning; Coatings; Concrete; Freeze thaw tests; Kerosene; Linseed oil; Overlays (Pavements); Pendulum tests; Portland cement concrete; Waterproofing materials
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00208017
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jan 24 1972 12:00AM