IN SERVICE BEHAVIOR OF PREFORMED NEOPRENE JOINT SEALS- INTERIM REPORT

TWO DIFFERENT NEOPRENE JOINT SEAL CONFIGURATIONS ARE BEING EVALUATED UNDER ACTUAL FIELD CONDITIONS AND USING NORMAL INSTALLATION TECHNIQUES. SIX PAVING CONTRACTS WERE SELECTED FOR THIS INVESTIGATION. THE NEOPRENE CHEVRON COMPRESSION SEAL WAS INSTALLED ON TWO CONTRACTS AND THE NEOPRENE DELASTIC SERIES "A" WAS INSTALLED ON FOUR CONTRACTS. ONE CONTRACT USING A STANDARD HOT- POURED LIQUID SEALING COMPOUND WAS USED AS A CONTROL. THE INSTALLATION OF THE NEOPRENE SEALS WAS DONE IN ACCORDANCE WITH THE MARYLAND SPECIFICATIONS. SUBSEQUENT TO CONSTRUCTION, TWO DETAILED EXAMINATIONS ARE MADE EACH YEAR ON EACH PROJECT. AFTER TWO YEARS, THE GENERAL CONDITION OF THE SEALS APPEARS TO BE GOOD WITH PERFORMANCE BEING GENERALLY SATISFACTORY. THE MAIN CAUSES OF POOR PERFORMANCE APPEAR TO BE IN THE INSTALLATION PROCEDURES. IN CONTRAST, THE REGULAR HOT- POURED MATERIAL HAS PERFORMED POORLY, WITH A SEALING LIFE OF LESS THAN TWO YEARS ON THE ONE CONTRACT OBSERVED. /FHWA/

• Supplemental Notes:
  • Contract No AW 72-102-46
• Corporate Authors:

  Maryland Department of Transportation

  State Highway Administration, 707 N Calvert Street
  Baltimore, MD  United States  21202
• Authors:
  • Stromberg, F J
  • Weisner, J
  • Kinney, F S
• Publication Date: 1972-7

Media Info

• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Building; Facilities; Installation; Joint sealers; Neoprene; Shape
• Uncontrolled Terms: Configuration
• Subject Areas: Construction; Geotechnology; Highways; Maintenance and Preservation; Materials;

Filing Info

• Accession Number: 00215987
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Files: TRIS, USDOT, STATEDOT
• Created Date: Apr 30 1973 12:00AM