DETECTION AND DETERMINATION OF GROUND, CURED SCRAP RUBBER IN HOT-POURED JOINT SEALERS

A METHOD WAS DEVELOPED FOR THE QUALITATIVE DETECTION AND QUANTITATIVE ESTIMATION OF GROUND, CURED RUBBER SCRAP IN HOT -POURED ELASTIC PAVEMENT JOINT SEALERS. DETECTION OF THIS INGREDIENT WAS ACCOMPLISHED IN TWO WAYS: (1) MICROSCOPIC EXAMINATION OF THIN FILMS OF THE JOINT SEALANT BY TRANSMITTED LIGHT TO REVEAL PARTICULATE MATTER, AND (2) BY INFRARED SPECTROPHOTOMETRIC ANALYSIS OF THE METHYL ETHYL KETONE SOLUBLE PORTION OF THE JOINT SEALER. QUANTITATIVE ESTIMATION OF THE CURED RUBBER SCRAP CONTENT OF FOUR DIFFERENT JOINT SEALERS WAS DONE BY INFRARED SPECTROPHOTOMETRIC ANALYSIS OF THE METHYL ETHYL KETONE SOLUBLE PORTIONS. THE AMOUNT OF INFRARED ABSORPTION AT 10.3 MICRONS WAS FOUND TO BE INDICTATIVE OF SCRAP RUBBER CONTENT. THE RESULTS OBTAINED WERE IN AGREEMENT WITH VERBAL REPORTS OF INDUSTRY PRACTICE BUT COULD NOT BE CONCLUSIVELY CHECKED BECAUSE SCRAP-FREE BLANKS WERE NOT AVAILABLE. /AUTHOR/

• Supplemental Notes:
  • Hpr, 63g-124, RESEARCH REPORT R-641
• Corporate Authors:

  Michigan Department of State Highways

  State Highways Building, PO Drawer K
  Lansing, MI  United States  48904
• Authors:
  • Frederick, W L
  • Matel, R J
• Publication Date: 1967-8

Subject/Index Terms

• TRT Terms: Absorption; Detection and identification; Detectors; Infrared radiation; Joint sealing; Ketones; Microscopy; Rubber; Scrap; Sealing compounds; Spectrophotometers; Thin films
• Old TRIS Terms: Infrared spectrophotometers
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215862
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS, STATEDOT
• Created Date: Jan 8 1994 12:00AM