CE TESTS NEW ROAD CONSTRUCTION MATERIALS

THE ARMY CORPS OF ENGINEERS HAS ANNOUNCED A NEW CONCEPT TO REDUCE THE TIME AND COST OF HIGHWAY CONSTRUCTION UNDER ADVERSE SOIL CONDITIONS. USE OF A PLASTIC WRAPPER TO ENCASE THE SUBGRADE MATERIAL OF A ROAD, PROVIDES PROTECTION AS A WATERPROOF SEAL AGAINST MIGRATION OF SUBSURFACE MOISTURE INTO THE MATERIAL. THIS ENABLES BUILDERS TO SUBSTITUTE FINE GRAINED SUBGRADE MATERIALS FOR A GRANULAR BASE COURSE. THE WRAPPER CONSISTS OF POLYPROPYLENE FIBERS INSERTED INTO A COTTON SCRIM BY A NEEDLE POINT PROCESS THAT REINFORCES A DISTRIBUTOR APPLICATION OF ASPHALT TO FORM A MEMBRANE. ASPHALT IS APPLIED TO THE POLYPROPYLENE STRIP AFTER IT HAS BEEN LAID OVER THE SELECTED ROAD SITE. THE SUBGRADE MATERIAL IS FILLED IN, COMPACTED, AND COVERED BY ANOTHER STRIP OF THE MATERIAL. THE TWO SHEETS ARE THEN SEALED TO ENCASE THE MATERIAL.

  • Supplemental Notes:
    • Vol 10, No 7, P 51, 1 PHOT
  • Publication Date: 1969-8

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Filing Info

  • Accession Number: 00215231
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 19 1970 12:00AM