SHELL-SAND BASE COURSE CONSTRUCTION IN LOUISIANA

SHELL AND SHELL SAND BASE COURSE CONSTRUCTION IS PRIMARILY USED FOR FLEXIBLE PAVEMENT CONSTRUCTION IN LOUISIANA. MIXING AND BLENDING OF THE SHELL AND SAND ARE ACCOMPLISHED BY SEVERAL METHODS' /1/ STATIONARY PUGMILL, /2/ BLADE MIXING ON ROADWAY OR ON MIXING TABLE, /3/ TRAVELING PUGMILL TYPE MIXER, AND /4/ TRAVELING STABILIZER TYPE MIXER. THE MOST FREQUENTLY USED EQUIPMENT FOR COMPACTING SHELL-SAND BASE COURSES IS THE SHEEPSFOOT AND RUBBER TIRED ROLLERS. VIBRATORY COMPACTORS HAVE BEEN USED SUCCESSFULLY, THOUGH NOT EXTENSIVELY, IN SOUTHERN LOUISIANA. THE SAND DISPLACEMENT METHOD OF DETERMINING THE VOLUME OF THE TEST HOLE HAS PROVEN TO BE MORE EFFECTIVE THAN THE BALLOON DENSITY VOLUMETER BECAUSE THE SHARPNESS OF THE SHELL AGGREGATE USUALLY CAUSES PUNCTURES IN THE BALLOON. HIGH BEARING VALUE BASE COURSES ARE OBTAINED WITH SHELL AND LOCAL SAND ADMIXTURES. RESEARCH SHOWS THAT THE CRITICAL MAXIMUM SAND CONTENT IS 40% BY VOLUME, VEHICULAR MEASUREMENT. TYPICAL DESIGN FOR FARM TO MARKET ROADS, AND PRIMARY AND INTERSTATE HIGHWAYS ARE OUTLINED.

  • Supplemental Notes:
    • 2nd Conf PrOC, PP 1-23, 1 FIG, 28 PHOT, 2 APP
  • Authors:
    • Vincent, W C
  • Publication Date: 0

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00231033
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 15 2004 2:41AM