NEW YORK TESTS CHEMICAL IN SUB-BASE

A NEW TYPE OF SUB-BASE IS BEING TESTED BY THE NEW YORK STATE DEPARTMENT OF TRANSPORTATION ON THE BUTTERNUT INTERCHANGE PROJECT AT EAST SYRACUSE, N. Y. CONSISTING OF CRUSHED STONE BLENDED WITH CALCIUM CHLORIDE WITH WATER ADDED, THE DENSE-GRADED SUB-BASE IS BEING SUPPLIED BY A QUARRY WHERE ALREADY-EXISTING FACILITIES FOR PRODUCING HIGH-FRICTION PAVEMENT ASPHALT MIX HAVE BEEN ADAPTED TO PRODUCTION OF THE TEST PROGRAM MATERIAL. IN MIXING THE SUB-BASE, VARIOUS SIZES OF CRUSHED AGGREGATE FROM 2" DOWN TO FINE ARE PLACED IN HOPPERS FROM WHICH THEY CAN BE ACCURATELY MEASURED TO CONFORM WITH TIGHT GRADATION REQUIREMENTS. THE AGGREGATES AND CALCIUM CHLORIDE, FLAKED TO PREVENT LUMPING, ARE THEN PROPORTIONED (20 LBS. CALCIUM CHLORIDE PER DU. YD.) FROM THE INDIVIDUAL HOPPERS AND THOROUGHLY MIXED AND BLENDED AT A CENTRAL TWIN-SHAFT PUGMILL MIXPLANT EQUIPPED WITH AN APPROVED DISCHARGE HOPPER. AFTER MIXING, THE PRODUCT SHOULD BE OF UNIFORM GRADATION AND SATISFACTORY MOISTURE CONTENT WITH NO SEGREGATION OF PARTICLES. THE TIME ELAPSING BETWEEN MIXING AND PLACING OPERATIONS MUST BE KEPT TO A MINIMUM, AND ALL MIXED MATERIAL MUST BE COMPLETELY PLACED EACH DAY AND COMPACTED BEFORE THE END OF THE DAY. /AUTHOR/

  • Publication Date: 1969-8-25

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00232737
  • Record Type: Publication
  • Report/Paper Numbers: pp 24-26
  • Files: TRIS
  • Created Date: Aug 15 2004 1:56AM