EXPERIMENTAL BASES DESIGNED TO MEET BUDGETARY LIMITATIONS

EXPERIMENTAL WORK WAS CONDUCTED ON CONSTRUCTING TWO AND THREE-COURSE COMBINATION BASES USING LOCALLY AVAILABLE MATERIALS FOR BITUMINOUS SURFACES ON SECONDARY ROADS. ANOTHER PROMISING DEVELOPMENT IN SECONDARY BASE CONSTRUCTION IS THE EMPLOYMENT OF COMPOSITE BASES, USING TWO OR MORE MATERIALS, WITH OR WITHOUT STABILIZING AGENTS, BUT GENERALLY WITH A BITUMINOUS SURFACE. THE STABILIZATION OF NON- COMMERCIAL AND LOCAL BASE MATERIAL HAS BEEN ACCOMPLISHED THROUGH THE USE OF SUCH AGENTS AS CEMENT, ASPHALT, LIME, SALT AND CALCIUM CHLORIDE, TO PRODUCE A DENSE, WATER- REPELLANT BASE AT A COST WITHIN BUDGET BOUNDARIES APPLICABLE TO SECONDARY FARM-TO-MARKET ROADS. THE COMPOSITE BASES CONSISTING OF LOW-COST LOCAL MATERIAL FOR THE SUBBASE, COVERED WITH A HIGHER-CLASS AND MORE EXPENSIVE UPPER BASE MATERIAL, APPRECIABLY REDUCE COSTS. THE TWO-COURSE BASES HAVE ADVANTAGES BECAUSE THE FIRST COURSE GRANULAR MATERIAL GIVES BETTER VERTICAL AND HORIZONTAL DRAINAGE. THE TOP COURSE OF GRADED CRUSHED AGGREGATE GIVES A SURFACE WITH GOOD RIDING QUALITIES AND A GOOD SURFACE FOR THE APPLICATION OF A LOW-COST BITUMINOUS TREATMENT. THIS TYPE OF CONSTRUCTION IS AN ADAPTATION OF THE MULTI-LAYER BASES INCORPORATING DIFFERENT MATERIALS USED IN THE CONSTRUCTION OF TOLL ROADS.

  • Availability:
  • Supplemental Notes:
    • Vol 24, No 5, PP 21-23, 36, 1 FIG, 1 TAB, 7 PHOT
  • Authors:
    • Cooney, J G
  • Publication Date: 1954-5

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  • Accession Number: 00214854
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 12 1994 12:00AM