A STUDY OF THE ECONOMICS OF STAGE CONSTRUCTION FOR ROAD PAVEMENTS

THE COSTS OF VARIOUS FORMS OF TWO-STAGE CONSTRUCTION ARE COMPARED THEORETICALLY WITH THOSE OF SINGLE-STAGE DESIGNS OF THE SAME OVERALL LIFE. IN GENERAL A SIMPLE COSTING SYSTEM IS USED, BUT A MORE DETAILED ONE IS APPLIED TO SOME OF THE FLEXIBLE PAVEMENTS. THE SENSITIVITY OF THE RESULTS TO TRAFFIC GROWTH RATE AND FINANCIAL DISCOUNT RATE IS INVESTIGATED. FOR A CONCRETE PAVEMENT A LONG INITIAL LIFE SEEMS ECONOMIC, AND TWO-STAGE CONSTRUCTION IS UNLIKELY TO BE WORTHWHILE FOR OVERALL LIVES LESS THAN ABOUT 80 YEARS. THIS IS PARTLY DUE TO THE INHERENT STRUCTURAL CHARACTERISTICS OF THE MATERIAL AND PARTLY TO THE DIFFICULTIES OF ADDING A THIN OVERLAY TO A CONCRETE PAVEMENT FOR FLEXIBLE PAVEMENTS, PARTICULARLY THOSE NOT HAVING CEMENT-BOUND BASES, TWO-STAGE CONSTRUCTION OFFERS GREATER ADVANTAGES, PARTLY DUE TO THEIR ADAPTABILITY TO CHANGING CONDITIONS. IT IS DOUBTFUL WHETHER IT IS WORTH DESIGNING FOR AN INITIAL LIFE OF MORE THAN ABOUT 20 YEARS, EVEN IF MUCH LONGER OVERALL LIVES ARE INTENDED. THERE ARE APPARENT ADVANTAGES WITH OVERALL DESIGN LIVES AS LOW AS 20 YEARS, BUT IT IS UNCERTAIN WHETHER SUCH ADVANTAGES WOULD BE REALIZED IN PRACTICE. /AUTHOR/

  • Supplemental Notes:
    • Rrl Rept Lr 286, 40 PP, 11 FIGS
  • Authors:
    • Thrower, E N
    • Burt, M E
  • Publication Date: 1969

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Filing Info

  • Accession Number: 00201760
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Jul 27 1970 12:00AM