INVESTIGATION OF BASE COURSES OF FLEXIBLE PAVEMENTS

THE CAPACITIES OF THREE DIFFERENT STANDARD INLET GRATING F THE PERFORMANCE OF A SELECTED GROUP OF FLEXIBLE PAVEMENTS OF TRANSPORTATION WERE DETERMINED IN A GRASSED DRAINAGE COURSE MATERIALS AND DESIGNS HAVE ON PERFORMANCE. SLOPE RANGED FROM 0.5% TO 8%, THE SWALE SLOPE WAS EITHER PRIMARILY BY PRESENT SERVICEABILITY INDEX (PSI) RATINGS THE DRAINAGE INLETS STUDIES WERE (1) TYPE H INLET, (2) TYPE 18-INCH DIAMETER CORE SAMPLES. THE EECONOMICS OF THE THE TYPE H INLET CONSISTED OF THE STANDARD AND TWO PROPOSED A COMPARATIVE COST ANALYSIS OF ALL THE FLEXIBLE PAVEMENTS SCALE OF THE PROTOTYPE AND WAS TESTED UNDER SEVERAL CHANNEL RESULTS OF THE LABORATORY AND FIELD TESTS TAKEN ON THE 30 CAPACITY OF AN INLET GRATING WAS DETERMINED BY ACTUAL RESULTS FROM 19 CONTRACTS ARE INCLUDED FOR THE FIRST TIME OBTAINED. A SERIES OF CURVES, RELATING EFFICIENCY TO SURVEYED WAS GENERALLY ADEQUATE FOR THE TRAFFIC LOADS MORE WATER FLOWS IN THE CHANNEL TOWARD AN INLET GRATING, THE HOWEVER, SHOULD BE GIVEN TO THE SUBSTITUTION OF OTHER BASE FROM THIS INVESTIGATION PROVIDES INFORMATION THAT IS MORE CONDITIONS PERMIT, IN ORDER TO ACHIEVE LOWER INITIAL DRAINAGE INLETS IN GRASSED CHANNELS ALONG HIGHWAYS THAN IS GRAVEL BASE COURSES AND THIN BITUMINOUS CONCRETE SURFACE COURSES SHOULD BE RESTRICTED TO ROADS CARRYING LOW TRAFFIC LOADS. /FHWA/

  • Supplemental Notes:
    • Contract AW-72-59-46
  • Corporate Authors:

    Maryland Department of Transportation

    State Highway Administration, 707 N Calvert Street
    Baltimore, MD  United States  21202
  • Authors:
    • Stromberg, F J
  • Publication Date: 1972-9

Media Info

  • Pagination: 227 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00206527
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: Final Rept
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jul 16 1974 12:00AM