EFFECTIVENESS OF GRANULAR BASES FOR PREVENTING PUMPING OF RIGID PAVEMENTS

THIS STUDY COVERS A CONDITION SURVEY IN INDIANA OF 328.5 MI. OF RIGID PAVEMENTS CONSTRUCTED WITH GRANULAR BASES. INDIANA HAS CONSTRUCTED A LARGE MILEAGE OF RIGID PAVEMENTS. MOST OF THESE HAVE PERFORMED SATISFACTORILY, BUT SOME HAVE SHOWN DISTRESS. PUMPING HAS BEEN ONE OF THE MAJOR PROBLEMS IN THESE PAVEMENTS, AND MUCH STUDY HAS BEEN GIVEN TO PUMPING BY MANY AGENCIES, INCLUDING A SPECIAL PROJECT COMMITTEE OF THE HIGHWAY RESEARCH BOARD, THE JOINT HIGHWAY RESEARCH PROJECT OF PURDUE UNIVERSITY, AND MANY STATE HIGHWAY DEPARTMENTS. DATA WERE GATHERED ON SIX TYPES OF DISTRESS RELATED TO PUMPING: (1) ACTIVE PUMPING AT JOINTS OR CRACKS, (2) ACTIVE PUMPING ALONG PAVEMENT EDGES, (3) INACTIVE PUMPING AT JOINTS OR CRACKS, (4) INACTIVE PUMPING ALONG PAVEMENT EDGES, (5) PUMPING OUT OF BASE COURSE MATERIALS RESULTING IN SECOND STAGE BLOWS, AND (6) PUMPING OUT OF WATER FROM BASE COURSE OR ON TOP OF BASE RESULTING IN FIRST-STAGE BLOWS. THE TERMS SECOND-STAGE BLOWS AND FIRST-STAGE BLOWS HAVE BEEN COINED FOR THIS REPORT AND THE TERMS COVER TYPES OF DISTRESS THAT ARE COMPARATIVELY NEW. ANALYSIS OF THE DATA IS DIVIDED INTO TWO SECTIONS: (1) GENERAL PERFORMANCE OF THE BASES AND PAVEMENTS STUDIED. SPECIFICATIONS FOR 13 PERFORMANCE GROUPINGS WERE FORMULATED, RANGING FROM GROUP 1, COVERING PROJECTS WITH NO PUMPING DEFECTS, THROUGH GROUP 13, COVERING PROJECTS WITH THE POOREST PERFORMANCE OF THOSE STUDIED. SPECIFICATIONS FOR THE VARIOUS GROUPS ARE EXPRESSED IN THE NUMBER OF DEFECTS PER MILE FOR EACH CLASS OF DEFECT. A SUMMARY IS INCLUDED TO SHOW THE NUMBER OF MILES FALLING INTO EACH SPECIFICATION GROUP AND (2) EXTENT OR DEGREE TO WHICH THE VARIOUS DEFECTS EXIST ON EACH PROJECT. DEFECTS ON EACH PROJECT WERE CLASSIFIED AS SLIGHT, MODERATE, OR LARGE. A SUMMARY IS INCLUDED WHICH SHOWS MILEAGE FALLING INTO EACH OF THESE CATEGORIES FOR THE SIX TYPES OF PUMPING DEFECTS STUDIED. ANOTHER SUMMARY IS INCLUDED, WHICH SHOWS THE MILES AND PERCENTAGES FALLING INTO THE EXTREME LOWER LIMITS OF THE SLIGHT CATEGORY. THE DATA AND ANALYSES SHOW THAT GRANULAR BASES HAVE BEEN EFFECTIVE IN PREVENTING PUMPING OF RIGID PAVEMENTS IN INDIANA UP TO THE TIME THE STUDY WAS MADE. /AUTHOR/

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  • Supplemental Notes:
    • No 52, pp 1-28, 19 FIG, 6 TAB, 11 REF Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Authors:
    • Vogelgesang, Carl E
  • Discussers:
    • Brokaw, M P
  • Publication Date: 1952

Language

  • English

Media Info

  • Monograph Title: Performance of concrete pavement on granular subbase
  • Serial:

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Filing Info

  • Accession Number: 00232485
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 2004 2:43AM