SERVICE PERFORMANCE OF CEMENT-TREATED BASES AS USED IN COMPOSITE PAVEMENTS

ONE HUNDRED SEVENTY-FIVE CEMENT-TREATED BASE (CTB) COMPOSITE PAVEMENTS WITH VARYING CEMENT BUILT BETWEEN 1950 AND 1962 WERE EVALUATED: 64 PER CENT ARE GIVING EXCELLENT SERVICE, 17 PERCENT WERE RATED GOOD, 8 PERCENT WERE RATED FAIR, AND 11 PERCENT REQUIRED EXTENSIVE MAINTENANCE EARLY IN THEIR DESIGN LIVES. THE MAIN CAUSES OF FAILURE APPEARED TO BE INSUFFICIENT CEMENT CONTENT, POOR MIXING OF CEMENT, EXCESSIVE TRIMMING OF THE COMPACTED CTB, INSUFFICIENT CTB THICKNESS, INADEQUATE CTB COMPACTION, OR DEFICIENCES IN THE ASPHALT CONCRETE SURFACING THICKNESS OR QUALITY. A SIGNIFICANT IMPROVEMENT IN THE PERFORMANCE OF CTB COMPOSITE PAVEMENTS WAS ATTRIBUTED TO EXTENDING THE CTB AT LEAST 1 FT INTO THE SHOULDER; PLANT-MIXING THE CTB; BUILDING THE PROJECT IN A TEMPERATE CLIMATE; INCREASING THE THICKNESS OF THE ASPHALT CONCRETE SURFACING; LIMITING THE COMPACTED THICKNESS OF ANY ONE LAYER OF CTB TO 0.50 FT; USING TYPE II RATHER THAN TYPE I CEMENT, USING A MINIMUM CTB THICKNESS OF 0.50 FT; AND PROVIDING A MINIMUM IN-PLACE CTB COMPRESSIVE STRENGTH OF 500 PSI. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1969/291/291-005.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Composite Pavement Design and presented at the 48th Annual Meeting. 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:
  • Zube, Ernest
  • Gates, C G
  • Shirley, E C
  • Munday Jr, H A
• Publication Date: 1969

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 57-69
• Monograph Title: Design, evaluation, and performance of pavement systems
• Serial:
  • Highway Research Record
  • Issue Number: 291
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt concrete; Base course (Pavements); Bituminous materials; Cement content; Cement treated soils; Compaction; Composite pavements; Compressive strength; Pavement performance; Surface treating; Thickness
• Uncontrolled Terms: Cement treated bases
• Old TRIS Terms: Bituminous surfacing
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00207056
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Mar 9 1970 12:00AM