Subbase and subgrade performance investigation for concrete pavement.

Details

• Alternative Title:
  Project title: Alternatives to asphalt concrete pavement subbases for concrete pavement
• Creators:
  Jung, Youn su ; Zollinger, Dan G. ; Won, Moon ; Wimsatt, Andrew J.
• Corporate Creators:
  Texas Transportation Institute
• Corporate Contributors:
  Texas. Dept. of Transportation. Research and Technology Implementation Office ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Subbase (Pavements)
  • Subgrade (Pavements)
  • Concrete pavements
  • Erosion
  • Pavements--Texas--Evaluation
  • Pavements, Asphalt concrete--Texas--Evaluation
• Publication/ Report Number:
  FHWA/TX-09/0-6037-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Edition:
  Technical report; Sept. 2007-Sept. 2008.
• Corporate Publisher:
  Texas Transportation Institute
• Abstract:
  Recently, TxDOT has become increasingly aware of the rising cost associated with the use of asphalt ; concrete bond breakers to meet the FHWA requirement of using a permanently stabilized, nonerodable ; subbase layer below the concrete slab. The main issue associated with this research is if cheaper alternatives ; are available for subbase construction. Subbase layers have certain functions that need to be fulfilled (one of ; them being constructability) in order to assure adequate pavement performance. One key aspect is resistance ; to erosion, and assessment of each of these functions relative to different alternatives is key to understanding ; the capability of different alternatives to perform adequately. In this respect, this project is to examine the ; design assumptions associated with each alternative and provide recommendations accordingly to include ; test methods and material specifications. ; This report describes some of the work accomplished summarizing data on subbase performance and ; testing relative to concrete pavement subbase and subgrade erosion. Findings from investigations are ; discussed to identify factors associated with erosion in the field based on various analysis methods such as ; load transfer efficiency (LTE), effective thickness, and ground penetrating radar (GPR). An approach to ; mechanistically consider the erosion process is introduced and review of current design procedures was also ; conducted as to how they address erosion. This review was extended to address erosion models included in ; the literature in terms of the relationship between measurable material properties and performance. ; Moreover, previous and current laboratory test methods for erosion testing are summarized and the test ; results of selected alternative subbase materials are discussed. Finally, the relation between k-value and slab ; behavior is discussed.
  More +
• Format:
  PDF
• Funding:
  Project 0-6037
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16864/dot_16864_DS1.pdf
• File Type:
  [PDF - 4.54 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dc44cb1e74130f4d32edd85acff89e34df97d727573541e3b28a57e52c9c16b9