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:
  Concrete Pavements Erosion Pavements, Asphalt Concrete--Texas--Evaluation Pavements--Texas--Evaluation Subbase (Pavements) Subgrade (Pavements)
• 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.
  
  
• Format:
  PDF
• Funding:
  Project 0-6037
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dc44cb1e74130f4d32edd85acff89e34df97d727573541e3b28a57e52c9c16b9
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16864/dot_16864_DS1.pdf
• File Type:
  [PDF - 4.54 MB ]