Field Study of Air Content Stability in the Slipform Paving Process

This study evaluated the impacts of construction on the air content and air void system structure of portland cement concrete pavements. The primary intent was to quantify the air content of fresh concrete before and after it had gone through the slipform paver. The air void system parameters of hardened concrete were then assessed with cast cylinders and extracted core specimens. The results of the air content testing on fresh concrete and the concrete cylinder specimens cast in the field suggested that some loss of air (approximately 1%) occurred as the concrete passed through the paver. Laboratory testing performed on cores extracted from the pavement did not provide conclusive evidence that entrained air was lost during the slipform paving process. In fact, many extracted cores had measured air content values that were much higher than those measured in the fresh concrete and even higher than the specification requirement. If excessive, such values could result in increased permeability and low-strength-related issues. The results suggested that the air content testing on fresh concrete did not capture the true air content of the concrete as it was placed with a slipform paver. The fresh concrete air content in general was lower than was the air content measured in the cores.

• Record URL:
  https://doi.org/10.3141/2408-07
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Field+Study+of+Air+Content+Stability+in+the+Slipform+Paving+Process&author=P.+Ram&author=T.+Van+Dam&author=L.+Sutter&author=G.+Anzalone&author=K.+Smith&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309294997
• Authors:
  • Ram, Prashant V
  • 0000-0003-4229-998X
  • Van Dam, Thomas J
  • Sutter, Larry L
  • Anzalone, Gerald
  • Smith, Kurt D
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 55–65
• Monograph Title: Construction 2014
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2408
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Air content; Air voids; Field studies; Laboratory tests; Portland cement concrete; Slip form paving
• Subject Areas: Construction; Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I32: Concrete;

Filing Info

• Accession Number: 01519657
• Record Type: Publication
• ISBN: 9780309294997
• Report/Paper Numbers: 14-4816
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Mar 26 2014 10:07AM