Field Study of Air Content Stability in the Slip Form Paving Process

Project Details
STATE

WI

SOURCE

NC2

END DATE

01/01/13

RESEARCHERS

Prashant Ram, Tom Van Dam, Lawrence Sutter, Gerald Anzalone, Kurt Smith Applied Pavement Technology, Inc. Urbana, Illinois

SPONSORS

WisDOT

KEYWORDS

air void system

Project description

The objective of this study is to evaluate the impacts of vibration and consolidation of modern slipform pavers used in Wisconsin on the air-void structure and air content of portland cement concrete pavements. The primary intent is to quantify the air content of fresh concrete before and after it has gone through the slipform paver. The air-void system parameters of hardened concrete are then assessed using cast and extracted core specimens. Determining the changes that occur to the air content and air-void system parameters will assist in identifying appropriate air content target values, thereby allowing WisDOT and the Wisconsin paving industry to optimize the properties of the mix to ensure the in-place concrete meets or exceeds desired properties.
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