High performance concrete bridge deck overlays for county bridges /
Edward J. Engle.
Description
- Language(s)
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English
- Published
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Ames, Iowa : Research and Technology Bureau, Iowa Dept. of Transportation, 2007.
- Summary
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The Iowa Method for bridge deck overlays has been very successful in Iowa since its adoption in the 1970s. This method involves removal of deteriorated portions of a bridge deck followed by placement of a layer of dense (Type O) Portland Cement Concrete (PCC). The challenge encountered with this type of bridge deck overlay is that the PCC must be mixed on-site, brought to the placement area and placed with specialized equipment. This adds considerably to the cost and limits contractor selection. A previous study (TR-427) showed that a dense PCC with high-range water reducers could successfully be used for bridge deck overlays using conventional equipment and methods. This current study evaluated the use of high performance PCC in place of a dense PCC for work on county bridges. High performance PCC uses fly ash and slag to replace some of the cement in the mix. This results in a workable PCC mix that cures to form a very low permeability overlay.
- Note
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Depository.
"Operations Research Project Number HR-2107."
"October 2007."
Also available online.
- Physical Description
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v, (18) p. :
ill. (some col.) ;
28 cm.
Viewability