Evaluation Of High Slump Concrete For Bridge Deck Overlays PDF Download
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Author | : Brian Keierleber |
Publisher | : |
Total Pages | : 42 |
Release | : 2005 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of High-slump Concrete for Bridge Deck Overlays Book in PDF, ePub and Kindle
The Iowa Method for bridge deck overlays has been very successful in Iowa since its adoption in the 1970's. 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, because not all contractors have the capacity or equipment required. If it is possible for a ready-mix supplier to manufacture and deliver a dense PCC to the grade, then any competent bridge deck contractor would be able to complete the job. However, Type O concrete mixes are very stiff and generally cannot be transported and placed with ready-mix type trucks. This is where a "super-plasticizer" comes in to use. Addition of this admixture provides a substantial increase in the workability of the concrete - to the extent that it can be delivered to the site and placed on the deck directly out of a ready-mix truck. The objective of this research was to determine the feasibility of placing a deck overlay of this type on county bridges within the limits of county budgets and workforce/contractor availability.
Author | : Khossrow Babaei |
Publisher | : |
Total Pages | : 112 |
Release | : 1987 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of Concrete Overlays for Bridge Applications Book in PDF, ePub and Kindle
Author | : Tony R. Schmitt |
Publisher | : |
Total Pages | : 174 |
Release | : 1995 |
Genre | : Concrete bridges |
ISBN | : |
Download Cracking in Concrete Bridge Decks Book in PDF, ePub and Kindle
The causes of cracking in bridge decks are investigated and procedures are recommended to alleviate the problem. Forty continuous steel girder bridges, thirty-seven composite and three noncomposite bridges are evaluated. Field surveys conducted to document cracking patterns and to determine the crack density of each bridge are described. Information collected from construction documents, field books, and weather data logs is presented and compared to the observed levels of cracking to identify correlations between cracking and the variables studied. Thirty-one variables are considered such as material properties, site conditions, construction procedures, design specifications, age of bridge and traffic volume. Based on the research reported herein, cracking in monolithic bridge decks increases with increasing values of concrete slump, percent volume of water and cement, water content, and compressive strength, and decreasing values of air content (especially below 6.0%). Bridge deck overlays placed with zero slump concrete consistently exhibit high levels of cracking. Cracking in overlays also increases as placement lengths increase. High maximum air temperatures and large changes in air temperature on the day of casting aggravate cracking in monolithic bridge decks. High average air temperatures and large changes in air temperature similarly aggravate cracking in bridge deck overlays. Both monolithic and two layer bridges with fixed-ended girders exhibit increased cracking near the abutments compared to those with pin-ended girders.
Author | : H. G. Russell |
Publisher | : Transportation Research Board |
Total Pages | : 188 |
Release | : 2004 |
Genre | : Bridges |
ISBN | : 0309070112 |
Download Concrete Bridge Deck Performance Book in PDF, ePub and Kindle
At head of title: National Cooperative Highway Research Program.
Author | : J. E. Simonsen |
Publisher | : |
Total Pages | : 9 |
Release | : 1988 |
Genre | : Bridges |
ISBN | : |
Download Low-slump High-density Concrete Bridge Deck Overlay Book in PDF, ePub and Kindle
Author | : V. Ramakrishnan |
Publisher | : |
Total Pages | : 272 |
Release | : 2001 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of High Performance Concrete in Four Bridge Decks, as Well as Prestressed Girders for Two Bridges Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 464 |
Release | : 1985 |
Genre | : Highway research |
ISBN | : |
Download National Experimental Projects Tabulation Book in PDF, ePub and Kindle
Author | : Richard D. Smith |
Publisher | : |
Total Pages | : 24 |
Release | : 1983 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of Dense Bridge Floor Concrete Using High Range Water Reducer (superplasticizer) Book in PDF, ePub and Kindle
To prevent bridge deck deterioration by using a high range water reducing admixture (HRWR) to obtain a dense concrete that is workable during construction to prevent chloride intrusion.
Author | : W. P. Chamberlin |
Publisher | : |
Total Pages | : 291 |
Release | : 1994 |
Genre | : Bridges |
ISBN | : |
Download Field Performance of Latex-modified and Low-slump Dense Concrete Bridge Deck Overlays in the United States Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 294 |
Release | : 1998 |
Genre | : Bridges |
ISBN | : |
Download Technologies for Improving the Evaluation and Repair of Concrete Bridge Decks Book in PDF, ePub and Kindle