Low Permeability Concrete For Bridge Deck Overlay
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Author | : Robert F. Steffes |
Publisher | : |
Total Pages | : 43 |
Release | : 1993 |
Genre | : Bridges |
ISBN | : |
The penetration of chloride ions from deicing salts into the portland cement concrete of bridge decks can cause corrosion and serious damage to the reinforcing steel. Concrete properties which prevent chloride penetration into the bridge deck and provide a good structural and economic wearing surface are desirable. A variety of mix designs have been tried in the past in search of improved performance and lower costs for bridge deck overlay concrete. A group of mixes with various designs have been tested in this project and results are being compared to determine which concrete mix appears to be the most cost effective and resistant to chloride penetration for bridge deck overlay use.
Author | : H. G. Russell |
Publisher | : Transportation Research Board |
Total Pages | : 188 |
Release | : 2004 |
Genre | : Bridges |
ISBN | : 0309070112 |
At head of title: National Cooperative Highway Research Program.
Author | : William P. Chamberlin |
Publisher | : |
Total Pages | : 36 |
Release | : 1990 |
Genre | : Bridges |
ISBN | : |
Fifty randomly selected concrete bridge decks in New York State, overlaid with low-slump concrete, were studied in 1985 after an average of 5 years of service. The investigation included recording surface defects, measuring delamination and half-cell potentials, and sampling and testing for deck chloride profile. Conclusions are drawn with regard to the nature and significance of the observed damage, and estimates are made of service life expectancy. Policy implications for the New York State Department of Transportation are discussed.
Author | : Brian A. Pfeifer |
Publisher | : |
Total Pages | : 100 |
Release | : 1999 |
Genre | : Concrete bridges |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 204 |
Release | : 1998 |
Genre | : Concrete bridges |
ISBN | : |
The reported research examines the bond strength between overlays placed over bridge decks which are sealed with epoxy resin or high molecular weight methacrylate (HMWM) sealers. The study involved field and laboratory experimental testing of cores under direct shear, Strategic Highway Research Program (SHRP) interfacial specimens, beams, and a 1/3-scale bridge subassembly of a typical steel stringer bridge. Micro-silica modified concrete, latex modified concrete, and superplasticized dense concrete overlays were used in this study. The experimental data were complemented with finite element studies. Despite often stark variations in the values of bond strength obtained from different testing methods, the data universally suggest that the use of a sealer at the interface can reduce the available bond strength.
Author | : Kenneth C. Clear |
Publisher | : |
Total Pages | : 132 |
Release | : 1978 |
Genre | : Bridges, Concrete |
ISBN | : |
Styrene-butadiene (S/B) latex modified concrete overlays are being used to protect new bridge decks from rapid deicer-borne chloride intrusion and also in bridge deck rehabilitation efforts. The purposes of this research were to evaluate several commercially-available S/B latex modifiers for bridge deck overlay concrete; and to develop chemical specifications for the material, a prequalification program to permit evaluation of other S/B latex modifiers which become available, and a certification program to insure the user receives a prequalified product. The chemical and physical properties of the latex emulsions were studied (percent solids, percent butadiene, particle size, surface tension, viscosity, etc.) and the material from each manufacturer was finger printed using infrared spectroscopy. The physical properties of concrete made with each material were also determined (workability, strength-compressive, flexural and bond, freeze-thaw and scaling resistance, and chloride permeability).
Author | : |
Publisher | : |
Total Pages | : 294 |
Release | : 1998 |
Genre | : Bridges |
ISBN | : |
Author | : David Whiting |
Publisher | : Transportation Research Board |
Total Pages | : 124 |
Release | : 1998 |
Genre | : Technology & Engineering |
ISBN | : 9780309062701 |
Author | : Mohiuddin Ali Khan |
Publisher | : Elsevier |
Total Pages | : 651 |
Release | : 2014-08-12 |
Genre | : Technology & Engineering |
ISBN | : 0124072259 |
The traveling public has no patience for prolonged, high cost construction projects. This puts highway construction contractors under intense pressure to minimize traffic disruptions and construction cost. Actively promoted by the Federal Highway Administration, there are hundreds of accelerated bridge construction (ABC) construction programs in the United States, Europe and Japan. Accelerated Bridge Construction: Best Practices and Techniques provides a wide range of construction techniques, processes and technologies designed to maximize bridge construction or reconstruction operations while minimizing project delays and community disruption. - Describes design methods for accelerated bridge substructure construction; reducing foundation construction time and methods by using pile bents - Explains applications to steel bridges, temporary bridges in place of detours using quick erection and demolition - Covers design-build systems' boon to ABC; development of software; use of fiber reinforced polymer (FRP) - Includes applications to glulam and sawn lumber bridges, precast concrete bridges, precast joints details; use of lightweight aggregate concrete, aluminum and high-performance steel
Author | : H. G. Russell |
Publisher | : Transportation Research Board |
Total Pages | : 67 |
Release | : 2012 |
Genre | : House & Home |
ISBN | : 0309223466 |
TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 425: Waterproofing Membranes for Concrete Bridge Decks documents information on materials, specification requirements, design details, application methods, system performance, and costs of waterproofing membranes used on new and existing bridge decks since 1995.