Guide Specifications for Concrete Overlays of Pavements and Bridge Decks
Author :
Publisher :
Page : pages
File Size : 49,86 MB
Release : 1990
Category : Bridges
ISBN :
Author :
Publisher :
Page : pages
File Size : 49,86 MB
Release : 1990
Category : Bridges
ISBN :
Author :
Publisher :
Page : pages
File Size : 34,10 MB
Release : 1990*
Category : Bridges
ISBN :
Author :
Publisher :
Page : pages
File Size : 18,60 MB
Release : 1990
Category : Bridges
ISBN :
Author : American Association of State Highway and Transportation Officials
Publisher :
Page : pages
File Size : 16,93 MB
Release : 1990
Category :
ISBN :
Author : David W. Fowler
Publisher : Transportation Research Board
Page : 75 pages
File Size : 42,26 MB
Release : 2011
Category : Technology & Engineering
ISBN : 0309143543
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 423: Long-Term Performance of Polymer Concrete for Bridge Decks addresses a number of topics related to thin polymer overlays (TPOs). Those topics include previous research, specifications, and procedures on TPOs; performance of TPOs based on field applications; the primary factors that influence TPO performance; current construction guidelines for TPOs related to surface preparation, mixing and placement, consolidation, finishing, and curing; repair procedures; factors that influence the performance of overlays, including life-cycle cost, benefits and costs, bridge deck condition, service life extension, and performance; and successes and failures of TPOs, including reasons for both.
Author : American Association of State Highway and Transportation Officials
Publisher : AASHTO
Page : 1054 pages
File Size : 14,50 MB
Release : 2002
Category : Technology & Engineering
ISBN : 1560511710
Author : Wisconsin. Department of Transportation
Publisher :
Page : 776 pages
File Size : 27,51 MB
Release : 1996
Category : Bridges
ISBN :
Author : American Association of State Highway and Transportation Officials. Subcommittee on Bridges and Structures
Publisher : AASHTO
Page : 274 pages
File Size : 17,36 MB
Release : 2007
Category : Movable bridges
ISBN : 1560513691
Author : David Meggers
Publisher :
Page : 116 pages
File Size : 49,64 MB
Release : 2007
Category : Bridges
ISBN :
Bridges in Kansas are exposed to winter conditions, including deicing chemicals used to keep the roads and bridges clear of ice and snow. These chemicals and water are harmful to the concrete and the steel reinforcing bars used in bridge structures. The objective of this study was to develop a durable thin bonded overlay with chloride resistance to protect the reinforcing steel of the bridge deck. Overlays were developed and monitored after their initial placement on four bridges. The overlay materials selected by the Kansas Department of Transportation (KDOT) had promising results from laboratory testing. Four different overlay materials were selected based upon KDOT's laboratory results and were tested on four separate bridge decks. Three of the bridges are located in Greenwood County and one in Sedgwick County. All four bridges were new construction; the three in Greenwood County are pre-stressed concrete girder design and the Sedgwick County Bridge is a steel girder design. The data from the testing and monitoring were used to determine if there are benefits to using thin bonded overlays for bridge deck wearing surfaces and which types of thin bonded overlays have the largest benefits. The materials chosen for the overlays were: Type IP cement concrete, Type IP cement with 3% silica fume concrete, Type I / II cement with 5% silica fume and polypropylene fibers concrete, and Type II cement with 5% silica fume and steel fibers concrete. Construction samples and bridge deck cores were tested for compressive strength, permeability, chloride concentration, overlay adhesion, and cracking resistance. The permeability tests showed the overlays containing the Type IP cement were the least permeable while the steel and polypropylene fiber overlays were the most permeable. The Type IP cement overlays meet the design specification of passing less than 1,000 coulombs (1.5 inch thickness); however, the overlays with the fibers do not. The ability of each overlay to resist chloride ion migration will only truly be known as 'in service' time accrues. Based upon the chloride ion contamination after five years, all overlays would appear to be functioning equally unless there is cracking in the overlay.
Author : ACI Committee 548, Polymers in Concrete
Publisher :
Page : 8 pages
File Size : 24,83 MB
Release : 2012
Category : Concrete
ISBN :